html,body{background:#f7f8fa;width:100%;min-height:100%;margin:0}#root{background:#f7f8fa;width:100%;min-height:100dvh}:root{--eartrainer-purple:#aa96ca;--eartrainer-purple-dark:#8d74b5;--eartrainer-purple-soft:#f6f2fb;--eartrainer-text:#17131d;--eartrainer-muted:#6b7280;--eartrainer-border:#e5e7eb}.auth-page{box-sizing:border-box;background:radial-gradient(circle at top, var(--eartrainer-purple-soft), white 48%);width:100%;min-height:100vh;color:var(--eartrainer-text);place-items:center;padding:24px;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;display:grid;overflow:hidden}.auth-card{border:1px solid var(--eartrainer-border);background:#fff;border-radius:24px;width:min(440px,100%);padding:24px;box-shadow:0 30px 90px #402c5829}.auth-card-signup{width:min(480px,100%)}.auth-brand{align-items:center;gap:10px;margin-bottom:14px;display:flex}.auth-logo{object-fit:contain;border-radius:14px;width:48px;height:48px;padding:4px}.auth-wordmark{color:var(--eartrainer-text);letter-spacing:-1px;font-family:Courier New,Courier,monospace;font-size:26px;font-weight:700;line-height:1.1}.auth-card h1{color:var(--eartrainer-text);letter-spacing:-.03em;margin:0;font-size:32px;line-height:1.05}.auth-subtitle{color:var(--eartrainer-muted);margin:6px 0 0;line-height:1.45}.auth-kicker{color:var(--eartrainer-purple-dark);letter-spacing:.08em;text-transform:uppercase;margin:0 0 6px;font-size:13px;font-weight:900}.auth-card form{margin-top:18px}.auth-card label{color:var(--eartrainer-text);margin:14px 0;font-size:15px;font-weight:800;display:block}.auth-card input,.auth-card select{box-sizing:border-box;border:1px solid var(--eartrainer-border);width:100%;color:var(--eartrainer-text);font:inherit;background:#fff;border-radius:14px;outline:none;margin-top:6px;padding:12px 14px;font-size:16px;transition:border-color .15s,box-shadow .15s}.auth-card input::placeholder{color:#9ca3af}.auth-field-note{color:var(--eartrainer-muted);margin-top:6px;font-size:12px;font-weight:500;line-height:1.4;display:block}.auth-card input:hover:not(:disabled),.auth-card select:hover:not(:disabled){border-color:#cfc4df}.auth-card input:focus,.auth-card select:focus{border-color:var(--eartrainer-purple);box-shadow:0 0 0 4px #aa96ca2e}.auth-card input:disabled,.auth-card select:disabled{cursor:not-allowed;opacity:.65}.auth-primary{background:var(--eartrainer-purple);color:#fff;cursor:pointer;border:none;border-radius:14px;width:100%;margin-top:8px;padding:12px 16px;font-size:16px;font-weight:900;transition:background .15s,transform .15s}.auth-primary:hover:not(:disabled){background:var(--eartrainer-purple-dark);transform:translateY(-1px)}.auth-primary:active:not(:disabled){transform:translateY(0)}.auth-primary:disabled{cursor:wait;opacity:.68}.auth-link{width:100%;color:var(--eartrainer-purple-dark);font:inherit;cursor:pointer;background:0 0;border:none;margin-top:10px;padding:4px;font-weight:800}.auth-link:hover:not(:disabled){text-underline-offset:3px;text-decoration:underline}.auth-primary:focus-visible,.auth-link:focus-visible{outline-offset:3px;outline:3px solid #aa96ca61}.auth-error{color:#991b1b;background:#fee2e2;border-radius:12px;margin:10px 0;padding:10px 12px;font-size:14px;font-weight:800;line-height:1.4}.auth-account-type{border:0;margin:0 0 12px;padding:0}.auth-account-type legend{color:var(--eartrainer-text);margin-bottom:6px;padding:0;font-size:15px;font-weight:800}.auth-segmented{border:1px solid var(--eartrainer-border);background:#f5f5f7;border-radius:10px;grid-template-columns:repeat(2,1fr);gap:4px;padding:3px;display:grid}.auth-segmented button{min-height:38px;color:var(--eartrainer-muted);font:inherit;cursor:pointer;background:0 0;border:0;border-radius:7px;padding:8px 12px;font-weight:600;transition:background-color .15s,color .15s,box-shadow .15s}.auth-segmented button.active{background:var(--eartrainer-purple);color:#fff;box-shadow:0 2px 6px #402c582e}.auth-segmented button:focus-visible{outline:2px solid var(--eartrainer-purple);outline-offset:2px}.auth-segmented button.active:hover:not(:disabled){background:var(--eartrainer-purple-dark)}.auth-segmented button:disabled{cursor:not-allowed;opacity:.65}@media (width<=520px){.auth-page{place-items:start center;padding:18px 14px}.auth-card{border-radius:22px;padding:20px 18px}.auth-card h1{font-size:28px}.auth-wordmark{font-size:24px}.auth-logo{width:44px;height:44px}}.app-loading-page{z-index:99999;box-sizing:border-box;color:#17131d;background:radial-gradient(circle at top,#f6f2fb,#fff 48%);place-items:center;padding:24px;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;display:grid;position:fixed;inset:0}.app-loading-content{flex-direction:column;align-items:center;gap:18px;display:flex}.app-loading-logo{object-fit:contain;width:min(280px,70vw);height:auto}.app-loading-spinner{box-sizing:border-box;border:3px solid #aa96ca40;border-top-color:#8d74b5;border-radius:50%;width:32px;height:32px;animation:.75s linear infinite app-loading-spin}@keyframes app-loading-spin{to{transform:rotate(360deg)}}@media (prefers-reduced-motion:reduce){.app-loading-spinner,.auth-loading-spinner{animation-duration:1.5s}}.auth-consent-box{border:1px solid var(--eartrainer-border);background:var(--eartrainer-purple-soft);border-radius:14px;margin:18px 0;padding:16px}.auth-consent-box strong{margin-bottom:10px;display:block}.auth-consent-box ul{margin:0;padding-left:20px}.auth-consent-box li+li{margin-top:6px}.auth-link-inline{text-align:left;width:auto;margin:0 6px 10px;padding:0;font-size:12px;display:block}.auth-success{color:#065f46;background:#ecfdf5;border-radius:12px;margin:18px 0 10px;padding:12px 14px;font-size:14px;font-weight:800;line-height:1.45}.auth-consent-card{box-sizing:border-box;flex-direction:column;max-height:calc(100dvh - 48px);display:flex;overflow:hidden}.auth-consent-header,.auth-consent-footer{flex:none}.auth-consent-body{overscroll-behavior:contain;min-height:0;padding-right:6px;overflow-y:auto}.auth-consent-footer{border-top:1px solid var(--eartrainer-border);background:#fff;padding-top:12px}.auth-consent-footer .auth-primary{margin-top:0}@media (width<=520px){.auth-consent-card{max-height:calc(100dvh - 36px)}}.eartrainer-loader{z-index:99999;box-sizing:border-box;background:radial-gradient(circle at 50% 38%,#8b6fb91c 0,#8b6fb90b 26%,#0000 52%),linear-gradient(#fbfaff 0%,#f7f5fb 100%);place-items:center;width:100%;min-height:100dvh;margin:0;padding:24px;display:grid;position:fixed;inset:0;overflow:hidden}.eartrainer-loader__content{flex-direction:column;justify-content:center;align-items:center;gap:28px;width:min(340px,82vw);min-height:220px;display:flex;position:relative}.eartrainer-loader__logo-wrap{place-items:center;width:100%;display:grid;position:relative}.eartrainer-loader__logo-wrap:before{content:"";filter:blur(38px);background:#8c71b724;border-radius:50%;width:220px;height:110px;animation:2.2s ease-in-out infinite eartrainer-loader-glow;position:absolute}.eartrainer-loader__logo{z-index:1;object-fit:contain;filter:drop-shadow(0 8px 18px #3624521a);width:min(260px,68vw);height:auto;max-height:120px;display:block;position:relative}.eartrainer-loader__spinner{box-sizing:border-box;border:3px solid #7e62a9f2;border-color:#7e62a9f2 #7e62a97a #7e62a92e #7e62a92e;border-radius:50%;width:28px;height:28px;animation:.7s linear infinite eartrainer-loader-spin}@keyframes eartrainer-loader-spin{to{transform:rotate(360deg)}}@keyframes eartrainer-loader-glow{0%,to{opacity:.55;transform:scale(.94)}50%{opacity:1;transform:scale(1.05)}}@media (prefers-reduced-motion:reduce){.eartrainer-loader__spinner{animation-duration:1.5s}.eartrainer-loader__logo-wrap:before{opacity:.75;animation:none}}.auth-invitation-role{background:var(--eartrainer-purple-soft);color:var(--eartrainer-text);border:1px solid #ded4ec;border-radius:12px;gap:3px;margin:0 0 12px;padding:11px 13px;display:grid}.auth-invitation-role strong{font-size:15px}.auth-invitation-role span{color:var(--eartrainer-muted);font-size:13px;line-height:1.4}.auth-status{box-sizing:border-box;background:radial-gradient(circle at top, var(--eartrainer-purple-soft), white 48%);min-height:100dvh;color:var(--eartrainer-text);text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:12px;padding:28px;display:flex}.auth-status>h1{width:min(520px,100%);color:var(--eartrainer-text);letter-spacing:-.03em;margin:0;font-size:clamp(28px,5vw,38px);line-height:1.08}.auth-status>p{width:min(560px,100%);color:var(--eartrainer-muted);margin:0 0 4px;line-height:1.55}.auth-status>button{border:1px solid var(--eartrainer-purple);background:var(--eartrainer-purple);color:#fff;width:min(360px,100%);min-height:44px;font:inherit;cursor:pointer;border-radius:13px;padding:10px 16px;font-weight:850}.auth-status>button+button{border-color:var(--eartrainer-border);color:var(--eartrainer-text);background:#fff}.auth-status>button:disabled{cursor:wait;opacity:.65}.auth-status>.auth-error{box-sizing:border-box;width:min(520px,100%)}.auth-session-expired-card{text-align:center;width:min(500px,100%)}.auth-session-expired-card .auth-brand{justify-content:center;margin-bottom:24px}.auth-session-expired-icon{background:var(--eartrainer-purple-soft);width:58px;height:58px;color:var(--eartrainer-purple-dark);border-radius:18px;place-items:center;margin:0 auto 18px;font-size:34px;font-weight:700;line-height:1;display:grid}.auth-session-expired-copy{max-width:410px;margin:10px auto 0}.auth-session-expired-instruction{background:var(--eartrainer-purple-soft);color:var(--eartrainer-text);border:1px solid #ded5ea;border-radius:14px;margin-top:22px;padding:15px 17px;font-size:16px;font-weight:850;line-height:1.4}.auth-session-expired-note{color:var(--eartrainer-muted);margin:16px 8px 0;font-size:13px;line-height:1.45}.student-video-response{flex-direction:column;gap:14px;display:flex}.video-response-recorder{flex-direction:column;gap:10px;width:min(100%,680px);display:flex}.video-response-preview{aspect-ratio:16/9;background:#111;border:1px solid #e4e4e7;border-radius:12px;width:100%;position:relative;overflow:hidden}.video-response-preview video{object-fit:cover;background:#111;width:100%;height:100%;display:block}.video-response-placeholder{color:#d4d4d8;text-align:center;pointer-events:none;justify-content:center;align-items:center;padding:24px;font-size:14px;display:flex;position:absolute;inset:0}.video-response-timer{color:#fff;background:#000000b8;border-radius:999px;padding:6px 10px;font-size:12px;font-weight:700;position:absolute;top:10px;left:10px}.video-response-actions{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.video-response-limit,.video-response-status{color:#71717a;font-size:12px}.video-response-error{color:#b91c1c;font-size:13px}.video-response-submission-video{aspect-ratio:16/9;background:#111;border-radius:12px;width:min(100%,680px)}.video-response-record-button{color:#3f3f46;min-height:36px;font:inherit;cursor:pointer;background:#fff;border:1px solid #d4d4d8;border-radius:8px;justify-content:center;align-items:center;padding:0 14px;font-size:13px;font-weight:600;display:inline-flex}.video-response-record-button:hover:not(:disabled){background:#f4f4f5}.video-response-record-button:disabled{opacity:.55;cursor:not-allowed}.video-response-status-uploading,.video-response-status-complete{color:#3f3f46;background:#fafafa;border:1px solid #d4d4d8;border-radius:8px;align-items:center;gap:8px;width:fit-content;padding:8px 10px;font-size:13px;font-weight:600;display:inline-flex}.video-response-upload-spinner{border:2px solid #d4d4d8;border-top-color:#52525b;border-radius:50%;flex:0 0 14px;width:14px;height:14px;animation:.8s linear infinite video-response-spin}@keyframes video-response-spin{to{transform:rotate(360deg)}}.chord-writing-input{width:100%;max-width:560px}.chord-writing-input__palette{flex-wrap:wrap;gap:.4rem;margin-bottom:.65rem;display:flex}.chord-writing-input__accidental-button,.chord-writing-input__clear{color:#161616;cursor:pointer;font:inherit;background:#fff;border:1px solid #a7a7a7;border-radius:.42rem}.chord-writing-input__accidental-button{min-width:2.55rem;min-height:2.25rem;padding:.28rem .55rem;font-size:1.05rem}.chord-writing-input__accidental-button[aria-pressed=true]{background:#eaf3fd;border:2px solid #1f67b1}.chord-writing-input__accidental-button:disabled,.chord-writing-input__clear:disabled{cursor:default;opacity:.55}.chord-writing-input__staff-shell{border:1px solid #0000;border-radius:.5rem;width:100%;overflow-x:auto}.chord-writing-input__staff-shell.is-correct{border-color:#237a3b}.chord-writing-input__staff-shell.is-incorrect{border-color:#c62828}.chord-writing-input__staff{color:#111;width:100%;min-width:340px;height:auto;display:block;overflow:visible}.chord-writing-input__hitbox{cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent}.chord-writing-input__staff-caption{justify-content:center;align-items:center;width:100%;display:flex}.chord-writing-input__footer{color:#555;justify-content:flex-end;align-items:center;gap:.75rem;min-height:2rem;margin-top:.35rem;font-size:.875rem;display:flex}.chord-writing-input__clear{padding:.35rem .65rem}.triad-writing-editor-shell,.student-triad-writing,.view-triad-writing{width:100%}.triad-writing-editor-shell .interval-chip:disabled{cursor:default;opacity:.55}.triad-writing-editor-warning{color:#b91c1c;background:#fef2f2;border:1px solid #fecaca;border-radius:8px;margin:0 0 14px;padding:10px 12px;font-size:.9rem}.triad-writing-student-inner{width:100%;max-width:560px;margin:0 auto;padding:20px}.triad-writing-aural-shell{width:100%;max-width:400px;margin:0 auto}.triad-writing-card{box-shadow:none;border-radius:18px;padding:22px}.triad-writing-symbol{color:#111827;text-align:center;margin:12px 0 8px;font-family:Georgia,Times New Roman,serif;font-size:clamp(1.55rem,4vw,1.9rem);font-weight:600;line-height:1;display:block}.triad-writing-card .chord-writing-input{max-width:100%;margin:0 auto}.triad-writing-card .chord-writing-input__palette{justify-content:center}.triad-writing-feedback{border-radius:9px;margin-top:10px;padding:10px 12px;font-size:.9rem;line-height:1.4}.triad-writing-feedback.is-correct{color:#166534;background:#f0fdf4;border:1px solid #bbf7d0}.triad-writing-feedback.is-incorrect{color:#991b1b;background:#fef2f2;border:1px solid #fecaca}.triad-writing-grading-error{color:#991b1b;background:#fef2f2;border:1px solid #fecaca;border-radius:9px;margin:12px auto 0;padding:10px 12px;font-size:.9rem}.triad-writing-navigation{justify-content:space-between;align-items:center;gap:10px;margin-top:18px;display:flex}.triad-writing-navigation-dots{flex-wrap:wrap;justify-content:center;align-items:center;gap:6px;display:flex}.triad-writing-navigation-dot{color:#6b7280;cursor:pointer;width:30px;height:30px;font:inherit;background:#fff;border:1px solid #d1d5db;border-radius:50%;justify-content:center;align-items:center;font-size:13px;font-weight:700;transition:all .12s;display:inline-flex}.triad-writing-navigation-dot.is-current{color:#fff;background:#111827;border-color:#111827}.triad-writing-navigation-dot.is-wrong{color:#fff;background:#dc2626;border-color:#dc2626}.triad-writing-empty{color:#6b7280;text-align:center;padding:24px}.written-triad-id-editor-shell,.student-written-triad-id,.view-written-triad-id{width:100%}.written-triad-id-editor-section{margin-top:18px}.written-triad-id-editor-shell .interval-chip:disabled{cursor:default;opacity:.55}.written-triad-id-editor-warning{color:#b91c1c;background:#fef2f2;border:1px solid #fecaca;border-radius:8px;margin:0 0 14px;padding:10px 12px;font-size:.9rem}.written-triad-id-settings-row{align-items:end}.written-triad-id-student-inner{width:100%;max-width:560px;margin:0 auto;padding:20px}.written-triad-id-aural-shell{width:100%;max-width:400px;margin:0 auto}.written-triad-id-card{box-shadow:none;border-radius:18px;padding:22px}.written-triad-id-card .chord-writing-input{max-width:100%;margin:0 auto}.written-triad-id-answer-area{margin-top:14px}.written-triad-id-symbol-answer{color:#374151;flex-direction:column;gap:7px;font-size:.85rem;font-weight:600;display:flex}.written-triad-id-symbol-answer input,.written-triad-id-stacked-answer input,.written-triad-id-stacked-answer select{box-sizing:border-box;color:#111827;width:100%;font:inherit;background:#fff;border:1px solid #d1d5db;border-radius:9px;padding:10px 11px;font-size:1rem}.written-triad-id-symbol-answer input{text-align:center;font-family:Georgia,Times New Roman,serif;font-size:1.15rem}.written-triad-id-symbol-answer input:focus,.written-triad-id-stacked-answer input:focus,.written-triad-id-stacked-answer select:focus{outline-offset:1px;border-color:#3b82f6;outline:2px solid #3b82f62e}.written-triad-id-symbol-answer input.is-wrong,.written-triad-id-stacked-answer.is-wrong input,.written-triad-id-stacked-answer.is-wrong select{background:#fff7f7;border-color:#dc2626}.written-triad-id-stacked-answer{grid-template-columns:1fr;gap:10px;display:grid}.written-triad-id-stacked-heading{color:#111827;margin-bottom:2px;font-size:.95rem;font-weight:700}.written-triad-id-stacked-answer label{color:#374151;grid-template-columns:92px minmax(0,1fr);align-items:center;gap:10px;font-size:.85rem;font-weight:600;display:grid}.written-triad-id-stacked-answer select{appearance:auto}.written-triad-id-answer-hint{color:#6b7280;font-size:.78rem;font-weight:500;line-height:1.45}.written-triad-id-symbol-answer .written-triad-id-answer-hint{margin-top:1px}.written-triad-id-feedback,.written-triad-id-grading-error{border-radius:9px;margin-top:12px;padding:10px 12px;font-size:.9rem;line-height:1.4}.written-triad-id-feedback.is-correct{color:#166534;background:#f0fdf4;border:1px solid #bbf7d0}.written-triad-id-feedback.is-incorrect,.written-triad-id-grading-error{color:#991b1b;background:#fef2f2;border:1px solid #fecaca}.written-triad-id-feedback-detail{white-space:nowrap}.written-triad-id-navigation{justify-content:space-between;align-items:center;gap:10px;margin-top:18px;display:flex}.written-triad-id-navigation-dots{flex-wrap:wrap;justify-content:center;align-items:center;gap:6px;display:flex}.written-triad-id-navigation-dot{color:#6b7280;cursor:pointer;width:30px;height:30px;font:inherit;background:#fff;border:1px solid #d1d5db;border-radius:50%;justify-content:center;align-items:center;font-size:13px;font-weight:700;display:inline-flex}.written-triad-id-navigation-dot.is-current{color:#fff;background:#111827;border-color:#111827}.written-triad-id-navigation-dot.is-wrong{color:#fff;background:#dc2626;border-color:#dc2626}.written-triad-id-empty{color:#6b7280;text-align:center;padding:24px}.written-triad-id-submitted-symbol{border:1px solid #e5e7eb;border-radius:9px;justify-content:space-between;align-items:center;gap:12px;margin-top:14px;padding:10px 12px;display:flex}.written-triad-id-submitted-symbol span,.written-triad-id-submitted-stack span{color:#6b7280;font-size:.82rem}.written-triad-id-submitted-symbol strong{font-family:Georgia,Times New Roman,serif;font-size:1.15rem}.written-triad-id-submitted-stack{gap:7px;margin-top:14px;display:grid}.written-triad-id-submitted-stack>div{border:1px solid #e5e7eb;border-radius:8px;justify-content:space-between;align-items:center;gap:12px;padding:8px 10px;display:flex}@media (width<=520px){.written-triad-id-navigation{flex-wrap:wrap;align-items:stretch}.written-triad-id-navigation-dots{order:3;width:100%}}
