/* ============================================================
   Vokabeltrainer – Styles (hell/dunkel)
   ============================================================ */
:root {
  color-scheme: light;
  --bg: #f4f3ef;
  --surface: #fcfcfb;
  --surface-2: #efeee9;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #898781;
  --line: #e1e0d9;
  --axis: #c3c2b7;
  --ring: rgba(11,11,11,.10);
  --accent: #2a78d6;
  --accent-ink: #ffffff;
  --accent-soft: #cde2fb;
  --good: #0ca30c;
  --good-ink: #006300;
  --good-soft: #dff3df;
  --bad: #d03b3b;
  --bad-soft: #fbe3e3;
  --warn: #fab219;
  --u1: #2a78d6; --u2: #eb6834; --u3: #1baf7a;
  --seq-1: #86b6ef; --seq-2: #3987e5; --seq-3: #1c5cab; --seq-4: #0d366b;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(0,0,0,.05), 0 6px 20px rgba(0,0,0,.05);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0d0d0d; --surface: #1a1a19; --surface-2: #242422;
    --ink: #f0efec; --ink-2: #c3c2b7; --muted: #898781;
    --line: #2c2c2a; --axis: #383835; --ring: rgba(255,255,255,.10);
    --accent: #3987e5; --accent-soft: #1c3557;
    --good-ink: #0ca30c; --good-soft: #15301a; --bad-soft: #3a1c1c;
    --u1: #3987e5; --u2: #d95926; --u3: #199e70;
    --seq-1: #184f95; --seq-2: #256abf; --seq-3: #5598e7; --seq-4: #9ec5f4;
    --shadow: none;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0d0d0d; --surface: #1a1a19; --surface-2: #242422;
  --ink: #f0efec; --ink-2: #c3c2b7; --muted: #898781;
  --line: #2c2c2a; --axis: #383835; --ring: rgba(255,255,255,.10);
  --accent: #3987e5; --accent-soft: #1c3557;
  --good-ink: #0ca30c; --good-soft: #15301a; --bad-soft: #3a1c1c;
  --u1: #3987e5; --u2: #d95926; --u3: #199e70;
  --seq-1: #184f95; --seq-2: #256abf; --seq-3: #5598e7; --seq-4: #9ec5f4;
  --shadow: none;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--ink); font: 16px/1.5 var(--font); -webkit-font-smoothing: antialiased; }
button, input, select { font: inherit; color: inherit; }
a { color: var(--accent); }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.num { font-variant-numeric: tabular-nums; }

/* ---------- Kopfzeile ---------- */
.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  padding: 10px 20px; background: var(--surface); border-bottom: 1px solid var(--line);
}
.brand { font-weight: 700; font-size: 1.1rem; letter-spacing: -.01em; display: flex; align-items: center; gap: 8px; }
.brand .logo { width: 28px; height: 28px; border-radius: 8px; background: var(--accent); color: #fff; display: grid; place-items: center; font-size: .85rem; }
.nav { display: flex; gap: 4px; }
.nav a { text-decoration: none; color: var(--ink-2); padding: 6px 12px; border-radius: 999px; font-weight: 500; }
.nav a.active { background: var(--accent-soft); color: var(--ink); }
.topbar .spacer { flex: 1; }
.learner { display: flex; align-items: center; gap: 6px; }
select, input[type=text], input[type=search] {
  background: var(--surface); border: 1px solid var(--axis); border-radius: 10px; padding: 7px 10px; min-height: 38px;
}
input:focus-visible, select:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

main { max-width: 1080px; margin: 0 auto; padding: 24px 16px 64px; }
h1 { font-size: 1.6rem; margin: 0 0 4px; letter-spacing: -.02em; }
h2 { font-size: 1.1rem; margin: 0 0 12px; }
h3 { font-size: .95rem; margin: 0 0 8px; color: var(--ink-2); font-weight: 600; }
.lead { color: var(--ink-2); margin: 0 0 20px; }

.card { background: var(--surface); border: 1px solid var(--ring); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; }
.grid { display: grid; gap: 16px; }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 820px) { .g3, .g4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } .g2 { grid-template-columns: 1fr; } }
@media (max-width: 480px) { .g3 { grid-template-columns: 1fr; } }

/* ---------- Buttons ---------- */
.btn { border: 1px solid var(--axis); background: var(--surface); border-radius: 10px; padding: 9px 16px; cursor: pointer; font-weight: 600; min-height: 42px; }
.btn:hover { background: var(--surface-2); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.07); }
.btn.big { padding: 13px 26px; font-size: 1.05rem; }
.btn.ghost { border-color: transparent; background: transparent; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.icon-btn { border: 1px solid var(--line); background: var(--surface); border-radius: 999px; width: 40px; height: 40px; cursor: pointer; display: inline-grid; place-items: center; }
.icon-btn:hover { background: var(--surface-2); }

/* ---------- Kennzahlen ---------- */
.stat { padding: 16px 18px; }
.stat .label { color: var(--ink-2); font-size: .85rem; }
.stat .value { font-size: 1.9rem; font-weight: 700; letter-spacing: -.02em; line-height: 1.2; }
.stat .sub { color: var(--muted); font-size: .8rem; }
.goal-bar { height: 8px; border-radius: 999px; background: var(--surface-2); overflow: hidden; margin-top: 8px; }
.goal-bar > span { display: block; height: 100%; background: var(--good); border-radius: 999px; transition: width .4s; }

/* ---------- Auswahl (Chips & Optionskarten) ---------- */
.setup-section { margin-top: 22px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { border: 1px solid var(--axis); background: var(--surface); border-radius: 999px; padding: 7px 14px; cursor: pointer; display: inline-flex; align-items: center; gap: 8px; font-weight: 500; }
.chip .dot { width: 10px; height: 10px; border-radius: 50%; }
.chip[aria-pressed="true"] { background: var(--accent-soft); border-color: var(--accent); }
.chip .cnt { color: var(--muted); font-size: .8rem; }
.modes { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
@media (max-width: 720px) { .modes { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.mode { text-align: left; border: 1px solid var(--axis); background: var(--surface); border-radius: 12px; padding: 14px; cursor: pointer; }
.mode .t { font-weight: 700; display: flex; gap: 8px; align-items: center; }
.mode .d { color: var(--ink-2); font-size: .85rem; margin-top: 2px; }
.mode[aria-pressed="true"] { border-color: var(--accent); background: var(--accent-soft); box-shadow: inset 0 0 0 1px var(--accent); }
.seg { display: inline-flex; border: 1px solid var(--axis); border-radius: 10px; overflow: hidden; flex-wrap: wrap; }
.seg button { border: 0; background: var(--surface); padding: 8px 14px; cursor: pointer; border-right: 1px solid var(--line); }
.seg button:last-child { border-right: 0; }
.seg button[aria-pressed="true"] { background: var(--accent); color: #fff; }
.row { display: flex; gap: 24px; flex-wrap: wrap; align-items: flex-start; }
.start-row { margin-top: 26px; display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }

/* ---------- Lernkarte ---------- */
.session-head { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.progress { flex: 1; height: 10px; background: var(--surface-2); border-radius: 999px; overflow: hidden; }
.progress > span { display: block; height: 100%; background: var(--accent); transition: width .3s; }
.session-count { font-variant-numeric: tabular-nums; color: var(--ink-2); font-size: .9rem; min-width: 60px; text-align: right; }

.stage { max-width: 680px; margin: 0 auto; }
.qcard { background: var(--surface); border: 1px solid var(--ring); border-radius: 20px; box-shadow: var(--shadow); padding: 44px 28px 28px; text-align: center; min-height: 260px; display: flex; flex-direction: column; justify-content: center; gap: 14px; position: relative; }
.qcard .tag { position: absolute; top: 14px; left: 16px; font-size: .75rem; color: var(--muted); display: flex; gap: 6px; align-items: center; }
.qcard .tag .dot { width: 8px; height: 8px; border-radius: 50%; }
.qcard .speak { position: absolute; top: 10px; right: 12px; }
.prompt { font-size: 2rem; font-weight: 700; letter-spacing: -.02em; line-height: 1.25; overflow-wrap: anywhere; }
.prompt.smaller { font-size: 1.35rem; font-weight: 600; }
.hint-line { color: var(--ink-2); }
.example { color: var(--ink-2); font-style: italic; }
.answer-reveal { border-top: 1px dashed var(--axis); padding-top: 14px; }
.answer-reveal .a { font-size: 1.5rem; font-weight: 700; color: var(--accent); }
.gap { display: inline-block; min-width: 90px; border-bottom: 2px solid var(--accent); margin: 0 4px; }

.answer-input { width: 100%; font-size: 1.3rem; padding: 12px 14px; border-radius: 12px; border: 2px solid var(--axis); background: var(--surface); text-align: center; }
.answer-input.ok { border-color: var(--good); background: var(--good-soft); }
.answer-input.err { border-color: var(--bad); background: var(--bad-soft); }

.actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 18px; }
.rate { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; margin-top: 18px; }
.rate button { border: 1px solid var(--axis); border-radius: 12px; padding: 10px 6px; background: var(--surface); cursor: pointer; font-weight: 600; }
.rate button small { display: block; font-weight: 400; color: var(--muted); font-size: .75rem; }
.rate button.again { border-color: var(--bad); }
.rate button.easy { border-color: var(--good); }
.rate button:hover { background: var(--surface-2); }

.options { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 18px; }
@media (max-width: 520px) { .options { grid-template-columns: 1fr; } }
.opt { border: 1px solid var(--axis); background: var(--surface); border-radius: 12px; padding: 14px; cursor: pointer; text-align: left; display: flex; gap: 10px; align-items: center; font-weight: 500; min-height: 56px; }
.opt kbd { font: 600 .75rem var(--font); border: 1px solid var(--axis); border-radius: 6px; padding: 1px 6px; color: var(--muted); }
.opt:hover { background: var(--surface-2); }
.opt.ok { border-color: var(--good); background: var(--good-soft); }
.opt.err { border-color: var(--bad); background: var(--bad-soft); }
.opt:disabled { cursor: default; }

.feedback { margin-top: 16px; border-radius: 12px; padding: 12px 16px; text-align: left; display: flex; gap: 10px; align-items: flex-start; }
.feedback.ok { background: var(--good-soft); }
.feedback.err { background: var(--bad-soft); }
.feedback.near { background: #fff4d6; }
:root[data-theme="dark"] .feedback.near { background: #3a3014; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .feedback.near { background: #3a3014; } }
.feedback .ic { font-weight: 800; }
.feedback b { font-weight: 700; }

.match { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 8px; }
.match .col { display: flex; flex-direction: column; gap: 8px; }
.tile { border: 1px solid var(--axis); background: var(--surface); border-radius: 12px; padding: 12px; cursor: pointer; min-height: 52px; font-weight: 500; transition: opacity .25s; }
.tile.sel { border-color: var(--accent); background: var(--accent-soft); box-shadow: inset 0 0 0 1px var(--accent); }
.tile.done { opacity: .3; cursor: default; border-color: var(--good); }
.tile.err { border-color: var(--bad); background: var(--bad-soft); }

.kbd-hint { text-align: center; color: var(--muted); font-size: .8rem; margin-top: 14px; }
.kbd-hint kbd { font: 600 .75rem var(--font); border: 1px solid var(--axis); border-radius: 5px; padding: 0 5px; }

/* ---------- Zusammenfassung ---------- */
.summary-hero { text-align: center; padding: 28px; }
.summary-hero .big { font-size: 3rem; font-weight: 800; letter-spacing: -.03em; }
.wordlist { list-style: none; padding: 0; margin: 0; }
.wordlist li { display: flex; justify-content: space-between; gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--line); }
.wordlist li:last-child { border-bottom: 0; }

/* ---------- Bericht ---------- */
.filters { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 18px; }
.chart { width: 100%; position: relative; }
.chart svg { display: block; max-width: 100%; overflow: visible; }
.chart text { fill: var(--muted); font: 11px var(--font); }
.chart .grid-line { stroke: var(--line); stroke-width: 1; }
.chart .base-line { stroke: var(--axis); stroke-width: 1; }
.legend { display: flex; gap: 14px; flex-wrap: wrap; font-size: .82rem; color: var(--ink-2); margin-bottom: 8px; }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend i { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }
.tooltip { position: fixed; pointer-events: none; z-index: 50; background: var(--surface); color: var(--ink); border: 1px solid var(--ring); box-shadow: 0 4px 16px rgba(0,0,0,.15); border-radius: 10px; padding: 8px 10px; font-size: .82rem; line-height: 1.4; max-width: 240px; }
.tooltip b { font-weight: 700; }

.heat { display: grid; grid-template-columns: 28px repeat(24, minmax(0, 1fr)); gap: 2px; font-size: .7rem; color: var(--muted); }
.heat .c { aspect-ratio: 1; border-radius: 3px; background: var(--surface-2); }
.heat .h { text-align: center; }

.stackbar { display: flex; height: 26px; border-radius: 8px; overflow: hidden; gap: 2px; }
.stackbar > div { min-width: 2px; }

.unitrow { display: grid; grid-template-columns: 190px 1fr 60px; gap: 12px; align-items: center; padding: 8px 0; border-bottom: 1px solid var(--line); }
.unitrow:last-child { border-bottom: 0; }
.track { height: 12px; background: var(--surface-2); border-radius: 999px; overflow: hidden; display: flex; gap: 2px; }
.track > span { height: 100%; }
@media (max-width: 560px) { .unitrow { grid-template-columns: 1fr; gap: 4px; } }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; }
td.wrap { white-space: normal; min-width: 140px; }
th { color: var(--ink-2); font-weight: 600; font-size: .8rem; cursor: pointer; user-select: none; position: sticky; top: 0; background: var(--surface); }
th.sorted::after { content: " ▾"; }
th.sorted.asc::after { content: " ▴"; }
td.n, th.n { text-align: right; font-variant-numeric: tabular-nums; }
.pill { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: .75rem; font-weight: 600; border: 1px solid var(--axis); color: var(--ink-2); }
.pill.lv-neu { color: var(--muted); }
.pill.lv-lernen { border-color: var(--seq-1); }
.pill.lv-wiederholen { border-color: var(--seq-2); }
.pill.lv-gefestigt { border-color: var(--seq-3); background: var(--accent-soft); color: var(--ink); }
.hist { display: inline-flex; gap: 2px; }
.hist i { width: 8px; height: 14px; border-radius: 2px; display: inline-block; }
.hist i.o { background: var(--good); }
.hist i.x { background: var(--bad); }
.empty { text-align: center; padding: 30px; color: var(--muted); }
.error-box { background: var(--bad-soft); border: 1px solid var(--bad); border-radius: 12px; padding: 14px 16px; margin-bottom: 16px; }
.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--ink); color: var(--bg); padding: 10px 18px; border-radius: 999px; font-size: .9rem; z-index: 60; }

/* ============================================================
   Handy & Touch
   ============================================================ */
html { -webkit-text-size-adjust: 100%; }
button, a, .tile, .opt, .chip, .mode { touch-action: manipulation; -webkit-tap-highlight-color: transparent; }
.answer-input, input, select { font-size: max(16px, 1em); } /* verhindert Auto-Zoom auf iPhone */
.topbar { padding-top: max(10px, env(safe-area-inset-top)); padding-left: max(16px, env(safe-area-inset-left)); padding-right: max(16px, env(safe-area-inset-right)); }
main { padding-bottom: max(64px, env(safe-area-inset-bottom)); }

/* Tastatur-Hinweise nur bei echter Tastatur zeigen */
@media (hover: none), (pointer: coarse) {
  .kbd-hint, .opt kbd, .kn { display: none; }
  .btn:hover, .opt:hover, .rate button:hover, .icon-btn:hover { background: var(--surface); }
}

@media (max-width: 600px) {
  body { font-size: 15px; }
  .topbar { gap: 10px; flex-wrap: nowrap; }
  .brand { font-size: 1rem; }
  .brand .logo { width: 26px; height: 26px; }
  .nav { margin-left: auto; }
  .nav a { padding: 8px 12px; }
  main { padding: 16px 12px 48px; }
  h1 { font-size: 1.35rem; }
  .lead { font-size: .9rem; margin-bottom: 14px; }
  .card { padding: 14px; border-radius: 12px; }
  .grid { gap: 10px; }
  .stat { padding: 12px 14px; }
  .stat .value { font-size: 1.5rem; }
  .setup-section { margin-top: 18px; }
  .row { gap: 18px; display: block; }
  .row > div + div { margin-top: 18px; }

  /* Segment-Schalter füllen die Breite */
  .seg { display: flex; width: 100%; }
  .seg button { flex: 1 1 0; padding: 10px 4px; min-height: 44px; font-size: .9rem; }
  #selSeg { flex-wrap: wrap; }
  #selSeg button { flex: 1 1 30%; border-bottom: 1px solid var(--line); }

  .modes { gap: 8px; }
  .mode { padding: 12px; }
  .mode .d { font-size: .78rem; line-height: 1.35; }
  .chip { padding: 8px 12px; font-size: .9rem; }

  .start-row { position: sticky; bottom: 0; margin: 20px -12px 0; padding: 12px 12px max(12px, env(safe-area-inset-bottom));
               background: linear-gradient(to top, var(--bg) 70%, transparent); }
  .start-row .btn { width: 100%; }

  /* Lernrunde */
  .session-head { gap: 8px; margin-bottom: 12px; }
  #quitBtn { padding: 8px 6px; min-height: 40px; }
  .qcard { padding: 40px 16px 20px; min-height: 0; border-radius: 16px; gap: 10px; }
  .prompt { font-size: clamp(1.4rem, 7vw, 1.9rem); }
  .prompt.smaller { font-size: 1.15rem; }
  .answer-input { font-size: 1.15rem; padding: 12px; }
  .actions { margin-top: 14px; }
  .actions .btn { flex: 1 1 0; min-height: 48px; }
  .rate { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .rate button { min-height: 56px; }
  .options { grid-template-columns: 1fr; gap: 8px; margin-top: 14px; }
  .opt { min-height: 52px; padding: 12px 14px; }
  .match { gap: 8px; }
  .tile { padding: 10px 8px; min-height: 56px; font-size: .9rem; overflow-wrap: anywhere; }
  .feedback { padding: 10px 12px; font-size: .92rem; }

  .summary-hero { padding: 20px 14px; }
  .summary-hero .big { font-size: 2.4rem; }
  .actions .btn.big { padding: 12px 14px; font-size: 1rem; }

  /* Bericht */
  .filters { gap: 8px; }
  .filters > * { flex: 1 1 100%; }
  .filters .spacer, .filters > span[style] { display: none; }
  .filters input[type=search], .filters select { width: 100%; min-width: 0 !important; }
  .heat { grid-template-columns: 22px repeat(24, minmax(0, 1fr)); gap: 1px; font-size: .62rem; }
  .heat .c { border-radius: 2px; }
  .unitrow { grid-template-columns: 1fr 52px; }
  .unitrow .track { grid-column: 1 / -1; grid-row: 2; }
  th, td { padding: 7px 8px; }
  table { font-size: .84rem; }
}
@media (max-width: 600px) {
  /* weniger wichtige Spalten am Handy ausblenden */
  #vocabTable th:nth-child(3), #vocabTable td:nth-child(3),
  #vocabTable th:nth-child(8), #vocabTable td:nth-child(8),
  #sessTable th:nth-child(4), #sessTable td:nth-child(4),
  #sessTable th:nth-child(5), #sessTable td:nth-child(5),
  #hardTable th:nth-child(5), #hardTable td:nth-child(5) { display: none; }
  td.wrap { min-width: 110px; }
}
@media (max-width: 600px) {
  .summary-actions { flex-direction: column; }
  .summary-actions .btn { width: 100%; text-align: center; }
  #sessTable th:nth-child(3), #sessTable td:nth-child(3) { display: none; }
}
a.btn { color: var(--ink); display: inline-flex; align-items: center; justify-content: center; }