/* Schachmeister – Schach lernen & spielen. Mobile-first, warme Holzbrett-Identität. */

:root {
  --bg: #f6ecd9;
  --bg-elev: #fffaf0;
  --ink: #2b2015;
  --ink-soft: #6e5c46;
  --line: #e3d2b4;
  --accent: #7a2e2e;
  --accent-ink: #fff8ee;
  --accent-soft: #f0dcc8;
  --good: #3d7a3f;
  --bad: #a83a2e;
  --chip: #ece0c8;
  --shadow: 0 2px 10px rgba(70, 45, 10, 0.1);
  --radius: 14px;

  --sq-light: #eddcb0;
  --sq-dark: #b5793c;
  --sq-light-select: #f5ec7a;
  --sq-dark-select: #d8c34f;
  --sq-move-dot: rgba(60, 40, 10, 0.35);
  --sq-last: rgba(122, 46, 46, 0.35);
  --sq-check: rgba(200, 40, 30, 0.55);
  --piece-white-fill: #fbf3e2;
  --piece-white-stroke: #4a3520;
  --piece-black-fill: #362313;
  --piece-black-stroke: #0d0700;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #201810;
    --bg-elev: #2b2117;
    --ink: #f1e6d4;
    --ink-soft: #bba687;
    --line: #45361f;
    --accent: #d97a5c;
    --accent-ink: #241005;
    --accent-soft: #4a3320;
    --good: #7fbc81;
    --bad: #e08a7e;
    --chip: #3a2c18;
    --shadow: 0 2px 12px rgba(0, 0, 0, 0.45);

    --sq-light: #cdb37f;
    --sq-dark: #7a4f24;
    --sq-light-select: #e4d876;
    --sq-dark-select: #b39c3f;
    --sq-move-dot: rgba(255, 245, 220, 0.4);
    --sq-last: rgba(217, 122, 92, 0.4);
    --sq-check: rgba(230, 60, 45, 0.6);
    --piece-white-fill: #f4ecd8;
    --piece-white-stroke: #2a1e10;
    --piece-black-fill: #1a1006;
    --piece-black-stroke: #000000;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3 {
  font-family: "Cinzel", "Georgia", serif;
  line-height: 1.25;
  margin: 0 0 0.4em;
}

button { font: inherit; }

/* ---------- Header / Footer ---------- */

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-elev);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { display: flex; align-items: center; gap: 8px; text-decoration: none; color: var(--ink); }
.brand-name { font-family: "Cinzel", serif; font-weight: 700; font-size: 1.2rem; letter-spacing: 0.01em; }
.header-actions { display: flex; gap: 6px; align-items: center; }

.app-footer {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  align-items: center;
  justify-content: space-between;
  padding: 14px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.85rem;
}
.link-button { background: none; border: none; padding: 0; color: var(--ink-soft); text-decoration: underline; cursor: pointer; }
.link-button:hover { color: var(--ink); }
.app-footer nav { display: flex; gap: 14px; }

/* ---------- Buttons ---------- */

.btn {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--bg-elev);
  color: var(--ink);
  border-radius: 10px;
  padding: 9px 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, transform 0.06s;
}
.btn:hover { background: var(--chip); }
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: var(--accent); filter: brightness(1.1); }
.btn-ghost { background: transparent; }
.btn-small { padding: 6px 12px; font-size: 0.9rem; border-radius: 9px; }
.btn-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }

/* ---------- Layout ---------- */

main { width: 100%; max-width: 1040px; margin: 0 auto; padding: 16px 14px 24px; }
.view-head { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.view-head h2 { margin: 0; font-size: 1.35rem; }
.view-intro { color: var(--ink-soft); margin-top: 0; max-width: 62ch; }

/* ---------- Menü ---------- */

.hero { text-align: center; margin: 18px 0 22px; }
.hero h1 { font-size: clamp(1.8rem, 6vw, 2.6rem); }
.hero-sub { color: var(--ink-soft); max-width: 48ch; margin: 0 auto; }

.menu-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 12px; }
.menu-card {
  text-align: left; display: flex; flex-direction: column; gap: 2px;
  padding: 16px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--bg-elev); box-shadow: var(--shadow); cursor: pointer;
  transition: transform 0.12s, box-shadow 0.12s;
}
.menu-card:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(70, 45, 10, 0.16); }
.menu-card-primary { border-color: var(--accent); }
.menu-card-icon { font-size: 1.6rem; }
.menu-card-title { font-family: "Cinzel", serif; font-weight: 700; font-size: 1.1rem; }
.menu-card-sub { color: var(--ink-soft); font-size: 0.88rem; }
.menu-card-progress {
  align-self: flex-start; margin-top: 8px; background: var(--accent-soft); color: var(--accent);
  font-weight: 700; font-size: 0.8rem; border-radius: 999px; padding: 2px 10px;
}

/* ---------- Lektionen / Aufgaben Listen ---------- */

.lesson-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.lesson-item {
  width: 100%; display: flex; align-items: center; gap: 12px; text-align: left;
  padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--bg-elev); cursor: pointer;
}
.lesson-item:hover { background: var(--chip); }
.lesson-num {
  flex: 0 0 auto; width: 32px; height: 32px; display: grid; place-items: center;
  border-radius: 50%; background: var(--chip); font-weight: 700; font-size: 0.9rem;
}
.lesson-item.done .lesson-num { background: var(--good); color: #fff; }
.lesson-item-title { font-weight: 600; }
.lesson-item-sub { display: block; color: var(--ink-soft); font-size: 0.85rem; font-weight: 400; }
.lesson-check { margin-left: auto; color: var(--good); font-weight: 700; }

.tactics-tabs { display: flex; gap: 6px; margin: 10px 0; }
.tab-btn {
  border: 1px solid var(--line); background: var(--bg-elev); color: var(--ink);
  border-radius: 9px; padding: 7px 14px; font-weight: 600; cursor: pointer;
}
.tab-btn[aria-selected="true"] { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }

.problem-tier { margin-top: 14px; }
.problem-tier h3 { font-size: 1.05rem; margin-bottom: 8px; }
.problem-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 10px; }
.problem-card {
  text-align: left; padding: 12px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--bg-elev); cursor: pointer; display: flex; flex-direction: column; gap: 4px;
}
.problem-card:hover { background: var(--chip); }
.problem-card .p-id { font-size: 0.75rem; color: var(--ink-soft); font-weight: 700; letter-spacing: 0.06em; }
.problem-card .p-title { font-weight: 600; font-size: 0.93rem; }
.problem-card.done { border-color: var(--good); }
.problem-card .p-star { color: var(--accent); font-size: 0.9rem; }

/* ---------- Brett-Layout ---------- */

.board-layout { display: grid; gap: 14px; align-items: start; }
@media (min-width: 760px) {
  .board-layout { grid-template-columns: minmax(0, 1.3fr) minmax(260px, 1fr); }
}

.board-wrap { position: relative; width: 100%; max-width: 560px; margin: 0 auto; }

.board {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  grid-template-rows: repeat(8, 1fr);
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(50, 30, 5, 0.35);
  border: 6px solid #6b4423;
  touch-action: manipulation;
  user-select: none;
}
@media (prefers-color-scheme: dark) { .board { border-color: #3a2712; } }

.sq {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.sq.light { background: var(--sq-light); }
.sq.dark { background: var(--sq-dark); }
.sq.selected.light { background: var(--sq-light-select); }
.sq.selected.dark { background: var(--sq-dark-select); }
.sq.last-from::before, .sq.last-to::before {
  content: ""; position: absolute; inset: 0; background: var(--sq-last);
}
.sq.in-check::after {
  content: ""; position: absolute; inset: 8%; border-radius: 50%;
  background: radial-gradient(circle, var(--sq-check) 0%, transparent 72%);
}
.sq.move-target::before {
  content: ""; position: absolute; width: 30%; height: 30%; border-radius: 50%;
  background: var(--sq-move-dot);
}
.sq.move-capture::before {
  content: ""; position: absolute; inset: 6%; border-radius: 50%;
  background: transparent; border: 4px solid var(--sq-move-dot); width: auto; height: auto;
}
.sq .coord-file, .sq .coord-rank {
  position: absolute; font-size: 0.6rem; font-weight: 700; opacity: 0.55; pointer-events: none;
}
.sq .coord-file { bottom: 2px; right: 3px; }
.sq .coord-rank { top: 2px; left: 3px; }
.sq.light .coord-file, .sq.light .coord-rank { color: var(--sq-dark); }
.sq.dark .coord-file, .sq.dark .coord-rank { color: var(--sq-light); }

.piece { width: 84%; height: 84%; pointer-events: none; filter: drop-shadow(0 1px 1px rgba(0,0,0,0.35)); }
.sq[draggable="true"] { cursor: grab; }
.sq.dragging { opacity: 0.4; }

@media (prefers-reduced-motion: no-preference) {
  .piece { transition: transform 0.1s ease; }
  .sq.selected .piece { transform: scale(1.06); }
}

.side-panel { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; }
.lesson-intro { margin-top: 0; color: var(--ink-soft); font-size: 0.93rem; }
.lesson-task { font-weight: 600; }
.choice-list { display: grid; gap: 8px; margin: 10px 0; }
.choice-btn {
  text-align: left; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px;
  background: var(--bg); color: var(--ink); cursor: pointer; font-weight: 600;
}
.choice-btn:hover { background: var(--chip); }
.choice-btn.correct { border-color: var(--good); background: var(--accent-soft); }
.choice-btn.wrong { border-color: var(--bad); }
.choice-btn:disabled { cursor: default; }

.feedback { min-height: 1.4em; margin: 8px 0 0; font-size: 0.95rem; }
.feedback.good { color: var(--good); font-weight: 600; }
.feedback.bad { color: var(--bad); font-weight: 600; }

/* ---------- Info-Bar (Partie) ---------- */

.info-bar {
  display: flex; flex-wrap: wrap; gap: 6px 14px; align-items: center;
  padding: 8px 12px; margin-bottom: 10px; background: var(--bg-elev);
  border: 1px solid var(--line); border-radius: 10px; font-size: 0.92rem;
}
.info-item { color: var(--ink-soft); font-weight: 600; }
.turn-item { display: inline-flex; align-items: center; gap: 7px; color: var(--ink); }
.turn-dot { width: 14px; height: 14px; border-radius: 50%; background: radial-gradient(circle at 35% 30%, #fff, #cfcabe); border: 1px solid rgba(0,0,0,0.4); }
.turn-dot.black { background: radial-gradient(circle at 35% 30%, #555, #000); }
.check-warning { color: var(--bad); font-weight: 700; }

.movelist-heading { font-size: 0.95rem; margin: 14px 0 6px; }
.move-list {
  list-style: none; margin: 0; padding: 0; max-height: 220px; overflow-y: auto;
  display: grid; grid-template-columns: 2.2em 1fr 1fr; gap: 2px 8px; font-size: 0.92rem;
}
.move-list .mv-num { color: var(--ink-soft); }
.move-list .mv-san { cursor: default; }
.move-list .mv-san.current { font-weight: 700; color: var(--accent); }

/* ---------- Dialoge ---------- */

.modal {
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-elev);
  color: var(--ink); padding: 20px; max-width: min(480px, 92vw); width: 100%;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}
.modal::backdrop { background: rgba(20, 12, 4, 0.5); }
.modal h3 { font-size: 1.3rem; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 18px; flex-wrap: wrap; }

.settings-group { border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; margin: 0 0 12px; }
.settings-group legend { font-weight: 700; font-size: 0.9rem; padding: 0 6px; }
.honest-note { font-weight: 400; color: var(--ink-soft); }
.radio-row { display: flex; align-items: flex-start; gap: 8px; padding: 4px 0; cursor: pointer; }

.seg-row { display: flex; gap: 6px; flex-wrap: wrap; }
.seg {
  border: 1px solid var(--line); background: var(--bg); color: var(--ink);
  border-radius: 9px; padding: 7px 14px; font-weight: 600; cursor: pointer;
}
.seg[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.hint-note { font-size: 0.82rem; color: var(--ink-soft); margin: 6px 0 0; }

.promo-row { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; margin-top: 10px; }
.promo-btn {
  display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 10px 14px;
  border: 1px solid var(--line); border-radius: 10px; background: var(--bg); color: var(--ink);
  font-weight: 600; cursor: pointer;
}
.promo-btn:hover { background: var(--chip); }

.premium-list { padding-left: 20px; }
.premium-list li { margin: 4px 0; }
.premium-price { font-size: 1.05rem; }
.todo-note { font-size: 0.82rem; color: var(--ink-soft); border-left: 3px solid var(--accent); padding-left: 10px; }
.result-headline { font-size: 1.2rem; font-weight: 700; }

/* ---------- Werbe-Slot ---------- */

.ad-slot {
  max-width: 1040px; width: calc(100% - 28px); margin: 0 auto 12px; min-height: 64px;
  border: 1px dashed var(--line); border-radius: 10px; display: grid; place-items: center;
  color: var(--ink-soft); font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase;
}

/* ---------- Sonstiges ---------- */

.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}