/* mit Karte, bitte - design system.
   Concept: a card table. Deep felt-green background, cream playing cards, gold foil
   accents. Each tier gets its own color identity; each pronoun gets a consistent
   accent color everywhere it appears (memory aid). */

:root {
  --felt-900: #0a2827;
  --felt-800: #0f3d3e;
  --felt-700: #144d4b;
  --felt-600: #1b615d;
  --cream: #fbf3e7;
  --cream-dim: #f0e4d0;
  --cream-line: #e3d3b8;
  --ink: #1c2b2a;
  --ink-soft: #4c6360;
  --gold: #e8b84b;
  --gold-bright: #f6cd6e;

  --tier1: #ff6b6b; /* A1 foundations */
  --tier2: #f2a93b; /* A2 past tenses */
  --tier3: #3dbfb8; /* B1 prefixes & reflexives */
  --tier4: #9b6bff; /* B1 advanced */

  --pron-ich: #ff6b6b;
  --pron-du: #3dbfb8;
  --pron-er: #f2c14e;
  --pron-wir: #6c8eff;
  --pron-ihr: #c77dff;
  --pron-sie: #5fd98a;

  --type-weak: #3dbfb8;
  --type-strong: #ff6b6b;
  --type-mixed: #f2c14e;
  --type-modal: #6c8eff;
  --type-irregular: #c77dff;

  --correct: #48d17a;
  --incorrect: #ff5c5c;

  --font-display: 'Baloo 2', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'IBM Plex Mono', monospace;

  --header-h: 60px;
  --nav-h: 64px;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-card: 0 6px 20px rgba(10, 40, 39, 0.35);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--felt-900);
  background-image:
    radial-gradient(circle at 20% 10%, rgba(255,255,255,0.04), transparent 40%),
    radial-gradient(circle at 80% 90%, rgba(255,255,255,0.03), transparent 40%);
  color: var(--cream);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
h1, h2, h3, h4 { font-family: var(--font-display); margin: 0; }
p { margin: 0 0 0.75em; line-height: 1.55; }
button, input, select, textarea { font-family: inherit; color: inherit; }
button { cursor: pointer; }
a { color: var(--gold-bright); }
:focus-visible { outline: 3px solid var(--gold-bright); outline-offset: 2px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ---------------------------------------------------------------- shell */
.app-shell { min-height: 100vh; display: flex; flex-direction: column; }

.app-header {
  position: fixed; top: 0; left: 0; right: 0; height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 0 14px; background: var(--felt-900);
  border-bottom: 1px solid rgba(232, 184, 75, 0.25); z-index: 100;
}
.wordmark {
  display: flex; align-items: center; gap: 8px; background: none; border: none;
  font-family: var(--font-display); font-size: 19px; font-weight: 700; color: var(--cream);
  padding: 6px; border-radius: var(--radius-sm); flex-shrink: 0; white-space: nowrap;
}
.wordmark:hover { background: rgba(255,255,255,0.06); }
.wordmark .bump { font-size: 23px; color: var(--gold-bright); display: inline-block; transform: translateY(-1px); }
.wordmark .card-glyph {
  width: 20px; height: 14px; border-radius: 3px; background: var(--gold);
  position: relative; flex-shrink: 0;
}
.wordmark .card-glyph::after {
  content: ''; position: absolute; top: 5px; left: 3px; right: 3px; height: 2px; background: var(--felt-900);
}
.breadcrumb {
  flex: 1 1 auto; min-width: 0; text-align: center;
  font-family: var(--font-mono); font-size: 12px; color: var(--cream-dim);
  letter-spacing: 0.04em; text-transform: uppercase; white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis;
}
.profile-pill {
  display: flex; align-items: center; gap: 7px; background: rgba(255,255,255,0.08);
  border: 1px solid rgba(232,184,75,0.3); border-radius: 999px; padding: 6px 12px;
  font-size: 13px; font-weight: 600; color: var(--cream); flex-shrink: 0;
}
.profile-pill:hover { background: rgba(255,255,255,0.14); }
.profile-avatar {
  width: 20px; height: 20px; border-radius: 50%; background: var(--gold);
  color: var(--felt-900); display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 800; font-family: var(--font-display);
}

.view {
  flex: 1;
  padding: calc(var(--header-h) + 16px) 16px 24px;
  max-width: 880px; width: 100%; margin: 0 auto;
}

/* Normal document flow, NOT fixed — this is a real end-of-page footer, part of the
   shell (a sibling of #view, so route changes never wipe it), reached by scrolling
   past a view's content like any ordinary website footer. Its own bottom padding
   clears the fixed bottom-nav (+ the safe-area home-indicator strip) so the last
   line is never hidden behind the nav, whether the page is long or short. */
.app-footer {
  background: var(--felt-800); border-top: 1px solid rgba(232, 184, 75, 0.15);
  padding-bottom: calc(var(--nav-h) + env(safe-area-inset-bottom, 0px) + 18px);
}
.footer-inner { max-width: 880px; margin: 0 auto; padding: 28px 16px 0; }
.footer-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 22px;
  padding-bottom: 20px; border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-heading {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--cream-dim); margin: 0 0 10px;
}
.footer-col { display: flex; flex-direction: column; gap: 7px; font-size: 13px; }
.footer-col a { color: var(--cream); text-decoration: none; }
.footer-col a:hover, .footer-col a:focus-visible { color: var(--gold-bright); text-decoration: underline; }
.footer-about { color: var(--cream-dim); font-size: 12.5px; line-height: 1.5; margin: 0 0 8px; }
.footer-bottombar {
  display: flex; align-items: center; justify-content: center; flex-wrap: wrap;
  gap: 4px 14px; padding: 14px 0 0; font-size: 11px; color: var(--ink-soft);
}
.footer-bottombar a { color: var(--cream-dim); text-decoration: none; }
.footer-bottombar a:hover, .footer-bottombar a:focus-visible { color: var(--gold-bright); text-decoration: underline; }
.footer-bottombar .coffee-link { color: var(--gold); font-weight: 600; }
.footer-bottombar .coffee-link:hover, .footer-bottombar .coffee-link:focus-visible { color: var(--gold-bright); }

.bottom-nav {
  position: fixed; bottom: 0; left: 0; right: 0; height: var(--nav-h);
  padding-bottom: env(safe-area-inset-bottom, 0px); box-sizing: content-box;
  display: flex; background: var(--felt-900);
  border-top: 1px solid rgba(232,184,75,0.25); z-index: 100;
}
.bottom-nav button {
  flex: 1; background: none; border: none; color: var(--cream-dim);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 3px; font-size: 11px; font-weight: 600;
}
.bottom-nav button.active { color: var(--gold-bright); }
.bottom-nav .icon { font-size: 19px; }

/* ---------------------------------------------------------------- buttons */
.btn {
  border: none; border-radius: var(--radius-sm); padding: 12px 18px; font-weight: 700;
  font-size: 14px; font-family: var(--font-body); background: rgba(255,255,255,0.1);
  color: var(--cream); border: 1px solid rgba(255,255,255,0.15);
}
.btn:hover { background: rgba(255,255,255,0.16); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
/* .btn defaults assume a dark page background. Any plain (non-primary) .btn placed
   inside a light .card needs inverted contrast, or it renders nearly invisible. */
.card .btn:not(.btn-primary) {
  background: rgba(10, 40, 39, 0.06); color: var(--ink); border: 1px solid var(--cream-line);
}
.card .btn:not(.btn-primary):hover { background: rgba(10, 40, 39, 0.12); }
.btn-primary { background: var(--gold); color: var(--felt-900); border: none; }
.btn-primary:hover { background: var(--gold-bright); }
.btn-block { width: 100%; }
.btn-lg { padding: 15px 22px; font-size: 16px; border-radius: var(--radius); }
.btn-ghost { background: none; border: 1px solid rgba(255,255,255,0.2); }
.btn-danger, .card .btn.btn-danger { background: var(--incorrect); color: #fff; border: none; }
.btn-danger:hover, .card .btn.btn-danger:hover { background: #ff7a7a; }
.card-danger { border: 1px solid rgba(255, 92, 92, 0.4); background: #fff5f5; }
.card-danger h3 { color: #a1341f; }

/* ---------------------------------------------------------------- cards */
.card {
  background: var(--cream); color: var(--ink); border-radius: var(--radius);
  box-shadow: var(--shadow-card); padding: 18px;
}
.card + .card { margin-top: 14px; }

.banner {
  background: rgba(232, 184, 75, 0.12); border: 1px solid rgba(232, 184, 75, 0.4);
  border-radius: var(--radius-sm); padding: 12px 14px; font-size: 13.5px; color: var(--cream);
}
.banner strong { color: var(--gold-bright); }

/* ---------------------------------------------------------------- pronoun & type chips */
.chip {
  display: inline-flex; align-items: center; gap: 5px; padding: 3px 10px;
  border-radius: 999px; font-size: 11.5px; font-weight: 700; font-family: var(--font-mono);
  color: var(--felt-900);
}
.chip-dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.pron-ich { background: color-mix(in srgb, var(--pron-ich) 25%, white); color: #7a1f1f; }
.pron-du { background: color-mix(in srgb, var(--pron-du) 25%, white); color: #0f5450; }
.pron-er { background: color-mix(in srgb, var(--pron-er) 30%, white); color: #6b4c05; }
.pron-wir { background: color-mix(in srgb, var(--pron-wir) 25%, white); color: #1f3499; }
.pron-ihr { background: color-mix(in srgb, var(--pron-ihr) 25%, white); color: #5a1f99; }
.pron-sie { background: color-mix(in srgb, var(--pron-sie) 25%, white); color: #196b3d; }

.type-weak { color: var(--type-weak); }
.type-strong { color: var(--type-strong); }
.type-mixed { color: var(--type-mixed); }
.type-modal { color: var(--type-modal); }
.type-irregular { color: var(--type-irregular); }

/* ---------------------------------------------------------------- conjugation tables */
.conj-table { width: 100%; border-collapse: collapse; font-family: var(--font-mono); margin: 14px 0; }
.conj-table th, .conj-table td { padding: 10px 12px; text-align: left; font-size: 14.5px; }
.conj-table tbody tr { border-bottom: 1px solid var(--cream-line); transition: background 0.15s; }
.conj-table tbody tr:last-child { border-bottom: none; }
.conj-table .pron-cell { font-weight: 700; width: 34%; }
.conj-table .form-cell { font-size: 16px; font-weight: 600; }
.conj-table .pron-cell.pron-ich { color: #a13636; }
.conj-table .pron-cell.pron-du { color: #157873; }
.conj-table .pron-cell.pron-er { color: #93690a; }
.conj-table .pron-cell.pron-wir { color: #3350c4; }
.conj-table .pron-cell.pron-ihr { color: #7b30c4; }
.conj-table .pron-cell.pron-sie { color: #22874c; }

/* fillable table-completion drill */
.conj-cell-input {
  width: 100%; border: 2px solid var(--cream-line); border-radius: 8px; padding: 8px 10px;
  font-family: var(--font-mono); font-size: 15px; background: white; color: var(--ink);
}
.conj-cell-input.filled { border-color: var(--type-weak); background: #eafbf9; }
.conj-cell-input.wrong { border-color: var(--incorrect); background: #ffecec; animation: shake 0.3s; }

/* ---------------------------------------------------------------- SRS flip card */
.flip-scene { perspective: 1200px; max-width: 420px; margin: 0 auto; }
.flip-card { position: relative; width: 100%; min-height: 220px; }
.flip-card-inner {
  position: relative; width: 100%; height: 100%; min-height: 220px;
  transition: transform 0.5s cubic-bezier(.4,.2,.2,1); transform-style: preserve-3d;
}
.flip-card.flipped .flip-card-inner { transform: rotateY(180deg); }
.flip-card-face {
  position: absolute; inset: 0; backface-visibility: hidden; border-radius: var(--radius);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 22px; text-align: center; box-shadow: var(--shadow-card);
}
.flip-card-front { background: var(--cream); color: var(--ink); }
.flip-card-back { background: var(--felt-700); color: var(--cream); transform: rotateY(180deg); border: 2px solid var(--gold); }

/* ---------------------------------------------------------------- progress ring */
.ring-wrap { position: relative; display: inline-flex; align-items: center; justify-content: center; }
.ring-wrap svg { transform: rotate(-90deg); }
.ring-track { fill: none; stroke: rgba(255,255,255,0.15); }
.ring-fill { fill: none; stroke: var(--gold-bright); stroke-linecap: round; transition: stroke-dashoffset 0.8s cubic-bezier(.3,.8,.3,1); }
.ring-label { position: absolute; font-family: var(--font-display); font-weight: 700; }

/* ---------------------------------------------------------------- course map */
.tier-section { margin-bottom: 30px; }
.tier-heading {
  display: flex; align-items: center; gap: 10px; margin-bottom: 12px; padding: 4px 0;
}
.tier-dot { width: 12px; height: 12px; border-radius: 50%; }
.tier-heading h2 { font-size: 15px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--cream-dim); }
.module-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
.module-node {
  background: var(--cream); border-radius: var(--radius); padding: 14px; text-align: left;
  border: 3px solid transparent; position: relative; min-height: 108px;
  display: flex; flex-direction: column; justify-content: space-between;
  box-shadow: var(--shadow-card);
}
.module-node .num { font-family: var(--font-mono); font-size: 11px; color: var(--ink-soft); font-weight: 700; }
.module-node .title { font-family: var(--font-display); font-size: 14.5px; color: var(--ink); font-weight: 700; margin-top: 2px; }
.module-node .status { font-size: 11px; margin-top: 8px; font-weight: 700; }
.module-node.mastered { border-color: var(--gold); }
.module-node.locked { opacity: 0.55; }
.module-node .mini-ring { position: absolute; top: 10px; right: 10px; }

/* ---------------------------------------------------------------- legend */
.legend-row { display: flex; flex-wrap: wrap; gap: 10px; margin: 10px 0; }

/* ---------------------------------------------------------------- feedback flashes */
.drill-box { background: var(--cream); color: var(--ink); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow-card); }
.drill-input {
  width: 100%; border: 2px solid var(--cream-line); border-radius: var(--radius-sm);
  padding: 12px 14px; font-size: 18px; font-family: var(--font-mono); background: white; color: var(--ink);
}
.drill-input.flash-correct { animation: flashGreen 0.6s; border-color: var(--correct); }
.drill-input.flash-incorrect { animation: flashRed 0.5s; border-color: var(--incorrect); }
@keyframes flashGreen { 0% { background: #d3f7df; } 100% { background: white; } }
@keyframes flashRed { 0%, 40% { background: #ffd7d7; } 100% { background: white; } }
@keyframes shake { 0%, 100% { transform: translateX(0); } 25% { transform: translateX(-4px); } 75% { transform: translateX(4px); } }

.mc-options { display: grid; gap: 10px; margin-top: 14px; }
.mc-option {
  text-align: left; padding: 13px 16px; border-radius: var(--radius-sm); border: 2px solid var(--cream-line);
  background: white; color: var(--ink); font-size: 15px; font-family: var(--font-mono); font-weight: 600;
}
.mc-option:hover { border-color: var(--gold); }
.mc-option.correct { background: #d3f7df; border-color: var(--correct); }
.mc-option.incorrect { background: #ffd7d7; border-color: var(--incorrect); }

.keyboard-helper { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.keyboard-helper button {
  background: var(--cream-dim); border: 1px solid var(--cream-line); border-radius: 8px;
  padding: 7px 13px; font-family: var(--font-mono); font-size: 15px; color: var(--ink); font-weight: 700;
}

/* ---------------------------------------------------------------- checkpoint / celebration */
.celebrate { text-align: center; padding: 30px 16px; }
.celebrate .big-emoji { font-size: 52px; display: block; margin-bottom: 10px; animation: pop 0.5s cubic-bezier(.3,1.6,.5,1); }
@keyframes pop { 0% { transform: scale(0.3); opacity: 0; } 70% { transform: scale(1.15); } 100% { transform: scale(1); opacity: 1; } }
.unlock-banner {
  background: linear-gradient(135deg, var(--gold), var(--gold-bright)); color: var(--felt-900);
  border-radius: var(--radius); padding: 14px 18px; font-weight: 800; text-align: center;
  animation: pop 0.5s cubic-bezier(.3,1.6,.5,1);
}

/* ---------------------------------------------------------------- heatmap */
.heatmap-grid { display: grid; grid-template-columns: repeat(auto-fill, 12px); gap: 3px; }
.heatmap-cell { width: 12px; height: 12px; border-radius: 3px; background: rgba(255,255,255,0.08); transition: background 0.4s, transform 0.3s; }
.heatmap-cell.active { background: var(--gold-bright); animation: pop 0.4s; }

/* ---------------------------------------------------------------- profile switcher */
.profile-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 14px; margin-top: 16px; }
.profile-card {
  background: var(--cream); color: var(--ink); border-radius: var(--radius); padding: 20px 14px;
  text-align: center; box-shadow: var(--shadow-card); border: 3px solid transparent;
}
.profile-card:hover { border-color: var(--gold); }
.profile-card .avatar-lg {
  width: 52px; height: 52px; border-radius: 50%; background: var(--felt-700); color: var(--cream);
  display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: 800;
  margin: 0 auto 10px; font-family: var(--font-display);
}
.profile-card .name { font-family: var(--font-display); font-weight: 700; font-size: 15px; }

/* ---------------------------------------------------------------- misc */
.status-msg { min-height: 18px; font-size: 12.5px; color: var(--gold-bright); }
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; }
.field { margin-bottom: 12px; }
.field label { display: block; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.05em; text-transform: uppercase; color: var(--cream-dim); margin-bottom: 5px; }
.field input, .field textarea { width: 100%; background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.2); border-radius: var(--radius-sm); padding: 10px 12px; font-size: 14px; color: var(--cream); }
.readout { font-size: 14px; color: var(--cream-dim); margin: 10px 0; }
.explain h3 { margin-top: 20px; margin-bottom: 8px; font-size: 17px; color: var(--ink); }
.explain p { color: var(--ink-soft); }
.explain .rule-box { background: var(--cream-dim); border-left: 4px solid var(--gold); border-radius: 8px; padding: 12px 14px; margin: 12px 0; color: var(--ink); }
.explain .example-line { font-family: var(--font-mono); background: white; border-radius: 8px; padding: 10px 12px; margin: 8px 0; display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.speaker-btn { background: none; border: none; font-size: 17px; color: inherit; opacity: 0.7; padding: 2px 6px; }
.speaker-btn:hover { opacity: 1; }

@media (min-width: 640px) {
  .profile-card .avatar-lg { width: 60px; height: 60px; }
}

@media (max-width: 640px) {
  .breadcrumb { display: none; }
  .wordmark { font-size: 16px; gap: 6px; }
  .wordmark .bump { font-size: 19px; }
  .profile-pill { padding: 7px; border-radius: 50%; }
  .profile-pill span:not(.profile-avatar) { display: none; }
  .view { padding-left: 12px; padding-right: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  .flip-card-inner, .ring-fill, .heatmap-cell, .big-emoji, .unlock-banner { transition: none !important; animation: none !important; }
}