:root{color-scheme:light;--caption:15px;--on-accent:#fffefa;--focus:#416b4d}
:root[data-theme=dark]{color-scheme:dark;--canvas:#212824;--surface:#29322b;--ink:#f0f1e8;--muted:#b9c3b7;--line:#4a584c;--accent:#b6cfa7;--accent-hover:#cbe0bd;--accent-soft:#303e33;--danger:#f0b0a6;--success:#b5d4b1;--warning:#e3cd93;--on-accent:#1d2b20;--focus:#d6e8c8}
:focus-visible{outline:3px solid var(--focus);outline-offset:4px}.button{color:var(--on-accent)}.button:hover,.button:disabled:hover{color:var(--on-accent)}.button.secondary,.button.secondary:disabled:hover{color:var(--ink)}.menu-toggle,.workspace-menu-toggle,.lesson-menu-toggle,.link-button{color:var(--ink)}
.header{display:flex;height:auto;min-height:98px;flex-wrap:wrap;padding-block:16px;gap:12px 24px}.header #main-nav{gap:24px}.nav-account{margin-left:0}.appearance-controls{display:flex;align-items:center;gap:10px;font-size:15px}.appearance-controls a{display:flex;align-items:center;justify-content:center;min-height:44px;min-width:44px}.appearance-controls label{margin:0}.appearance-controls select{width:auto;min-width:108px;min-height:44px;padding:8px 26px 8px 10px;font-size:15px;background:transparent;border:1px solid var(--line)}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.announcement{background:transparent;border-bottom:1px solid var(--line);color:var(--muted);padding:12px 24px;font-size:15px;line-height:1.5}.demo-bar{background:var(--accent-soft);color:var(--muted);font-size:14px}.eyebrow,.hero .eyebrow,.landing-kicker,.landing-action-note,.practice-sheet figcaption,.practice-label,.practice-next,.landing-module>.module-code,.landing-module-meta,.landing-method-list li>span,.course-meta,.course-bottom>span,.results-label,.board-top,.hero-note{font-size:15px!important}.status,.cover-tag,.course-cover .module-code,.admin-summary span,.admin-summary+.subtle{font-size:14px}.workspace-content .subtle,.my-module p,.work-row{font-size:15px}.table-wrap table{font-size:15px}.brand-type span{font-size:15px}.footer .ecosystem-link{min-height:44px;display:inline-flex;align-items:center}.course-cover .module-code{position:static;margin-bottom:12px}.course-cover{min-height:170px}.learning-language{border-left:3px solid var(--line);padding:12px 16px;font-size:16px;color:var(--muted);margin-bottom:24px;max-width:65ch}
:root[data-theme=dark] .continue-panel,:root[data-theme=dark] .notice,:root[data-theme=dark] .form-panel,:root[data-theme=dark] .lesson-format,:root[data-theme=dark] .prompt-block,:root[data-theme=dark] .purchase-panel,:root[data-theme=dark] .support-note,:root[data-theme=dark] .course-cover,:root[data-theme=dark] .module-stamp,:root[data-theme=dark] .sidebar a[aria-current],:root[data-theme=dark] .connect-panel,:root[data-theme=dark] .connect-card{background:var(--accent-soft);color:var(--ink);border-color:var(--line)}
:root[data-theme=dark] .form-panel input,:root[data-theme=dark] .form-panel textarea,:root[data-theme=dark] .form-panel select{background:var(--surface)}:root[data-theme=dark] .brand-symbol{background:#e8eddf;border-radius:6px;padding:3px}:root[data-theme=dark] .course-card,:root[data-theme=dark] .practice-board,:root[data-theme=dark] .result-paper{background:var(--surface);color:var(--ink);border-color:var(--line)}:root[data-theme=dark] .status{background:var(--accent-soft);color:var(--ink)}
@media(max-width:1100px){.appearance-controls{margin-left:auto}.header #main-nav{gap:18px}.header{padding-inline:32px}.header .product-switch{order:3}.header #main-nav{order:4}}
@media(max-width:760px){.header{padding:14px 20px}.appearance-controls{width:auto;justify-content:flex-end;border:0;padding:0}.header .product-switch{order:3;width:100%}.header #main-nav{order:4}.menu-toggle{margin-left:auto;font-size:16px}.header .wordmark{margin:0}.announcement{text-align:left;padding:12px 20px}.landing-hero{padding-top:32px}.learning-language{font-size:16px}.table-wrap table{font-size:14px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}}

:root[data-theme=dark] .brand-lockup{background:#f6f5f0;border-radius:4px;padding:4px 6px;box-sizing:content-box}.header .wordmark{min-width:0}.header .brand-lockup{width:min(190px,45vw);height:auto}@media(max-width:760px){.header .product-switch{flex:1 1 100%;min-width:0}.header .appearance-controls{order:2}.header .product-switch a{padding-inline:8px}.header #main-nav.open{width:calc(100% - 40px);max-width:none;left:20px;right:20px}}
/* Compact, accessible appearance control. */
.theme-toggle{display:inline-flex;align-items:center;justify-content:center;flex:none;width:44px;height:44px;min-width:44px;min-height:44px;padding:10px;border:1px solid transparent;border-radius:6px;background:transparent;color:inherit;cursor:pointer;transition:background-color 140ms,border-color 140ms}.theme-toggle:hover{background:color-mix(in srgb,currentColor 8%,transparent);border-color:color-mix(in srgb,currentColor 20%,transparent)}.theme-toggle:focus-visible{outline:3px solid var(--focus,currentColor);outline-offset:3px}.theme-toggle:active{transform:translateY(1px)}.theme-toggle:disabled{opacity:.45;cursor:not-allowed}.theme-toggle svg{width:20px;height:20px;pointer-events:none}.preferences .locale,.preferences .language-link,.preferences>[lang],.appearance-controls>[lang]{padding-inline:10px;white-space:nowrap}.appearance-controls,.preferences{gap:6px}@media(prefers-reduced-motion:reduce){.theme-toggle{transition:none;transform:none}}

.header .wordmark { order:0; }
.header .appearance-controls { flex:0 0 auto; justify-self:end; align-self:center; }
@media (min-width:1101px) {
  .header .product-switch { order:1; }
  .header #main-nav { order:2; }
  .header .appearance-controls { order:3; }
}
@media (max-width:1100px) {
  .header .appearance-controls { order:1; margin-left:auto; }
}
@media (max-width:760px) {
  .header { display:grid; grid-template-columns:minmax(0,1fr) auto; gap:10px 12px; }
  .header .wordmark { grid-row:1; grid-column:1; }
  .header .appearance-controls { grid-row:1; grid-column:2; margin-left:0; }
  .header .product-switch { grid-row:2; grid-column:1 / -1; }
  .header #main-nav { grid-row:3; grid-column:1 / -1; }
}
@media (max-width:355px) {
  .header { padding-inline:14px; }
  .header .appearance-controls { gap:2px; }
  .header .appearance-controls>[lang] { padding-inline:5px; }
}

@media (min-width:761px) and (max-width:1100px) {
  .header { display:grid; grid-template-columns:1fr auto; }
  .header .wordmark { grid-column:1; grid-row:1; }
  .header .appearance-controls { grid-column:2; grid-row:1; margin:0; }
  .header .product-switch { grid-column:1; grid-row:2; }
  .header #main-nav { grid-column:2; grid-row:2; }
}
@media (max-width:760px) {
  .header #main-nav {
    position:static; display:flex; flex-wrap:wrap; justify-content:space-between;
    gap:0 8px; margin:0; padding:0; background:transparent;
    box-shadow:none; border:0; font-size:14px;
  }
  .header #main-nav a { padding:3px 0; line-height:1.3; }
}
.header #main-nav a:hover { text-decoration:underline; text-underline-offset:4px; }
.header #main-nav a:active { opacity:.75; }