/* Shared roles keep lessons, account pages and SVG charts readable in every palette. */
:root{--sidebar:#0c131d;--input:#101b28;--line-strong:#475b72;--raised-hover:#253649;--on-accent:#14251c;--accent-soft:#24372b;--accent-line:#546b48;--hero-start:#233a36;--hero-mid:#1e3233;--hero-end:#162b2d;--chart-bg:#111d29;--chart-grid:#354858;--chart-text:#a3b0bf;--chart-marker:#758d9c;--chart-level:#b9cedc;--on-chart-level:#101824;--up:#8ecdb2;--down:#e794a3;--success-soft:#254236;--success-line:#4b7959;--success-text:#d5f0d9;--danger-soft:#3b2931;--danger-line:#9a6474;--danger-text:#ffd6dc;--warning-soft:#2e2b22;--warning-line:#756445;--warning-text:#e8d4ac;--toast-bg:#e4eedb;--toast-text:#193022}
:root[data-theme="rose"]{color-scheme:light;--bg:#fff2f7;--sidebar:#fbe6ef;--surface:#ffffff;--raised:#f9e3ed;--raised-hover:#f3d3e2;--input:#fffafd;--line:#e2b5c9;--line-strong:#a8778d;--text:#3b2030;--muted:#745064;--accent:#9f285d;--on-accent:#ffffff;--accent-soft:#f9deeb;--accent-line:#ad4b76;--hero-start:#ffe2ee;--hero-mid:#fcecf3;--hero-end:#fff9fc;--chart-bg:#fffafd;--chart-grid:#dec3d1;--chart-text:#745064;--chart-marker:#936a81;--chart-level:#755169;--on-chart-level:#ffffff;--up:#187149;--down:#b53a5b;--teal:#146d62;--red:#b53a5b;--gold:#87600e;--success-soft:#e5f4ea;--success-line:#62977a;--success-text:#225b3c;--danger-soft:#fbe5eb;--danger-line:#be637b;--danger-text:#972346;--warning-soft:#fff0d6;--warning-line:#aa8843;--warning-text:#705014;--toast-bg:#3b2030;--toast-text:#ffffff}
:root[data-theme="bleu"]{color-scheme:dark;--bg:#0c192b;--sidebar:#091323;--surface:#13243a;--raised:#1b304b;--raised-hover:#26415f;--input:#0c1b30;--line:#304963;--line-strong:#56728e;--text:#edf5ff;--muted:#afc3dc;--accent:#9acbff;--on-accent:#0b223e;--accent-soft:#213d5d;--accent-line:#577da6;--hero-start:#1a3c62;--hero-mid:#16324f;--hero-end:#13263f;--chart-bg:#0c1b30;--chart-grid:#304963;--chart-text:#afc3dc;--chart-marker:#8aa6c8;--chart-level:#b6cbe5;--on-chart-level:#0b223e;--toast-bg:#d6e9ff;--toast-text:#0b223e}
:root[data-theme="noir"]{color-scheme:dark;--bg:#090909;--sidebar:#050505;--surface:#161616;--raised:#242424;--raised-hover:#333333;--input:#101010;--line:#383838;--line-strong:#666666;--text:#f5f5f5;--muted:#b6b6b6;--accent:#eeeeee;--on-accent:#111111;--accent-soft:#292929;--accent-line:#777777;--hero-start:#292929;--hero-mid:#222222;--hero-end:#161616;--chart-bg:#101010;--chart-grid:#383838;--chart-text:#b6b6b6;--chart-marker:#888888;--chart-level:#cccccc;--on-chart-level:#111111;--toast-bg:#eeeeee;--toast-text:#111111}
:root[data-theme="blanc"]{color-scheme:light;--bg:#ffffff;--sidebar:#f4f5f7;--surface:#ffffff;--raised:#eef1f5;--raised-hover:#e1e6ed;--input:#f8fafc;--line:#cdd4de;--line-strong:#8b96a5;--text:#182231;--muted:#566274;--accent:#26364b;--on-accent:#ffffff;--accent-soft:#e8edf3;--accent-line:#78889c;--hero-start:#eef2f7;--hero-mid:#f5f7fa;--hero-end:#ffffff;--chart-bg:#f8fafc;--chart-grid:#ced6df;--chart-text:#566274;--chart-marker:#748297;--chart-level:#52647b;--on-chart-level:#ffffff;--up:#187149;--down:#b53a5b;--teal:#146d62;--red:#b53a5b;--gold:#87600e;--success-soft:#e5f4ea;--success-line:#62977a;--success-text:#225b3c;--danger-soft:#fbe5eb;--danger-line:#be637b;--danger-text:#972346;--warning-soft:#fff0d6;--warning-line:#aa8843;--warning-text:#705014;--toast-bg:#26364b;--toast-text:#ffffff}
.topbar{min-height:82px;height:auto;padding-top:14px;padding-bottom:14px;flex-wrap:wrap}.toptools{gap:14px;flex-wrap:wrap}.theme-picker{display:flex;align-items:center;gap:7px;font-size:11px;color:var(--muted)}.theme-picker select{width:auto;min-width:88px;min-height:36px;padding:6px 9px;font-size:12px;color:var(--text)}
.theme-choices{border:0;padding:0;margin:0;min-width:0}.theme-choices legend{font-size:19px;font-weight:600;letter-spacing:-.4px;padding:0}.theme-choices p{margin:8px 0 18px}.theme-options{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px}.theme-choice{display:flex;align-items:center;gap:10px;position:relative;border:1px solid var(--line-strong);border-radius:12px;padding:14px 12px;cursor:pointer;background:var(--surface)}.theme-choice:has(input:checked){border:2px solid var(--accent);padding:13px 11px;background:var(--accent-soft)}.theme-choice:has(input:focus-visible){outline:2px solid var(--accent);outline-offset:4px}.theme-choice input{position:absolute;opacity:0;width:1px;height:1px;min-height:0;padding:0;inset:0;pointer-events:none}.theme-swatch{width:27px;height:27px;flex-shrink:0;border-radius:50%;background:var(--swatch);border:1px solid #818181;box-shadow:inset 0 0 0 3px #ffffff55}.theme-choice strong{display:block;font-size:13px}.theme-choice small{display:block;font-size:10px;line-height:1.5;color:var(--muted);margin-top:2px}
@media(max-width:1200px){.theme-options{grid-template-columns:repeat(3,minmax(0,1fr))}.toptools{gap:10px}}
@media(max-width:720px){.topbar{gap:10px}.toptools{margin-left:auto;gap:8px}.theme-options{grid-template-columns:repeat(2,minmax(0,1fr))}.theme-choice:last-child{grid-column:1/-1}.theme-picker select{min-width:80px}.theme-picker>span{display:none}}