@import "https://fonts.googleapis.com/css2?family=Nunito:wght@600;700;800;900&display=swap";:root{line-height:1.5}.auth-page{justify-content:center;width:100%;max-width:480px;min-height:100dvh;margin-left:auto;margin-right:auto;padding-top:40px;padding-bottom:40px}.auth-brand{text-align:center;margin-bottom:4px}.auth-brand__logo{color:var(--text);letter-spacing:-.5px;margin:0 0 6px;font-size:32px;font-weight:900}.auth-brand__maverick{color:var(--amber)}.auth-brand__tagline{color:var(--muted);margin:0;font-size:14px;font-weight:600}.auth-card{border:1px solid var(--border-md);border-radius:var(--r-lg);background:#ffffff0a;flex-direction:column;gap:16px;padding:28px 24px;display:flex}.auth-card__heading{color:var(--text);margin:0;font-size:20px;font-weight:900}.auth-tabs{background:var(--surface);border-radius:var(--r-sm);gap:4px;padding:4px;display:flex}.auth-tab{height:36px;font-family:var(--font);color:var(--muted);cursor:pointer;background:0 0;border:none;border-radius:8px;flex:1;font-size:14px;font-weight:800;transition:background .12s,color .12s}.auth-tab.is-active{background:var(--blue);color:#fff}.auth-tab:disabled{opacity:.45;cursor:not-allowed}.auth-tab:focus-visible{outline:2px solid var(--blue);outline-offset:2px}.auth-google-hidden{opacity:0;pointer-events:none;width:1px;height:1px;position:absolute;overflow:hidden}.auth-google-btn{width:100%}.auth-divider{color:var(--muted);text-transform:uppercase;letter-spacing:.06em;align-items:center;gap:10px;font-size:12px;font-weight:700;display:flex}.auth-divider:before,.auth-divider:after{content:"";background:var(--border-md);flex:1;height:1px}.auth-form{flex-direction:column;gap:14px;display:flex}.auth-fieldset{border:none;flex-direction:column;gap:14px;min-width:0;margin:0;padding:0;display:flex}.field{flex-direction:column;gap:6px;display:flex}.field label{color:var(--muted);text-transform:uppercase;letter-spacing:.06em;font-size:12px;font-weight:800}.auth-input{border:1.5px solid var(--border-md);border-radius:var(--r-sm);width:100%;height:48px;color:var(--text);font-family:var(--font);background:#ffffff0f;outline:none;padding:0 14px;font-size:15px;font-weight:600;transition:border-color .15s,background .15s}.auth-input::placeholder{color:var(--muted);opacity:.6}.auth-input:focus{border-color:var(--blue);background:#2b5ce614}.auth-input:disabled{opacity:.45;cursor:not-allowed}.auth-input[aria-invalid=true]{border-color:var(--coral)}.auth-password-block{flex-direction:column;gap:6px;display:flex}.auth-input-wrap{align-items:center;display:flex;position:relative}.auth-input-wrap .auth-input{padding-right:48px}.auth-eye-btn{cursor:pointer;width:44px;color:var(--muted);background:0 0;border:none;justify-content:center;align-items:center;padding:0;transition:color .12s;display:flex;position:absolute;top:0;bottom:0;right:0}.auth-eye-btn:hover{color:var(--text)}.auth-success{border-radius:var(--r-xs);color:#4ade80;background:#16a34a1f;border:1px solid #16a34a40;margin:0;padding:10px 12px;font-size:13px;font-weight:700}.auth-forgot-intro{color:var(--muted);margin:0;font-size:14px;font-weight:600;line-height:1.5}.auth-footer-text{color:var(--muted);text-align:center;margin:0;font-size:13px;font-weight:700}.auth-link-btn{font:inherit;color:var(--blue-lt);cursor:pointer;background:0 0;border:none;padding:0;font-size:13px;font-weight:700}.auth-link-btn:hover:not(:disabled){text-underline-offset:2px;text-decoration:underline}.auth-link-btn:disabled{opacity:.45;cursor:not-allowed}.auth-footer-link{color:var(--blue-lt);font-weight:700;text-decoration:none}.auth-footer-link:hover{text-underline-offset:2px;text-decoration:underline}.onboarding-progress{color:#64748b;margin:0 0 .5rem;font-size:.875rem}.onboarding-panel{background:#fff;border:1px solid #e2e8f0;border-radius:12px;margin:1rem 0;padding:1rem 1.25rem}.onboarding-panel h2{margin:0 0 .5rem;font-size:1.1rem}.onboarding-links{margin:.75rem 0 0;padding-left:1.25rem}.onboarding-checklist{margin:.5rem 0 0;padding-left:1.25rem}.onboarding-checklist li{margin-bottom:.5rem}.onboarding-actions{flex-wrap:wrap;align-items:center;gap:.75rem;margin-top:1.25rem;display:flex}.onboarding-actions button{cursor:pointer;background:#fff;border:1px solid #cbd5e1;border-radius:8px;padding:.5rem 1rem;font-size:.95rem}.onboarding-actions button:disabled{opacity:.7;cursor:default}.onboarding-skip{background:#f8fafc!important;border-color:#94a3b8!important}.link-button{color:#2563eb;cursor:pointer;font:inherit;background:0 0;border:none;padding:0;text-decoration:underline}a{color:#2563eb}.file-drop-zone{text-align:center;cursor:pointer;background:#fff;border:2px dashed #94a3b8;border-radius:8px;margin-top:.5rem;padding:2rem}.file-drop-zone--active{background:#eff6ff;border-color:#2563eb}.file-drop-zone--disabled{opacity:.6;cursor:not-allowed}.file-drop-zone__hint{color:#64748b;margin:.5rem 0 0;font-size:.875rem}.upload-section{margin-bottom:1.5rem}.inline-course-form{flex-wrap:wrap;gap:.5rem;margin-top:.75rem;display:flex}.inline-course-form input{flex:1;min-width:12rem;padding:.4rem .5rem}.upload-submit{margin-top:1rem;padding:.5rem 1rem}.file-selected{margin-top:.75rem}.form-error{background:var(--coral-dim);border:1px solid var(--coral-border);border-radius:var(--r-xs);color:#ff6b4a;margin:0;padding:10px 12px;font-size:13px;font-weight:700}.form-field-error{color:#ff6b4a;margin:0;font-size:12px;font-weight:700}.form-hint{color:var(--muted);margin:0;font-size:12px;font-weight:600}.lane-status-list{max-width:24rem;margin:0;padding:0;list-style:none}.lane-status-list li{background:#fff;border:1px solid #e2e8f0;border-radius:6px;justify-content:space-between;margin-bottom:.35rem;padding:.5rem .75rem;display:flex}.lane-status--pending .lane-status__value{color:#64748b}.lane-status--processing .lane-status__value{color:#b45309}.lane-status--completed .lane-status__value{color:#15803d}.lane-status--failed .lane-status__value{color:#b91c1c}.processing-summary{margin:1rem 0}.processing-done{color:#15803d;margin-top:1rem}.processing-partial{background:#eff6ff;border:1px solid #bfdbfe;border-radius:10px;margin-top:1.25rem;padding:1rem 1.1rem}.processing-partial__lead{color:#1e3a5f;margin:0 0 .65rem;font-size:.95rem}.processing-partial__actions{margin:0;font-size:.95rem}.processing-partial__hub{font-weight:700}.auth-loading{color:var(--muted);text-align:center;font-size:14px;font-weight:600}.processing-banner{background:var(--blue-dim);border-bottom:1px solid var(--blue-border);color:var(--text);padding:.65rem 1rem;font-size:.9rem}.processing-banner p{margin:0;text-align:center;max-width:50rem;margin-inline:auto}.processing-page__note{color:#475569;max-width:40rem;font-size:.9rem}.processing-summary__title{margin-bottom:.35rem}.processing-summary__eta{color:#475569;margin:0 0 .75rem;font-size:.95rem}.processing-summary__long-wait{color:#92400e;background:#fffbeb;border:1px solid #fcd34d;border-radius:8px;margin:0 0 1rem;padding:.65rem .85rem;font-size:.9rem}.processing-progress-bar{background:#e2e8f0;border-radius:999px;max-width:28rem;height:8px;overflow:hidden}.processing-progress-bar__fill{background:linear-gradient(90deg,#22c55e,#16a34a);border-radius:999px;height:100%;transition:width .35s}.processing-tools-heading{margin-top:1.5rem;margin-bottom:.5rem}.processing-lane-list{max-width:32rem;margin:0;padding:0;list-style:none}.processing-lane-list>li{background:#fff;border:1px solid #e2e8f0;border-radius:8px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.5rem .75rem;margin-bottom:.4rem;padding:.6rem .85rem;display:flex}.processing-lane__row{flex:1;justify-content:space-between;align-items:center;gap:.75rem;min-width:12rem;display:flex}.processing-lane__label{color:#0f172a;font-weight:600}.processing-lane__detail{color:#64748b;font-size:.9rem}.processing-lane--completed .processing-lane__detail{color:#15803d;font-weight:600}.processing-lane--failed .processing-lane__detail{color:#b91c1c}.processing-lane__detail--pulse{color:#b45309;animation:1.25s ease-in-out infinite processing-pulse}@keyframes processing-pulse{0%,to{opacity:1}50%{opacity:.45}}.processing-lane__retry{color:#c2410c;cursor:pointer;background:#fff5f5;border:1px solid #f4a4a4;border-radius:6px;padding:.35rem .65rem;font-size:.8rem;font-weight:600}.processing-lane__retry:hover:not(:disabled){background:#ffe4e4}.processing-lane__retry:disabled{opacity:.65;cursor:not-allowed}.processing-success{background:#ecfdf5;border:1px solid #6ee7b7;border-radius:10px;flex-direction:column;align-items:flex-start;gap:.25rem;max-width:28rem;margin:1.25rem 0;padding:1rem 1.15rem;display:flex}.processing-success__icon{color:#fff;background:#22c55e;border-radius:999px;justify-content:center;align-items:center;width:1.75rem;height:1.75rem;font-size:1rem;font-weight:800;line-height:1;display:inline-flex}.processing-success__text{color:#047857;margin:0;font-size:1.1rem;font-weight:700}.processing-success__sub{color:#065f46;margin:0;font-size:.9rem}.study-hub{max-width:48rem;padding-left:max(1.5rem, env(safe-area-inset-left,0px));padding-right:max(1.5rem, env(safe-area-inset-right,0px))}.study-hub__nav{margin-bottom:1rem;font-size:.9rem}.study-hub__title{margin-top:0}.study-hub__meta{color:var(--muted);margin-bottom:1rem}.study-hub__meta-subtle{color:var(--muted);font-size:.88rem}.study-hub__first-visit{margin-bottom:1.25rem}.study-hub__first-visit-title{color:var(--text);letter-spacing:-.02em;margin:0;font-size:1.15rem;font-weight:700}.study-hub__returning{gap:1rem;margin-bottom:1.5rem;display:grid}@media (width>=560px){.study-hub__returning{grid-template-columns:1fr 1fr;align-items:start}}.study-hub__mastery{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1rem 1.1rem}.study-hub__mastery-head{justify-content:space-between;align-items:baseline;margin-bottom:.5rem;display:flex}.study-hub__mastery-label{text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-size:.8rem;font-weight:700}.study-hub__mastery-value{color:var(--text);font-size:1.25rem;font-weight:800}.study-hub__mastery-bar{background:#ffffff14;border-radius:999px;height:8px;overflow:hidden}.study-hub__mastery-bar-fill{background:linear-gradient(90deg, var(--blue), var(--blue-lt));border-radius:999px;height:100%;transition:width .35s}.study-hub__mastery-hint{color:var(--muted);margin:.5rem 0 0;font-size:.78rem;line-height:1.35}.study-hub__last-session{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1rem 1.1rem}.study-hub__last-session-title{text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:0 0 .35rem;font-size:.8rem;font-weight:700}.study-hub__last-session-body{color:var(--text);margin:0;font-size:.95rem;line-height:1.45}.study-hub__last-session-time{color:var(--muted);font-size:.85rem}.study-hub__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;display:grid}@media (width<=520px){.study-hub__grid{grid-template-columns:1fr}}.study-hub__tile-wrap{min-width:0}.study-hub__tile-wrap--tooltip{padding-top:.25rem;position:relative}.study-hub__tooltip{z-index:3;color:#f8fafc;text-align:center;cursor:pointer;width:max-content;max-width:min(18rem,92vw);font:inherit;background:#1e3a5f;border:none;border-radius:10px;margin:0;padding:.65rem .85rem;position:absolute;bottom:calc(100% + 6px);left:50%;transform:translate(-50%);box-shadow:0 8px 24px #0f172a40}.study-hub__tooltip:after{content:"";border:7px solid #0000;border-top-color:#1e3a5f;margin-left:-7px;position:absolute;top:100%;left:50%}.study-hub__tooltip-text{font-size:.88rem;font-weight:600;line-height:1.35;display:block}.study-hub__tooltip-dismiss{opacity:.85;margin-top:.35rem;font-size:.72rem;font-weight:500;display:block}.study-hub__tooltip--pulse{animation:1.6s ease-in-out infinite study-hub-tooltip-pulse}@keyframes study-hub-tooltip-pulse{0%,to{transform:translate(-50%)scale(1);box-shadow:0 8px 24px #0f172a40}50%{transform:translate(-50%)scale(1.03);box-shadow:0 10px 28px #2563eb59}}.study-hub__tile{background:var(--surface);border:1px solid var(--border);color:var(--text);border-left-width:4px;border-radius:12px;padding:1.25rem;text-decoration:none;transition:border-color .15s,box-shadow .15s;display:block}.study-hub__tile--accent-blue{border-left-color:var(--blue);background:linear-gradient(90deg, var(--blue-dim), transparent 60%)}.study-hub__tile--accent-coral{border-left-color:var(--coral);background:linear-gradient(90deg, var(--coral-dim), transparent 60%)}.study-hub__tile--accent-teal{border-left-color:var(--teal);background:linear-gradient(90deg, var(--teal-dim), transparent 60%)}.study-hub__tile--accent-purple{border-left-color:var(--purple);background:linear-gradient(90deg, var(--purple-dim), transparent 60%)}.study-hub__tile--accent-blue:hover{border-color:var(--blue-border);box-shadow:0 4px 14px #2b5ce640}.study-hub__tile--accent-coral:hover{border-color:var(--coral-border);box-shadow:0 4px 14px #e8441a38}.study-hub__tile--accent-teal:hover{border-color:var(--teal-border);box-shadow:0 4px 14px #0ba88f38}.study-hub__tile--accent-purple:hover{border-color:var(--purple-border);box-shadow:0 4px 14px #7c3aed38}.study-hub__tile-title{color:var(--text);margin:0 0 .35rem;font-size:1.1rem}.study-hub__tile-count{color:var(--muted);margin:0 0 .35rem;font-size:.85rem;font-weight:600}.study-hub__tile--disabled{opacity:.5;cursor:not-allowed}.study-hub__tile--disabled:hover{box-shadow:none}.study-hub__lane{margin:0;font-size:.875rem;font-weight:700}.study-hub__lane--completed{color:#4ade80}.study-hub__lane--failed{color:#f87171}.study-hub__lane--processing{color:#fbbf24}.study-hub__lane--pending{color:var(--muted)}.study-hub__hint{color:var(--muted);margin:.5rem 0 0;font-size:.8rem}.study-tool{max-width:40rem}.study-tool--wide{max-width:56rem}.study-tool__nav{margin-bottom:1rem;font-size:.9rem}.study-tool__progress{color:var(--muted);font-size:.9rem}.study-tool__hint{color:var(--muted);font-size:.875rem}.flashcard{cursor:pointer;touch-action:manipulation;width:100%;max-width:28rem;font:inherit;text-align:center;background:0 0;border:none;margin:1rem auto;padding:0;display:block}.flashcard__inner{width:100%;min-height:12rem;display:block;position:relative}.flashcard__face{background:var(--navy-lt);border:1px solid var(--border);color:var(--text);text-align:center;border-radius:12px;justify-content:center;align-items:center;padding:1.25rem;font-size:1.05rem;font-weight:700;transition:opacity .35s,visibility .35s;display:flex;position:absolute;inset:0}.flashcard:not(.flashcard--flipped) .flashcard__face--front{z-index:2;opacity:1;visibility:visible;pointer-events:auto}.flashcard:not(.flashcard--flipped) .flashcard__face--back,.flashcard--flipped .flashcard__face--front{z-index:1;opacity:0;visibility:hidden;pointer-events:none}.flashcard--flipped .flashcard__face--back{z-index:2;opacity:1;visibility:visible;pointer-events:auto}.fsrs-row{grid-template-columns:repeat(4,minmax(0,1fr));gap:.5rem;max-width:28rem;margin-top:1.25rem;margin-left:auto;margin-right:auto;display:grid}.fsrs-row__label{color:var(--muted);grid-column:1/-1;margin:0;font-size:.875rem}.fsrs-btn{border:1px solid var(--border);background:var(--surface);min-height:2.75rem;color:var(--text);cursor:pointer;font:inherit;border-radius:8px;padding:.5rem .65rem;font-size:.9375rem;font-weight:700;transition:background .12s,border-color .12s}@media (width<=520px){.fsrs-row{grid-template-columns:repeat(2,minmax(0,1fr))}}.fsrs-btn:hover{border-color:var(--blue-border);background:#ffffff17}.fsrs-btn--again{border-left:3px solid var(--coral)}.fsrs-btn--hard{border-left:3px solid #fbbf24}.fsrs-btn--good{border-left:3px solid var(--teal)}.fsrs-btn--easy{border-left:3px solid var(--blue-lt)}.quiz-mode-pick{flex-direction:column;gap:.75rem;max-width:24rem;display:flex}.quiz-mode-pick button{border-radius:var(--r-sm);border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;font:inherit;text-align:left;justify-content:space-between;align-items:center;padding:1rem 1.1rem;font-size:.975rem;font-weight:700;transition:background .12s,border-color .12s;display:flex}.quiz-mode-pick button:hover{border-color:var(--blue-border);background:#ffffff17}.quiz-question__text{color:var(--text);margin:.5rem 0 1rem;font-size:1.05rem;font-weight:700}.quiz-options{flex-direction:column;gap:.5rem;display:flex}.quiz-option{text-align:left;border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;font:inherit;border-radius:8px;padding:.75rem 1rem;font-size:.95rem;font-weight:600;transition:background .12s,border-color .12s}.quiz-option:hover:not(:disabled){border-color:var(--blue-border);background:var(--blue-dim)}.quiz-option:disabled{cursor:default}.quiz-option--picked{border-color:var(--blue-border);background:var(--blue-dim)}.quiz-option--locked{border-color:var(--border);opacity:.6;background:#ffffff0a}.quiz-locked-hint{color:var(--muted);margin:.75rem 0 0;font-size:.875rem}.quiz-actions{margin-top:1rem}.quiz-actions button{background:var(--blue);color:#fff;cursor:pointer;font:inherit;border:none;border-radius:8px;padding:.6rem 1.25rem;font-size:.95rem;font-weight:700;transition:background .12s}.quiz-actions button:hover:not(:disabled){background:var(--blue-lt)}.quiz-actions button:disabled{opacity:.5;cursor:not-allowed}.quiz-score{font-size:1.1rem}.quiz-results{margin:1rem 0;padding:0;list-style:none}.quiz-results li{background:#fff;border:1px solid #e2e8f0;border-radius:8px;margin-bottom:.5rem;padding:.75rem}.quiz-results__ok{border-left:4px solid #15803d}.quiz-results__bad{border-left:4px solid #b91c1c}.quiz-results__expl{color:#475569;margin:.5rem 0 0;font-size:.9rem}.session-done{text-align:center;padding-top:1rem}.session-done__icon{color:#15803d;background:#dcfce7;border-radius:50%;justify-content:center;align-items:center;width:4rem;height:4rem;margin-bottom:.75rem;font-size:1.75rem;font-weight:700;display:inline-flex}.session-done__title{margin:0 0 1.5rem;font-size:1.5rem}.session-done__stats{justify-content:center;gap:1.5rem;margin-bottom:1.25rem;display:flex}.session-done__stat{border:1px solid #e2e8f0;border-radius:12px;flex-direction:column;align-items:center;gap:.25rem;min-width:6rem;padding:.75rem 1rem;display:flex}.session-done__stat--good{background:#f0fdf4;border-color:#bbf7d0}.session-done__stat--learning{background:#fff7f5;border-color:#fecaca}.session-done__stat-count{font-size:2rem;font-weight:700;line-height:1}.session-done__stat--good .session-done__stat-count{color:#15803d}.session-done__stat--learning .session-done__stat-count{color:#e53e3e}.session-done__stat-label{color:#64748b;font-size:.8rem;font-weight:500}.session-done__message{color:#475569;max-width:24rem;margin:0 auto .75rem;font-size:.95rem}.session-done__message--perfect{color:#15803d;font-weight:500}.session-done__streak,.session-done__first{color:#475569;max-width:24rem;margin:0 auto .5rem;font-size:.9rem}.session-done__actions{flex-direction:column;gap:.625rem;max-width:16rem;margin:1.5rem auto 0;display:flex}.session-done__btn{font-size:1rem;font:inherit;cursor:pointer;text-align:center;border:none;border-radius:10px;padding:.7rem 1rem;text-decoration:none;display:block}.session-done__btn--primary{color:#fff;background:#2563eb}.session-done__btn--primary:hover{background:#1d4ed8}.session-done__btn--secondary{color:#2563eb;background:0 0;border:1px solid #93c5fd}.session-done__btn--secondary:hover{background:#eff6ff}main.landing-page,main.landing-page *{box-sizing:border-box}main.lp{--lp-max:72rem;--lp-gutter:1.25rem;background:var(--navy);width:100%;max-width:none;color:var(--text);font-family:var(--font);margin:0;padding:0}.lp__skip{background:var(--text);color:var(--navy);z-index:100;border-radius:0 0 8px 8px;padding:.5rem 1rem;font-weight:700;text-decoration:none;transition:transform .15s;position:absolute;top:0;left:1rem;transform:translateY(-120%)}.lp__skip:focus-visible{outline:3px solid var(--blue-lt);outline-offset:2px;transform:translateY(0)}.lp__inner{width:100%;max-width:var(--lp-max);padding-inline:var(--lp-gutter);margin-inline:auto}@media (width>=768px){.lp__inner{padding-inline:2.5rem}}.lp__header{z-index:50;-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);background:#0a1634e6;position:sticky;top:0}.lp__header-inner{justify-content:space-between;align-items:center;min-height:3.5rem;padding-block:.625rem;display:flex}.lp__logo{color:var(--text);letter-spacing:-.01em;font-size:1.125rem;font-weight:800;text-decoration:none}.lp__logo:hover{color:var(--blue-lt)}.lp__nav-list{align-items:center;gap:.5rem 1.25rem;margin:0;padding:0;list-style:none;display:flex}.lp__nav-link{color:var(--muted);border-radius:6px;padding:.35rem .5rem;font-size:.9375rem;font-weight:600;text-decoration:none;transition:color .15s}.lp__nav-link:hover{color:var(--text)}.lp__nav-cta{background:var(--blue);color:#fff;border-radius:8px;align-items:center;padding:.45rem 1rem;font-size:.9375rem;font-weight:700;text-decoration:none;transition:filter .15s;display:inline-flex}.lp__nav-cta:hover{filter:brightness(1.12);color:#fff}.lp__hero{background:radial-gradient(ellipse 80% 60% at 50% 0%, #2563eb2e 0%, transparent 70%), var(--navy);border-bottom:1px solid var(--border);padding:4.5rem 0 3.5rem}.lp__hero-inner{grid-template-columns:1fr;align-items:center;gap:3rem;display:grid}@media (width>=1200px){.lp__hero-inner{grid-template-columns:3fr 2fr;gap:3.5rem;padding-block:2rem}}.lp__hero-copy{flex-direction:column;align-items:flex-start;gap:1.5rem;display:flex}.lp__hero-eyebrow{gap:.5rem;display:flex}.lp__pill{background:var(--blue-dim);border:1px solid var(--blue-border);color:var(--blue-lt);letter-spacing:.01em;border-radius:999px;align-items:center;gap:.4rem;padding:.3rem .75rem;font-size:.8125rem;font-weight:700;display:inline-flex}.lp__hero-h1{letter-spacing:-.025em;color:var(--text);margin:0;font-size:clamp(2rem,5vw,2.75rem);font-weight:800;line-height:1.15}@media (width>=1200px){.lp__hero-h1{font-size:clamp(2.5rem,3.5vw,3.25rem)}}.lp__hero-accent{color:var(--blue-lt)}.lp__hero-sub{color:var(--muted);max-width:38rem;margin:0;font-size:1.0625rem;line-height:1.65}.lp__hero-actions{flex-wrap:wrap;align-items:center;gap:.75rem;display:flex}.lp__hero-visual{flex-direction:column;gap:.875rem;display:none;position:relative}@media (width>=1200px){.lp__hero-visual{display:flex}}.lp__hv-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:1rem 1.125rem;transition:transform .2s}.lp__hv-card:hover{transform:translateY(-2px)}.lp__hv-card--quiz{margin-left:.75rem}.lp__hv-card--diag{margin-left:.375rem}.lp__hv-card-header{margin-bottom:.75rem}.lp__hv-badge{border-radius:6px;align-items:center;gap:.35rem;padding:.25rem .625rem;font-size:.75rem;font-weight:700;display:inline-flex}.lp__hv-badge svg{width:13px;height:13px}.lp__hv-badge--blue{background:var(--blue-dim);border:1px solid var(--blue-border);color:var(--blue-lt)}.lp__hv-badge--coral{background:var(--coral-dim);border:1px solid var(--coral-border);color:var(--coral)}.lp__hv-badge--purple{background:var(--purple-dim);border:1px solid var(--purple-border);color:var(--purple)}.lp__hv-fc-row{grid-template-columns:1fr 1fr;gap:.5rem;display:grid}.lp__hv-fc-face{background:var(--navy);border:1px solid var(--border);border-radius:8px;padding:.625rem .75rem}.lp__hv-fc-face--back{background:color-mix(in srgb, var(--teal) 8%, var(--navy));border-color:var(--teal-border)}.lp__hv-tag{text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:0 0 .3rem;font-size:.625rem;font-weight:800}.lp__hv-term{color:var(--text);margin:0;font-size:.8rem;font-weight:700}.lp__hv-def{color:var(--text);margin:0;font-size:.75rem;line-height:1.45}.lp__hv-question{color:var(--text);margin:0 0 .5rem;font-size:.8125rem;font-weight:600;line-height:1.4}.lp__hv-opts{flex-direction:column;gap:.3rem;margin:0;padding:0;list-style:none;display:flex}.lp__hv-opt{border:1px solid var(--border);background:var(--navy);color:var(--muted);border-radius:6px;align-items:center;gap:.45rem;padding:.35rem .6rem;font-size:.775rem;display:flex}.lp__hv-opt--correct{border-color:var(--coral-border);background:var(--coral-dim);color:var(--text);font-weight:600}.lp__hv-marker{background:var(--border);width:1.125rem;height:1.125rem;color:var(--muted);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:.625rem;font-weight:700;display:inline-flex}.lp__hv-opt--correct .lp__hv-marker{background:var(--coral);color:#fff}.lp__hv-check{color:var(--coral);margin-left:auto;font-size:.75rem;font-weight:700}.lp__hv-svg{background:#1a2a4e;border-radius:6px;width:100%;height:auto;display:block}.lp__btn{font-size:1rem;font-weight:700;font-family:var(--font);cursor:pointer;border:2px solid #0000;border-radius:10px;justify-content:center;align-items:center;min-height:44px;padding:.65rem 1.5rem;text-decoration:none;transition:filter .15s,background .15s,border-color .15s,color .15s;display:inline-flex}.lp__btn--primary{background:var(--blue);color:#fff;border-color:var(--blue)}.lp__btn--primary:hover{filter:brightness(1.15);color:#fff}.lp__btn--ghost{color:var(--text);border-color:var(--border);background:0 0}.lp__btn--ghost:hover{background:var(--surface);border-color:var(--muted)}.lp__btn--lg{min-height:52px;padding:.85rem 2.25rem;font-size:1.0625rem}.lp__tool-badges{flex-wrap:wrap;gap:.5rem;margin-top:.25rem;display:flex}.lp__tool-badge{border-radius:8px;align-items:center;gap:.4rem;padding:.35rem .8rem;font-size:.8125rem;font-weight:600;display:inline-flex}.lp__tool-badge svg{flex-shrink:0;width:15px;height:15px}.lp__section-h{letter-spacing:-.02em;color:var(--text);margin:0 0 .5rem;font-size:clamp(1.5rem,3.5vw,2.1rem);font-weight:800}@media (width>=1024px){.lp__section-h{font-size:2.25rem}}.lp__section-sub{color:var(--muted);max-width:40rem;margin:0 0 2.5rem;font-size:1.0625rem;line-height:1.55}.lp__steps{border-bottom:1px solid var(--border);padding:5rem 0}.lp__steps-grid{grid-template-columns:1fr;gap:2.5rem;margin-top:3rem;display:grid}@media (width>=640px){.lp__steps-grid{grid-template-columns:repeat(3,1fr);gap:3rem}}.lp__step{flex-direction:column;gap:.6rem;display:flex;position:relative}@media (width>=640px){.lp__step:not(:last-child):after{content:"";background:var(--border);width:3rem;height:1px;position:absolute;top:1.5rem;right:-1.5rem}}.lp__step-num{color:var(--border);letter-spacing:-.04em;font-variant-numeric:tabular-nums;font-size:2.5rem;font-weight:900;line-height:1}.lp__step-icon{color:var(--blue-lt);margin-top:.25rem;display:flex}.lp__step-title{color:var(--text);margin:.25rem 0 0;font-size:1.0625rem;font-weight:700}.lp__step-desc{color:var(--muted);margin:0;font-size:.9375rem;line-height:1.6}.lp__tools{border-bottom:1px solid var(--border);padding:5rem 0}.lp__tools-grid{grid-template-columns:1fr;gap:1rem;display:grid}@media (width>=640px){.lp__tools-grid{grid-template-columns:repeat(2,1fr)}}@media (width>=1024px){.lp__tools-grid{grid-template-columns:repeat(4,1fr);gap:1.25rem}}.lp__tool-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);flex-direction:column;gap:.75rem;padding:1.5rem;transition:border-color .2s,transform .2s;display:flex}.lp__tool-card:hover{border-color:var(--tool-border);transform:translateY(-2px)}.lp__tool-card-icon{background:var(--tool-dim);width:2.5rem;height:2.5rem;color:var(--tool-color);border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;display:flex}.lp__tool-card-title{color:var(--text);margin:0;font-size:1.0625rem;font-weight:700}.lp__tool-card-desc{color:var(--muted);margin:0;font-size:.875rem;line-height:1.6}.lp__demos{border-bottom:1px solid var(--border);padding:5rem 0}.lp__demos-grid{grid-template-columns:1fr;gap:1.25rem;display:grid}@media (width>=768px){.lp__demos-grid{grid-template-columns:repeat(3,1fr);align-items:start}}.lp__demo-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);margin:0;padding:1.5rem}.lp__demo-card-title{color:var(--text);align-items:center;gap:.6rem;margin:0 0 1.125rem;font-size:1rem;font-weight:700;display:flex}.lp__demo-badge{border-radius:6px;flex-shrink:0;justify-content:center;align-items:center;width:1.875rem;height:1.875rem;display:inline-flex}.lp__demo-badge svg{width:16px;height:16px}.lp__fc{flex-direction:column;gap:.625rem;display:flex}.lp__fc-face{border:1px solid var(--border);background:var(--navy);border-radius:8px;flex:1;padding:.875rem}.lp__fc-face--back{background:color-mix(in srgb, var(--teal) 8%, var(--navy));border-color:var(--teal-border)}.lp__fc-label{text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:0 0 .35rem;font-size:.7rem;font-weight:700}.lp__fc-term{color:var(--text);margin:0;font-size:1.05rem;font-weight:700}.lp__fc-def{color:var(--text);margin:0;font-size:.875rem;line-height:1.5}.lp__mcq-question{color:var(--text);margin:0 0 .75rem;font-size:.9375rem;font-weight:600;line-height:1.45}.lp__mcq-opts{flex-direction:column;gap:.45rem;margin:0;padding:0;list-style:none;display:flex}.lp__mcq-opt{border:1px solid var(--border);background:var(--navy);color:var(--text);border-radius:8px;align-items:center;gap:.6rem;padding:.5rem .75rem;font-size:.875rem;display:flex}.lp__mcq-opt--correct{border-color:var(--coral-border);background:var(--coral-dim)}.lp__mcq-marker{background:var(--border);width:1.375rem;height:1.375rem;color:var(--muted);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:.7rem;font-weight:700;display:inline-flex}.lp__mcq-opt--correct .lp__mcq-marker{background:var(--coral);color:#fff}.lp__diagram-fig{margin:0}.lp__diagram-svg{border:1px solid var(--border);border-radius:8px;width:100%;height:auto;display:block}.lp__diagram-caption{color:var(--muted);margin:.625rem 0 0;font-size:.8125rem;line-height:1.5}.lp__cta{border-bottom:1px solid var(--border);background:radial-gradient(70% 80%,#2563eb24 0%,#0000 70%);padding:6rem 0}.lp__cta-inner{text-align:center;flex-direction:column;align-items:center;gap:1.25rem;display:flex}.lp__cta-h{letter-spacing:-.025em;color:var(--text);margin:0;font-size:clamp(1.75rem,4vw,2.75rem);font-weight:800}.lp__cta-sub{color:var(--muted);margin:0;font-size:1.0625rem}.lp__footer{padding:2rem 0}.lp__footer-inner{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.75rem;display:flex}.lp__footer-brand{color:var(--muted);margin:0;font-size:.9375rem;font-weight:800}.lp__footer-copy{color:var(--muted);margin:0;font-size:.8125rem}.lp a:focus-visible,.lp__btn:focus-visible{outline:2px solid var(--blue-lt);outline-offset:2px}.onboarding-wizard{width:100%;max-width:480px;min-height:100dvh;margin-left:auto;margin-right:auto}.onboarding-step-indicator{color:#64748b;margin:0 0 .5rem;font-size:.875rem}.onboarding-profile-page h1,.onboarding-subjects-page h1,.onboarding-upload-page h1{margin-top:0}.onboarding-upload-form-wrap{max-width:40rem;margin-top:1.25rem}.onboarding-upload-form-wrap .upload-section h2{margin:0 0 .5rem;font-size:1rem}.onboarding-upload-course-field{margin-top:.75rem}.onboarding-upload-course-field label{color:#334155;margin-bottom:.35rem;font-size:.9rem;display:block}.onboarding-upload-course-field input{box-sizing:border-box;border:1px solid #cbd5e1;border-radius:8px;width:100%;max-width:22rem;padding:.5rem .55rem;font-size:1rem}.onboarding-upload-suggestions{flex-wrap:wrap;gap:.4rem;max-width:36rem;margin-top:.65rem;display:flex}.onboarding-upload-suggestion-chip{color:#475569;cursor:pointer;background:#e2e8f0;border:1px solid #cbd5e1;border-radius:9999px;min-height:36px;padding:.35rem .75rem;font-size:.85rem}.onboarding-upload-suggestion-chip:hover:not(:disabled){background:#f1f5f9;border-color:#94a3b8}.onboarding-upload-suggestion-chip:disabled{opacity:.65;cursor:default}.onboarding-upload-suggestion-chip:focus-visible{outline-offset:2px;outline:2px solid #2563eb}.onboarding-upload-demo-row{margin-top:1rem;font-size:.95rem}.onboarding-sublead{color:var(--muted);margin:0;font-size:14px;font-weight:600;line-height:1.5}.onboarding-subjects-field-label{text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0 0 10px;font-size:11px;font-weight:800;display:block}.onboarding-subject-chips{flex-wrap:wrap;gap:8px;display:flex}.onboarding-subject-chip{box-sizing:border-box;border:1px solid var(--border-md);color:#ffffffa6;white-space:nowrap;cursor:pointer;height:44px;font-size:13px;font-weight:800;font-family:var(--font);background:#ffffff14;border-radius:9999px;justify-content:center;align-items:center;gap:6px;padding:0 16px;display:inline-flex}.onboarding-subject-chip.is-selected{background:var(--blue-dim);border-color:var(--blue-border);color:var(--blue-lt)}.onboarding-subject-chip-check{color:var(--blue-lt);flex-shrink:0;font-weight:800;line-height:1}.onboarding-subject-chip:disabled{opacity:.65;cursor:default}.onboarding-subject-chip:focus-visible{outline:2px solid var(--blue);outline-offset:2px}.onboarding-subjects-actions{margin-top:24px}.onboarding-profile-fields{flex-direction:column;gap:20px;display:flex}.onboarding-profile-fields label,.grade-field-label{color:var(--muted);margin-bottom:6px;font-size:13px;font-weight:800;display:block}.grade-dd{--navy-mid:#1e293b;--border-md:#334155;--surface-md:#0f172a;--blue-dim:#2563eb47;--blue-lt:#93c5fd;position:relative}.grade-dd-trigger{border:1px solid var(--border-md);background:var(--navy-mid);color:#f1f5f9;cursor:pointer;text-align:left;border-radius:8px;justify-content:space-between;align-items:center;gap:.5rem;width:100%;padding:.55rem .65rem;font-size:1rem;display:flex}.grade-dd-trigger:disabled{opacity:.6;cursor:default}.grade-dd-trigger:focus-visible{outline-offset:2px;outline:2px solid #3b82f6}.grade-dd-panel{z-index:40;background:var(--surface-md);border:1px solid var(--border-md);border-radius:10px;max-height:min(50vh,280px);position:absolute;top:calc(100% + 4px);left:0;right:0;overflow-y:auto;box-shadow:0 12px 32px #00000059}@media (width<=767px){.grade-dd-panel{border-bottom:none;border-radius:16px 16px 0 0;max-height:55vh;position:fixed;inset:auto 0 0}}.grade-dd-list{margin:0;padding:.35rem 0;list-style:none}.grade-dd-option{color:#e2e8f0;text-align:left;cursor:pointer;background:0 0;border:none;align-items:center;gap:.5rem;width:100%;padding:.65rem .85rem;font-size:.95rem;display:flex}.grade-dd-option:hover{background:#33415580}.grade-dd-option.is-selected{background:var(--blue-dim);color:var(--blue-lt)}.grade-dd-check{color:#60a5fa;flex-shrink:0;width:1.25rem;font-weight:700}.grade-dd-check-spacer{flex-shrink:0;width:1.25rem}.onboarding-profile-actions{flex-direction:column;margin-top:24px;display:flex}.onboarding-continue{color:#fff;cursor:pointer;background:#2563eb;border:1px solid #2563eb;border-radius:8px;padding:.55rem 1.25rem;font-size:1rem}.onboarding-continue:disabled{opacity:.65;cursor:default}.onboarding-skip-link{text-align:center;width:100%;color:var(--muted);font-size:13px;font-weight:700;font-family:var(--font);cursor:pointer;background:0 0;border:none;margin-top:12px;padding:0;display:block}.onboarding-skip-link:disabled{opacity:.6;cursor:default}.onboarding-skip-now{text-align:center;width:100%;color:var(--muted);font-size:13px;font-weight:700;font-family:var(--font);cursor:pointer;background:0 0;border:none;margin-top:4px;padding:0;display:block}.onboarding-skip-now:disabled{opacity:.6;cursor:default}:root{--sh-bg:#0d1b3e;--sh-bg2:#162348;--sh-bg3:#1e2f56;--sh-border:#ffffff14;--sh-text:#e8edf8;--sh-muted:#89b;--sh-primary:#2b5ce6;--sh-primary-hover:#3b6cf6;--sh-amber:#f59e0b;--sh-amber-bg:#f59e0b26;--sh-green:#10b981;--sh-green-bg:#10b98126;--sh-accent-blue:#2b5ce6;--sh-accent-teal:#0d9488;--sh-accent-purple:#7c3aed;--sh-accent-coral:#ea580c;--sh-nav-height:72px;--sh-bottom-nav-slot:calc(var(--sh-nav-height) + max(20px, env(safe-area-inset-bottom,0px)))}.sh-shell{display:contents}.student-app-shell{box-sizing:border-box;flex-direction:column;width:100%;min-height:100dvh;display:flex}main.sh-page{background:var(--sh-bg);width:100%;max-width:none;min-height:100dvh;color:var(--sh-text);box-sizing:border-box;margin:0;padding:0;font-family:system-ui,sans-serif}.student-app-shell>main.sh-page{flex-direction:column;flex:auto;min-height:0;display:flex}.sh-scroll{-webkit-overflow-scrolling:touch;width:100%;max-width:480px;min-height:0;padding-left:max(1.5rem, env(safe-area-inset-left,0px));padding-right:max(1.5rem, env(safe-area-inset-right,0px));box-sizing:border-box;flex:auto;margin:0 auto;padding-bottom:1.75rem;overflow-y:auto}.student-app-shell main.sh-page>.sh-scroll{padding-bottom:calc(var(--sh-bottom-nav-slot) + 1rem)}main.sh-page.sh-page--no-nav>.sh-scroll{padding-bottom:max(2rem, env(safe-area-inset-bottom,0px) + 1.5rem)}.sh-header{box-sizing:border-box;width:100%;max-width:480px;padding-top:max(1rem, env(safe-area-inset-top,0px));padding-left:max(1.5rem, env(safe-area-inset-left,0px));padding-right:max(1.5rem, env(safe-area-inset-right,0px));align-items:center;gap:.75rem;margin:0 auto;padding-bottom:0;display:flex}.sh-logo{color:var(--sh-text);flex:1;margin:0;font-family:Nunito,system-ui,sans-serif;font-size:1.1rem;font-weight:900;text-decoration:none}.sh-streak-pill{background:var(--sh-amber-bg);color:var(--sh-amber);border:1px solid #f59e0b4d;border-radius:9999px;flex-shrink:0;align-items:center;gap:.3rem;padding:.3rem .7rem;font-family:Nunito,system-ui,sans-serif;font-size:.8rem;font-weight:800;display:inline-flex}.sh-avatar{background:var(--sh-primary);color:#fff;letter-spacing:.03em;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:38px;min-width:38px;height:38px;font-family:Nunito,system-ui,sans-serif;font-size:.85rem;font-weight:900;display:flex}.sh-greeting-block{padding:1.5rem 0 .5rem}.sh-greeting-h1{color:var(--sh-text);margin:0 0 .4rem;font-family:Nunito,system-ui,sans-serif;font-size:1.75rem;font-weight:900;line-height:1.2}.sh-greeting-sub{color:var(--sh-muted);margin:0;font-size:.875rem;line-height:1.5}.sh-hero{background:var(--sh-hero-accent,var(--sh-primary));color:#fff;border-radius:16px;min-height:44px;margin:1.25rem 0 0;padding:1.35rem 1.25rem;text-decoration:none;display:block;position:relative;overflow:hidden}.sh-hero:before{content:"";pointer-events:none;background:linear-gradient(135deg,#ffffff1a 0%,#0000 60%);position:absolute;inset:0}.sh-hero__eyebrow{text-transform:uppercase;letter-spacing:.08em;opacity:.75;margin:0 0 .45rem;font-family:Nunito,system-ui,sans-serif;font-size:.7rem;font-weight:800}.sh-hero__course{opacity:.85;margin:0 0 .2rem;font-size:.8rem}.sh-hero__name{margin:0 0 1rem;font-family:Nunito,system-ui,sans-serif;font-size:1.2rem;font-weight:900;line-height:1.25}.sh-hero__cta{background:#ffffff38;border-radius:10px;align-items:center;gap:.4rem;min-height:44px;padding:.6rem 1.2rem;font-family:Nunito,system-ui,sans-serif;font-size:.95rem;font-weight:900;transition:background .15s;display:inline-flex}.sh-hero:hover .sh-hero__cta,.sh-hero:focus-visible .sh-hero__cta{background:#ffffff4d}.sh-hero__cta-arrow{font-size:1.1rem}.sh-section-hdr{justify-content:space-between;align-items:baseline;gap:.5rem;margin:2rem 0 .85rem;display:flex}.sh-section-hdr h2{color:var(--sh-text);margin:0;font-family:Nunito,system-ui,sans-serif;font-size:1rem;font-weight:900}.sh-section-link{color:var(--sh-primary);white-space:nowrap;flex-shrink:0;font-size:.8rem;text-decoration:none}.sh-section-link:hover{color:var(--sh-primary-hover);text-decoration:underline}.sh-course-card{background:var(--sh-bg2);border:1px solid var(--sh-border);color:var(--sh-text);box-sizing:border-box;border-radius:14px;align-items:center;gap:1rem;min-height:44px;margin-bottom:.65rem;padding:1rem 1.1rem;text-decoration:none;transition:background .15s,border-color .15s;display:flex}.sh-course-card:hover,.sh-course-card:focus-visible{background:var(--sh-bg3);border-color:#ffffff24}.sh-course-icon{color:#fff;border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;width:44px;min-width:44px;height:44px;font-family:Nunito,system-ui,sans-serif;font-size:1rem;font-weight:900;display:flex}.sh-course-info{flex:1;min-width:0}.sh-course-name{color:var(--sh-text);white-space:nowrap;text-overflow:ellipsis;margin:0 0 .2rem;font-family:Nunito,system-ui,sans-serif;font-size:.95rem;font-weight:800;overflow:hidden}.sh-course-meta{color:var(--sh-muted);margin:0;font-size:.8rem}.sh-course-chevron{color:var(--sh-muted);flex-shrink:0;font-size:1rem}.sh-demo-chip{background:var(--sh-amber-bg);color:var(--sh-amber);border:1px solid #f59e0b4d;border-radius:9999px;flex-shrink:0;align-items:center;padding:.15rem .5rem;font-size:.7rem;font-weight:700;display:inline-flex}.sh-fab{background:var(--sh-primary);color:#fff;box-sizing:border-box;border:none;border-radius:14px;justify-content:center;align-items:center;gap:.5rem;width:100%;min-height:56px;margin-top:2rem;padding:.95rem 1.25rem;font-family:Nunito,system-ui,sans-serif;font-size:1rem;font-weight:900;text-decoration:none;transition:background .15s;display:flex}.sh-fab:hover,.sh-fab:focus-visible{background:var(--sh-primary-hover)}.sh-due-strip{scrollbar-width:none;-ms-overflow-style:none;gap:.65rem;padding-bottom:.5rem;display:flex;overflow-x:auto}.sh-due-strip::-webkit-scrollbar{display:none}.sh-due-pill{background:var(--sh-bg2);border:1px solid var(--sh-border);box-sizing:border-box;border-radius:12px;flex-direction:column;flex-shrink:0;gap:.2rem;min-width:120px;min-height:44px;padding:.65rem .9rem;text-decoration:none;transition:background .15s,border-color .15s;display:flex}.sh-due-pill:hover,.sh-due-pill:focus-visible{background:var(--sh-bg3);border-color:#ffffff24}.sh-due-pill__name{color:var(--sh-text);white-space:nowrap;text-overflow:ellipsis;max-width:160px;font-family:Nunito,system-ui,sans-serif;font-size:.8rem;font-weight:800;overflow:hidden}.sh-due-pill__count{color:var(--sh-amber);font-size:.75rem;font-weight:700}.sh-muted-text{color:var(--sh-muted);margin:.75rem 0;font-size:.875rem}.sh-bottom-nav{background:var(--sh-bg2);border-top:1px solid var(--sh-border);z-index:200;box-sizing:border-box;width:100%;max-width:480px;padding-left:max(0px, env(safe-area-inset-left,0px));padding-right:max(0px, env(safe-area-inset-right,0px));align-items:flex-start;margin-left:auto;margin-right:auto;padding-top:6px;display:flex;position:fixed;bottom:0;left:0;right:0}.sh-bottom-nav__item{color:var(--sh-muted);height:var(--sh-nav-height);-webkit-tap-highlight-color:transparent;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:.25rem;min-height:44px;padding:.5rem .25rem;font-family:Nunito,system-ui,sans-serif;font-size:.7rem;font-weight:800;text-decoration:none;transition:color .15s;display:flex}.sh-bottom-nav__item:hover{color:var(--sh-text)}.sh-bottom-nav__item--active{color:var(--sh-primary)}.sh-bottom-nav__icon{flex-shrink:0;width:22px;height:22px}.sh-shell-wrapped.dashboard-page .dashboard-inner,.sh-shell-wrapped main .dashboard-inner{padding-bottom:calc(var(--sh-bottom-nav-slot) + 2rem)}main.dashboard-page{background:#f8fafc;width:100%;max-width:none;min-height:100vh;margin:0;padding:0}.dashboard-header{background:#fff;border-bottom:1px solid #e2e8f0;flex-wrap:wrap;align-items:center;gap:1rem 1.5rem;padding:1rem 1.25rem;display:flex}.dashboard-logo{margin:0;font-size:1.1rem;font-weight:700}.dashboard-logo-link{color:#0f172a;text-decoration:none}.dashboard-logo-link:hover{text-decoration:underline}.dashboard-nav{flex-wrap:wrap;gap:1rem;display:flex}.dashboard-nav-link{color:#2563eb;font-size:.95rem}.dashboard-user{flex-wrap:wrap;align-items:center;gap:.65rem 1rem;margin-left:auto;font-size:.875rem;display:flex}.dashboard-user-email{color:#475569;text-overflow:ellipsis;max-width:14rem;overflow:hidden}.dashboard-tier{text-transform:capitalize;color:#64748b}.dashboard-logout{cursor:pointer;background:#fff;border:1px solid #cbd5e1;border-radius:6px;padding:.35rem .65rem;font-size:.875rem}.dashboard-inner{max-width:48rem;margin:0 auto;padding:1.75rem 1.25rem 3rem}.dashboard-title{margin:0 0 1.25rem;font-size:1.75rem}.dashboard-section-title{color:#334155;margin:0 0 .75rem;font-size:1.05rem}.dashboard-muted{color:#64748b;margin:.5rem 0}.dashboard-continue{margin-bottom:2rem}.dashboard-continue-card{color:inherit;background:#fff;border:1px solid #e2e8f0;border-radius:12px;flex-wrap:wrap;align-items:center;gap:.75rem 1rem;padding:1.1rem 1.25rem;text-decoration:none;display:flex;box-shadow:0 1px 2px #0f172a0f}.dashboard-continue-card:hover{background:#fafafa;border-color:#cbd5e1}.dashboard-continue-card-main{flex:1;min-width:12rem}.dashboard-continue-label{text-transform:uppercase;letter-spacing:.04em;color:#64748b;margin:0;font-size:.75rem}.dashboard-continue-name{color:#0f172a;margin:.25rem 0 0;font-size:1.15rem;font-weight:600}.dashboard-continue-meta{color:#64748b;margin:.35rem 0 0;font-size:.875rem}.dashboard-continue-chevron{color:#2563eb;font-size:1.25rem}.sample-set-chip{color:#92400e;background:#fbbf2459;border:1px solid #f59e0b8c;border-radius:9999px;flex-shrink:0;align-items:center;padding:.2rem .55rem;font-size:.75rem;font-weight:600;display:inline-flex}.sample-set-chip--sm{padding:.15rem .45rem;font-size:.7rem}.dashboard-empty{margin-bottom:2rem}.dashboard-primary-link{color:#2563eb;margin-top:.5rem;font-weight:600;display:inline-block}.dashboard-set-list{margin:0;padding:0;list-style:none}.dashboard-set-row{border-bottom:1px solid #e2e8f0;flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:.75rem;padding:.85rem 0;display:flex}.dashboard-set-link{color:#1d4ed8;font-weight:600}.dashboard-set-sub{color:#64748b;margin:.25rem 0 0;font-size:.875rem}.dashboard-set-actions{align-items:center;gap:.5rem;display:flex}.dashboard-delete-set{color:#b91c1c;cursor:pointer;background:#fff;border:1px solid #fecaca;border-radius:6px;padding:.35rem .65rem;font-size:.8rem}.dashboard-delete-set:disabled{opacity:.6;cursor:default}.sh-page--no-nav{padding-bottom:2rem}.sh-screen-header{padding-top:max(1rem, env(safe-area-inset-top,0px));padding-left:max(1.5rem, env(safe-area-inset-left,0px));padding-right:max(1.5rem, env(safe-area-inset-right,0px));box-sizing:border-box;align-items:center;gap:.75rem;min-height:56px;padding-bottom:.25rem;display:flex}.sh-back-btn{width:40px;min-width:40px;height:40px;color:var(--sh-text);cursor:pointer;background:#ffffff14;border:none;border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;display:flex}.sh-back-btn:hover{background:#ffffff24}.sh-screen-title{color:var(--sh-text);text-overflow:ellipsis;white-space:nowrap;flex:1;margin:0;font-size:1.125rem;font-weight:900;overflow:hidden}.sh-form-page{padding-top:1rem}.sh-form{flex-direction:column;gap:1.25rem;display:flex}.sh-field{flex-direction:column;gap:.4rem;display:flex}.sh-label{text-transform:uppercase;letter-spacing:.08em;color:var(--sh-muted);font-size:.75rem;font-weight:800}.sh-input{height:52px;color:var(--sh-text);background:#ffffff0f;border:1px solid #ffffff1a;border-radius:12px;outline:none;padding:0 1rem;font-family:inherit;font-size:1rem;font-weight:700;transition:border-color .15s}.sh-input::placeholder{color:var(--sh-muted);font-weight:600}.sh-input:focus{border-color:var(--sh-primary)}.sh-input:disabled{opacity:.5;cursor:not-allowed}.sh-field-error{color:#f87171;margin:0;font-size:.825rem;font-weight:700}.sh-btn{cursor:pointer;white-space:nowrap;border:none;border-radius:14px;justify-content:center;align-items:center;width:100%;height:52px;padding:0 1.5rem;font-family:inherit;font-size:1rem;font-weight:800;text-decoration:none;transition:background .15s,opacity .15s;display:flex}.sh-btn:disabled{opacity:.45;cursor:not-allowed}.sh-btn--primary{background:var(--sh-primary);color:#fff}.sh-btn--primary:hover:not(:disabled){background:var(--sh-primary-hover)}.sh-btn--secondary{color:var(--sh-text);background:#ffffff14;border:1px solid #ffffff1a}.sh-btn--secondary:hover:not(:disabled){background:#ffffff21}.sh-btn--danger{color:#f87171;background:#ef444426;border:1px solid #ef444440}.sh-btn--danger:hover:not(:disabled){background:#ef444440}.sh-btn--sm{width:auto;height:40px;padding:0 1rem;font-size:.875rem}.sh-btn-loading{opacity:.7}.sh-section-label{text-transform:uppercase;letter-spacing:.08em;color:var(--sh-muted);margin:0 0 .75rem;font-size:.7rem;font-weight:800}.sh-empty-state{text-align:center;flex-direction:column;align-items:center;gap:.5rem;padding:3rem 1.5rem;display:flex}.sh-empty-state__icon{margin-bottom:.5rem;font-size:2.5rem;line-height:1}.sh-empty-state__text{color:var(--sh-text);margin:0;font-size:1.125rem;font-weight:900}.sh-empty-state__hint{color:var(--sh-muted);margin:0 0 1rem;font-size:.9rem;font-weight:600}.sh-set-list{flex-direction:column;gap:.5rem;margin:0;padding:0;list-style:none;display:flex}.sh-set-row{color:var(--sh-text);background:#ffffff0d;border:1px solid #ffffff14;border-radius:14px;align-items:center;gap:.75rem;padding:1rem;text-decoration:none;transition:background .15s;display:flex}.sh-set-row:hover{background:#ffffff17}.sh-set-row__info{flex:1;min-width:0}.sh-set-row__name{color:var(--sh-text);text-overflow:ellipsis;white-space:nowrap;margin:0 0 .2rem;font-size:.95rem;font-weight:800;overflow:hidden}.sh-set-row__meta{color:var(--sh-muted);margin:0;font-size:.8rem;font-weight:600}.sh-section-hdr__count{color:var(--sh-muted);font-size:.8rem;font-weight:600}.sh-search-wrap{padding:0 0 .25rem}.sh-search{background:#ffffff12;border:1px solid #ffffff1a;border-radius:14px;align-items:center;gap:.5rem;height:48px;padding:0 1rem;display:flex}.sh-search__icon{color:var(--sh-muted);flex-shrink:0}.sh-search__input{color:var(--sh-text);background:0 0;border:none;outline:none;flex:1;font-family:inherit;font-size:.95rem;font-weight:600}.sh-search__input::placeholder{color:var(--sh-muted)}.sh-search__clear{color:var(--sh-muted);cursor:pointer;background:0 0;border:none;padding:.2rem .3rem;font-size:.85rem}.sh-browse-list{flex-direction:column;gap:.5rem;display:flex}.sh-browse-card{color:var(--sh-text);background:#ffffff0d;border:1px solid #ffffff14;border-radius:16px;align-items:center;gap:.875rem;padding:1rem;text-decoration:none;transition:background .15s;display:flex}.sh-browse-card:hover{background:#ffffff17}.sh-browse-card__icon{color:#fff;border-radius:14px;flex-shrink:0;justify-content:center;align-items:center;width:48px;height:48px;font-size:1.25rem;font-weight:900;display:flex}.sh-browse-card__info{flex:1;min-width:0}.sh-browse-card__name{color:var(--sh-text);text-overflow:ellipsis;white-space:nowrap;margin:0 0 .2rem;font-size:1rem;font-weight:800;overflow:hidden}.sh-browse-card__meta{color:var(--sh-muted);margin:0;font-size:.8rem;font-weight:600}.sh-browse-footer{justify-content:center;padding-top:1rem;display:flex}.sh-browse-footer .sh-btn{width:auto}.sh-progress-stats{grid-template-columns:repeat(3,1fr);gap:.75rem;margin-bottom:1rem;display:grid}.sh-stat-card{background:#ffffff0d;border:1px solid #ffffff14;border-radius:14px;flex-direction:column;align-items:center;gap:.25rem;padding:1rem .5rem;display:flex}.sh-stat-card__value{color:var(--sh-text);font-size:1.75rem;font-weight:900;line-height:1}.sh-stat-card__label{text-transform:uppercase;letter-spacing:.06em;color:var(--sh-muted);text-align:center;font-size:.7rem;font-weight:800}.sh-progress-mastery-card{background:#ffffff0d;border:1px solid #ffffff14;border-radius:16px;margin-bottom:1rem;padding:1.25rem}.sh-progress-mastery-card__head{justify-content:space-between;align-items:baseline;margin-bottom:.75rem;display:flex}.sh-progress-mastery-card__label{text-transform:uppercase;letter-spacing:.06em;color:var(--sh-muted);font-size:.75rem;font-weight:800}.sh-progress-mastery-card__value{color:var(--sh-text);font-size:1.25rem;font-weight:900}.sh-progress-all-clear{text-align:center;flex-direction:column;align-items:center;gap:.5rem;padding:2.5rem 1.5rem;display:flex}.sh-progress-all-clear__icon{color:#10b981;background:#10b98126;border-radius:50%;justify-content:center;align-items:center;width:56px;height:56px;margin-bottom:.5rem;font-size:1.5rem;display:flex}.sh-progress-all-clear__text{color:var(--sh-text);margin:0;font-size:1.125rem;font-weight:900}.sh-settings-section{margin-bottom:1.5rem}.sh-settings-plan-card{background:#ffffff0d;border:1px solid #ffffff14;border-radius:16px;justify-content:space-between;align-items:center;gap:1rem;padding:1.25rem;display:flex}.sh-settings-plan-card__info{flex:1}.sh-settings-plan-card__tier{color:var(--sh-text);margin:0;font-size:1.125rem;font-weight:900}.sh-settings-list{background:#ffffff0d;border:1px solid #ffffff14;border-radius:16px;overflow:hidden}.sh-settings-row{justify-content:space-between;align-items:center;padding:1rem 1.25rem;display:flex}.sh-settings-row+.sh-settings-row{border-top:1px solid #ffffff0f}.sh-settings-row__label{color:var(--sh-text);font-size:.95rem;font-weight:800}.sh-settings-row__value{font-size:.875rem}.sh-upgrade-plans{flex-direction:column;gap:1rem;display:flex}.sh-upgrade-plan{background:#ffffff0d;border:1px solid #ffffff14;border-radius:20px;padding:1.5rem;position:relative}.sh-upgrade-plan--primary{background:#2b5ce61f;border-color:#2b5ce666}.sh-upgrade-plan__badge{background:var(--sh-primary);color:#fff;text-transform:uppercase;letter-spacing:.06em;white-space:nowrap;border-radius:20px;padding:.25rem .75rem;font-size:.7rem;font-weight:800;position:absolute;top:-12px;left:50%;transform:translate(-50%)}.sh-upgrade-plan__header{justify-content:space-between;align-items:baseline;margin-bottom:1.25rem;display:flex}.sh-upgrade-plan__name{color:var(--sh-text);margin:0;font-size:1.125rem;font-weight:900}.sh-upgrade-plan__price{align-items:baseline;gap:.25rem;display:flex}.sh-upgrade-plan__amount{color:var(--sh-text);font-size:1.5rem;font-weight:900}.sh-upgrade-plan__period{color:var(--sh-muted);font-size:.8rem;font-weight:600}.sh-upgrade-plan__features{flex-direction:column;gap:.6rem;margin:0 0 1.25rem;padding:0;list-style:none;display:flex}.sh-upgrade-plan__feature{color:var(--sh-text);align-items:center;gap:.6rem;font-size:.9rem;font-weight:700;display:flex}.sh-upgrade-plan__check{color:#10b981;flex-shrink:0;font-weight:900}.sh-completion{text-align:center;flex-direction:column;align-items:center;gap:1rem;padding-top:3rem;display:flex}.sh-completion__icon{border-radius:50%;justify-content:center;align-items:center;width:72px;height:72px;font-size:2rem;font-weight:900;display:flex}.sh-completion__icon--blue{color:var(--sh-accent-blue);background:#2b5ce633}.sh-completion__title{color:var(--sh-text);margin:0;font-size:1.75rem;font-weight:900}.sh-completion__stats{gap:1.5rem;margin:.5rem 0;display:flex}.sh-completion__stat{border-radius:16px;flex-direction:column;align-items:center;gap:.25rem;min-width:90px;padding:1rem 1.5rem;display:flex}.sh-completion__stat--good{background:#10b9811f}.sh-completion__stat--learning{background:#f59e0b1f}.sh-completion__stat-value{color:var(--sh-text);font-size:2rem;font-weight:900;line-height:1}.sh-completion__stat-label{text-transform:uppercase;letter-spacing:.06em;color:var(--sh-muted);font-size:.75rem;font-weight:800}.sh-completion__message{color:var(--sh-muted);max-width:280px;margin:0;font-size:.95rem;font-weight:700}.sh-completion__message--perfect{color:#10b981}.sh-completion__streak{color:var(--sh-amber);margin:0;font-size:1rem;font-weight:800}.sh-completion__first{color:var(--sh-muted);max-width:260px;margin:0;font-size:.9rem;font-weight:700}.sh-completion__actions{flex-direction:column;gap:.75rem;width:100%;max-width:320px;margin-top:.5rem;display:flex}.sh-completion__score-ring{background:conic-gradient(var(--score-color,var(--sh-primary)) 0deg, #ffffff14 0deg);border-radius:50%;flex-direction:column;justify-content:center;align-items:center;width:120px;height:120px;display:flex;position:relative}.sh-completion__score-ring:before{content:"";background:var(--sh-bg);border-radius:50%;position:absolute;inset:8px}.sh-completion__score-value{color:var(--sh-text);z-index:1;font-size:1.75rem;font-weight:900;line-height:1;position:relative}.sh-completion__score-label{text-transform:uppercase;letter-spacing:.06em;color:var(--sh-muted);z-index:1;font-size:.7rem;font-weight:800;position:relative}.sh-mode-list{flex-direction:column;gap:.75rem;display:flex}.sh-mode-card{color:var(--sh-text);background:#ffffff0d;border:1px solid #ffffff14;border-radius:16px;align-items:center;gap:1rem;padding:1.25rem;text-decoration:none;transition:background .15s;display:flex}.sh-mode-card:hover{background:#ffffff17}.sh-mode-card__dot{border-radius:50%;flex-shrink:0;width:12px;height:12px}.sh-mode-card__info{flex:1}.sh-mode-card__title{color:var(--sh-text);margin:0 0 .2rem;font-size:1rem;font-weight:900}.sh-mode-card__desc{margin:0;font-size:.85rem}:root{--navy:#0d1b3e;--navy-mid:#162348;--navy-lt:#1e2f56;--blue:#2b5ce6;--blue-lt:#4b7bff;--blue-dim:#2b5ce62e;--blue-border:#2b5ce666;--coral:#e8441a;--coral-dim:#e8441a2e;--coral-border:#e8441a66;--teal:#0ba88f;--teal-dim:#0ba88f2e;--teal-border:#0ba88f66;--purple:#7c3aed;--purple-dim:#7c3aed2e;--purple-border:#7c3aed66;--surface:#ffffff0d;--border:#ffffff14;--border-md:#ffffff24;--muted:#8b9ec7;--text:#e8edf8;--amber:#fbbf24;--success-bright:#4ade80;--diagram-canvas:#fff;--font:"Nunito", system-ui, sans-serif;--r:16px;--r-lg:20px;--r-sm:10px;--r-xs:6px}*,:before,:after{box-sizing:border-box}body{font-family:var(--font);background:var(--navy);color:var(--text);-webkit-font-smoothing:antialiased;min-height:100dvh;margin:0}input,textarea,select{caret-color:var(--text);color:var(--text)!important;background-color:#ffffff0f!important}input:-webkit-autofill{caret-color:var(--text);transition:background-color 9999s ease-in-out;-webkit-text-fill-color:var(--text)!important;-webkit-box-shadow:inset 0 0 0 9999px #1a2952!important}input:-webkit-autofill:hover{caret-color:var(--text);transition:background-color 9999s ease-in-out;-webkit-text-fill-color:var(--text)!important;-webkit-box-shadow:inset 0 0 0 9999px #1a2952!important}input:-webkit-autofill:focus{caret-color:var(--text);transition:background-color 9999s ease-in-out;-webkit-text-fill-color:var(--text)!important;-webkit-box-shadow:inset 0 0 0 9999px #1a2952!important}input:-webkit-autofill:active{caret-color:var(--text);transition:background-color 9999s ease-in-out;-webkit-text-fill-color:var(--text)!important;-webkit-box-shadow:inset 0 0 0 9999px #1a2952!important}input:autofill{-webkit-text-fill-color:var(--text)!important;box-shadow:inset 0 0 0 9999px #1a2952!important}#root{min-height:100dvh;position:relative}.screen{width:100%;max-width:480px;padding-left:max(20px, env(safe-area-inset-left,0px));padding-right:max(20px, env(safe-area-inset-right,0px));padding-top:max(20px, env(safe-area-inset-top,0px));padding-bottom:max(28px, env(safe-area-inset-bottom,0px) + 20px);flex-direction:column;gap:16px;margin-left:auto;margin-right:auto;display:flex}.onboarding-wizard>main.screen{padding-left:max(24px, calc(env(safe-area-inset-left,0px) + 16px));padding-right:max(24px, calc(env(safe-area-inset-right,0px) + 16px))}.screen-header{padding:4px 0 8px;padding-top:max(1rem, env(safe-area-inset-top,0px));align-items:center;gap:12px;min-height:48px;display:flex}.screen-header h2{color:var(--text);text-overflow:ellipsis;white-space:nowrap;flex:1;margin:0;font-size:18px;font-weight:900;overflow:hidden}.back-btn{background:var(--surface);border:1px solid var(--border);width:44px;height:44px;color:var(--text);cursor:pointer;border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;padding:0;display:flex}.back-btn:hover{background:#ffffff1a}.section-label{text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0;font-size:11px;font-weight:800}.btn{height:52px;font-family:var(--font);cursor:pointer;white-space:nowrap;border:none;border-radius:14px;justify-content:center;align-items:center;gap:6px;padding:0 20px;font-size:15px;font-weight:800;text-decoration:none;transition:opacity .15s,background .15s;display:flex}.btn:disabled{opacity:.38;cursor:not-allowed}.btn-primary{background:var(--blue);color:#fff}.btn-primary:hover:not(:disabled){background:var(--blue-lt)}.btn-secondary{background:var(--surface);border:1px solid var(--border);color:var(--text)}.btn-secondary:hover:not(:disabled){background:#ffffff17}.btn-danger{background:var(--coral-dim);border:1px solid var(--coral-border);color:#ff6b4a}.btn-sm{height:40px;padding:0 14px;font-size:13px}@keyframes gds-pulse{0%,to{opacity:1}50%{opacity:.45}}@keyframes gds-fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}@keyframes gds-spin{to{transform:rotate(360deg)}}.animate-pulse{animation:1.4s ease-in-out infinite gds-pulse}.animate-fadeIn{animation:.3s ease-out both gds-fadeIn}.animate-spin{animation:1s linear infinite gds-spin}.proc-file-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);align-items:center;gap:12px;padding:14px;display:flex}.proc-file-icon{background:#2b5ce633;border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;width:42px;height:42px;display:flex}.proc-file-info{flex:1;min-width:0}.proc-file-name{color:var(--text);text-overflow:ellipsis;white-space:nowrap;margin:0;font-size:13px;font-weight:800;overflow:hidden}.proc-file-type{color:var(--muted);margin:3px 0 0;font-size:11px;font-weight:600}.proc-file-pct{color:var(--blue-lt);flex-shrink:0;font-size:20px;font-weight:900}.proc-progress-section{flex-direction:column;gap:6px;display:flex}.proc-progress-labels{justify-content:space-between;align-items:baseline;display:flex}.proc-progress-left{color:var(--text);font-size:12px;font-weight:700}.proc-progress-right{color:var(--muted);font-size:12px;font-weight:600}.proc-progress-track{background:#ffffff1a;border-radius:3px;height:6px;overflow:hidden}.proc-progress-fill{background:var(--blue);border-radius:3px;height:100%;transition:width .4s}.proc-success{border-radius:var(--r);color:#4ade80;background:#16a34a1f;border:1px solid #16a34a40;align-items:center;gap:10px;padding:14px 16px;font-size:15px;font-weight:800;display:flex}.proc-success__icon{background:#16a34a33;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;font-size:14px;display:flex}.proc-error{border-radius:var(--r-sm);color:#ff6b4a;background:#e8441a1a;border:1px solid #e8441a40;padding:12px 14px;font-size:13px;font-weight:700}.proc-tools-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);overflow:hidden}.proc-tool-row{align-items:center;gap:12px;padding:14px 16px;display:flex}.proc-tool-row+.proc-tool-row{border-top:1px solid var(--border)}.proc-tool-icon{border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;width:38px;height:38px;display:flex}.proc-tool-name{color:var(--text);flex:1;font-size:14px;font-weight:800}.proc-tool-badge{border-radius:20px;flex-shrink:0;padding:4px 10px;font-size:11px;font-weight:800}.proc-tool-badge--pending{color:var(--muted);background:#ffffff0f}.proc-tool-badge--processing{background:var(--blue-dim);color:#93c5fd}.proc-tool-badge--completed{color:#4ade80;background:#16a34a2e}.proc-tool-badge--failed{background:var(--coral-dim);color:#ff6b4a}.proc-retry-btn{color:#ff6b4a;width:100%;font-family:var(--font);cursor:pointer;background:#e8441a1a;border:none;border-top:1px solid #e8441a26;padding:10px;font-size:12px;font-weight:800}.proc-retry-btn:disabled{opacity:.5;cursor:not-allowed}.proc-long-wait{color:var(--muted);text-align:center;padding:4px 0;font-size:12px;font-weight:700}.proc-actions{gap:10px;display:flex}.proc-actions .btn{flex:1}.upload-course-select-wrap{align-items:center;gap:12px;display:flex}.upload-course-select{appearance:none;background:var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238B9EC7' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E") no-repeat right 14px center;border:1px solid var(--border);border-radius:var(--r-sm);min-width:0;color:var(--text);font-family:var(--font);cursor:pointer;flex:1;height:48px;padding:0 40px 0 14px;font-size:14px;font-weight:800;transition:border-color .12s,background .12s}.upload-course-select:hover:not(:disabled){border-color:var(--blue-border);background-color:#ffffff12}.upload-course-select:focus-visible{outline:2px solid var(--blue);outline-offset:2px}.upload-course-select:disabled{opacity:.45;cursor:not-allowed}.upload-course-select option{color:var(--text);background:#162348}.upload-course-new-link{color:var(--blue-lt);font-family:var(--font);cursor:pointer;white-space:nowrap;background:0 0;border:none;flex-shrink:0;padding:4px 0;font-size:13px;font-weight:800;transition:opacity .12s}.upload-course-new-link:hover:not(:disabled){opacity:.75}.upload-course-new-link:disabled{opacity:.35;cursor:not-allowed}.upload-course-empty{text-align:center;background:var(--surface);border:1px solid var(--border);border-radius:var(--r);flex-direction:column;align-items:center;gap:8px;padding:28px 20px;display:flex}.upload-course-empty__text{color:var(--text);margin:0;font-size:14px;font-weight:800}.upload-course-empty__hint{color:var(--muted);margin:0 0 4px;font-size:13px;font-weight:600}.drop-zone{border-radius:var(--r);cursor:pointer;text-align:center;background:#2b5ce60d;border:2px dashed #2b5ce659;outline:none;flex-direction:column;align-items:center;gap:8px;padding:32px 20px;transition:border-color .15s,background .15s;display:flex}.drop-zone:focus-visible{border-color:var(--blue)}.drop-zone--dragging{border-color:var(--blue);background:#2b5ce61f}.drop-zone--has-file{border-color:var(--teal);background:#0ba88f14}.drop-zone--disabled{opacity:.5;cursor:not-allowed}.drop-zone__icon-wrap{background:#2b5ce633;border-radius:16px;justify-content:center;align-items:center;width:56px;height:56px;margin-bottom:4px;display:flex}.drop-zone--has-file .drop-zone__icon-wrap{background:#0ba88f33}.drop-zone__headline{color:var(--text);margin:0;font-size:16px;font-weight:800}.drop-zone__sub{color:var(--muted);margin:0;font-size:13px;font-weight:600}.drop-zone__filename{color:var(--text);word-break:break-all;margin:0;font-size:14px;font-weight:800}.drop-zone__filemeta{color:var(--muted);margin:0;font-size:12px;font-weight:600}.drop-zone__chips{flex-wrap:wrap;justify-content:center;gap:6px;margin-top:4px;display:flex}.drop-zone__chip{color:#ffffff80;background:#ffffff14;border-radius:20px;padding:3px 8px;font-size:11px;font-weight:700}.toast{border-radius:var(--r-sm);flex-shrink:0;align-items:flex-start;gap:12px;width:100%;max-width:calc(100% - 32px);margin:0 auto;padding:14px 16px;display:flex}.toast--error{background:#e8441a26;border:1px solid #e8441a59}.toast--success{background:#16a34a26;border:1px solid #16a34a59}.toast__icon{border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;display:flex}.toast--error .toast__icon{background:#e8441a33}.toast--success .toast__icon{background:#16a34a33}.toast__message{flex:1;margin:0;padding-top:5px;font-size:13px;font-weight:700;line-height:1.5}.toast--error .toast__message{color:#ff6b4a}.toast--success .toast__message{color:#4ade80}.toast__ok{color:var(--muted);cursor:pointer;font-size:12px;font-weight:800;font-family:var(--font);background:0 0;border:none;flex-shrink:0;padding:4px 0}.toast__ok:hover{color:var(--text)}.upload-error{border-radius:var(--r-sm);color:#ff6b4a;white-space:pre-wrap;word-break:break-word;background:#e8441a1a;border:1px solid #e8441a40;padding:12px 14px;font-size:13px;font-weight:700;line-height:1.45}.upload-submit-btn{border-radius:14px;width:100%;height:56px;font-size:15px}.quiz-done__heading{font-family:var(--font);color:var(--text);margin:0;font-size:1.5rem;font-weight:900;line-height:1.2}.quiz-done__score{border-radius:var(--r);border:1px solid var(--border);background:var(--surface);box-sizing:border-box;flex-direction:column;align-items:center;gap:.35rem;width:100%;padding:1.25rem 1.5rem;display:flex}.quiz-done__score--coral{background:var(--coral-dim);border-color:var(--coral-border)}.quiz-done__score--coral .quiz-done__score-pct{color:var(--coral)}.quiz-done__score--amber{background:color-mix(in srgb, var(--amber) 14%, transparent);border-color:color-mix(in srgb, var(--amber) 38%, transparent)}.quiz-done__score--amber .quiz-done__score-pct{color:var(--amber)}.quiz-done__score--blue{background:var(--blue-dim);border-color:var(--blue-border)}.quiz-done__score--blue .quiz-done__score-pct{color:var(--blue-lt)}.quiz-done__score--green{background:#16a34a1f;border-color:#16a34a47}.quiz-done__score--green .quiz-done__score-pct{color:var(--success-bright)}.quiz-done__score-pct{font-size:2.5rem;font-weight:900;line-height:1;font-family:var(--font);color:var(--text)}.quiz-done__score-detail{color:var(--muted);font-size:.875rem;font-weight:600;font-family:var(--font)}.quiz-done__lede,.quiz-done__streak{color:var(--muted);font-size:.9375rem;font-weight:600;line-height:1.45;font-family:var(--font);margin:0}.quiz-done__all-correct{color:var(--success-bright);font-size:.9375rem;font-weight:700;font-family:var(--font);margin:0}.quiz-done__weak{text-align:left;width:100%;margin:0}.quiz-done__weak-head{justify-content:space-between;align-items:center;gap:12px;margin-bottom:6px;display:flex}.quiz-done__weak-label{flex:1;min-width:0}.quiz-done__weak-count{background:var(--coral-dim);border:1px solid var(--coral-border);min-width:26px;height:26px;color:var(--coral);font-size:12px;font-weight:800;font-family:var(--font);border-radius:999px;flex-shrink:0;justify-content:center;align-items:center;padding:0 8px;display:inline-flex}.quiz-done__weak-hint{color:var(--muted);font-size:13px;font-weight:600;font-family:var(--font);margin:0 0 12px}.quiz-done__chips{flex-direction:column;gap:10px;display:flex}.weak-chip{border-radius:var(--r-sm);border:1px solid var(--border);background:var(--surface);overflow:hidden}.weak-chip__trigger{text-align:left;width:100%;min-height:44px;font:inherit;font-family:var(--font);cursor:pointer;color:var(--text);box-sizing:border-box;-webkit-tap-highlight-color:transparent;background:0 0;border:none;justify-content:space-between;align-items:center;gap:12px;padding:14px 16px;font-size:14px;font-weight:700;display:flex}.weak-chip__label{text-align:left;text-overflow:ellipsis;flex:1;min-width:0;overflow:hidden}.weak-chip__trigger:after{content:"›";color:var(--muted);flex-shrink:0;font-size:1.15rem;font-weight:800;line-height:1;transition:transform .2s}.weak-chip--expanded .weak-chip__trigger:after{transform:rotate(90deg)}.weak-chip__trigger:hover{background:#ffffff0f}.weak-chip__detail{border-top:1px solid var(--border);background:#ffffff08;padding:12px 16px 14px}.weak-chip__answer{color:var(--teal);font-size:14px;font-weight:800;font-family:var(--font);margin:0 0 8px}.weak-chip__explanation{color:var(--muted);font-size:13px;font-weight:600;line-height:1.45;font-family:var(--font);margin:0}.quiz-done__actions{flex-direction:column;gap:12px;width:100%;margin-top:8px;display:flex}.quiz-done__action-btn,.diagram-study-page{width:100%}.diagram-study-page__hint{font-family:var(--font);color:var(--muted);margin:0;font-size:14px;font-weight:600;line-height:1.45}.diagram-svg-host{background:var(--diagram-canvas);border:1px solid var(--border);border-radius:var(--r);box-sizing:border-box;width:100%;margin:0;padding:12px;overflow:auto}.diagram-svg-host svg{margin:0 auto;display:block}.diagram-hit{cursor:pointer}.diagram-hit:hover,.diagram-hit:focus-visible{outline:2px solid var(--purple);outline-offset:3px}.diagram-fallback{text-align:center;width:100%;margin:0}.diagram-fallback img{border-radius:var(--r);border:1px solid var(--border);box-sizing:border-box;max-width:100%;height:auto}.diagram-card-panel{border-radius:var(--r);background:var(--purple-dim);border:1px solid var(--purple-border);box-sizing:border-box;flex-direction:column;align-items:stretch;width:100%;margin-top:4px;padding:16px;display:flex}.diagram-card-panel__title{font-family:var(--font);color:var(--text);margin:0 0 14px;font-size:18px;font-weight:900;line-height:1.2}.diagram-card-panel__field{margin:0 0 14px}.diagram-card-panel__field:last-of-type{margin-bottom:16px}.diagram-card-panel__field .section-label{margin-bottom:6px}.diagram-card-panel__text{font-family:var(--font);color:var(--text);margin:0;font-size:15px;font-weight:700;line-height:1.45}.diagram-card-panel__dismiss{align-self:flex-start;margin-top:4px}.pronunciation-study-page{width:100%}.pronunciation-study-page__empty{font-family:var(--font);color:var(--muted);margin:0;font-size:14px;font-weight:600;line-height:1.45}.pron-list{flex-direction:column;gap:10px;width:100%;margin:0;padding:0;list-style:none;display:flex}.pron-list__item{border-radius:var(--r);background:var(--surface);border:1px solid var(--border);box-sizing:border-box;justify-content:space-between;align-items:center;gap:14px;min-height:56px;padding:14px 16px;display:flex}.pron-list__body{flex:1;min-width:0}.pron-list__term{font-family:var(--font);color:var(--text);margin:0;font-size:16px;font-weight:800;line-height:1.3}.pron-list__phon{font-family:var(--font);color:var(--muted);margin:6px 0 0;font-size:14px;font-weight:600;line-height:1.4}.pron-list__play-btn{background:var(--teal);color:#fff;border:none;flex-shrink:0;height:44px;padding:0 16px;font-size:13px}.pron-list__play-btn:hover:not(:disabled){background:color-mix(in srgb, var(--teal) 82%, #fff)}.pron-list__na{font-family:var(--font);color:var(--muted);flex-shrink:0;font-size:13px;font-weight:600}