:root {
  --bg: #f2f2f7;
  --card: #ffffff;
  --text: #1c1c1e;
  --muted: #6b6b73;
  --line: #e3e3e8;
  --accent: #0f766e;
  --accent-soft: #ccfbf1;
  --good: #16a34a;
  --good-soft: #dcfce7;
  --bad: #dc2626;
  --bad-soft: #fee2e2;
  --warn: #d97706;
  --warn-soft: #fef3c7;
  --muscle: #b8383b;
  --bone: #c9b48a;
  --joint: #3b82f6;
  --shadow: 0 1px 2px rgba(0, 0, 0, .05), 0 4px 16px rgba(0, 0, 0, .05);
  --tabbar-h: 56px;
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-t: env(safe-area-inset-top, 0px);
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --card: #1c1c1e;
    --text: #f2f2f7;
    --muted: #98989f;
    --line: #2c2c2e;
    --accent: #2dd4bf;
    --accent-soft: #134e4a;
    --good: #4ade80;
    --good-soft: #14532d;
    --bad: #f87171;
    --bad-soft: #450a0a;
    --warn: #fbbf24;
    --warn-soft: #451a03;
    --shadow: none;
  }
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
[hidden] { display: none !important; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--text); }
body {
  font: 16px/1.45 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
}
button { font: inherit; color: inherit; }
#app { height: 100%; display: flex; flex-direction: column; }

/* ───── Kopfzeile ───── */
.topbar {
  display: flex; align-items: center; gap: 8px;
  padding: calc(var(--safe-t) + 8px) 16px 8px;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  position: sticky; top: 0; z-index: 20;
}
.topbar h1 { flex: 1; margin: 0; font-size: 28px; font-weight: 800; letter-spacing: -.02em; }
.icon-btn { border: 0; background: none; padding: 6px; border-radius: 10px; display: grid; place-items: center; cursor: pointer; }
.icon-btn svg, .tabbar svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.icon-btn { color: var(--accent); }

main#view {
  flex: 1; overflow-y: auto; -webkit-overflow-scrolling: touch;
  padding: 4px 16px calc(var(--tabbar-h) + var(--safe-b) + 24px);
}

/* ───── Tabbar ───── */
.tabbar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 30;
  display: flex; justify-content: space-around;
  height: calc(var(--tabbar-h) + var(--safe-b)); padding-bottom: var(--safe-b);
  background: color-mix(in srgb, var(--card) 88%, transparent);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-top: 0.5px solid var(--line);
}
.tabbar a {
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px;
  color: var(--muted); text-decoration: none; font-size: 10.5px; font-weight: 600;
}
.tabbar a.active { color: var(--accent); }

/* ───── Karten & Elemente ───── */
.card { background: var(--card); border-radius: 16px; padding: 16px; margin: 12px 0; box-shadow: var(--shadow); }
.card h2 { margin: 0 0 4px; font-size: 19px; letter-spacing: -.01em; }
.card h3 { margin: 14px 0 4px; font-size: 13px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
.card p { margin: 6px 0; }
.eyebrow { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--accent); }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.la { font-style: italic; color: var(--muted); }
.row { display: flex; gap: 8px; align-items: center; }
.row.wrap { flex-wrap: wrap; }
.spacer, .row .grow { flex: 1; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: 0; border-radius: 12px; padding: 12px 16px; font-weight: 650; cursor: pointer;
  background: var(--accent); color: #fff; text-decoration: none; min-height: 44px;
}
@media (prefers-color-scheme: dark) { .btn { color: #042f2e; } }
.btn.block { width: 100%; }
.btn.ghost { background: var(--accent-soft); color: var(--accent); }
.btn.plain { background: var(--bg); color: var(--text); }
.btn.danger { background: var(--bad-soft); color: var(--bad); }
.btn:disabled { opacity: .45; }
.btn:active { transform: scale(.98); }

.chip, .mini {
  border: 1px solid var(--line); background: var(--card); color: var(--text);
  border-radius: 999px; padding: 6px 12px; font-size: 14px; font-weight: 600; cursor: pointer;
}
.chip.on { background: var(--accent); border-color: var(--accent); color: #fff; }
@media (prefers-color-scheme: dark) { .chip.on { color: #042f2e; } }
.chips { display: flex; gap: 6px; flex-wrap: wrap; }

.list { background: var(--card); border-radius: 14px; overflow: hidden; margin: 12px 0; box-shadow: var(--shadow); }
.list > * { display: flex; align-items: center; gap: 12px; padding: 13px 16px; border-bottom: 0.5px solid var(--line); text-decoration: none; color: inherit; background: none; border-left: 0; border-right: 0; border-top: 0; width: 100%; text-align: left; cursor: pointer; }
.list > *:last-child { border-bottom: 0; }
.list .grow { flex: 1; min-width: 0; }
.list .chev { color: var(--muted); }
.section-title { margin: 22px 4px 6px; font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }

.badge { font-size: 12px; font-weight: 700; padding: 2px 8px; border-radius: 999px; background: var(--bg); color: var(--muted); white-space: nowrap; }
.badge.good { background: var(--good-soft); color: var(--good); }
.badge.bad { background: var(--bad-soft); color: var(--bad); }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
.badge.muscle { background: color-mix(in srgb, var(--muscle) 18%, transparent); color: var(--muscle); }
.badge.bone { background: color-mix(in srgb, var(--bone) 30%, transparent); color: color-mix(in srgb, var(--bone) 60%, var(--text)); }
.badge.joint { background: color-mix(in srgb, var(--joint) 18%, transparent); color: var(--joint); }

/* ───── Heute ───── */
.hero { display: flex; align-items: center; gap: 14px; }
.ring { width: 64px; height: 64px; flex: none; }
.ring circle { fill: none; stroke-width: 7; }
.ring .bg { stroke: var(--line); }
.ring .fg { stroke: var(--accent); stroke-linecap: round; transition: stroke-dashoffset .6s; transform: rotate(-90deg); transform-origin: 50% 50%; }
.streak { font-size: 14px; font-weight: 700; color: var(--warn); }
.task { display: flex; align-items: center; gap: 12px; }
.check { width: 24px; height: 24px; border-radius: 50%; border: 2px solid var(--line); flex: none; display: grid; place-items: center; font-size: 14px; color: #fff; }
.check.done { background: var(--good); border-color: var(--good); }

.install { background: var(--warn-soft); color: var(--text); }

/* ───── Quiz ───── */
.progress { height: 6px; background: var(--line); border-radius: 3px; overflow: hidden; margin: 6px 0 14px; }
.progress > div { height: 100%; background: var(--accent); transition: width .3s; }
.question { font-size: 19px; font-weight: 700; line-height: 1.35; margin: 4px 0 14px; }
.opt {
  display: block; width: 100%; text-align: left; padding: 14px 16px; margin: 8px 0;
  border-radius: 14px; border: 1.5px solid var(--line); background: var(--card); cursor: pointer; font-size: 15.5px; line-height: 1.35;
}
.opt.correct { border-color: var(--good); background: var(--good-soft); }
.opt.wrong { border-color: var(--bad); background: var(--bad-soft); }
.opt:disabled { cursor: default; color: var(--text); opacity: 1; }
.explain { border-left: 3px solid var(--accent); padding: 8px 12px; background: var(--accent-soft); border-radius: 0 10px 10px 0; margin: 12px 0; font-size: 15px; }
.score { font-size: 48px; font-weight: 800; text-align: center; margin: 8px 0; }

/* ───── Offene Fragen ───── */
textarea {
  width: 100%; min-height: 160px; border-radius: 14px; border: 1.5px solid var(--line); background: var(--card);
  color: var(--text); font: inherit; padding: 12px; resize: vertical;
}
input[type=text], input[type=search], input[type=number], input[type=password] {
  width: 100%; border-radius: 12px; border: 1.5px solid var(--line); background: var(--card); color: var(--text);
  font: inherit; font-size: 16px; padding: 10px 12px;
}
.kw { display: inline-block; margin: 3px 4px 3px 0; padding: 3px 9px; border-radius: 999px; font-size: 13px; font-weight: 650; }
.kw.hit { background: var(--good-soft); color: var(--good); }
.kw.miss { background: var(--bad-soft); color: var(--bad); }

/* ───── Karteikarten ───── */
.flash {
  perspective: 1200px; height: 300px; margin: 14px 0; cursor: pointer;
}
.flash-inner { position: relative; width: 100%; height: 100%; transition: transform .45s; transform-style: preserve-3d; }
.flash.flipped .flash-inner { transform: rotateY(180deg); }
.face {
  position: absolute; inset: 0; backface-visibility: hidden; -webkit-backface-visibility: hidden;
  background: var(--card); border-radius: 20px; box-shadow: var(--shadow); padding: 22px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; overflow-y: auto;
}
.face.back { transform: rotateY(180deg); }
.face .big { font-size: 26px; font-weight: 800; letter-spacing: -.01em; }
.face .sub { color: var(--muted); margin-top: 8px; font-size: 15px; }
.face .tag { position: absolute; top: 14px; left: 16px; }
.face .detail { text-align: left; font-size: 13.5px; width: 100%; }
.rate { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.rate button { border: 0; border-radius: 12px; padding: 10px 4px; font-weight: 700; font-size: 14px; cursor: pointer; }
.rate small { display: block; font-weight: 500; font-size: 11px; opacity: .75; }
.r0 { background: var(--bad-soft); color: var(--bad); }
.r1 { background: var(--warn-soft); color: var(--warn); }
.r2 { background: var(--good-soft); color: var(--good); }
.r3 { background: var(--accent-soft); color: var(--accent); }

/* ───── Lektion ───── */
.facts dt { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); margin-top: 12px; }
.facts dd { margin: 2px 0 0; }
.tr-box { background: var(--accent-soft); border-radius: 12px; padding: 10px 12px; margin-top: 12px; }
.klinik { background: var(--warn-soft); border-radius: 12px; padding: 10px 12px; margin-top: 12px; }

/* ───── 3D ───── */
#view3d { position: fixed; inset: 0; bottom: calc(var(--tabbar-h) + var(--safe-b)); top: calc(var(--safe-t) + 56px); z-index: 10;
  background: radial-gradient(ellipse at 50% 35%, color-mix(in srgb, var(--card) 100%, transparent), var(--bg) 75%); }
#canvas3d { position: absolute; inset: 0; touch-action: none; }
#canvas3d canvas { display: block; }
.hud-top { position: absolute; top: 4px; left: 12px; right: 12px; display: flex; flex-direction: column; gap: 8px; pointer-events: none; }
.hud-top > * { pointer-events: auto; }
.search-wrap { position: relative; }
.search-results { position: absolute; top: 46px; left: 0; right: 0; max-height: 45vh; overflow-y: auto; z-index: 5; margin: 0; }
.slider { font-size: 12px; font-weight: 600; color: var(--muted); display: flex; align-items: center; gap: 8px; align-self: flex-start;
  background: color-mix(in srgb, var(--card) 85%, transparent); padding: 4px 10px; border-radius: 999px; }
.slider input { width: 110px; accent-color: var(--accent); }
.hud-side { position: absolute; right: 12px; top: 150px; display: flex; flex-direction: column; gap: 6px; }
.mini { padding: 6px 10px; font-size: 13px; background: color-mix(in srgb, var(--card) 88%, transparent); }
.hint3d { position: absolute; bottom: 10px; left: 0; right: 0; text-align: center; font-size: 12px; color: var(--muted); pointer-events: none; padding: 0 16px; }
.sheet {
  position: absolute; left: 8px; right: 8px; bottom: 8px; max-height: 52%; overflow-y: auto; z-index: 6;
  background: var(--card); border-radius: 18px; padding: 14px 16px; box-shadow: 0 8px 30px rgba(0, 0, 0, .25);
}
.sheet .close { position: absolute; top: 8px; right: 10px; border: 0; background: var(--bg); border-radius: 50%; width: 30px; height: 30px; cursor: pointer; }
.sheet.collapsed .more { display: none; }

.empty { text-align: center; color: var(--muted); padding: 40px 0; }
.toast { position: fixed; left: 50%; bottom: calc(var(--tabbar-h) + var(--safe-b) + 16px); transform: translateX(-50%);
  background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 999px; font-weight: 600; font-size: 14px; z-index: 50; }

/* ───── 3D: Schichten, Fokusmodus, Beschriftungen ───── */
.depth-chips { align-items: center; }
.depth-label { font-size: 12px; font-weight: 700; color: var(--muted); margin-right: 2px; }
.focus-exit { display: none; align-self: flex-start; }
body.focus3d .focus-exit { display: inline-block; }
body.focus3d .hud-top .chips, body.focus3d .hud-top .slider, body.focus3d .search-wrap { display: none; }
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 6px; vertical-align: -1px; }
.part-chip.on { background: var(--card); color: var(--text); border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent) inset; }
.labels3d { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.lbl3d { position: absolute; left: 0; top: 0; white-space: nowrap; font-size: 11px; font-weight: 700; padding: 2px 7px; border-radius: 999px;
  background: rgba(0, 0, 0, .65); color: #fff; }
.lbl3d.lbl-o { background: #16a34a; }
.lbl3d.lbl-i { background: #2563eb; }
.lbl3d.lbl-part { background: rgba(255, 255, 255, .85); color: #111; }
.lbl3d.lbl-active { outline: 2px solid var(--accent); }

/* ───── Günün kelimeleri ───── */
.big-word { font-size: 26px; font-weight: 800; letter-spacing: -.01em; line-height: 1.3; }

/* ───── Dönüş yolu: Lesemodus ───── */
.read-card { font-size: 18px; line-height: 1.5; }
.read-card .muted { font-size: 15px; margin-top: 6px; }

/* Lücke im Lückentext: nicht umbrechen, unterstrichenes Kästchen */
.gap { display: inline-block; min-width: 3.4em; height: 1.05em; vertical-align: -0.15em; border-bottom: 2.5px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, transparent); border-radius: 4px 4px 0 0; white-space: nowrap; }

/* ───── Knochenpunkte, Achsen, Schritt-für-Schritt-Ansicht ───── */
.lbl3d.lbl-lm { background: #9333ea; }
.lbl3d.lbl-via { background: #d97706; }
.lbl3d.lbl-axis { color: #fff; }
.badge.landmark { background: color-mix(in srgb, #9333ea 18%, transparent); color: #9333ea; }
.stepper { display: flex; align-items: center; gap: 8px; margin: -2px 30px 8px 0; }
.stepper .count { flex: 1; text-align: center; font-weight: 700; font-size: 13px; }
.stepper .chip:disabled { opacity: .35; }
.legend { display: grid; gap: 6px; margin-top: 10px; }
.legend button { display: flex; align-items: center; gap: 4px; text-align: left; background: none; border: 0; padding: 4px 0; color: var(--text); font: inherit; font-size: 14px; }
.sheet.pq-end { max-height: 72%; }
.pq-fb { margin-top: 8px; padding: 8px 10px; border-radius: 12px; font-size: 14px; }
.pq-fb.ok { background: var(--good-soft); color: var(--good); }
.pq-fb.bad { background: var(--bad-soft); color: var(--bad); }
.pq-fb.ok .muted { color: inherit; opacity: .8; }
.lm-list { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
/* ───── Sınav geri sayımı + Deneme sınavı ───── */
.exam-card.soon { border: 2px solid var(--warn); }
.exam-card h2 { margin: 2px 0; }
.list > button { font: inherit; color: var(--text); }
.mock-head { position: sticky; top: 0; z-index: 2; background: var(--bg); padding: 4px 0; }
.mock-timer { font-weight: 800; font-variant-numeric: tabular-nums; font-size: 17px; }
.mock-timer.low { color: var(--bad); }
.mock-nav { display: grid; grid-template-columns: repeat(9, 1fr); gap: 5px; margin-top: 6px; }
.mock-nav button { aspect-ratio: 1; min-width: 0; border-radius: 9px; border: 1.5px solid var(--line); background: var(--card); color: var(--text); font: inherit; font-size: 13px; font-weight: 700; padding: 0; cursor: pointer; }
.mock-nav button.open { border-style: dashed; }
.mock-nav button.done { background: var(--accent-soft); border-color: var(--accent); }
.mock-nav button.on { outline: 2.5px solid var(--accent); outline-offset: 1px; }
.opt.picked { border-color: var(--accent); background: var(--accent-soft); color: var(--text); }
.mock-topic { margin: 8px 0; }
.mock-topic .progress { margin: 4px 0 0; }

/* Sözlü sınav + 🔊 Aussprache */
.say-btn { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; min-width: 32px; padding: 0; margin-left: 4px;
  border: 0; border-radius: 999px; background: var(--accent-soft); font-size: 15px; line-height: 1; vertical-align: middle; cursor: pointer; }
.say-btn.off { opacity: .4; }
.face .say-btn { margin: 10px auto 0; }
.examiner { background: var(--card); border-radius: 16px; padding: 14px; margin: 10px 0; border-left: 4px solid var(--accent); }
.examiner-who { font-weight: 750; font-size: 14px; color: var(--muted); }
.examiner-q { font-size: 18px; font-weight: 650; margin-top: 6px; line-height: 1.4; }
.kw.half { background: var(--warn-soft); color: var(--warn); }
.btn.rec { background: var(--bad-soft); color: var(--bad); animation: recPulse 1.2s ease-in-out infinite; }
@keyframes recPulse { 50% { opacity: .65; } }

/* ───── Vaka çalışması (Befund-Trainer) ───── */
.case-steps { display: flex; gap: 4px; margin: 4px 0 2px; }
.case-steps span { flex: 1; min-width: 0; text-align: center; font-size: 11px; font-weight: 700; padding: 5px 2px; border-radius: 8px;
  background: var(--card); color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.case-steps span.done { background: var(--accent-soft); color: var(--accent); }
.case-steps span.on { background: var(--accent); color: #fff; }
.case-text { line-height: 1.5; }
.card details, details.card { cursor: default; }
details.card > summary { cursor: pointer; list-style-position: inside; }
details.card[open] > summary { margin-bottom: 6px; }
.finding ul { margin: 8px 0 4px; padding-left: 20px; }
.finding li { margin: 3px 0; }
.case-ta { min-height: 84px; margin-top: 6px; font-size: 16px; }
.case-mine { margin: 8px 0 0; padding: 8px 10px; border-radius: 10px; background: var(--bg); white-space: pre-wrap; }

/* Landmark-Quiz: Ansicht-Knöpfe verdecken sonst Punkte am Rand */
body.pq3d .hud-side { display: none; }
/* Mindestgröße für Fingerziele (≈ 40 px) */
.say-btn { min-width: 40px; min-height: 40px; }
.close { min-width: 40px; min-height: 40px; }
details > summary { min-height: 40px; display: flex; align-items: center; }
.say-btn { width: 40px; height: 40px; flex-shrink: 0; }