:root {
  --menu-bg: #f3e8d2;
  --menu-surface: #fffaf0;
  --menu-surface-2: #ead8b8;
  --menu-text: #35291f;
  --menu-muted: #756452;
  --menu-line: #d6c19e;
  --menu-accent: #0b8078;
  --menu-accent-2: #075e59;
  --menu-shadow: 0 18px 55px rgba(87, 58, 28, 0.11);
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

:root[data-theme="light"] {
  --menu-bg: #f4f7f8;
  --menu-surface: #ffffff;
  --menu-surface-2: #e7f2f1;
  --menu-text: #142126;
  --menu-muted: #5f7076;
  --menu-line: #d7e1e4;
  --menu-shadow: 0 18px 55px rgba(20, 33, 38, 0.09);
}

:root[data-theme="dark"] {
  --menu-bg: #0b0c0e;
  --menu-surface: #151619;
  --menu-surface-2: #1c2827;
  --menu-text: #f2f6f4;
  --menu-muted: #a9b5b1;
  --menu-line: #2b3a38;
  --menu-accent: #4fd1c5;
  --menu-accent-2: #8ce6de;
  --menu-shadow: 0 18px 55px rgba(0, 0, 0, 0.28);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--menu-bg); }
body { min-width: 320px; margin: 0; color: var(--menu-text); background: var(--menu-bg); line-height: 1.55; overflow-x: hidden; }
body.modal-open { overflow: hidden; }
button, input { font: inherit; }
a { color: inherit; }
.skip-link { position: fixed; left: 12px; top: -80px; z-index: 300; padding: 10px 14px; border-radius: 10px; background: var(--menu-text); color: var(--menu-bg); font-weight: 800; }
.skip-link:focus { top: 12px; }

.menu-toolbar {
  position: sticky;
  top: 0;
  z-index: 90;
  display: grid;
  grid-template-columns: auto minmax(180px, 520px) auto;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 12px max(16px, calc((100% - 1180px) / 2));
  border-bottom: 1px solid var(--menu-line);
  background: color-mix(in srgb, var(--menu-bg) 88%, transparent);
  backdrop-filter: blur(16px);
  transition: opacity 190ms ease, transform 190ms ease, visibility 190ms step-start;
}
.menu-toolbar.is-scroll-hidden { opacity: 0; visibility: hidden; pointer-events: none; transform: translateY(-105%); transition: opacity 190ms ease, transform 190ms ease, visibility 190ms step-end; }
.menu-brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 900; text-decoration: none; white-space: nowrap; }
.menu-brand img { width: 42px; height: 42px; border-radius: 50%; border: 2px solid var(--menu-accent); }
.menu-search { position: relative; }
.menu-search input { width: 100%; min-height: 46px; padding: 11px 42px 11px 16px; border: 1px solid var(--menu-line); border-radius: 999px; color: var(--menu-text); background: var(--menu-surface); outline: none; }
.menu-search input:focus { border-color: var(--menu-accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--menu-accent) 18%, transparent); }
.menu-search svg { position: absolute; right: 15px; top: 50%; width: 20px; transform: translateY(-50%); color: var(--menu-muted); }
.menu-toolbar-actions { display: flex; justify-content: flex-end; gap: 8px; }
.menu-control, .menu-link {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 9px 14px;
  border: 1px solid var(--menu-line);
  border-radius: 999px;
  color: var(--menu-text);
  background: var(--menu-surface);
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
}
.menu-control:hover, .menu-control:focus-visible, .menu-link:hover, .menu-link:focus-visible { border-color: var(--menu-accent); color: var(--menu-accent-2); outline: none; }

.menu-shell { width: min(1100px, calc(100% - 32px)); margin: 0 auto; padding: clamp(32px, 6vw, 72px) 0 60px; }
.menu-hero { max-width: 810px; margin: 0 auto clamp(30px, 5vw, 54px); text-align: center; }
.menu-kicker { margin: 0 0 12px; color: var(--menu-accent-2); font-size: 0.78rem; font-weight: 900; letter-spacing: 0.13em; text-transform: uppercase; }
.menu-hero h1 { margin: 0; font-size: clamp(2.35rem, 7vw, 5.2rem); line-height: 0.98; letter-spacing: -0.055em; }
.menu-lead { max-width: 660px; margin: 20px auto 0; color: var(--menu-muted); font-size: clamp(1rem, 2vw, 1.12rem); }
.menu-stats { display: flex; flex-wrap: wrap; justify-content: center; gap: 9px; margin-top: 24px; }
.menu-stat { padding: 8px 12px; border: 1px solid var(--menu-line); border-radius: 999px; color: var(--menu-muted); background: var(--menu-surface); font-size: 0.86rem; font-weight: 800; }
.menu-stat strong { color: var(--menu-text); }

.category-list { display: grid; gap: 18px; }
.quiz-category { border: 1px solid var(--menu-line); border-radius: 22px; background: var(--menu-surface); box-shadow: var(--menu-shadow); overflow: clip; }
.quiz-category > summary { min-height: 66px; display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 16px 20px; cursor: pointer; list-style: none; font-weight: 900; }
.quiz-category > summary::-webkit-details-marker { display: none; }
.quiz-category > summary::after { content: "+"; color: var(--menu-accent); font-size: 1.5rem; font-weight: 500; }
.quiz-category[open] > summary::after { content: "−"; }
.category-label { min-width: 0; }
.category-label span { display: block; overflow-wrap: anywhere; }
.category-label small { display: block; margin-top: 3px; color: var(--menu-muted); font-weight: 700; }
.quiz-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; padding: 0 16px 16px; }
.quiz-item { min-width: 0; display: grid; grid-template-columns: 50px minmax(0, 1fr) auto; align-items: start; gap: 14px; padding: 18px; border: 1px solid var(--menu-line); border-radius: 17px; color: var(--menu-text); background: var(--menu-bg); text-decoration: none; transition: border-color 170ms ease, transform 170ms ease, box-shadow 170ms ease; }
.quiz-item:hover, .quiz-item:focus-visible { border-color: var(--menu-accent); transform: translateY(-2px); box-shadow: 0 12px 30px color-mix(in srgb, var(--menu-accent) 13%, transparent); outline: none; }
.quiz-icon { width: 50px; height: 50px; display: grid; place-items: center; border-radius: 14px; color: var(--menu-accent-2); background: var(--menu-surface-2); font-size: 0.7rem; font-weight: 950; }
.quiz-details { min-width: 0; }
.quiz-title { display: block; margin-bottom: 5px; font-weight: 900; line-height: 1.28; overflow-wrap: anywhere; }
.quiz-meta { display: block; color: var(--menu-muted); font-size: 0.78rem; font-weight: 750; }
.quiz-card-description { display: -webkit-box; margin-top: 10px; color: var(--menu-muted); font-size: 0.87rem; line-height: 1.5; overflow: hidden; -webkit-line-clamp: 3; -webkit-box-orient: vertical; }
.quiz-card-description .description-line { display: inline; }
.quiz-card-description .description-lead { color: var(--menu-text); font-weight: 900; }
.quiz-card-description .description-line + .description-line::before { content: " "; }
.quiz-action { align-self: center; color: var(--menu-accent-2); font-size: 0.76rem; font-weight: 900; }
.empty-state { margin: 30px 0; padding: 28px; border: 1px dashed var(--menu-line); border-radius: 18px; color: var(--menu-muted); text-align: center; }

.menu-cross-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 9px; margin: 34px 0; }
.menu-founder { display: grid; grid-template-columns: minmax(0, 1fr) 190px; align-items: center; gap: 28px; margin-top: 40px; padding: clamp(24px, 5vw, 42px); border: 1px solid var(--menu-line); border-radius: 26px; background: var(--menu-surface); }
.menu-founder h2 { margin: 6px 0 12px; font-size: clamp(1.7rem, 4vw, 2.7rem); line-height: 1.05; }
.menu-founder p { color: var(--menu-muted); }
.menu-founder img { width: 190px; height: 190px; border-radius: 22px; background: var(--menu-surface-2); object-fit: contain; object-position: center bottom; }

.menu-modal { position: fixed; inset: 0; z-index: 200; display: grid; place-items: center; padding: 18px; background: rgba(4, 10, 9, 0.72); backdrop-filter: blur(5px); }
.menu-modal[hidden] { display: none; }
.menu-modal-card { width: min(620px, 100%); max-height: min(88vh, 760px); overflow: auto; padding: 24px; border: 1px solid var(--menu-line); border-radius: 22px; color: var(--menu-text); background: var(--menu-surface); box-shadow: 0 30px 100px rgba(0, 0, 0, 0.35); }
.menu-modal-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.menu-modal-head h2 { margin: 0; font-size: clamp(1.45rem, 5vw, 2.2rem); line-height: 1.15; }
.modal-close { width: 44px; height: 44px; flex: 0 0 auto; border: 1px solid var(--menu-line); border-radius: 50%; color: var(--menu-text); background: transparent; font-size: 1.35rem; cursor: pointer; }
.modal-meta { display: flex; flex-wrap: wrap; gap: 8px; margin: 15px 0; color: var(--menu-muted); font-size: 0.84rem; font-weight: 800; }
.modal-description { color: var(--menu-muted); }
.modal-description p { margin: 0 0 0.85rem; }
.modal-description p:first-child { color: var(--menu-text); }
.modal-settings { display: grid; gap: 12px; margin: 20px 0; padding: 16px; border-radius: 16px; background: var(--menu-bg); }
.setting-row { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.setting-row label { font-weight: 800; }
.setting-row input[type="number"] { width: 105px; min-height: 42px; padding: 8px 10px; border: 1px solid var(--menu-line); border-radius: 10px; color: var(--menu-text); background: var(--menu-surface); }
.modal-help { margin: -4px 0 0; color: var(--menu-muted); font-size: 0.82rem; }
.start-quiz { width: 100%; min-height: 52px; border: 0; border-radius: 999px; color: #fff; background: var(--menu-accent-2); font-weight: 900; cursor: pointer; }
.recent-list { display: grid; gap: 8px; margin-top: 18px; }
.recent-item { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 12px; padding: 12px; border: 1px solid var(--menu-line); border-radius: 13px; background: var(--menu-bg); }
.recent-item strong { overflow-wrap: anywhere; }
.recent-item span { color: var(--menu-muted); font-size: 0.8rem; }

@media (max-width: 860px) {
  .menu-toolbar { grid-template-columns: auto 1fr; }
  .menu-search { grid-column: 1 / -1; grid-row: 2; }
  .menu-toolbar-actions { min-width: 0; }
  .menu-toolbar-actions .menu-link { display: none; }
  .quiz-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .menu-toolbar { gap: 9px; padding: 10px 12px; }
  .menu-brand span { display: none; }
  .menu-toolbar-actions { gap: 6px; }
  .menu-control { min-width: 44px; padding-inline: 11px; }
  .menu-control .control-label { display: none; }
  .menu-shell { width: min(100% - 22px, 1100px); padding-top: 30px; }
  .quiz-category > summary { padding-inline: 15px; }
  .quiz-grid { padding: 0 10px 10px; }
  .quiz-item { grid-template-columns: 42px minmax(0, 1fr); padding: 14px; gap: 11px; }
  .quiz-icon { width: 42px; height: 42px; }
  .quiz-action { display: none; }
  .menu-founder { grid-template-columns: 1fr; text-align: center; }
  .menu-founder img { width: 170px; height: 170px; margin: 0 auto; }
  .menu-modal-card { padding: 18px; }
}

@media (max-width: 350px) {
  .menu-control { padding-inline: 9px; }
  .quiz-item { grid-template-columns: 1fr; }
  .quiz-icon { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .menu-toolbar, .quiz-item { transition: none; }
}