/* Schweizerdeutsch-Lerner – eigenes Design
   Palette: Schweizer Rot #d52b1e + Weiss + Bergblau */

:root {
  --red: #d52b1e;
  --red-dark: #b02016;
  --red-soft: #fde7e5;
  --blue: #2b6ca3;
  --blue-light: #4a90c2;
  --blue-soft: #e7f0f8;
  --mountain: #6b8ea3;

  --bg: #f4f7fa;
  --bg-grad-1: #eef4f9;
  --bg-grad-2: #fbecea;
  --surface: #ffffff;
  --surface-2: #f7fafc;
  --border: #dde6ee;
  --text: #1c2733;
  --text-soft: #5a6b7a;
  --text-faint: #8595a3;
  --shadow: 0 4px 16px rgba(28, 50, 70, 0.08);
  --shadow-lg: 0 12px 32px rgba(28, 50, 70, 0.16);
  --radius: 16px;
  --radius-sm: 10px;
  --focus: 0 0 0 3px rgba(43, 108, 163, 0.45);
}

[data-theme="dark"] {
  --red: #ef5347;
  --red-dark: #c8362b;
  --red-soft: #3a1c1a;
  --blue: #6db0e0;
  --blue-light: #8cc4ee;
  --blue-soft: #16293a;
  --mountain: #7fa3bb;

  --bg: #0e1620;
  --bg-grad-1: #101c28;
  --bg-grad-2: #1c1614;
  --surface: #18222e;
  --surface-2: #1f2c39;
  --border: #2b3a49;
  --text: #e8eef4;
  --text-soft: #a9bac9;
  --text-faint: #74879a;
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 14px 34px rgba(0, 0, 0, 0.55);
  --focus: 0 0 0 3px rgba(109, 176, 224, 0.5);
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1100px 480px at 100% -8%, var(--bg-grad-2), transparent 60%),
    radial-gradient(900px 460px at -6% 6%, var(--bg-grad-1), transparent 55%),
    var(--bg);
  min-height: 100vh;
  min-height: 100dvh;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--red);
  color: #fff;
  padding: 10px 14px;
  border-radius: 0 0 8px 0;
  z-index: 200;
}
.skip-link:focus { left: 0; }

button { font-family: inherit; cursor: pointer; }
:focus-visible { outline: none; box-shadow: var(--focus); border-radius: 8px; }

.hidden { display: none !important; }

/* Header */
.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.header-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 12px 16px 8px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand { display: flex; align-items: center; gap: 10px; min-width: 0; flex: 1; }
.brand-mark {
  flex: 0 0 auto;
  display: inline-flex;
  filter: drop-shadow(0 2px 4px rgba(213, 43, 30, 0.3));
}
.brand-text { min-width: 0; }
.brand-text h1 {
  margin: 0;
  font-size: clamp(1.05rem, 4.5vw, 1.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.tagline {
  margin: 0;
  font-size: 0.78rem;
  color: var(--text-soft);
  font-weight: 600;
}
.header-actions { display: flex; gap: 6px; flex: 0 0 auto; }
.icon-btn {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background .15s, transform .1s;
}
.icon-btn:hover { background: var(--blue-soft); }
.icon-btn:active { transform: scale(0.94); }
.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: inline; }

/* Tabs */
.tabbar {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  gap: 4px;
  padding: 0 12px 10px;
}
.tab {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text-soft);
  font-weight: 700;
  font-size: 0.92rem;
  padding: 10px 6px;
  border-radius: 12px;
  border-bottom: 3px solid transparent;
  transition: color .15s, background .15s, border-color .15s;
}
.tab:hover { background: var(--surface-2); }
.tab.active {
  color: var(--red);
  background: var(--red-soft);
  border-bottom-color: var(--red);
}

/* Main */
.app-main {
  max-width: 760px;
  margin: 0 auto;
  padding: 16px;
}
.view { animation: fade .2s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

/* Toolbar */
.toolbar { display: flex; flex-direction: column; gap: 12px; margin-bottom: 12px; }
.search {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 0 12px;
  box-shadow: var(--shadow);
  color: var(--text-faint);
}
.search:focus-within { box-shadow: var(--focus), var(--shadow); }
.search input {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 1rem;
  padding: 13px 0;
  outline: none;
  min-width: 0;
}
.search input::placeholder { color: var(--text-faint); }
.clear-btn {
  border: none;
  background: var(--surface-2);
  color: var(--text-soft);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  font-size: 1.2rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-soft);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 7px 14px;
  border-radius: 999px;
  transition: all .15s;
  white-space: nowrap;
}
.chip:hover { border-color: var(--blue); color: var(--blue); }
.chip.active {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}
.chip .chip-count { opacity: .7; font-weight: 700; margin-left: 4px; }

.result-count {
  margin: 4px 2px 10px;
  font-size: 0.85rem;
  color: var(--text-faint);
  font-weight: 600;
}

/* Phrase list */
.phrase-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.phrase-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--red);
  border-radius: var(--radius);
  padding: 14px 14px 12px;
  box-shadow: var(--shadow);
  display: flex;
  gap: 12px;
  align-items: flex-start;
  transition: transform .12s, box-shadow .15s;
}
.phrase-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.phrase-main { flex: 1; min-width: 0; cursor: pointer; }
.phrase-de {
  margin: 0 0 4px;
  font-weight: 700;
  font-size: 1.02rem;
  overflow-wrap: anywhere;
}
.phrase-ch {
  margin: 0 0 4px;
  color: var(--red);
  font-weight: 700;
  font-size: 1.05rem;
  overflow-wrap: anywhere;
}
.phrase-pron {
  margin: 0;
  font-size: 0.82rem;
  color: var(--text-faint);
  font-style: italic;
  overflow-wrap: anywhere;
}
.phrase-tag {
  display: inline-block;
  margin-top: 8px;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--blue);
  background: var(--blue-soft);
  padding: 3px 9px;
  border-radius: 999px;
}
.phrase-side { display: flex; flex-direction: column; gap: 6px; flex: 0 0 auto; }
.mini-btn {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-soft);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all .15s;
}
.mini-btn:hover { background: var(--blue-soft); color: var(--blue); }
.mini-btn.fav-on { color: var(--red); background: var(--red-soft); border-color: var(--red); }
.mini-btn.fav-on:hover { color: var(--red-dark); }

/* Empty states */
.empty {
  text-align: center;
  padding: 40px 16px;
  color: var(--text-soft);
}
.empty p { margin: 0 0 14px; }

/* Buttons */
.btn-primary {
  border: none;
  background: var(--red);
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 12px 18px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background .15s, transform .1s;
  box-shadow: 0 4px 12px rgba(213, 43, 30, 0.28);
}
.btn-primary:hover { background: var(--red-dark); }
.btn-primary:active { transform: scale(0.97); }
.btn-ghost {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 11px 16px;
  border-radius: 12px;
  transition: all .15s;
}
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); }
.btn-ghost.active { background: var(--red-soft); border-color: var(--red); color: var(--red); }
.btn-nav {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 11px 14px;
  border-radius: 12px;
  transition: all .15s;
}
.btn-nav:hover { border-color: var(--blue); color: var(--blue); }
.btn-nav:disabled { opacity: .4; cursor: not-allowed; }

/* Karteikarten */
.cards-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.card-cat { display: flex; flex-direction: column; gap: 4px; flex: 1; min-width: 160px; }
.card-cat span { font-size: 0.78rem; font-weight: 700; color: var(--text-soft); }
.card-cat select {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-weight: 600;
}
.card-progress {
  font-weight: 800;
  color: var(--blue);
  background: var(--blue-soft);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.9rem;
}

.card-stage { perspective: 1200px; margin-bottom: 16px; }
.flashcard {
  position: relative;
  width: 100%;
  min-height: 280px;
  transform-style: preserve-3d;
  transition: transform .5s;
  cursor: pointer;
}
.flashcard.flipped { transform: rotateY(180deg); }
.card-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  box-shadow: var(--shadow-lg);
}
.card-front {
  background: linear-gradient(150deg, var(--surface), var(--blue-soft));
  border: 1px solid var(--border);
}
.card-back {
  background: linear-gradient(150deg, var(--red-soft), var(--surface));
  border: 1px solid var(--red);
  transform: rotateY(180deg);
}
.card-label {
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 10px;
}
.card-de {
  margin: 0;
  font-size: clamp(1.3rem, 6vw, 1.8rem);
  font-weight: 800;
  overflow-wrap: anywhere;
}
.card-ch {
  margin: 0 0 8px;
  font-size: clamp(1.4rem, 6.5vw, 1.9rem);
  font-weight: 800;
  color: var(--red);
  overflow-wrap: anywhere;
}
.card-cat-tag {
  margin-top: 14px;
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--blue);
  background: var(--blue-soft);
  padding: 4px 12px;
  border-radius: 999px;
}
.card-hint {
  margin-top: 18px;
  font-size: 0.8rem;
  color: var(--text-faint);
  font-weight: 600;
}
.card-pron {
  margin: 0 0 10px;
  font-style: italic;
  color: var(--text-soft);
  font-size: 0.92rem;
  overflow-wrap: anywhere;
}
.card-example {
  margin: 0 0 16px;
  font-size: 0.88rem;
  color: var(--text-soft);
  overflow-wrap: anywhere;
}
.speak-btn {
  border: 1px solid var(--red);
  background: var(--surface);
  color: var(--red);
  font-weight: 700;
  font-size: 0.88rem;
  padding: 9px 16px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  transition: all .15s;
}
.speak-btn:hover { background: var(--red); color: #fff; }

.card-controls {
  display: flex;
  gap: 10px;
  align-items: stretch;
  margin-bottom: 10px;
}
.card-controls .btn-primary { flex: 1.4; }
.card-controls .btn-nav { flex: 1; }
.card-controls.secondary { justify-content: center; }
.card-controls.secondary .btn-ghost { flex: 1; }

/* Footer */
.app-footer {
  max-width: 760px;
  margin: 0 auto;
  padding: 18px 16px 28px;
  text-align: center;
}
.app-footer p {
  margin: 0;
  font-size: 0.78rem;
  color: var(--text-faint);
}

/* Toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: calc(24px + env(safe-area-inset-bottom));
  transform: translate(-50%, 20px);
  background: var(--text);
  color: var(--surface);
  padding: 12px 20px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s, transform .25s;
  z-index: 150;
  max-width: calc(100vw - 32px);
  text-align: center;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(12, 20, 30, 0.55);
  backdrop-filter: blur(3px);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 120;
  padding: 16px;
  animation: fade .18s ease;
}
.modal {
  position: relative;
  background: var(--surface);
  border-radius: 20px 20px 16px 16px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 480px;
  padding: 22px;
  animation: slideUp .25s ease;
  max-height: 88vh;
  overflow-y: auto;
}
@keyframes slideUp { from { transform: translateY(40px); opacity: .6; } to { transform: none; opacity: 1; } }
@media (min-width: 540px) {
  .modal-overlay { align-items: center; }
}
.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-soft);
  font-size: 1.5rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.modal-cat {
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--blue);
  background: var(--blue-soft);
  padding: 4px 11px;
  border-radius: 999px;
}
.modal-de {
  margin: 12px 0 16px;
  font-size: 1.4rem;
  font-weight: 800;
  overflow-wrap: anywhere;
  padding-right: 30px;
}
.modal-row { margin-bottom: 14px; }
.modal-key {
  display: block;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 3px;
}
.modal-ch {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--red);
  overflow-wrap: anywhere;
}
.modal-pron { margin: 0; font-style: italic; color: var(--text-soft); overflow-wrap: anywhere; }
.modal-example { margin: 0; color: var(--text); overflow-wrap: anywhere; }
.modal-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.modal-actions .btn-primary { flex: 1; min-width: 180px; }
.modal-actions .btn-ghost { flex: 0 0 auto; }

@media (max-width: 420px) {
  .header-inner { padding: 10px 12px 6px; }
  .app-main { padding: 12px; }
  .card-controls { flex-wrap: wrap; }
  .card-controls .btn-primary { flex: 1 1 100%; order: -1; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .flashcard { transition: none; }
}