/* ============================================================
   Parleo — Companion App  ·  Redesign on the Parleo CI
   ------------------------------------------------------------
   "Speak before you feel ready."
   Warm paper surfaces · Teal = the app action accent ·
   Terracotta = brand warmth (streaks, celebration, speaker B) ·
   Navy ink for text · Bricolage Grotesque + Hanken Grotesk ·
   Lucide line icons.
   Self-contained: tokens are inlined so this file can drop
   straight into the existing PWA repo. Values mirror the
   Parleo design-system tokens.
   ============================================================ */

:root {
  /* ---------- Terracotta — brand warmth ---------- */
  --terracotta-50:  #FBF0EC;
  --terracotta-100: #F6DFD6;
  --terracotta-200: #ECC1B0;
  --terracotta-400: #DC835F;
  --terracotta-500: #D66A4E;
  --terracotta-600: #BE543B;
  --terracotta-700: #9C4430;

  /* ---------- Paper — warm neutrals ---------- */
  --paper-0:   #FFFFFF;
  --paper-50:  #FBF9F6;
  --paper-100: #F8F5F2;
  --paper-200: #F2EDE8;
  --paper-300: #E5DDD5;
  --paper-400: #D6CABE;
  --paper-500: #B8A899;
  --paper-600: #8A7A6B;

  /* ---------- Ink — cool navy-charcoal ---------- */
  --ink-950: #11161F;
  --ink-900: #161C26;
  --ink-800: #1F2937;
  --ink-700: #313E4F;
  --ink-600: #51606F;
  --ink-500: #6B7888;
  --ink-400: #94A0AC;
  --ink-300: #C2CAD2;

  /* ---------- Teal — APP accent ---------- */
  --teal-50:  #E6FBFB;
  --teal-100: #C2F4F5;
  --teal-300: #5FE0E2;
  --teal-400: #00CED1;
  --teal-500: #0FB6B8;
  --teal-600: #0A9698;
  --teal-700: #0A7779;

  /* ---------- Semantic ---------- */
  --green-50:  #EDF6F1;
  --green-100: #DCEFE5;
  --green-500: #3D8B6B;
  --green-600: #2F7256;
  --amber-50:  #FBF3E2;
  --amber-100: #F7E9CC;
  --amber-500: #E0A03C;
  --amber-600: #C2841F;
  --red-50:    #FBEAE7;
  --red-100:   #F7DAD6;
  --red-500:   #C8362B;
  --red-600:   #A52A21;

  /* ---------- Type ---------- */
  --font-display: "Bricolage Grotesque", "Outfit", ui-sans-serif, system-ui, sans-serif;
  --font-body:    "Hanken Grotesk", "Inter", ui-sans-serif, system-ui, sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, monospace;

  /* ---------- Radii ---------- */
  --radius-sm:   8px;
  --radius-md:   10px;
  --radius-lg:   14px;
  --radius-xl:   20px;
  --radius-2xl:  28px;
  --radius-card: 16px;
  --radius-pill: 999px;

  /* ---------- Shadows (warm, ink-tinted) ---------- */
  --shadow-xs:  0 1px 2px rgba(31,41,55,0.06);
  --shadow-sm:  0 2px 6px rgba(31,41,55,0.07);
  --shadow-md:  0 6px 18px rgba(31,41,55,0.09);
  --shadow-lg:  0 16px 40px rgba(31,41,55,0.12);
  --shadow-xl:  0 28px 64px rgba(31,41,55,0.16);
  --shadow-brand: 0 14px 30px rgba(214,106,78,0.26);
  --shadow-app:   0 14px 30px rgba(15,182,184,0.28);
  --ring-app:    0 0 0 3px rgba(15,182,184,0.30);
  --ring-brand:  0 0 0 3px rgba(214,106,78,0.30);

  /* ---------- Motion ---------- */
  --dur-fast: 140ms;
  --dur-base: 220ms;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.4, 0.64, 1);
  --transition-speed: var(--dur-base);

  /* ============================================================
     LEGACY ALIASES — map the existing app variable names onto
     the Parleo palette so untouched markup just works.
     ============================================================ */
  --bg-color:         var(--paper-100);
  --surface-color:    var(--paper-0);
  --surface-2:        var(--paper-200);
  --text-primary:     var(--ink-900);
  --text-secondary:   var(--ink-500);
  --accent-primary:   var(--teal-500);   /* primary action */
  --accent-secondary: var(--teal-600);   /* app accent text */
  --danger-color:     var(--red-500);
  --success-color:    var(--green-500);
  --nav-bg:           var(--paper-0);
  --nav-active:       var(--teal-600);
  --nav-inactive:     var(--ink-400);
  --border-radius:    var(--radius-card);
  --border-subtle:    var(--paper-300);
  --border-strong:    var(--paper-400);
}

/* ============================================================
   BASE
   ============================================================ */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  -webkit-tap-highlight-color: transparent;
}

body {
  background:
    radial-gradient(120% 60% at 50% 0%, var(--paper-100) 0%, var(--paper-200) 60%);
  color: var(--text-primary);
  display: flex;
  justify-content: center;
  align-items: stretch;
  height: 100vh;
  overflow: hidden;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.12;
  color: var(--ink-900);
}

/* Lucide icons inherit text size & color */
[data-lucide],
svg.lucide {
  width: 1em;
  height: 1em;
  display: inline-block;
  vertical-align: -0.14em;
  stroke-width: 2;
  flex-shrink: 0;
}

/* ============================================================
   APP SHELL
   ============================================================ */
#app {
  width: 100%;
  max-width: 460px;
  height: 100%;
  display: flex;
  flex-direction: column;
  position: relative;
  background-color: var(--paper-100);
  overflow: hidden;
}

@media (min-width: 500px) {
  body { padding: 28px 0; }
  #app {
    height: 100%;
    max-height: 920px;
    border-radius: 34px;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--paper-300);
  }
}

/* ---------- Header ---------- */
header {
  padding: 16px 20px 14px;
  background: rgba(248,245,242,0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 10;
  display: flex;
  justify-content: center;
  align-items: center;
  border-bottom: 1px solid var(--paper-300);
  flex-shrink: 0;
}

#header-world-selector {
  background: var(--paper-0);
  border: 1px solid var(--paper-300);
  border-radius: var(--radius-pill);
  padding: 9px 16px;
  color: var(--ink-900);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  max-width: 80%;
  box-shadow: var(--shadow-xs);
  transition: box-shadow var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out);
}
#header-world-selector:hover {
  border-color: var(--terracotta-200);
  box-shadow: var(--shadow-sm);
}
#header-world-selector [data-lucide]:first-child,
#header-world-selector svg.lucide:first-child {
  color: var(--terracotta-500);
  width: 18px;
  height: 18px;
}

/* ---------- Main scroll ---------- */
main {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  padding-bottom: 92px;
}

.view { display: none; animation: fadeIn var(--dur-base) var(--ease-out); }
.view.active-view { display: block; }
.hidden { display: none !important; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   BOX LIST & WORD CARDS
   ============================================================ */
.box-list, .word-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.box-card {
  background: var(--paper-0);
  border-radius: var(--radius-card);
  padding: 18px 20px;
  cursor: pointer;
  border: 1px solid var(--paper-300);
  box-shadow: var(--shadow-sm);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: transform var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out);
}
.box-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--paper-400);
}
.box-card:active { transform: translateY(0); }
.box-info {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
  flex: 1;
}
.box-info h2 { font-size: 18px; line-height: 1.2; margin: 0; }
.box-info p  { font-size: 13px; color: var(--ink-500); font-weight: 500; margin: 0; }
.box-card .chevron, .box-card [data-lucide="chevron-right"], .box-card svg.lucide { color: var(--ink-400); }

.box-delete-btn {
  background: none;
  border: none;
  color: var(--red-500);
  opacity: 0.45;
  cursor: pointer;
  padding: 6px 8px;
  font-size: 15px;
  border-radius: var(--radius-sm);
  transition: opacity var(--dur-fast), background var(--dur-fast);
  flex-shrink: 0;
  line-height: 1;
  display: inline-flex;
}
.box-delete-btn:hover { opacity: 1; background: var(--red-50); }

.word-card {
  background: var(--paper-0);
  border-radius: var(--radius-card);
  padding: 15px 16px;
  border: 1px solid var(--paper-300);
  box-shadow: var(--shadow-xs);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.word-card-front { font-weight: 700; font-size: 16px; color: var(--ink-900); }
.word-card-back  { color: var(--ink-500); font-size: 13px; font-weight: 500; }
.word-card [data-lucide], .word-card svg.lucide { color: var(--red-500); }

/* ---------- Detail header ---------- */
.header-with-back {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  margin-bottom: 18px;
  gap: 14px;
}
.back-btn {
  background: var(--paper-0);
  border: 1px solid var(--paper-300);
  color: var(--ink-800);
  font-size: 18px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: var(--shadow-xs);
  transition: background var(--dur-fast);
}
.back-btn:hover { background: var(--paper-200); }
.header-with-back h2 { font-size: 22px; }
.detail-headings { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 3px; }
.detail-title-row { display: flex; align-items: center; gap: 2px; flex-wrap: wrap; }
.detail-title-row h2 { font-size: 21px; line-height: 1.15; }
.header-with-back [data-lucide]:not(.back-btn [data-lucide]) { color: var(--ink-400); }
.detail-subtitle {
  font-size: 12px;
  color: var(--teal-600);
  font-weight: 700;
  letter-spacing: 0.01em;
}
.detail-subtitle.muted { color: var(--ink-500); }

.box-actions { margin-bottom: 16px; }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn-primary {
  background: var(--teal-500);
  color: #fff;
  border: none;
  padding: 15px 28px;
  border-radius: var(--radius-lg);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: var(--shadow-sm);
  transition: background var(--dur-fast), transform var(--dur-fast), box-shadow var(--dur-fast);
}
.btn-primary:hover { background: var(--teal-600); }
.btn-primary:active { transform: translateY(1px); box-shadow: none; }

.btn-primary-small {
  background: var(--teal-500);
  color: #fff;
  border: none;
  padding: 11px 18px;
  border-radius: var(--radius-lg);
  font-weight: 700;
  cursor: pointer;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: background var(--dur-fast), transform var(--dur-fast);
}
.btn-primary-small:hover { background: var(--teal-600); }
.btn-primary-small:active { transform: translateY(1px); }

.full-width { width: 100%; }

.btn-success {
  background: var(--green-500);
  color: #fff;
  border: none;
  padding: 15px;
  border-radius: var(--radius-lg);
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background var(--dur-fast), transform var(--dur-fast);
}
.btn-success:hover { background: var(--green-600); }
.btn-success:active { transform: translateY(1px); }

.btn-danger {
  background: var(--red-500);
  color: #fff;
  border: none;
  padding: 15px;
  border-radius: var(--radius-lg);
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  flex: 1;
  transition: background var(--dur-fast), transform var(--dur-fast);
}
.btn-danger:hover { background: var(--red-600); }
.btn-danger:active { transform: translateY(1px); }

.btn-cancel {
  background: none;
  border: none;
  color: var(--ink-500);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  padding: 11px 14px;
  border-radius: var(--radius-lg);
  transition: background var(--dur-fast), color var(--dur-fast);
}
.btn-cancel:hover { background: var(--paper-200); color: var(--ink-700); }

/* "Box lernen" — a brand learning moment, terracotta */
.box-actions .btn-success {
  background: var(--terracotta-500);
  box-shadow: var(--shadow-brand);
}
.box-actions .btn-success:hover { background: var(--terracotta-600); }

/* big START button on the Karteikasten */
.start-btn-large {
  background: var(--teal-500);
  color: #fff;
  border: none;
  padding: 18px 50px;
  border-radius: var(--radius-pill);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.02em;
  cursor: pointer;
  box-shadow: var(--shadow-app);
  transition: transform var(--dur-fast), background var(--dur-fast);
}
.start-btn-large:hover { background: var(--teal-600); }
.start-btn-large:active { transform: translateY(1px) scale(0.99); }

/* ---------- Floating action buttons ---------- */
.fab-button {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-pill);
  border: none;
  font-size: 22px;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: transform var(--dur-fast), box-shadow var(--dur-fast), background var(--dur-fast);
}
/* primary add = terracotta brand pop */
.fab-button.fab-primary {
  background: var(--terracotta-500);
  color: #fff;
  box-shadow: var(--shadow-brand);
}
.fab-button.fab-primary:hover { background: var(--terracotta-600); transform: translateY(-2px); }
/* secondary (QR) = paper surface */
.fab-button.fab-secondary {
  background: var(--paper-0);
  color: var(--ink-700);
  border: 1px solid var(--paper-300);
  box-shadow: var(--shadow-md);
}
.fab-button.fab-secondary:hover { transform: translateY(-2px); border-color: var(--paper-400); }
.fab-button:active { transform: translateY(0); }

/* ============================================================
   MODALS
   ============================================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(22,28,38,0.55);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  z-index: 100;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
}
.modal {
  background: var(--paper-0);
  width: 100%;
  border-radius: var(--radius-xl);
  padding: 22px;
  border: 1px solid var(--paper-300);
  box-shadow: var(--shadow-lg);
  animation: modalIn var(--dur-base) var(--ease-spring);
}
@keyframes modalIn {
  from { opacity: 0; transform: translateY(12px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.modal h3 { margin-bottom: 16px; font-size: 19px; }
.modal label {
  display: block;
  font-size: 12px;
  color: var(--ink-500);
  margin-bottom: 6px;
  font-weight: 600;
}
.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 6px;
}

/* ---------- Inputs / selects / textarea (global) ---------- */
.modal input,
input.app-field,
select.app-field,
textarea.app-field,
#prompt-modal-input,
.type-input, .cloze-input {
  width: 100%;
  padding: 13px 14px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--paper-400);
  background: var(--paper-50);
  color: var(--ink-900);
  font-size: 16px;
  font-weight: 500;
  outline: none;
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
}
.modal input { margin-bottom: 15px; }
.modal input::placeholder,
.app-field::placeholder,
.type-input::placeholder { color: var(--ink-400); }
.modal input:focus,
input.app-field:focus,
select.app-field:focus,
textarea.app-field:focus,
#prompt-modal-input:focus,
.type-input:focus, .cloze-input:focus {
  border-color: var(--teal-500);
  box-shadow: var(--ring-app);
}
select.app-field {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2351606F' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 38px;
}

.input-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.input-grid.side-by-side { grid-template-columns: 1fr auto 1fr; align-items: end; }
.swap-icon-container {
  color: var(--ink-400);
  font-size: 16px;
  padding-bottom: 13px;
  display: flex;
  justify-content: center;
}
.swap-btn {
  cursor: pointer;
  padding: 6px 8px 13px;
  border-radius: 8px;
  transition: background 0.15s, color 0.15s, transform 0.25s;
  color: var(--terra);
}
.swap-btn:active {
  background: var(--terratint, #F4EDE8);
  transform: rotate(180deg);
}

/* ============================================================
   BOTTOM NAV
   ============================================================ */
#bottom-nav {
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 72px;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  justify-content: space-around;
  align-items: center;
  border-top: 1px solid var(--paper-300);
  padding-bottom: env(safe-area-inset-bottom, 0);
}
.nav-item {
  background: none;
  border: none;
  color: var(--ink-400);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  flex: 1;
  padding: 6px 0;
  transition: color var(--dur-fast);
}
.nav-item [data-lucide], .nav-item svg.lucide { width: 23px; height: 23px; }
.nav-item span { font-size: 10px; font-weight: 700; letter-spacing: 0.01em; }
.nav-item.active { color: var(--teal-600); }
.nav-item:hover { color: var(--ink-600); }
.nav-item.active:hover { color: var(--teal-700); }

/* ============================================================
   KARTEIKASTEN (Leitner) — vertical zig-zag path
   ============================================================ */
.setup-container {
  text-align: center;
  min-height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.setup-container h2 { font-size: 28px; }
.setup-subtitle { color: var(--ink-500); margin-bottom: 24px; font-size: 14px; font-weight: 500; }

.kasten-grid {
  display: flex;
  flex-direction: column-reverse;
  align-items: center;
  gap: 8px;
  margin: 12px 0 18px;
  position: relative;
  padding: 10px 0;
}
.kasten-grid::before {
  content: '';
  position: absolute;
  top: 20px;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  background: linear-gradient(to top, var(--teal-100), var(--teal-400));
  z-index: 0;
  border-radius: 2px;
}
.kasten-item {
  background: var(--paper-0);
  padding: 11px 10px;
  border-radius: var(--radius-card);
  text-align: center;
  border: 1.5px solid var(--paper-300);
  position: relative;
  z-index: 1;
  width: 134px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-base) var(--ease-out), border-color var(--dur-fast), box-shadow var(--dur-fast);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}
.kasten-item:nth-child(1) { transform: translateX(-34px); }
.kasten-item:nth-child(2) { transform: translateX(34px); }
.kasten-item:nth-child(3) { transform: translateX(-34px); }
.kasten-item:nth-child(4) { transform: translateX(34px); }
.kasten-item:nth-child(5) { transform: translateX(-34px); }
.kasten-item:nth-child(6) { transform: translateX(0); width: 152px; border-color: var(--green-500); background: var(--green-50); }

.interactive-grid .kasten-item { cursor: pointer; }
.interactive-grid .kasten-item:hover { border-color: var(--teal-500); box-shadow: var(--shadow-md); }
.interactive-grid .kasten-item:nth-child(1):hover { transform: translateX(-34px) scale(1.05); }
.interactive-grid .kasten-item:nth-child(2):hover { transform: translateX(34px) scale(1.05); }
.interactive-grid .kasten-item:nth-child(3):hover { transform: translateX(-34px) scale(1.05); }
.interactive-grid .kasten-item:nth-child(4):hover { transform: translateX(34px) scale(1.05); }
.interactive-grid .kasten-item:nth-child(5):hover { transform: translateX(-34px) scale(1.05); }
.interactive-grid .kasten-item:nth-child(6):hover { transform: translateX(0) scale(1.05); border-color: var(--green-600); }

.kasten-num { font-size: 13px; font-weight: 700; color: var(--ink-800); display: inline-flex; align-items: center; gap: 5px; }
.kasten-count { font-size: 11px; font-weight: 500; color: var(--ink-500); }
.success-kasten .kasten-num { color: var(--green-600); }
.success-kasten .kasten-count { color: var(--green-600); }

#no-words-msg { color: var(--red-500); margin-top: 18px; font-size: 14px; font-weight: 600; }

/* ============================================================
   QUIZ / FLASHCARD
   ============================================================ */
.quiz-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}
#quiz-progress-text { font-weight: 700; color: var(--ink-500); font-size: 13px; }
.kasten-badge {
  background: var(--teal-50);
  color: var(--teal-700);
  padding: 5px 11px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 800;
  border: 1px solid var(--teal-100);
}

#tts-speed-btn {
  background: var(--paper-0) !important;
  border: 1px solid var(--paper-300) !important;
  color: var(--ink-600) !important;
  border-radius: var(--radius-sm) !important;
  padding: 6px 10px !important;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: 0.02em;
}
.tts-speed-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--paper-0);
  border: 1px solid var(--paper-300);
  border-radius: var(--radius-lg);
  padding: 6px;
  z-index: 200;
  min-width: 150px;
  box-shadow: var(--shadow-lg);
  animation: fadeIn var(--dur-fast) var(--ease-out);
}
.tts-speed-option {
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--ink-600);
  transition: background var(--dur-fast), color var(--dur-fast);
}
.tts-speed-option:hover { background: var(--paper-200); color: var(--ink-900); }
.tts-speed-option.active { background: var(--teal-50); color: var(--teal-700); }

.flashcard-container { perspective: 1200px; height: 300px; margin-bottom: 26px; }
.flashcard {
  width: 100%; height: 100%;
  position: relative;
  transition: transform 0.6s cubic-bezier(0.4, 0.0, 0.2, 1);
  transform-style: preserve-3d;
}
.flashcard.flipped { transform: rotateY(180deg); }
.flashcard-front, .flashcard-back {
  width: 100%; height: 100%;
  position: absolute;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: var(--radius-2xl);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0 28px;
}
.flashcard-front {
  background: var(--paper-0);
  border: 1px solid var(--paper-300);
  box-shadow: var(--shadow-md);
}
.flashcard-back {
  transform: rotateY(180deg);
  background: var(--teal-500);
  box-shadow: var(--shadow-app);
}
.flashcard-front h3 { font-size: 32px; font-weight: 800; text-align: center; color: var(--ink-900); }
.flashcard-back h3  { font-size: 32px; font-weight: 800; text-align: center; color: #fff; }

.quiz-controls { display: flex; flex-direction: column; gap: 12px; }
.action-group { display: flex; gap: 12px; width: 100%; }

/* ============================================================
   BOX LEARNING EXERCISES
   ============================================================ */
.exercise-title {
  font-size: 12px;
  font-weight: 800;
  margin-bottom: 12px;
  text-align: center;
  width: 100%;
  color: var(--ink-400);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.exercise-question {
  font-size: 24px;
  text-align: center;
  margin-bottom: 22px;
  color: var(--ink-900);
  font-weight: 800;
  font-family: var(--font-display);
  letter-spacing: -0.02em;
}

.mc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; width: 100%; max-width: 400px; }
.mc-btn {
  background: var(--paper-0);
  border: 1.5px solid var(--paper-300);
  color: var(--ink-900);
  padding: 16px 8px;
  border-radius: var(--radius-lg);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease-out);
  word-break: break-word;
  box-shadow: var(--shadow-xs);
}
.mc-btn:hover { border-color: var(--teal-300); }
.mc-btn.selected { border-color: var(--teal-500); background: var(--teal-50); }
.mc-btn.correct  { border-color: var(--green-500); background: var(--green-50); color: var(--green-600); }
.mc-btn.wrong    { border-color: var(--red-500); background: var(--red-50); color: var(--red-600); }

.match-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; width: 100%; max-width: 500px; }
.match-btn {
  background: var(--paper-0);
  border: 1.5px solid var(--paper-300);
  color: var(--ink-900);
  padding: 13px 8px;
  border-radius: var(--radius-lg);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease-out);
  word-break: break-word;
  box-shadow: var(--shadow-xs);
}
.match-btn:hover { border-color: var(--teal-300); }
.match-btn.selected { border-color: var(--teal-500); background: var(--teal-50); }
.match-btn.matched { opacity: 0; pointer-events: none; }
.match-btn.error { animation: shake 0.4s; border-color: var(--red-500); background: var(--red-50); }

.build-area {
  min-height: 60px;
  border-bottom: 2px dashed var(--paper-400);
  width: 100%;
  max-width: 400px;
  margin-bottom: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 10px 0;
  align-items: center;
}
.block-bank { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; width: 100%; max-width: 400px; }
.word-block {
  background: var(--paper-0);
  border: 1.5px solid var(--paper-300);
  padding: 11px 16px;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink-900);
  user-select: none;
  box-shadow: var(--shadow-xs);
  transition: transform var(--dur-fast), border-color var(--dur-fast);
}
.word-block:hover { border-color: var(--teal-300); }
.word-block:active { transform: scale(0.95); }

.type-input, .cloze-input { max-width: 400px; text-align: center; font-size: 18px; }

@keyframes shake {
  0%,100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

/* ---------- Difficulty hint / mnemonic ---------- */
.difficulty-hint-card {
  margin-top: 16px;
  width: 100%;
  max-width: 400px;
  background: var(--amber-50);
  border: 1px solid var(--amber-100);
  border-radius: var(--radius-lg);
  padding: 13px 14px;
  animation: fadeIn var(--dur-base) var(--ease-out);
}
.difficulty-hint-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 13px;
  color: var(--amber-600);
  font-weight: 700;
}
.mnemonic-btn {
  background: var(--amber-100);
  border: 1px solid var(--amber-500);
  color: var(--amber-600);
  border-radius: var(--radius-sm);
  padding: 7px 12px;
  font-size: 12px;
  font-weight: 800;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--dur-fast);
  flex-shrink: 0;
}
.mnemonic-btn:hover { background: var(--amber-500); color: #fff; }
.mnemonic-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.mnemonic-output {
  margin-top: 10px;
  font-size: 14px;
  color: var(--ink-800);
  line-height: 1.6;
  background: var(--paper-0);
  border-radius: var(--radius-md);
  padding: 11px 12px;
  border-left: 3px solid var(--amber-500);
}

/* ============================================================
   LISTENING
   ============================================================ */
#view-listening { display: flex; flex-direction: column; height: 100%; }
.listening-header { display: flex; align-items: center; gap: 12px; padding-bottom: 16px; flex-shrink: 0; }
.listening-header-title { font-size: 18px; margin: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.listening-phase { flex: 1; display: flex; flex-direction: column; gap: 16px; overflow-y: auto; padding-bottom: 8px; }

.listening-prog-badge {
  background: var(--paper-200);
  border: 1px solid var(--paper-300);
  border-radius: var(--radius-md);
  padding: 5px 11px;
  font-size: 12px;
  font-weight: 800;
  color: var(--ink-600);
  white-space: nowrap;
  flex-shrink: 0;
}

.btn-listening {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--teal-50);
  border: 1.5px solid var(--teal-100);
  color: var(--teal-700);
  padding: 14px 20px;
  border-radius: var(--radius-lg);
  font-weight: 800;
  font-size: 15px;
  cursor: pointer;
  width: 100%;
  transition: background var(--dur-fast), transform var(--dur-fast);
}
.btn-listening:hover { background: var(--teal-100); transform: translateY(-1px); }

.listening-desc-card {
  background: var(--paper-0);
  border: 1px solid var(--paper-300);
  border-radius: var(--radius-lg);
  padding: 16px 18px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-600);
  box-shadow: var(--shadow-xs);
}
.listening-section { display: flex; flex-direction: column; gap: 10px; }
.listening-section-title {
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-400);
  display: flex;
  align-items: center;
  gap: 6px;
}
.listening-section-title [data-lucide], .listening-section-title svg.lucide { color: var(--terracotta-500); }
.listening-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.listening-chip {
  background: var(--teal-50);
  border: 1px solid var(--teal-100);
  color: var(--teal-700);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 700;
}

.listening-mode-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 4px; }
.listening-mode-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  background: var(--paper-0);
  border: 1.5px solid var(--paper-300);
  border-radius: var(--radius-card);
  padding: 24px 12px;
  cursor: pointer;
  transition: border-color var(--dur-fast), background var(--dur-fast), transform var(--dur-fast);
  text-align: center;
  box-shadow: var(--shadow-xs);
}
.listening-mode-card:hover { border-color: var(--teal-500); background: var(--teal-50); transform: translateY(-2px); }
.listening-mode-icon { font-size: 26px; color: var(--teal-600); }
.listening-mode-label { font-size: 14px; font-weight: 800; color: var(--ink-900); }
.listening-mode-hint { font-size: 11px; color: var(--ink-500); line-height: 1.4; }

.listening-player-meta { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.listening-badge-mode {
  font-size: 12px;
  font-weight: 800;
  padding: 5px 11px;
  border-radius: var(--radius-md);
  background: var(--teal-50);
  border: 1px solid var(--teal-100);
  color: var(--teal-700);
}
.listening-badge-progress { font-size: 12px; font-weight: 800; color: var(--ink-500); margin-left: auto; }

.listening-card {
  background: var(--paper-0);
  border: 1px solid var(--paper-300);
  border-radius: var(--radius-xl);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  animation: fadeIn var(--dur-base) var(--ease-out);
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--dur-base), box-shadow var(--dur-base);
}
.listening-card.is-playing {
  border-color: var(--teal-400);
  box-shadow: var(--ring-app), var(--shadow-md);
}
.listening-speaker-row { display: flex; align-items: center; gap: 8px; }
.speaker-badge {
  width: 30px; height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 800;
  flex-shrink: 0;
}
.speaker-a { background: var(--teal-50); color: var(--teal-700); }
.speaker-b { background: var(--terracotta-50); color: var(--terracotta-700); }
.listening-line-text { font-size: 20px; font-weight: 700; line-height: 1.5; color: var(--ink-900); margin: 0; }

.listening-tts-row { display: flex; align-items: center; gap: 10px; }
.btn-tts-play {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--teal-50);
  border: 1.5px solid var(--teal-100);
  color: var(--teal-700);
  border-radius: var(--radius-md);
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
  transition: background var(--dur-fast), transform var(--dur-fast);
  flex: 1;
}
.btn-tts-play:hover { background: var(--teal-100); }
.btn-tts-stop {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--red-50);
  border: 1.5px solid var(--red-100);
  color: var(--red-500);
  border-radius: var(--radius-md);
  padding: 9px 14px;
  font-size: 14px;
  cursor: pointer;
  transition: background var(--dur-fast);
  flex-shrink: 0;
}
.btn-tts-stop:hover { background: var(--red-100); }

.listening-translation {
  border-top: 1px solid var(--paper-300);
  padding-top: 10px;
  font-size: 14px;
  color: var(--ink-600);
  line-height: 1.5;
}
.listening-show-translation-btn {
  background: none;
  border: 1px solid var(--paper-300);
  border-radius: var(--radius-sm);
  padding: 7px 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-600);
  cursor: pointer;
  align-self: flex-start;
  transition: background var(--dur-fast);
}
.listening-show-translation-btn:hover { background: var(--paper-200); }

.listening-prompt-box {
  background: var(--terracotta-50);
  border: 1px solid var(--terracotta-200);
  border-radius: var(--radius-lg);
  padding: 14px 16px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--terracotta-700);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
  animation: fadeIn var(--dur-base) var(--ease-out);
  flex-shrink: 0;
}
.listening-prompt-box [data-lucide], .listening-prompt-box svg.lucide { font-size: 18px; margin-top: 2px; }

.listening-player-actions { display: flex; flex-direction: column; gap: 10px; flex-shrink: 0; margin-top: 4px; }
.btn-listening-abort {
  background: none;
  border: 1px solid var(--paper-300);
  border-radius: var(--radius-lg);
  color: var(--ink-500);
  padding: 13px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--dur-fast);
}
.btn-listening-abort:hover { background: var(--paper-200); }

.listening-finish-hero { display: flex; flex-direction: column; align-items: center; text-align: center; padding: 16px 0 8px; gap: 8px; }
.listening-finish-icon {
  width: 72px; height: 72px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-pill);
  background: var(--teal-50);
  color: var(--teal-600);
  font-size: 34px;
  margin-bottom: 4px;
}
.listening-finish-title { font-size: 22px; font-weight: 800; margin: 0; }
.listening-finish-count { color: var(--ink-500); font-size: 14px; margin: 0; }

/* ---------- Geschwindigkeits-Regler (Listening + Konversation lernen) ---------- */
.listen-speed-btn {
  background: var(--paper-0) !important;
  border: 1px solid var(--paper-300) !important;
  color: var(--ink-600) !important;
  border-radius: var(--radius-sm) !important;
  padding: 6px 10px !important;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.listen-speed-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--paper-0);
  border: 1px solid var(--paper-300);
  border-radius: var(--radius-lg);
  padding: 6px;
  z-index: 200;
  min-width: 170px;
  box-shadow: var(--shadow-lg);
  animation: fadeIn var(--dur-fast) var(--ease-out);
}
.listen-speed-option {
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--ink-600);
  white-space: nowrap;
  transition: background var(--dur-fast), color var(--dur-fast);
}
.listen-speed-option:hover { background: var(--paper-200); color: var(--ink-900); }
.listen-speed-option.active { background: var(--teal-50); color: var(--teal-700); }

/* ---------- Kasten anklicken: Hinweistext ---------- */
.kasten-hint {
  text-align: center;
  font-size: 12px;
  color: var(--ink-400);
  margin: 10px 0 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

/* ---------- "Konversation lernen"-Button ---------- */
.btn-dialog-trainer {
  background: linear-gradient(135deg, var(--terracotta-500), var(--teal-500));
  color: #fff;
  border: none;
  padding: 15px 20px;
  border-radius: var(--radius-lg);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-fast), box-shadow var(--dur-fast);
}
.btn-dialog-trainer:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-dialog-trainer:active { transform: translateY(0); }

/* ============================================================
   KONVERSATION LERNEN (Dialog-Trainer)
   ============================================================ */
.dialog-shadow-masked {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
  padding: 28px 12px;
  color: var(--ink-400);
  font-size: 14px;
  font-weight: 600;
}
.dialog-shadow-masked [data-lucide], .dialog-shadow-masked svg.lucide { font-size: 26px; color: var(--paper-400); }

.dialog-puzzle-area {
  flex-shrink: 0;
  max-height: 38vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 4px 2px;
}
.dialog-puzzle-empty-hint {
  text-align: center;
  color: var(--ink-400);
  font-size: 13px;
  padding: 18px 0;
}
.dialog-bubble {
  max-width: 82%;
  padding: 10px 14px;
  border-radius: var(--radius-lg);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  animation: fadeIn var(--dur-base) var(--ease-out);
  word-break: break-word;
}
.dialog-bubble.speaker-a {
  align-self: flex-start;
  background: var(--teal-50);
  color: var(--teal-700);
  border: 1px solid var(--teal-100);
  border-bottom-left-radius: var(--radius-xs);
}
.dialog-bubble.speaker-b {
  align-self: flex-end;
  background: var(--terracotta-50);
  color: var(--terracotta-700);
  border: 1px solid var(--terracotta-200);
  border-bottom-right-radius: var(--radius-xs);
}

.dialog-puzzle-pool {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow-y: auto;
  padding: 4px 2px 8px;
  border-top: 1px dashed var(--paper-400);
  padding-top: 14px;
}
.dialog-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--paper-0);
  border: 1.5px solid var(--paper-300);
  border-radius: var(--radius-lg);
  padding: 12px 14px;
  cursor: pointer;
  box-shadow: var(--shadow-xs);
  transition: border-color var(--dur-fast), transform var(--dur-fast);
}
.dialog-chip:hover { border-color: var(--teal-300); }
.dialog-chip:active { transform: scale(0.98); }
.dialog-chip.error { animation: shake 0.4s; border-color: var(--red-500); background: var(--red-50); }
.dialog-chip-badge { flex-shrink: 0; width: 26px; height: 26px; font-size: 11px; }
.dialog-chip-textwrap { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.dialog-chip-text { font-size: 14px; font-weight: 600; color: var(--ink-900); line-height: 1.4; }

/* ---------- Umschrift / Lesehilfe (Sprachen mit eigener Schrift) ---------- */
/* Zeigt z.B. griechische Zeilen zusätzlich in lateinischen Buchstaben,
   damit man den Dialog lernen kann, ohne die Schrift lesen zu können. */
/* ============================================================
   ÜBERSETZER — Richtungswechsel & Standard-Sprachpaar
   ============================================================ */
.trans-controls { display: flex; gap: 10px; align-items: stretch; }

.trans-direction-btn {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--teal-50);
  border: 1.5px solid var(--teal-100);
  color: var(--teal-700);
  border-radius: var(--radius-lg);
  padding: 12px 16px;
  cursor: pointer;
  text-align: left;
  transition: background var(--dur-fast), border-color var(--dur-fast), transform var(--dur-fast);
}
.trans-direction-btn:hover { background: var(--teal-100); border-color: var(--teal-300); }
.trans-direction-btn:active { transform: scale(0.985); }
.trans-direction-btn [data-lucide], .trans-direction-btn svg.lucide { flex-shrink: 0; width: 20px; height: 20px; }
.trans-direction-inner { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
#trans-direction-label { font-size: 15px; font-weight: 800; line-height: 1.2; }
.trans-direction-hint { font-size: 11px; font-weight: 600; opacity: 0.75; }

.trans-default-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--paper-0);
  border: 1.5px solid var(--paper-300);
  color: var(--ink-600);
  border-radius: var(--radius-lg);
  padding: 12px 14px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--dur-fast), border-color var(--dur-fast), color var(--dur-fast);
}
.trans-default-btn:hover { border-color: var(--terracotta-200); color: var(--terracotta-700); }
.trans-default-btn [data-lucide], .trans-default-btn svg.lucide { width: 16px; height: 16px; }
.trans-default-btn.is-default {
  background: var(--terracotta-50);
  border-color: var(--terracotta-200);
  color: var(--terracotta-700);
}
.trans-default-btn.is-default svg.lucide { fill: currentColor; }

/* ---------- Vorlesen im Übersetzer ---------- */
.trans-action-row { display: flex; gap: 10px; align-items: stretch; }

.trans-speak-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  background: var(--teal-50);
  border: 1.5px solid var(--teal-100);
  color: var(--teal-700);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: background var(--dur-fast), border-color var(--dur-fast);
}
.trans-speak-btn:hover { background: var(--teal-100); }
.trans-speak-btn [data-lucide], .trans-speak-btn svg.lucide { width: 20px; height: 20px; }
.trans-speak-btn.is-speaking {
  background: var(--red-50);
  border-color: var(--red-100);
  color: var(--red-500);
}

.trans-speak-out-btn {
  margin-top: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  background: var(--teal-50);
  border: 1.5px solid var(--teal-100);
  color: var(--teal-700);
  border-radius: var(--radius-md);
  padding: 11px 18px;
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
  transition: background var(--dur-fast), border-color var(--dur-fast);
}
.trans-speak-out-btn:hover { background: var(--teal-100); }
.trans-speak-out-btn [data-lucide], .trans-speak-out-btn svg.lucide { width: 16px; height: 16px; }
.trans-speak-out-btn.is-speaking {
  background: var(--red-50);
  border-color: var(--red-100);
  color: var(--red-500);
}

.trans-voice-note {
  margin: 8px 0 0;
  font-size: 12px;
  line-height: 1.45;
  color: var(--amber-600);
  font-weight: 600;
}

.trans-default-msg {
  margin: -4px 0 0;
  font-size: 12px;
  font-weight: 600;
  color: var(--green-600);
}
.trans-greeklish-hint {
  margin: -6px 0 0;
  font-size: 12px;
  line-height: 1.45;
  color: var(--ink-500);
  display: flex;
  align-items: flex-start;
  gap: 6px;
}
.trans-greeklish-hint [data-lucide], .trans-greeklish-hint svg.lucide {
  width: 14px; height: 14px; flex-shrink: 0; margin-top: 2px; color: var(--teal-600);
}

.line-translit {
  margin: -4px 0 0;
  font-size: 14px;
  font-weight: 600;
  font-style: italic;
  color: var(--teal-700);
  line-height: 1.45;
  letter-spacing: 0.01em;
}
.dialog-chip-translit {
  font-size: 12px;
  font-style: italic;
  font-weight: 600;
  color: var(--teal-700);
  line-height: 1.35;
}
.dialog-bubble-translit {
  display: block;
  margin-top: 3px;
  font-size: 12px;
  font-style: italic;
  font-weight: 600;
  opacity: 0.85;
}

/* ============================================================
   LEARNING OVERLAY VIEWS (fullscreen)
   ============================================================ */
#view-box-learning,
#view-box-learning-results {
  position: absolute;
  inset: 0;
  z-index: 500;
  background: var(--paper-100);
  display: flex;
  flex-direction: column;
  max-width: 100%;
}
#view-box-learning.hidden,
#view-box-learning-results.hidden { display: none !important; }
#view-box-learning.active-view,
#view-box-learning-results.active-view { display: flex !important; }
#view-listening.hidden { display: none !important; }
#view-listening.active-view { display: flex !important; }
#view-dialog-trainer { display: flex; flex-direction: column; height: 100%; }
#view-dialog-trainer.hidden { display: none !important; }
#view-dialog-trainer.active-view { display: flex !important; }

.learn-topbar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  background: var(--paper-100);
  border-bottom: 1px solid var(--paper-300);
  flex-shrink: 0;
}
.learn-close {
  background: none;
  border: none;
  color: var(--ink-500);
  font-size: 20px;
  cursor: pointer;
  flex-shrink: 0;
  display: inline-flex;
}
.learn-close:hover { color: var(--ink-800); }
.learn-progress-track {
  flex: 1;
  height: 10px;
  background: var(--paper-300);
  border-radius: var(--radius-pill);
  overflow: hidden;
}
.learn-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--teal-500);
  transition: width var(--dur-base) var(--ease-out);
  border-radius: var(--radius-pill);
}
.learn-content {
  flex: 1;
  overflow-y: auto;
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.learn-footer {
  padding: 16px 20px calc(16px + env(safe-area-inset-bottom, 0));
  background: var(--paper-100);
  border-top: 1px solid var(--paper-300);
  flex-shrink: 0;
}
#btn-box-learn-check { font-size: 16px; font-weight: 800; }

/* ============================================================
   RESULTS
   ============================================================ */
.result-hero-icon {
  font-size: 52px;
  color: var(--terracotta-500);
  margin-bottom: 14px;
}
.result-card {
  background: var(--paper-0);
  padding: 20px;
  border-radius: var(--radius-card);
  width: 100%;
  max-width: 350px;
  margin-bottom: 16px;
  border: 1px solid var(--paper-300);
  box-shadow: var(--shadow-sm);
}
.result-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 14px;
  color: var(--ink-600);
}
.result-row.total {
  border-top: 1px solid var(--paper-300);
  padding-top: 12px;
  margin-bottom: 0;
  font-weight: 700;
  color: var(--ink-900);
}

.animated-dot {
  position: absolute;
  width: 14px; height: 14px;
  border-radius: 50%;
  z-index: 600;
  pointer-events: none;
  transition: transform 0.8s cubic-bezier(0.25, 1, 0.5, 1), opacity 0.3s;
}
.animated-dot.dot-correct { background: var(--green-500); box-shadow: 0 0 10px rgba(61,139,107,0.6); }
.animated-dot.dot-wrong   { background: var(--red-500);   box-shadow: 0 0 10px rgba(200,54,43,0.5); }

/* ============================================================
   HISTORY
   ============================================================ */
.history-stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  width: 100%;
  background: var(--paper-0);
  border-radius: var(--radius-card);
  padding: 16px 10px;
  margin-bottom: 18px;
  border: 1px solid var(--paper-300);
  box-shadow: var(--shadow-xs);
}
.history-stat-cell { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.history-stat-value { font-size: 20px; font-weight: 800; color: var(--teal-600); font-family: var(--font-display); }
.history-stat-label { font-size: 10px; color: var(--ink-400); text-align: center; text-transform: uppercase; letter-spacing: 0.05em; font-weight: 700; }

.history-item {
  background: var(--paper-0);
  border-radius: var(--radius-lg);
  padding: 14px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  border: 1px solid var(--paper-300);
  box-shadow: var(--shadow-xs);
  transition: background var(--dur-fast), border-color var(--dur-fast);
  margin-bottom: 10px;
}
.history-item:hover { border-color: var(--paper-400); background: var(--paper-50); }
.history-item-left { display: flex; flex-direction: column; gap: 3px; }
.history-item-right { display: flex; align-items: center; gap: 10px; }
.history-item-date { font-size: 13px; font-weight: 700; color: var(--ink-900); }
.history-item-score { font-size: 12px; color: var(--ink-500); }
.history-item-acc { font-size: 20px; font-weight: 800; font-family: var(--font-display); }
.history-item [data-lucide], .history-item svg.lucide { color: var(--ink-400); }

/* ============================================================
   SMALL UTILITIES (icon buttons, secondary buttons, fields, FAB)
   ============================================================ */
.icon-btn {
  background: none;
  border: none;
  color: var(--ink-400);
  cursor: pointer;
  padding: 4px 6px;
  margin-left: 6px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  line-height: 1;
  display: inline-flex;
  vertical-align: middle;
  transition: color var(--dur-fast), background var(--dur-fast);
}
.icon-btn:hover { color: var(--ink-700); background: var(--paper-200); }
.icon-btn.danger { color: var(--red-500); opacity: 0.6; }
.icon-btn.danger:hover { opacity: 1; background: var(--red-50); }

.btn-secondary {
  background: var(--paper-0);
  color: var(--ink-800);
  border: 1px solid var(--paper-300);
  padding: 14px 18px;
  border-radius: var(--radius-lg);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  box-shadow: var(--shadow-xs);
  transition: background var(--dur-fast), border-color var(--dur-fast), transform var(--dur-fast);
}
.btn-secondary:hover { background: var(--paper-50); border-color: var(--paper-400); }
.btn-secondary:active { transform: translateY(1px); }
.btn-secondary [data-lucide], .btn-secondary svg.lucide { color: var(--teal-600); }

.field-label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  color: var(--ink-500);
  letter-spacing: 0.01em;
}
.field-hint {
  font-size: 11px;
  color: var(--ink-400);
  margin-top: 6px;
  line-height: 1.5;
}

.fab-stack {
  position: absolute;
  bottom: 88px;
  right: 18px;
  display: none;
  flex-direction: column;
  gap: 14px;
  z-index: 60;
}
/* Show floating actions only on the Boxen view */
#app:has(#view-boxes.active-view) .fab-stack { display: flex; }

/* ============================================================
   QR / generic helpers
   ============================================================ */
hr { border: none; border-top: 1px solid var(--paper-300); }
::-webkit-scrollbar { width: 0; background: transparent; }

/* respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}