:root,:root[data-theme=dark]{color-scheme:dark;--color-app-bg: #0a0a0b;--color-body-bg: radial-gradient(circle at top left, rgba(30, 144, 255, .18), transparent 34rem), radial-gradient(circle at bottom right, rgba(255, 179, 71, .12), transparent 30rem), #0a0a0b;--color-panel: rgba(24, 24, 27, .82);--color-panel-strong: rgba(18, 18, 20, .96);--color-surface: rgba(10, 10, 11, .42);--color-surface-soft: rgba(10, 10, 11, .38);--color-surface-subtle: rgba(10, 10, 11, .5);--color-surface-hover: rgba(24, 24, 27, .88);--color-border: #2d2d33;--color-border-strong: #52525b;--color-text: #f4f4f5;--color-text-muted: #a1a1aa;--color-text-muted-strong: #d4d4d8;--color-eyebrow: #38bdf8;--color-primary: #1b82e6;--color-primary-hover: #176fc4;--color-primary-soft: rgba(27, 130, 230, .14);--color-primary-soft-hover: rgba(27, 130, 230, .24);--color-primary-outline: #1b82e6;--color-primary-outline-hover: #176fc4;--color-primary-contrast: #ffffff;--color-success: #34d399;--color-success-hover: #10b981;--color-success-soft: rgba(52, 211, 153, .12);--color-success-soft-hover: rgba(52, 211, 153, .22);--color-success-outline: #10b981;--color-success-outline-hover: #10b981;--color-success-fill: #059669;--color-success-fill-hover: #047857;--color-accent: #ffb347;--color-accent-hover: #f59e0b;--color-accent-soft: rgba(255, 179, 71, .14);--color-accent-soft-hover: rgba(255, 179, 71, .24);--color-danger: #f87171;--color-danger-soft: rgba(248, 113, 113, .1);--color-danger-hover: rgba(248, 113, 113, .16);--color-danger-text: #fca5a5;--color-destructive: #b91c1c;--color-destructive-hover: #991b1b;--color-destructive-text: #ffffff;--color-stop: #972020;--color-track: #27272a;--color-edit: #7dd3fc;--color-edit-soft: rgba(125, 211, 252, .12);--color-edit-soft-hover: rgba(125, 211, 252, .18);--color-neutral-action: #f4f4f5;--color-neutral-action-hover: #d4d4d8;--color-neutral-action-contrast: #111827;--color-neutral-action-soft-hover: rgba(244, 244, 245, .1);--color-neutral-action-active-bg: #ffffff;--color-neutral-action-active-text: #111827;--shadow-elevated: 0 20px 60px rgba(0, 0, 0, .22);--shadow-subtle: 0 20px 60px rgba(0, 0, 0, .16);--overlay-dialog-backdrop: rgba(0, 0, 0, .68);--bg: var(--color-app-bg);--body-bg: var(--color-body-bg);--panel: var(--color-panel);--panel-strong: var(--color-panel-strong);--surface: var(--color-surface);--surface-soft: var(--color-surface-soft);--surface-subtle: var(--color-surface-subtle);--surface-hover: var(--color-surface-hover);--border: var(--color-border);--border-strong: var(--color-border-strong);--text: var(--color-text);--muted: var(--color-text-muted);--muted-strong: var(--color-text-muted-strong);--eyebrow: var(--color-eyebrow);--blue: var(--color-primary);--blue-hover: var(--color-primary-hover);--blue-soft: var(--color-primary-soft);--blue-soft-hover: var(--color-primary-soft-hover);--green: var(--color-success);--green-hover: var(--color-success-hover);--green-soft: var(--color-success-soft);--green-soft-hover: var(--color-success-soft-hover);--mango: var(--color-accent);--mango-hover: var(--color-accent-hover);--mango-soft: var(--color-accent-soft);--mango-soft-hover: var(--color-accent-soft-hover);--danger: var(--color-danger);--danger-soft: var(--color-danger-soft);--danger-hover: var(--color-danger-hover);--danger-text: var(--color-danger-text);--destructive: var(--color-destructive);--destructive-hover: var(--color-destructive-hover);--destructive-text: var(--color-destructive-text);--stop: var(--color-stop);--track: var(--color-track);--shadow: var(--shadow-elevated);--shadow-soft: var(--shadow-subtle);--dialog-backdrop: var(--overlay-dialog-backdrop);--strum-down: #f4f4f5;--strum-down-soft: rgba(244, 244, 245, .12);--strum-up: #ffef96;--strum-up-soft: rgba(255, 239, 150, .1);--diagram-bg: rgba(10, 10, 11, .42);--diagram-string: rgba(244, 244, 245, .62);--diagram-fret: rgba(244, 244, 245, .48);--diagram-nut: rgba(244, 244, 245, .9);--diagram-open-string: #7dd3fc;--diagram-muted-string: #fca5a5;--diagram-finger-label: #ffffff}:root[data-theme=light]{color-scheme:light;--color-app-bg: #f6f8fb;--color-body-bg: radial-gradient(circle at top left, rgba(27, 130, 230, .14), transparent 34rem), radial-gradient(circle at bottom right, rgba(255, 179, 71, .18), transparent 30rem), #f6f8fb;--color-panel: rgba(255, 255, 255, .9);--color-panel-strong: rgba(255, 255, 255, .98);--color-surface: rgba(248, 250, 252, .88);--color-surface-soft: rgba(241, 245, 249, .78);--color-surface-subtle: rgba(255, 255, 255, .86);--color-surface-hover: rgba(226, 232, 240, .96);--color-border: #d7dde7;--color-border-strong: #94a3b8;--color-text: #111827;--color-text-muted: #475569;--color-text-muted-strong: #1f2937;--color-eyebrow: #0f4f9e;--color-primary: #0f72d8;--color-primary-hover: #0b5bb0;--color-primary-soft: rgba(15, 114, 216, .12);--color-primary-soft-hover: rgba(15, 114, 216, .2);--color-primary-outline: #0f72d8;--color-primary-outline-hover: #0b5bb0;--color-primary-contrast: #ffffff;--color-success: #059669;--color-success-hover: #047857;--color-success-soft: rgba(5, 150, 105, .12);--color-success-soft-hover: rgba(5, 150, 105, .2);--color-success-outline: #059669;--color-success-outline-hover: #047857;--color-success-fill: #059669;--color-success-fill-hover: #047857;--color-accent: #b45309;--color-accent-hover: #92400e;--color-accent-soft: rgba(180, 83, 9, .16);--color-accent-soft-hover: rgba(180, 83, 9, .24);--color-danger: #dc2626;--color-danger-soft: rgba(220, 38, 38, .1);--color-danger-hover: rgba(220, 38, 38, .16);--color-danger-text: #b91c1c;--color-destructive: #dc2626;--color-destructive-hover: #b91c1c;--color-destructive-text: #ffffff;--color-stop: #972020;--color-track: #dbe3ef;--color-edit: #0f72d8;--color-edit-soft: rgba(15, 114, 216, .12);--color-edit-soft-hover: rgba(15, 114, 216, .18);--color-neutral-action: #1f2937;--color-neutral-action-hover: #111827;--color-neutral-action-contrast: #ffffff;--color-neutral-action-soft-hover: rgba(31, 41, 55, .08);--color-neutral-action-active-bg: #1f2937;--color-neutral-action-active-text: #ffffff;--shadow-elevated: 0 20px 60px rgba(15, 23, 42, .12);--shadow-subtle: 0 20px 60px rgba(15, 23, 42, .08);--overlay-dialog-backdrop: rgba(15, 23, 42, .34);--bg: var(--color-app-bg);--body-bg: var(--color-body-bg);--panel: var(--color-panel);--panel-strong: var(--color-panel-strong);--surface: var(--color-surface);--surface-soft: var(--color-surface-soft);--surface-subtle: var(--color-surface-subtle);--surface-hover: var(--color-surface-hover);--border: var(--color-border);--border-strong: var(--color-border-strong);--text: var(--color-text);--muted: var(--color-text-muted);--muted-strong: var(--color-text-muted-strong);--eyebrow: var(--color-eyebrow);--blue: var(--color-primary);--blue-hover: var(--color-primary-hover);--blue-soft: var(--color-primary-soft);--blue-soft-hover: var(--color-primary-soft-hover);--green: var(--color-success);--green-hover: var(--color-success-hover);--green-soft: var(--color-success-soft);--green-soft-hover: var(--color-success-soft-hover);--mango: var(--color-accent);--mango-hover: var(--color-accent-hover);--mango-soft: var(--color-accent-soft);--mango-soft-hover: var(--color-accent-soft-hover);--danger: var(--color-danger);--danger-soft: var(--color-danger-soft);--danger-hover: var(--color-danger-hover);--danger-text: var(--color-danger-text);--destructive: var(--color-destructive);--destructive-hover: var(--color-destructive-hover);--destructive-text: var(--color-destructive-text);--stop: var(--color-stop);--track: var(--color-track);--shadow: var(--shadow-elevated);--shadow-soft: var(--shadow-subtle);--dialog-backdrop: var(--overlay-dialog-backdrop);--strum-down: #1f2937;--strum-down-soft: rgba(31, 41, 55, .08);--strum-up: #92400e;--strum-up-soft: rgba(180, 83, 9, .16);--diagram-bg: #f8fafc;--diagram-string: rgba(51, 65, 85, .64);--diagram-fret: rgba(100, 116, 139, .52);--diagram-nut: rgba(15, 23, 42, .82);--diagram-open-string: #0284c7;--diagram-muted-string: #dc2626;--diagram-finger-label: #ffffff}:root[data-accent=purple]{--color-body-bg: radial-gradient(circle at top left, rgba(139, 92, 246, .18), transparent 34rem), radial-gradient(circle at bottom right, rgba(255, 179, 71, .12), transparent 30rem), #0a0a0b;--color-primary: #8b5cf6;--color-primary-hover: #7c3aed;--color-primary-soft: rgba(139, 92, 246, .14);--color-primary-soft-hover: rgba(139, 92, 246, .24);--color-primary-outline: #8b5cf6;--color-primary-outline-hover: #7c3aed;--color-eyebrow: #c4b5fd;--color-edit: #c4b5fd;--color-edit-soft: rgba(196, 181, 253, .12);--color-edit-soft-hover: rgba(196, 181, 253, .18);--diagram-open-string: #c4b5fd}:root[data-accent=teal]{--color-body-bg: radial-gradient(circle at top left, rgba(20, 184, 166, .18), transparent 34rem), radial-gradient(circle at bottom right, rgba(255, 179, 71, .12), transparent 30rem), #0a0a0b;--color-primary: #14b8a6;--color-primary-hover: #0f766e;--color-primary-soft: rgba(20, 184, 166, .14);--color-primary-soft-hover: rgba(20, 184, 166, .24);--color-primary-outline: #14b8a6;--color-primary-outline-hover: #0f766e;--color-eyebrow: #5eead4;--color-edit: #5eead4;--color-edit-soft: rgba(94, 234, 212, .12);--color-edit-soft-hover: rgba(94, 234, 212, .18);--diagram-open-string: #5eead4}:root[data-accent=rose]{--color-body-bg: radial-gradient(circle at top left, rgba(225, 29, 72, .18), transparent 34rem), radial-gradient(circle at bottom right, rgba(255, 179, 71, .12), transparent 30rem), #0a0a0b;--color-primary: #e11d48;--color-primary-hover: #be123c;--color-primary-soft: rgba(225, 29, 72, .14);--color-primary-soft-hover: rgba(225, 29, 72, .24);--color-primary-outline: #e11d48;--color-primary-outline-hover: #be123c;--color-eyebrow: #fda4af;--color-edit: #fda4af;--color-edit-soft: rgba(253, 164, 175, .12);--color-edit-soft-hover: rgba(253, 164, 175, .18);--diagram-open-string: #fda4af}:root[data-accent=amber]{--color-body-bg: radial-gradient(circle at top left, rgba(217, 119, 6, .18), transparent 34rem), radial-gradient(circle at bottom right, rgba(255, 179, 71, .12), transparent 30rem), #0a0a0b;--color-primary: #d97706;--color-primary-hover: #b45309;--color-primary-soft: rgba(217, 119, 6, .14);--color-primary-soft-hover: rgba(217, 119, 6, .24);--color-primary-outline: #d97706;--color-primary-outline-hover: #b45309;--color-eyebrow: #fbbf24;--color-edit: #fbbf24;--color-edit-soft: rgba(251, 191, 36, .12);--color-edit-soft-hover: rgba(251, 191, 36, .18);--diagram-open-string: #fbbf24}:root[data-accent=green]{--color-body-bg: radial-gradient(circle at top left, rgba(22, 163, 74, .18), transparent 34rem), radial-gradient(circle at bottom right, rgba(255, 179, 71, .12), transparent 30rem), #0a0a0b;--color-primary: #16a34a;--color-primary-hover: #15803d;--color-primary-soft: rgba(22, 163, 74, .14);--color-primary-soft-hover: rgba(22, 163, 74, .24);--color-primary-outline: #16a34a;--color-primary-outline-hover: #15803d;--color-eyebrow: #86efac;--color-edit: #86efac;--color-edit-soft: rgba(134, 239, 172, .12);--color-edit-soft-hover: rgba(134, 239, 172, .18);--diagram-open-string: #86efac}:root[data-accent=chartreuse]{--color-body-bg: radial-gradient(circle at top left, rgba(163, 230, 53, .16), transparent 34rem), radial-gradient(circle at bottom right, rgba(255, 179, 71, .1), transparent 30rem), #0a0a0b;--color-primary: #a3e635;--color-primary-hover: #84cc16;--color-primary-soft: rgba(163, 230, 53, .14);--color-primary-soft-hover: rgba(163, 230, 53, .24);--color-primary-outline: #a3e635;--color-primary-outline-hover: #84cc16;--color-eyebrow: #d9f99d;--color-edit: #d9f99d;--color-edit-soft: rgba(217, 249, 157, .12);--color-edit-soft-hover: rgba(217, 249, 157, .18);--diagram-open-string: #d9f99d}:root:not([data-theme=light])[data-accent=chartreuse]{--color-primary-contrast: #111827}:root[data-accent=cyan]{--color-body-bg: radial-gradient(circle at top left, rgba(6, 182, 212, .18), transparent 34rem), radial-gradient(circle at bottom right, rgba(255, 179, 71, .12), transparent 30rem), #0a0a0b;--color-primary: #06b6d4;--color-primary-hover: #0891b2;--color-primary-soft: rgba(6, 182, 212, .14);--color-primary-soft-hover: rgba(6, 182, 212, .24);--color-primary-outline: #06b6d4;--color-primary-outline-hover: #0891b2;--color-eyebrow: #67e8f9;--color-edit: #67e8f9;--color-edit-soft: rgba(103, 232, 249, .12);--color-edit-soft-hover: rgba(103, 232, 249, .18);--diagram-open-string: #67e8f9}:root[data-accent=magenta]{--color-body-bg: radial-gradient(circle at top left, rgba(217, 70, 239, .18), transparent 34rem), radial-gradient(circle at bottom right, rgba(255, 179, 71, .12), transparent 30rem), #0a0a0b;--color-primary: #d946ef;--color-primary-hover: #c026d3;--color-primary-soft: rgba(217, 70, 239, .14);--color-primary-soft-hover: rgba(217, 70, 239, .24);--color-primary-outline: #d946ef;--color-primary-outline-hover: #c026d3;--color-eyebrow: #f0abfc;--color-edit: #f0abfc;--color-edit-soft: rgba(240, 171, 252, .12);--color-edit-soft-hover: rgba(240, 171, 252, .18);--diagram-open-string: #f0abfc}:root[data-theme=light][data-accent=purple]{--color-body-bg: radial-gradient(circle at top left, rgba(124, 58, 237, .14), transparent 34rem), radial-gradient(circle at bottom right, rgba(180, 83, 9, .16), transparent 30rem), #f6f8fb;--color-primary: #7c3aed;--color-primary-hover: #6d28d9;--color-primary-soft: rgba(124, 58, 237, .12);--color-primary-soft-hover: rgba(124, 58, 237, .2);--color-primary-outline: #7c3aed;--color-primary-outline-hover: #6d28d9;--color-eyebrow: #5b21b6;--color-edit: #7c3aed;--color-edit-soft: rgba(124, 58, 237, .12);--color-edit-soft-hover: rgba(124, 58, 237, .18);--diagram-open-string: #7c3aed}:root[data-theme=light][data-accent=teal]{--color-body-bg: radial-gradient(circle at top left, rgba(15, 118, 110, .14), transparent 34rem), radial-gradient(circle at bottom right, rgba(180, 83, 9, .16), transparent 30rem), #f6f8fb;--color-primary: #0f766e;--color-primary-hover: #115e59;--color-primary-soft: rgba(15, 118, 110, .12);--color-primary-soft-hover: rgba(15, 118, 110, .2);--color-primary-outline: #0f766e;--color-primary-outline-hover: #115e59;--color-eyebrow: #115e59;--color-edit: #0f766e;--color-edit-soft: rgba(15, 118, 110, .12);--color-edit-soft-hover: rgba(15, 118, 110, .18);--diagram-open-string: #0f766e}:root[data-theme=light][data-accent=rose]{--color-body-bg: radial-gradient(circle at top left, rgba(190, 18, 60, .14), transparent 34rem), radial-gradient(circle at bottom right, rgba(180, 83, 9, .16), transparent 30rem), #f6f8fb;--color-primary: #be123c;--color-primary-hover: #9f1239;--color-primary-soft: rgba(190, 18, 60, .12);--color-primary-soft-hover: rgba(190, 18, 60, .2);--color-primary-outline: #be123c;--color-primary-outline-hover: #9f1239;--color-eyebrow: #9f1239;--color-edit: #be123c;--color-edit-soft: rgba(190, 18, 60, .12);--color-edit-soft-hover: rgba(190, 18, 60, .18);--diagram-open-string: #be123c}:root[data-theme=light][data-accent=amber]{--color-body-bg: radial-gradient(circle at top left, rgba(180, 83, 9, .16), transparent 34rem), radial-gradient(circle at bottom right, rgba(180, 83, 9, .12), transparent 30rem), #f6f8fb;--color-primary: #b45309;--color-primary-hover: #92400e;--color-primary-soft: rgba(180, 83, 9, .12);--color-primary-soft-hover: rgba(180, 83, 9, .2);--color-primary-outline: #b45309;--color-primary-outline-hover: #92400e;--color-eyebrow: #92400e;--color-edit: #b45309;--color-edit-soft: rgba(180, 83, 9, .12);--color-edit-soft-hover: rgba(180, 83, 9, .18);--diagram-open-string: #b45309}:root[data-theme=light][data-accent=green]{--color-body-bg: radial-gradient(circle at top left, rgba(21, 128, 61, .14), transparent 34rem), radial-gradient(circle at bottom right, rgba(180, 83, 9, .16), transparent 30rem), #f6f8fb;--color-primary: #15803d;--color-primary-hover: #166534;--color-primary-soft: rgba(21, 128, 61, .12);--color-primary-soft-hover: rgba(21, 128, 61, .2);--color-primary-outline: #15803d;--color-primary-outline-hover: #166534;--color-eyebrow: #166534;--color-edit: #15803d;--color-edit-soft: rgba(21, 128, 61, .12);--color-edit-soft-hover: rgba(21, 128, 61, .18);--diagram-open-string: #15803d}:root[data-theme=light][data-accent=chartreuse]{--color-body-bg: radial-gradient(circle at top left, rgba(77, 124, 15, .14), transparent 34rem), radial-gradient(circle at bottom right, rgba(180, 83, 9, .16), transparent 30rem), #f6f8fb;--color-primary: #4d7c0f;--color-primary-hover: #3f6212;--color-primary-soft: rgba(77, 124, 15, .12);--color-primary-soft-hover: rgba(77, 124, 15, .2);--color-primary-outline: #4d7c0f;--color-primary-outline-hover: #3f6212;--color-eyebrow: #3f6212;--color-edit: #4d7c0f;--color-edit-soft: rgba(77, 124, 15, .12);--color-edit-soft-hover: rgba(77, 124, 15, .18);--diagram-open-string: #4d7c0f}:root[data-theme=light][data-accent=cyan]{--color-body-bg: radial-gradient(circle at top left, rgba(8, 145, 178, .14), transparent 34rem), radial-gradient(circle at bottom right, rgba(180, 83, 9, .16), transparent 30rem), #f6f8fb;--color-primary: #0891b2;--color-primary-hover: #0e7490;--color-primary-soft: rgba(8, 145, 178, .12);--color-primary-soft-hover: rgba(8, 145, 178, .2);--color-primary-outline: #0891b2;--color-primary-outline-hover: #0e7490;--color-eyebrow: #0e7490;--color-edit: #0891b2;--color-edit-soft: rgba(8, 145, 178, .12);--color-edit-soft-hover: rgba(8, 145, 178, .18);--diagram-open-string: #0891b2}:root[data-theme=light][data-accent=magenta]{--color-body-bg: radial-gradient(circle at top left, rgba(192, 38, 211, .14), transparent 34rem), radial-gradient(circle at bottom right, rgba(180, 83, 9, .16), transparent 30rem), #f6f8fb;--color-primary: #c026d3;--color-primary-hover: #a21caf;--color-primary-soft: rgba(192, 38, 211, .12);--color-primary-soft-hover: rgba(192, 38, 211, .2);--color-primary-outline: #c026d3;--color-primary-outline-hover: #a21caf;--color-eyebrow: #86198f;--color-edit: #c026d3;--color-edit-soft: rgba(192, 38, 211, .12);--color-edit-soft-hover: rgba(192, 38, 211, .18);--diagram-open-string: #c026d3}body{background:var(--body-bg)}:root[data-theme=light] .hero-card,:root[data-theme=light] .panel-card,:root[data-theme=light] .song-card,:root[data-theme=light] .session-card{box-shadow:var(--shadow)}:root[data-theme=light] select,:root[data-theme=light] .select-control,:root[data-theme=light] .custom-song-form select{background-image:url("data:image/svg+xml,%3Csvg width='14' height='14' viewBox='0 0 20 20' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M5 7.5L10 12.5L15 7.5' stroke='%23334155' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")}button,select,input,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed}.app-shell{min-height:100vh;color:var(--text)}.app-grid{width:min(1440px,100%);margin:0 auto;display:grid;grid-template-columns:320px 1fr;gap:24px;padding:24px}.app-grid>*{min-width:0}.sidebar,.main-content,.song-column{display:grid;min-width:0;align-content:start;gap:18px}.sidebar{position:relative;z-index:2}.main-content{position:relative;z-index:1}.top-grid{display:grid;grid-template-columns:1fr 380px;gap:24px;align-items:start}.dashboard-top-grid{align-items:start}.hero-card,.panel-card,.song-card,.session-card{border:1px solid 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svg{fill:none}.mastered-icon-button:hover{border-color:var(--color-accent);background:var(--color-accent-soft);color:var(--color-accent)}.mastered-icon-button.is-mastered{border-color:var(--color-accent);border-radius:999px;background:var(--color-accent-soft);color:var(--color-accent)}.mastered-icon-button.is-mastered svg{fill:currentColor}.dashboard-side-column{display:grid;gap:18px;min-width:0;align-content:start}.progress-badge{display:grid;width:64px;height:64px;place-items:center;border:1px solid var(--color-primary);border-radius:999px;background:var(--color-primary-soft);color:#7dd3fc;font-weight:900}.progress-badge.is-empty{border-color:#f8717173;background:var(--color-danger-soft);color:var(--color-danger-text)}.progress-badge.is-active{border-color:var(--color-accent);background:var(--color-accent-soft);color:var(--color-accent)}.progress-badge.is-complete{border-color:var(--color-success);background:var(--color-success-soft);color:var(--color-success)}.practice-summary-card{display:grid;gap:12px;margin-top:18px;border:1px solid var(--color-border);border-radius:20px;background:var(--color-surface);padding:14px}.practice-summary-card h3{margin:0;color:var(--color-text);font-size:18px;letter-spacing:-.03em}.practice-summary-card p:not(.eyebrow){margin:6px 0 0;color:var(--color-text-muted);font-size:13px;line-height:1.45}.practice-summary-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.practice-summary-stat{display:grid;gap:4px;border:1px solid var(--color-border);border-radius:16px;background:var(--color-surface-soft);padding:10px}.practice-summary-stat span{color:var(--color-text-muted);font-size:10px;font-weight:900;letter-spacing:.1em;text-transform:uppercase}.practice-summary-stat strong{color:var(--color-text);font-size:16px;line-height:1}.session-length-card{display:grid;margin-top:18px;border:1px solid var(--color-border);border-radius:20px;background:var(--color-surface);padding:14px}.session-length-actions{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.session-length-actions .ghost-button,.session-length-actions .selected-button{min-width:0;padding:9px 12px}.progress-track{height:8px;margin:18px 0;overflow:hidden;border-radius:999px;background:var(--color-track)}.progress-fill{height:100%;border-radius:inherit;background:var(--color-primary);transition:width .18s ease,background .18s ease}.progress-fill.is-empty{background:var(--color-danger)}.progress-fill.is-active{background:var(--color-accent)}.progress-fill.is-complete{background:var(--color-success)}.step-card{display:grid;gap:0;width:100%;padding:14px;color:var(--color-text);text-align:left;cursor:pointer;transition:background .18s ease,border-color .18s ease,transform .18s ease}.step-card:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}.step-card.is-expanded{border-color:var(--color-primary);background:var(--color-primary-soft)}.step-card.is-complete,.step-card.is-complete.is-expanded{border-color:var(--color-success);background:var(--color-success-soft)}.step-card-header,.transition-card div,.chord-card-header,.chord-card>div:first-child{display:flex;align-items:center;justify-content:space-between;gap:12px}.step-card-title-row{display:flex;min-width:0;flex:1 1 auto;align-items:center;justify-content:space-between;gap:12px}.step-card strong,.path-card span,.session-length-card strong{font-weight:900}.step-card small,.transition-card span,.chord-card span{color:var(--color-text-muted);font-size:12px}.step-complete-button{display:inline-grid;width:28px;height:28px;flex:0 0 28px;place-items:center;border:1px solid var(--color-border);border-radius:999px;background:var(--color-surface);color:var(--color-text-muted);padding:0;transition:background .16s ease,border-color .16s ease,color .16s ease,transform .16s ease}.step-complete-button:hover{border-color:var(--color-success);background:var(--color-success-soft);color:var(--color-success);transform:scale(1.03)}.step-complete-button.is-complete{border-color:var(--color-success);background:var(--color-success);color:#fff}.step-complete-button svg{width:15px;height:15px}.step-card-detail{max-height:0;margin:0;overflow:hidden;color:var(--color-text-muted);font-size:13px;line-height:1.45;opacity:0;transform:translateY(-2px);transition:max-height .22s ease,margin-top .22s ease,opacity .18s ease,transform .22s ease}.step-card.is-expanded .step-card-detail{max-height:120px;margin-top:8px;opacity:1;transform:translateY(0)}.step-card:hover{border-color:var(--color-border-strong)}.step-card.is-expanded,.step-card.is-expanded:hover,.step-card.is-complete.is-expanded,.step-card.is-complete.is-expanded:hover{border-color:var(--color-primary);background:var(--color-primary-soft)}.step-card.is-complete:not(.is-expanded){border-color:var(--color-success);background:var(--color-success-soft)}.step-card:not(.is-expanded) .step-complete-button:hover{border-color:var(--color-success);background:var(--color-success-soft);color:var(--color-success);transform:scale(1.03)}.step-card:not(.is-expanded) .step-complete-button.is-complete{border-color:var(--color-success);background:var(--color-success);color:#fff}.step-card.is-expanded .step-complete-button:not(.is-complete){border-color:var(--color-primary);background:transparent;color:var(--color-primary)}.step-card.is-expanded .step-complete-button:not(.is-complete):hover{border-color:var(--color-primary);background:var(--color-primary-soft);color:var(--color-primary);transform:none}.step-card.is-expanded .step-complete-button.is-complete,.step-card.is-expanded .step-complete-button.is-complete:hover{border-color:var(--color-primary);background:var(--color-primary);color:#fff;transform:none}.session-notes-block{display:grid;gap:8px}.session-notes-block span{color:var(--color-text-muted);font-size:11px;font-weight:900;letter-spacing:.1em;text-transform:uppercase}.session-notes-block textarea{width:100%;min-height:92px;resize:vertical;border:1px solid var(--color-border);border-radius:16px;background:var(--color-surface-soft);color:var(--color-text);padding:10px 12px;font:inherit;font-size:13px;line-height:1.45}.session-notes-block textarea:focus{border-color:var(--color-primary);outline:none}.complete-session-card{display:grid;gap:14px;margin-top:18px;border:1px solid var(--color-border);border-radius:22px;background:var(--color-surface);padding:16px}.complete-session-card h3{margin:0;font-size:18px;letter-spacing:-.03em}.complete-session-card p{margin:6px 0 0;color:var(--color-text-muted);font-size:13px;line-height:1.45}.session-timer-display{display:grid;gap:4px;border:1px solid var(--color-border);border-radius:20px;background:var(--color-surface-soft);padding:14px;text-align:center}.session-timer-display span{color:var(--color-text-muted);font-size:11px;font-weight:900;letter-spacing:.1em;text-transform:uppercase}.session-timer-display strong{color:var(--color-text);font-size:42px;line-height:1;font-variant-numeric:tabular-nums;letter-spacing:-.04em}.session-timer-display small{color:var(--color-text-muted);font-size:12px}.session-timer-actions,.rating-row{display:grid;gap:8px}.session-primary-action{display:inline-flex;width:100%;min-height:46px;align-items:center;justify-content:center;gap:8px}.session-primary-action svg{width:18px;height:18px;flex:0 0 auto}.session-running-actions{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.session-icon-button{display:inline-grid;min-height:46px;place-items:center;border:1px solid var(--color-border);border-radius:999px;background:var(--color-surface-subtle);color:var(--color-text-muted-strong);padding:0}.session-icon-button:hover{border-color:var(--color-primary);background:var(--color-primary-soft);color:var(--color-primary)}.session-icon-button:disabled{border-color:var(--color-border);background:var(--color-surface-soft);color:var(--color-text-muted);cursor:not-allowed;opacity:.68}.session-icon-button svg{width:20px;height:20px;flex:0 0 auto}.session-record-button:hover{border-color:var(--color-danger);background:var(--color-danger-hover);color:var(--color-danger)}.session-record-button.is-recording{border-color:var(--color-danger);background:var(--color-danger-soft);color:var(--color-danger);animation:session-record-pulse 1.15s ease-in-out infinite}.session-stop-button svg{stroke:none}.session-recording-status{margin:-2px 0 0!important;border:1px solid var(--color-border);border-radius:999px;background:var(--color-surface-soft);color:var(--color-text-muted-strong)!important;padding:8px 10px;text-align:center;font-size:12px!important;font-weight:900}.session-recording-status.is-recording{border-color:var(--color-danger);background:var(--color-danger-soft);color:var(--color-danger)!important}.session-recording-status.is-ready{border-color:var(--color-success);background:var(--color-success-soft);color:var(--color-success)!important}.session-recording-level-card{display:grid;gap:8px;margin-top:-4px;border:1px solid var(--color-border);border-radius:16px;background:var(--color-surface-soft);padding:10px 12px}.session-recording-level-header{display:flex;align-items:center;justify-content:space-between;gap:10px}.session-recording-level-icon{display:inline-grid;place-items:center;color:var(--color-text)}.session-recording-level-icon svg{width:18px;height:18px}.session-recording-level-header small{border:1px solid var(--color-border);border-radius:999px;background:var(--color-surface);color:var(--color-text-muted-strong);padding:4px 8px;font-size:10px;font-weight:900;line-height:1;text-transform:uppercase}.session-recording-mini-meter{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:2px;min-height:24px;overflow:hidden;border:1px solid var(--color-border);border-radius:999px;background:var(--color-surface);padding:3px}.session-recording-mini-bar{background:#d1d5db75;opacity:1;transition:background 80ms ease,opacity 80ms ease,transform 80ms ease}.session-recording-mini-bar:first-of-type{border-top-left-radius:999px;border-bottom-left-radius:999px}.session-recording-mini-bar:last-of-type{border-top-right-radius:999px;border-bottom-right-radius:999px}.session-recording-mini-meter.is-level-low .session-recording-mini-bar.is-level-active{background:var(--color-danger);transform:scaleY(1.03)}.session-recording-mini-meter.is-level-medium .session-recording-mini-bar.is-level-active{background:var(--color-accent);transform:scaleY(1.03)}.session-recording-mini-meter.is-level-high .session-recording-mini-bar.is-level-active{background:var(--color-success);transform:scaleY(1.03)}.session-rating-block{display:grid;gap:8px}.session-rating-label{margin:0!important;color:var(--color-eyebrow)!important;font-size:11px!important;font-weight:900;letter-spacing:.16em;line-height:1;text-align:center;text-transform:uppercase;transition:color .16s ease}.session-rating-label.is-muted{color:var(--color-text-muted)!important}.rating-row{grid-template-columns:repeat(3,1fr)}.rating-row button:disabled{border-color:var(--color-border);background:var(--color-surface-soft);color:var(--color-text-muted);cursor:not-allowed;opacity:1}.complete-session-button{border:1px solid var(--color-success-fill);border-radius:999px;background:var(--color-success-fill);color:#fff;padding:11px 14px;font-weight:900;transition:background .16s ease,border-color .16s ease,color .16s ease,transform .16s ease}.complete-session-button:hover{border-color:var(--color-success-fill-hover);background:var(--color-success-fill-hover);color:#fff}.complete-session-button:disabled{border-color:var(--color-border);background:var(--color-surface-soft);color:var(--color-text-muted);opacity:1;cursor:not-allowed}.session-message{border:1px solid rgba(52,211,153,.32);border-radius:16px;background:var(--color-success-soft);color:var(--color-success)!important;padding:10px 12px;font-weight:800}@keyframes session-record-pulse{0%,to{box-shadow:0 0 #f8717100}50%{box-shadow:0 0 0 6px #f871711f}}.chord-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:16px}.chord-card,.transition-card,.song-section-card{padding:14px}.chord-card{display:grid;gap:14px}.chord-card strong{margin-right:5px;font-size:26px}.chord-card p.chord-detail{margin:4px 0}.chord-card-header{display:flex;align-items:center;justify-content:space-between;gap:16px}.chord-card-header>div{min-width:0}.chord-audio-button{display:inline-grid;width:42px;min-width:42px;height:42px;flex:0 0 42px;place-items:center;border:1px solid var(--color-border);border-radius:999px;background:var(--color-surface-subtle);color:var(--color-text-muted-strong);padding:0}.chord-audio-button:hover{border-color:var(--color-primary);background:var(--color-primary-soft);color:var(--color-primary)}.chord-audio-button.is-playing{border-color:var(--color-success);background:var(--color-success-soft);color:var(--color-success)}.chord-audio-button svg{width:18px;height:18px;fill:currentColor;transform:translate(1px)}.chord-diagram{display:grid;justify-items:center;gap:8px;border:1px solid var(--color-border);border-radius:18px;background:var(--diagram-bg);padding:12px}.chord-diagram-empty{min-height:170px;place-items:center;color:var(--color-text-muted);font-size:13px;font-weight:800}.chord-diagram-name{color:var(--color-text);font-size:15px;font-weight:900}.chord-diagram svg{width:min(100%,180px);height:auto}.guitar-string{stroke:var(--diagram-string);stroke-width:1.6;stroke-linecap:round}.guitar-fret{stroke:var(--diagram-fret);stroke-width:1.6;stroke-linecap:round}.guitar-nut{stroke:var(--diagram-nut);stroke-width:5;stroke-linecap:round}.open-string{fill:transparent;stroke:var(--diagram-open-string);stroke-width:2}.string-marker{fill:var(--diagram-muted-string);font-size:17px;font-weight:900;text-anchor:middle;dominant-baseline:auto}.fretted-note{fill:var(--color-primary);stroke:#fff6;stroke-width:1}.finger-label{fill:var(--diagram-finger-label);font-size:10px;font-weight:900;text-anchor:middle}.fret-label{fill:var(--color-text-muted);font-size:11px;font-weight:900}.detail-section-card{min-height:420px}.detail-section-header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.transition-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.transition-card input{width:100%;margin-top:14px;accent-color:var(--color-primary)}.strum-pill{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--color-border);border-radius:18px;padding:9px 12px;color:var(--color-text-muted-strong);font-size:13px;font-weight:800}.strum-pill>span:first-child{color:var(--color-text-muted-strong)}.song-section-card{display:grid;gap:8px}:root[data-theme=light] .song-section-card{border-color:var(--color-border-strong)}.song-section-card span{color:var(--color-eyebrow);font-size:12px;font-weight:900;letter-spacing:.12em;text-transform:uppercase}:root[data-theme=light] .song-section-card span{color:var(--color-eyebrow)}.song-section-card strong{font-size:18px}.session-history-card{display:grid;gap:18px}.history-summary-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.history-summary-card{display:grid;gap:4px;border:1px solid var(--color-border);border-radius:18px;background:var(--color-surface);padding:14px}.history-summary-card strong{display:block;color:var(--color-text);font-size:28px;font-weight:900;line-height:1;letter-spacing:-.04em}.history-summary-card span{color:var(--color-text-muted-strong);font-size:12px;font-weight:900;letter-spacing:.08em;text-transform:uppercase}.history-summary-card small{color:var(--color-text-muted);font-size:12px;line-height:1.35}.history-summary-card--green{border-color:var(--color-success);background:var(--color-success-soft)}.history-summary-card--green strong{color:var(--color-success)}.history-summary-card--muted strong{color:var(--color-text-muted-strong)}.history-streak-card{display:grid;grid-template-columns:1fr auto;gap:18px;align-items:center;border:1px solid var(--color-border);border-radius:22px;background:var(--color-surface);padding:16px}.history-streak-card h3{margin:0;color:var(--color-text);font-size:24px;letter-spacing:-.04em}.history-streak-card p:not(.eyebrow){margin:8px 0 0;color:var(--color-text-muted);font-size:13px;line-height:1.5}.history-streak-meta{display:grid;min-width:180px;gap:4px;border:1px solid var(--color-border);border-radius:18px;background:var(--color-surface-soft);padding:14px;text-align:right}.history-streak-meta span{color:var(--color-text-muted);font-size:11px;font-weight:900;letter-spacing:.1em;text-transform:uppercase}.history-streak-meta strong{color:var(--color-text);font-size:24px;line-height:1}.history-streak-meta small{color:var(--color-text-muted);font-size:12px}.history-active-song-filter{display:grid;grid-template-columns:minmax(0,1fr) auto auto;align-items:center;gap:12px;border:1px solid var(--color-border);border-radius:18px;background:var(--color-surface-soft);padding:12px 14px}.history-active-song-filter-main{display:grid;min-width:0;gap:3px}.history-active-song-filter-main span{color:var(--color-text-muted);font-size:11px;font-weight:900;letter-spacing:.1em;text-transform:uppercase}.history-active-song-filter-main strong{color:var(--color-edit);font-size:15px;font-weight:900}.history-active-song-filter-stats{display:flex;align-items:center;justify-content:flex-end;gap:8px;flex-wrap:wrap}.history-active-song-filter-stats span{border:1px solid var(--color-border);border-radius:999px;background:var(--color-surface);color:var(--color-text-muted-strong);padding:6px 10px;font-size:12px;font-weight:800;white-space:nowrap}.history-clear-song-filter-button{min-height:34px;padding:7px 12px;font-size:12px}.history-controls{display:grid;grid-template-columns:minmax(220px,1fr) minmax(180px,220px);gap:10px;align-items:end;border:1px solid var(--color-border);border-radius:18px;background:var(--color-surface);padding:12px}.history-search-field,.history-sort-field{display:grid;gap:6px}.history-search-field span,.history-sort-field span{color:var(--color-text-muted);font-size:11px;font-weight:900;letter-spacing:.1em;line-height:1;text-transform:uppercase}.history-search-field input,.history-sort-field select{width:100%;border:1px solid var(--color-border);border-radius:14px;background-color:var(--color-surface-soft);color:var(--color-text);padding:10px 12px;font:inherit;font-size:13px;font-weight:800}.history-search-field input:focus,.history-sort-field select:focus{border-color:var(--color-primary);outline:none}.history-action-message{margin:0;border-radius:999px;padding:9px 12px;text-align:center;font-size:12px;font-weight:900}.history-action-message--success{border:1px solid var(--color-success);background:var(--color-success-soft);color:var(--color-success)}.history-action-message--danger{border:1px solid var(--color-danger);background:var(--color-danger-soft);color:var(--color-danger-text)}.history-day-group-list{display:grid;gap:16px}.history-day-group-list.is-scrollable{--history-card-estimated-height: 148px;--history-card-gap: 10px;--history-day-header-height: 58px;max-height:calc(var(--history-day-header-height) + (var(--history-card-estimated-height) * 4) + (var(--history-card-gap) * 4) + 4px);overflow-y:auto;padding-right:16px;scrollbar-gutter:stable}.history-day-group-list.is-scrollable>.history-day-group{margin-right:4px}.history-day-group{display:grid;gap:10px}.history-day-header{display:flex;align-items:center;justify-content:space-between;gap:12px;border:1px solid var(--color-border);border-radius:18px;background:var(--color-surface-soft);padding:12px 14px}.history-day-header>div{display:grid;gap:2px}.history-day-header strong{color:var(--color-text);font-size:15px}.history-day-header small{color:var(--color-text-muted);font-size:12px;font-weight:800}.history-day-header span{border:1px solid var(--color-success);border-radius:999px;background:var(--color-success-soft);color:var(--color-success);padding:6px 10px;font-size:12px;font-weight:900}.history-list{display:grid;gap:10px}.history-card{display:grid;gap:12px;border:1px solid var(--color-border);border-radius:18px;background:var(--color-surface);padding:14px}.history-card-header{display:flex;justify-content:space-between;gap:12px}.history-card-header>div{display:grid;min-width:0;gap:4px}.history-card strong{color:var(--color-text);font-size:17px}.history-card-header small,.history-card-header span{color:var(--color-text-muted);font-size:13px}.history-card-date{justify-items:end;text-align:right}.history-card-date small{font-size:12px}.history-card-footer{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.history-card-metrics{display:flex;flex-wrap:wrap;gap:8px}.history-card-metrics span{border:1px solid var(--color-border);border-radius:999px;background:var(--color-surface-soft);color:var(--color-text-muted-strong);padding:6px 10px;font-size:12px;font-weight:800}.history-card-metrics .history-recording-missing-pill{border-color:var(--color-danger);background:var(--color-danger-soft);color:var(--color-danger-text)}.history-recording-actions{display:grid;flex:0 0 auto;justify-items:end;gap:6px}.history-recording-controls{display:flex;align-items:center;justify-content:flex-end;gap:6px}.history-recording-button{display:inline-flex;min-height:36px;align-items:center;justify-content:center;gap:6px;border:1px solid var(--color-neutral-action);border-radius:999px;background:transparent;color:var(--color-neutral-action);padding:7px 11px;font-size:12px;font-weight:900}.history-recording-button:not(:disabled):not(.is-playing):not(.is-replay):hover{border-color:var(--color-success-outline);background:transparent;color:var(--color-success-outline)}.history-recording-button:disabled,.history-recording-stop-button:disabled{border-color:var(--color-border);background:var(--color-surface-soft);color:var(--color-text-muted);cursor:not-allowed}.history-recording-button:disabled{cursor:wait}.history-recording-button.is-playing{border-color:var(--color-success);background:transparent;color:var(--color-success)}.history-recording-button.is-replay,.history-recording-button.is-paused{border-color:var(--color-accent);background:transparent;color:var(--color-accent)}.history-recording-stop-button,.history-recording-download-button,.history-recording-delete-button{display:inline-grid;width:36px;min-width:36px;min-height:36px;place-items:center;border-radius:999px;padding:0}.history-recording-stop-button{border:1px solid var(--color-border);background:var(--color-surface-subtle);color:var(--color-text-muted-strong)}.history-recording-download-button{border:1px solid var(--color-neutral-action);background:transparent;color:var(--color-neutral-action)}.history-recording-delete-button{border:1px solid var(--color-danger);background:transparent;color:var(--color-danger)}.history-recording-delete-button:hover{background:var(--color-danger-hover)}.history-recording-button svg,.history-recording-stop-button svg,.history-recording-download-button svg,.history-recording-delete-button svg{width:15px;height:15px;flex:0 0 auto}.history-recording-button svg.history-replay-icon{width:20px;height:20px}.history-recording-stop-button svg{stroke:none}.history-playback-message{margin:0;color:var(--color-text-muted);font-size:12px;font-weight:400;line-height:1.35;text-align:right}.history-empty{display:grid;gap:8px;border:1px dashed 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