/* ============================================================
   Design Tokens
   ============================================================ */
:root {
  /* Bootstrap-Overrides — damit alle Bootstrap-Komponenten dem Theme folgen */
  --bs-body-color: #1a1d21;
  --bs-body-bg: #f6f7f9;
  --bs-secondary-color: #5c646d;
  --bs-tertiary-color: #8a9098;
  --bs-border-color: #e4e7eb;
  --bs-emphasis-color: #1a1d21;

  /* Brand */
  --brand-600: #c82333;
  --brand-500: #dc3545;
  --brand-400: #e55a69;
  --accent-500: #fd7e14;
  --accent-400: #ffa050;
  --accent-warm: #ffc107;

  /* Neutrals — Light */
  --bg-app: #f6f7f9;
  --bg-surface: #ffffff;
  --bg-subtle: #f1f3f5;
  --bg-muted: #e9ecef;
  --bg-inverse: #1a1d21;

  --border: #e4e7eb;
  --border-strong: #cdd3da;
  --border-focus: var(--brand-500);

  --text: #1a1d21;
  --text-muted: #5c646d;
  --text-subtle: #8a9098;
  --text-on-brand: #ffffff;

  /* Semantic */
  --success: #16a34a;
  --success-bg: #dcfce7;
  --warning: #d97706;
  --warning-bg: #fef3c7;
  --danger: #dc2626;
  --danger-bg: #fee2e2;
  --info: #0284c7;
  --info-bg: #e0f2fe;

  /* Spacing (4px scale) */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.5rem;
  --sp-6: 2rem;
  --sp-7: 3rem;

  /* Radius */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 20px;

  /* Shadows — subtle */
  --sh-xs: 0 1px 2px rgba(16, 24, 40, 0.05);
  --sh-sm: 0 1px 3px rgba(16, 24, 40, 0.08), 0 1px 2px rgba(16, 24, 40, 0.04);
  --sh-md: 0 4px 8px -2px rgba(16, 24, 40, 0.10), 0 2px 4px -2px rgba(16, 24, 40, 0.06);
  --sh-lg: 0 12px 20px -4px rgba(16, 24, 40, 0.10), 0 4px 8px -4px rgba(16, 24, 40, 0.04);

  /* Motion */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur-fast: 120ms;
  --dur: 200ms;

  /* Layout */
  --nav-h: 64px;
  --content-max: 1200px;
}

[data-theme="dark"] {
  /* Bootstrap-Overrides für Dark Mode */
  --bs-body-color: #e9ecef;
  --bs-body-bg: #0f1115;
  --bs-secondary-color: #a8afb7;
  --bs-tertiary-color: #7a818a;
  --bs-border-color: #2a2f38;
  --bs-emphasis-color: #ffffff;
  color-scheme: dark;

  --bg-app: #0f1115;
  --bg-surface: #171a20;
  --bg-subtle: #1e222a;
  --bg-muted: #262b33;
  --bg-inverse: #f6f7f9;

  --border: #2a2f38;
  --border-strong: #3a4049;

  --text: #e9ecef;
  --text-muted: #a8afb7;
  --text-subtle: #7a818a;

  --success-bg: rgba(22, 163, 74, 0.15);
  --warning-bg: rgba(217, 119, 6, 0.15);
  --danger-bg: rgba(220, 38, 38, 0.15);
  --info-bg: rgba(2, 132, 199, 0.15);

  --sh-xs: 0 1px 2px rgba(0, 0, 0, 0.35);
  --sh-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --sh-md: 0 6px 12px -4px rgba(0, 0, 0, 0.5);
  --sh-lg: 0 16px 28px -8px rgba(0, 0, 0, 0.55);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bs-body-color: #e9ecef;
    --bs-body-bg: #0f1115;
    --bs-secondary-color: #a8afb7;
    --bs-tertiary-color: #7a818a;
    --bs-border-color: #2a2f38;
    --bs-emphasis-color: #ffffff;
    color-scheme: dark;

    --bg-app: #0f1115;
    --bg-surface: #171a20;
    --bg-subtle: #1e222a;
    --bg-muted: #262b33;
    --bg-inverse: #f6f7f9;
    --border: #2a2f38;
    --border-strong: #3a4049;
    --text: #e9ecef;
    --text-muted: #a8afb7;
    --text-subtle: #7a818a;
    --success-bg: rgba(22, 163, 74, 0.15);
    --warning-bg: rgba(217, 119, 6, 0.15);
    --danger-bg: rgba(220, 38, 38, 0.15);
    --info-bg: rgba(2, 132, 199, 0.15);
    --sh-xs: 0 1px 2px rgba(0, 0, 0, 0.35);
    --sh-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
    --sh-md: 0 6px 12px -4px rgba(0, 0, 0, 0.5);
    --sh-lg: 0 16px 28px -8px rgba(0, 0, 0, 0.55);
  }
}

/* ============================================================
   Base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-app);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--text);
  margin-block: 0 0.5em;
}

h1 { font-size: clamp(1.75rem, 1.2rem + 1.8vw, 2.25rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.4rem, 1rem + 1.2vw, 1.75rem); }
h3 { font-size: clamp(1.2rem, 0.95rem + 0.8vw, 1.4rem); }
h4 { font-size: 1.15rem; }
h5 { font-size: 1rem; font-weight: 600; }
h6 { font-size: 0.9rem; font-weight: 600; }

a { color: var(--brand-500); text-decoration: none; transition: color var(--dur-fast) var(--ease); }
a:hover { color: var(--brand-600); }

kbd {
  background: var(--bg-muted);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.1em 0.4em;
  font-size: 0.85em;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--text);
}

/* Focus ring */
:focus-visible {
  outline: 2px solid var(--brand-500);
  outline-offset: 2px;
}

.btn:focus, .btn:active:focus, .form-control:focus, .form-check-input:focus, .form-select:focus {
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand-500) 25%, transparent);
  border-color: var(--brand-500);
}

/* ============================================================
   Navbar
   ============================================================ */
.navbar {
  background: var(--bg-surface) !important;
  border-bottom: 1px solid var(--border);
  box-shadow: var(--sh-xs);
  padding: 0.5rem 1rem;
  min-height: var(--nav-h);
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.15rem !important;
  color: var(--text) !important;
  text-shadow: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.navbar-brand i { color: var(--brand-500); }

.navbar-dark .navbar-brand,
.navbar-dark .navbar-nav .nav-link {
  color: var(--text) !important;
}

.navbar .nav-link {
  color: var(--text-muted) !important;
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.5rem 0.85rem;
  border-radius: var(--r-md);
  margin: 0 2px;
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.navbar .nav-link:hover {
  background: var(--bg-subtle);
  color: var(--text) !important;
  transform: none;
}

.navbar .nav-link.active,
.navbar .nav-item.dropdown.active > .nav-link {
  background: var(--bg-subtle);
  color: var(--brand-500) !important;
  font-weight: 600;
}

.navbar .nav-link.active::after { display: none; }

.navbar-toggler {
  border: 1px solid var(--border);
  padding: 0.35rem 0.55rem;
  border-radius: var(--r-md);
}
.navbar-toggler:focus { box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand-500) 25%, transparent); }
.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='%235c646d' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E");
}

.dropdown-menu {
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-md);
  padding: 0.35rem;
  background: var(--bg-surface) !important;
  /* Höher als der sticky .toast-stack (z-index 1040), damit das Dropdown nicht
     von Flash-Messages durchschnitten wird. */
  z-index: 1050;
}

/* Ausgefahrenes Mobile-Navbar-Menü (Bootstrap-Collapse) soll solide bleiben,
   sonst scheint der Seiteninhalt durch. */
.navbar-collapse.show,
.navbar-collapse.collapsing {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--sh-md);
  margin-top: 0.5rem;
  padding: 0.5rem;
}

.dropdown-item {
  border-radius: var(--r-sm);
  padding: 0.5rem 0.75rem;
  font-size: 0.92rem;
  color: var(--text);
  transition: background var(--dur-fast) var(--ease);
}
.dropdown-item:hover, .dropdown-item:focus {
  background: var(--bg-subtle);
  color: var(--text);
}
.dropdown-divider { border-color: var(--border); margin: 0.35rem 0; }

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  border-radius: var(--r-md);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.55rem 1rem;
  transition: background var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease),
              transform var(--dur-fast) var(--ease),
              box-shadow var(--dur-fast) var(--ease);
  letter-spacing: 0;
  text-transform: none;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  justify-content: center;
}

.btn-lg {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  border-radius: var(--r-md);
}

.btn-sm {
  padding: 0.35rem 0.7rem;
  font-size: 0.85rem;
  border-radius: var(--r-sm);
}

.btn-primary {
  background: var(--brand-500);
  color: var(--text-on-brand);
  box-shadow: var(--sh-xs);
}
.btn-primary:hover {
  background: var(--brand-600);
  color: var(--text-on-brand);
  transform: translateY(-1px);
  box-shadow: var(--sh-sm);
}
.btn-primary:active { transform: translateY(0); }

.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: color-mix(in srgb, var(--success) 85%, black); color: #fff; }

.btn-warning {
  background: var(--accent-500);
  color: #fff;
}
.btn-warning:hover { background: color-mix(in srgb, var(--accent-500) 85%, black); color: #fff; }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: color-mix(in srgb, var(--danger) 85%, black); color: #fff; }

.btn-secondary { background: var(--bg-muted); color: var(--text); border-color: var(--border); }
.btn-secondary:hover { background: var(--bg-subtle); color: var(--text); }

.btn-light { background: var(--bg-surface); color: var(--text); border-color: var(--border); }
.btn-light:hover { background: var(--bg-subtle); }

.btn-outline-primary {
  color: var(--brand-500);
  border-color: var(--brand-500);
  background: transparent;
}
.btn-outline-primary:hover {
  background: var(--brand-500);
  color: #fff;
}

.btn-outline-secondary {
  color: var(--text-muted);
  border-color: var(--border-strong);
  background: transparent;
}
.btn-outline-secondary:hover {
  background: var(--bg-subtle);
  color: var(--text);
  border-color: var(--border-strong);
}

.btn-outline-success { color: var(--success); border-color: var(--success); }
.btn-outline-success:hover { background: var(--success); color: #fff; }
.btn-outline-warning { color: var(--warning); border-color: var(--warning); }
.btn-outline-warning:hover { background: var(--warning); color: #fff; }
.btn-outline-danger { color: var(--danger); border-color: var(--danger); }
.btn-outline-danger:hover { background: var(--danger); color: #fff; }
.btn-outline-info { color: var(--info); border-color: var(--info); }
.btn-outline-info:hover { background: var(--info); color: #fff; }

.btn:disabled, .btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* ============================================================
   Cards
   ============================================================ */
.card {
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-xs);
  background: var(--bg-surface);
  transition: box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
  overflow: hidden;
}

.card:hover {
  transform: none;
  box-shadow: var(--sh-sm);
}

.card-header {
  background: var(--bg-subtle);
  color: var(--text);
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.25rem;
  font-weight: 600;
}

.card-body { padding: 1.25rem; }
.card-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding: 1rem 1.25rem;
}

.simple-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  transition: box-shadow var(--dur-fast) var(--ease);
}
.simple-card:hover {
  transform: none;
  box-shadow: var(--sh-sm);
}

/* ============================================================
   Stats Cards
   ============================================================ */
.stats-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 1.25rem;
  text-align: left;
  box-shadow: var(--sh-xs);
  transition: box-shadow var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
  position: relative;
}

.stats-card:hover {
  box-shadow: var(--sh-sm);
  transform: none;
  border-color: var(--border-strong);
}

.stats-icon {
  font-size: 1.4rem;
  margin-bottom: 0.75rem;
  color: var(--brand-500);
  background: none;
  -webkit-text-fill-color: initial;
  background-clip: initial;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--r-md);
  background: color-mix(in srgb, var(--brand-500) 10%, transparent);
}

.stats-card h3 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text);
  margin: 0;
  letter-spacing: -0.02em;
}

.stats-card:not([style*="gradient"]):not([class*="bg-"]) small,
.stats-card:not([style*="gradient"]):not([class*="bg-"]) .text-muted {
  color: var(--text-muted) !important;
  font-size: 0.85rem;
}

/* Gradient-Cards: Sub-Text soll leicht gedimmt bleiben (nicht voll-weiß wie Headline),
   aber auf dem satten Gradient lesbar — nicht das dunkle --text-muted. */
.stats-card[style*="gradient"] small,
.stats-card[class*="bg-"] small {
  color: rgba(255, 255, 255, 0.85) !important;
  font-size: 0.85rem;
}

/* ============================================================
   Gradient Text — sparsam einsetzen
   ============================================================ */
.fire-gradient-text {
  background: linear-gradient(90deg, var(--brand-500), var(--accent-500));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
}

/* Legacy-Header-Dämpfung: viele Views nutzen noch display-4/display-5 kombiniert
   mit fire-gradient-text. Wir bringen das runter auf eine moderne H1-Größe,
   damit das Design konsistent zu neu gestalteten Views bleibt. */
h1.display-4.fire-gradient-text,
h1.display-5.fire-gradient-text,
.display-4.fire-gradient-text {
  font-size: clamp(1.75rem, 1.2rem + 1.8vw, 2.25rem) !important;
  font-weight: 700 !important;
  letter-spacing: -0.015em;
  line-height: 1.2;
  margin-bottom: 0.5rem !important;
}

/* Auf Subheadings wird der Gradient oft zu aufdringlich — dezenter stylen */
h4.fire-gradient-text, h5.fire-gradient-text, h6.fire-gradient-text {
  font-weight: 600;
}

/* ============================================================
   Hero Section
   ============================================================ */
.hero-section {
  background: linear-gradient(135deg, var(--brand-600) 0%, var(--brand-500) 55%, var(--accent-500) 100%);
  color: #fff;
  padding: clamp(3rem, 8vw, 5rem) 1rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-section::before { display: none; }

.hero-content { position: relative; z-index: 1; max-width: 720px; margin: 0 auto; }

.hero-content h1 {
  color: #fff;
  font-weight: 800;
  font-size: clamp(1.8rem, 1rem + 3vw, 2.6rem);
  margin-bottom: 0.75rem;
}

.hero-content .lead {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.05rem;
  margin-bottom: 1.75rem;
}

.hero-content .btn-light {
  background: #fff;
  color: var(--brand-600);
  border: none;
  font-weight: 600;
}
.hero-content .btn-light:hover {
  background: #fff;
  color: var(--brand-600);
  transform: translateY(-1px);
  box-shadow: var(--sh-md);
}

/* ============================================================
   Forms
   ============================================================ */
.form-control, .form-select {
  border-radius: var(--r-md);
  border: 1px solid var(--border);
  padding: 0.6rem 0.85rem;
  font-size: 0.95rem;
  background: var(--bg-surface);
  color: var(--text);
  transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}

.form-control::placeholder { color: var(--text-subtle); }

.form-control:focus, .form-select:focus {
  border-color: var(--brand-500);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand-500) 20%, transparent);
  background: var(--bg-surface);
  color: var(--text);
}

.form-label { font-weight: 500; color: var(--text); margin-bottom: 0.35rem; }
.form-text { color: var(--text-muted); font-size: 0.85rem; }

.form-check-input {
  border-color: var(--border-strong);
  background-color: var(--bg-surface);
  /* Bootstrap-Default Größe nicht überschreiben — sonst überlappt sie das Label */
  width: 1em;
  height: 1em;
  margin-top: 0.3em;
}
.form-check-input:checked {
  background-color: var(--brand-500);
  border-color: var(--brand-500);
}
.form-check-input:focus {
  border-color: var(--brand-500);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand-500) 20%, transparent);
}
.form-check-label,
.form-label,
label {
  color: var(--text);
  cursor: pointer;
  user-select: none;
}

/* File-Input (Datei auswählen) — beide Modes */
.form-control[type="file"] {
  padding: 0;
  overflow: hidden;
  display: flex;
  align-items: stretch;
}
.form-control[type="file"]::file-selector-button {
  background-color: var(--bg-subtle);
  color: var(--text);
  border: 0;
  border-inline-end: 1px solid var(--border);
  padding: 0.6rem 1rem;
  margin: 0;
  margin-inline-end: 0.85rem;
  font-weight: 500;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.form-control[type="file"]::file-selector-button:hover {
  background-color: var(--bg-muted);
  color: var(--text);
}
.form-control[type="file"]::-webkit-file-upload-button {
  background-color: var(--bg-subtle);
  color: var(--text);
  border: 0;
  border-inline-end: 1px solid var(--border);
  padding: 0.6rem 1rem;
  margin: 0;
  margin-inline-end: 0.85rem;
  font-weight: 500;
  cursor: pointer;
}
.form-control[type="file"]::-webkit-file-upload-button:hover {
  background-color: var(--bg-muted);
}

.input-group-text {
  background: var(--bg-subtle);
  border-color: var(--border);
  color: var(--text-muted);
}

/* ============================================================
   Quiz-specific
   ============================================================ */
.quiz-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: clamp(1.25rem, 2vw, 2rem);
  margin: 1rem 0;
  box-shadow: var(--sh-sm);
}

.answer-option {
  background: var(--bg-surface);
  border: 2px solid var(--border);
  border-radius: var(--r-md);
  padding: 0.9rem 1rem;
  margin: 0.5rem 0;
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease),
              background var(--dur-fast) var(--ease),
              transform var(--dur-fast) var(--ease);
  color: var(--text);
  display: flex;
  align-items: center;
}

.answer-option:hover {
  border-color: var(--accent-500);
  background: color-mix(in srgb, var(--accent-500) 6%, var(--bg-surface));
}

.answer-option.selected {
  border-color: var(--brand-500);
  background: color-mix(in srgb, var(--brand-500) 8%, var(--bg-surface));
  font-weight: 600;
}

.answer-option:active { transform: scale(0.995); }

.answer-option .badge {
  min-width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.9rem;
}

.question-number {
  background: linear-gradient(135deg, var(--brand-500), var(--accent-500));
  color: #fff;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}

/* ============================================================
   Progress
   ============================================================ */
.progress {
  background: var(--bg-muted);
  border-radius: 999px;
  overflow: hidden;
  height: 8px;
}
.progress-bar {
  background: linear-gradient(90deg, var(--brand-500), var(--accent-500));
  transition: width var(--dur) var(--ease);
}
.progress-bar.bg-success { background: var(--success); }
.progress-bar.bg-info { background: var(--info); }
.progress-bar.bg-warning { background: var(--accent-500); }
.progress-bar.bg-danger { background: var(--danger); }

.progress-modern { height: 10px; background: var(--bg-muted); border-radius: 999px; overflow: hidden; }
.progress-modern .progress-bar { background: linear-gradient(90deg, var(--brand-500), var(--accent-500)); }

/* ============================================================
   Badges
   ============================================================ */
.badge {
  font-weight: 500;
  padding: 0.35em 0.65em;
  border-radius: var(--r-sm);
  font-size: 0.78rem;
}
.badge.bg-primary   { background-color: var(--brand-500) !important; color: #fff !important; }
.badge.bg-secondary { background-color: var(--bg-muted) !important; color: var(--text) !important; }
.badge.bg-success   { background-color: var(--success) !important; color: #fff !important; }
.badge.bg-warning   { background-color: var(--accent-500) !important; color: #fff !important; }
.badge.bg-danger    { background-color: var(--danger) !important; color: #fff !important; }
.badge.bg-info      { background-color: var(--info) !important; color: #fff !important; }
.badge.bg-dark      { background-color: var(--text) !important; color: var(--bg-surface) !important; }

/* ============================================================
   Tables
   ============================================================ */
.table {
  /* Bootstrap-CSS-Variablen auf Theme-Variablen mappen, damit Dark-Mode sauber greift */
  --bs-table-color: var(--text);
  --bs-table-bg: transparent;
  --bs-table-border-color: var(--border);
  --bs-table-striped-color: var(--text);
  --bs-table-striped-bg: var(--bg-subtle);
  --bs-table-hover-color: var(--text);
  --bs-table-hover-bg: var(--bg-muted);
  --bs-table-active-color: var(--text);
  --bs-table-active-bg: var(--bg-muted);

  color: var(--text);
  border-color: var(--border);
}
.table > :not(caption) > * > * {
  background-color: transparent;
  border-bottom-color: var(--border);
}
.table thead th {
  background: var(--bg-subtle);
  color: var(--text);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: none;
  letter-spacing: 0;
  border-bottom: 1px solid var(--border);
}
.table-hover tbody tr:hover > * {
  background-color: var(--bg-subtle);
  color: var(--text);
}

.table-modern {
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--sh-xs);
  border: 1px solid var(--border);
}
.table-modern thead {
  background: var(--bg-subtle);
  color: var(--text);
}

/* ============================================================
   Alerts
   ============================================================ */
.alert {
  border: 1px solid transparent;
  border-radius: var(--r-md);
  padding: 0.85rem 1rem;
  margin: 0 0 1rem;
  font-size: 0.95rem;
}
.alert-success {
  background: var(--success-bg);
  color: var(--success);
  border-color: color-mix(in srgb, var(--success) 25%, transparent);
}
.alert-warning {
  background: var(--warning-bg);
  color: var(--warning);
  border-color: color-mix(in srgb, var(--warning) 25%, transparent);
}
.alert-danger {
  background: var(--danger-bg);
  color: var(--danger);
  border-color: color-mix(in srgb, var(--danger) 25%, transparent);
}
.alert-info {
  background: var(--info-bg);
  color: var(--info);
  border-color: color-mix(in srgb, var(--info) 25%, transparent);
}
.alert-modern { border: 1px solid transparent; border-radius: var(--r-md); padding: 0.85rem 1rem; }
.btn-close { filter: none; opacity: 0.5; }
.btn-close:hover { opacity: 0.85; }

/* Toast-Stack (Flash messages) */
.toast-stack {
  position: sticky;
  top: 0;
  z-index: 1040;
  margin-bottom: 1rem;
}
.app-toast {
  border-radius: var(--r-md);
  animation: toastIn var(--dur) var(--ease);
  margin-bottom: 0.5rem;
}
@keyframes toastIn {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.app-toast.fade-out {
  animation: toastOut var(--dur) var(--ease) forwards;
}
@keyframes toastOut {
  to { opacity: 0; transform: translateY(-8px); max-height: 0; padding-top: 0; padding-bottom: 0; margin-top: 0; margin-bottom: 0; }
}

/* ============================================================
   Empty State
   ============================================================ */
.empty-state {
  text-align: center;
  padding: clamp(2rem, 5vw, 3.5rem) 1.25rem;
  background: var(--bg-surface);
  border: 1px dashed var(--border-strong);
  border-radius: var(--r-lg);
}
.empty-state .empty-icon {
  font-size: 2.25rem;
  color: var(--brand-500);
  background: color-mix(in srgb, var(--brand-500) 10%, transparent);
  display: inline-flex;
  width: 64px;
  height: 64px;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  margin-bottom: 1rem;
  -webkit-background-clip: initial;
  background-clip: initial;
  -webkit-text-fill-color: initial;
}
.empty-state h5 {
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.empty-state p {
  color: var(--text-muted);
  max-width: 440px;
  margin: 0 auto 1.25rem;
}

/* ============================================================
   Submit hint + celebrate + streak flame
   ============================================================ */
.submit-hint {
  display: inline-block;
  padding: 0.4rem 0.85rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 999px;
  margin-bottom: 0.75rem;
}

.streak-flame {
  display: inline-block;
  animation: flameFlicker 2s ease-in-out infinite;
}
@keyframes flameFlicker {
  0%, 100% { transform: scale(1) rotate(-2deg); }
  50%      { transform: scale(1.06) rotate(2deg); }
}

.stats-card.celebrate { position: relative; overflow: hidden; }
.stats-card.celebrate::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 40%, color-mix(in srgb, var(--accent-warm) 30%, transparent) 50%, transparent 60%);
  animation: celebrateShine 4s ease-in-out infinite;
  pointer-events: none;
}
@keyframes celebrateShine {
  0%, 100% { transform: translateX(-100%); }
  50%      { transform: translateX(100%); }
}

/* Form loading */
.form-loading { position: relative; pointer-events: none; opacity: 0.7; }
.form-loading::after {
  content: '';
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--bg-surface) 60%, transparent);
  backdrop-filter: blur(1px);
  z-index: 10;
}
.spinner-submit {
  display: inline-block;
  width: 1em; height: 1em;
  border: 2px solid rgba(255,255,255,0.5);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin-right: 0.5em;
  vertical-align: -0.15em;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Theme toggle button */
.theme-toggle {
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-muted);
  width: 38px;
  height: 38px;
  border-radius: var(--r-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
  cursor: pointer;
}
.theme-toggle:hover { background: var(--bg-subtle); color: var(--text); }
.theme-toggle .fa-sun { display: none; }
[data-theme="dark"] .theme-toggle .fa-sun { display: inline; }
[data-theme="dark"] .theme-toggle .fa-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .fa-sun { display: inline; }
  :root:not([data-theme="light"]) .theme-toggle .fa-moon { display: none; }
}

/* ============================================================
   Footer
   ============================================================ */
footer.bg-dark {
  background: var(--bg-surface) !important;
  color: var(--text-muted) !important;
  border-top: 1px solid var(--border);
  padding: 1.5rem 0 !important;
  margin-top: 3rem;
}
footer.bg-dark .text-danger { color: var(--brand-500) !important; }
footer.bg-dark h5 { color: var(--text); font-size: 1rem; }
footer.bg-dark a,
footer.bg-dark .text-light,
footer.bg-dark a.text-light {
  color: var(--text-muted) !important;
}
footer.bg-dark a:hover,
footer.bg-dark a.text-light:hover {
  color: var(--brand-500) !important;
}

/* ============================================================
   Defensiv: Bootstrap-„light"-Klassen außerhalb dunkler Contexts
   ============================================================ */
/* btn-outline-light: ist designt für dunkle Backgrounds, auf unserer hellen
   Navbar/Layout sonst unsichtbar (weißer Border auf weiß). */
.btn-outline-light {
  color: var(--text);
  border-color: var(--border-strong);
  background: transparent;
}
.btn-outline-light:hover,
.btn-outline-light:focus {
  background: var(--bg-subtle);
  color: var(--text);
  border-color: var(--border-strong);
}

/* Auf farbigen Hintergründen (z.B. inline-gradient Admin-Cards, .bg-danger header)
   sollen Outline-Light-Buttons weiterhin weiß bleiben. */
[style*="gradient"] .btn-outline-light,
.bg-danger .btn-outline-light,
.bg-primary .btn-outline-light,
.bg-success .btn-outline-light,
.bg-info .btn-outline-light,
.bg-warning .btn-outline-light,
.bg-dark   .btn-outline-light,
.hero-section .btn-outline-light {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.7);
  background: transparent;
}
[style*="gradient"] .btn-outline-light:hover,
.bg-danger .btn-outline-light:hover,
.bg-primary .btn-outline-light:hover,
.bg-success .btn-outline-light:hover,
.bg-info .btn-outline-light:hover,
.bg-warning .btn-outline-light:hover,
.bg-dark   .btn-outline-light:hover,
.hero-section .btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  border-color: #fff;
}

/* text-light: ohne dunklen Container nicht sichtbar — fallback auf muted */
.text-light:not(footer *):not([class*="bg-"] *):not([style*="gradient"] *):not(.hero-section *):not(.card-header *):not(.modal-header *) {
  color: var(--text-muted) !important;
}

/* text-white auf farbigen Cards ist OK; auf neutralen Cards (kein Inline-Gradient,
   keine farbige bg-Klasse) muss es lesbar bleiben. */
.card:not([class*="bg-"]):not([style*="gradient"]) .text-white,
.stats-card:not([style*="gradient"]):not([class*="bg-"]) .text-white {
  color: var(--text) !important;
}
.card:not([class*="bg-"]):not([style*="gradient"]) .text-white-50,
.stats-card:not([style*="gradient"]):not([class*="bg-"]) .text-white-50 {
  color: var(--text-muted) !important;
}

/* Cards mit explizit gesetzter farbiger Hintergrundklasse oder inline-gradient:
   Text bleibt weiß, Bordergröße neutral. */
.stats-card[style*="gradient"],
.card[style*="gradient"] {
  border-color: transparent;
  color: #fff;
}
.stats-card[style*="gradient"] .text-muted,
.card[style*="gradient"] .text-muted {
  color: rgba(255, 255, 255, 0.85) !important;
}

/* Card-Header mit bg-Klasse → Text auf Brand bleibt weiß */
.card-header[class*="bg-danger"],
.card-header[class*="bg-primary"],
.card-header[class*="bg-success"],
.card-header[class*="bg-info"],
.card-header[class*="bg-warning"],
.card-header[class*="bg-dark"] {
  border-bottom: none;
}
.card-header.bg-warning { color: #1a1d21; }

/* ============================================================
   Utility overrides for contrast
   ============================================================ */
.text-muted { color: var(--text-muted) !important; }
.text-subtle { color: var(--text-subtle) !important; font-size: 0.85rem; }

/* ============================================================
   Glossary Letter-Navigation
   ============================================================ */
.letter-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.letter-nav .btn {
  min-width: 40px;
  padding: 0.3rem 0.5rem;
  font-weight: 600;
}
@media (max-width: 576px) {
  .letter-nav {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
    padding-bottom: 0.25rem;
    margin-left: -0.25rem;
    margin-right: -0.25rem;
    padding-left: 0.25rem;
    padding-right: 0.25rem;
  }
  .letter-nav .btn {
    flex: 0 0 auto;
    scroll-snap-align: start;
  }
}
.letter-nav .btn.disabled { opacity: 0.3; pointer-events: none; }
.text-success { color: var(--success) !important; }
.text-warning { color: var(--accent-500) !important; }
.text-danger  { color: var(--danger) !important; }
.text-info    { color: var(--info) !important; }
.text-primary { color: var(--brand-500) !important; }

.bg-light { background: var(--bg-subtle) !important; }
.bg-white { background: var(--bg-surface) !important; }

/* ============================================================
   Animations
   ============================================================ */
.animate-fade-in { animation: fadeIn var(--dur) var(--ease); }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   Mobile Optimizations
   ============================================================ */
@media (max-width: 768px) {
  .hero-section { padding: 2.5rem 1rem; }
  .quiz-card { padding: 1rem; border-radius: var(--r-lg); }
  .navbar .nav-link { padding: 0.65rem 0.85rem; margin: 2px 0; }
  .btn { min-height: 44px; touch-action: manipulation; }
  .btn-sm { min-height: 36px; }
  .answer-option { min-height: 56px; padding: 1rem; touch-action: manipulation; }
  /* Größerer Touch-Bereich am Label, NICHT an der Checkbox selbst */
  .form-check { padding-block: 0.35rem; }
  .form-check-label { padding-left: 0.25rem; cursor: pointer; min-height: 32px; display: inline-flex; align-items: center; }
  .answer-option .form-check-input { transform: scale(1.15); margin-right: 0.5rem; }
  .form-control, .form-select { font-size: 16px; /* prevent iOS zoom */ }
  .stats-card h3 { font-size: 1.5rem; }
  .card { border-radius: var(--r-md); }
  .dropdown-menu {
    border-radius: var(--r-md);
    box-shadow: var(--sh-md);
  }
}

@media (max-width: 576px) {
  .container, .container-fluid { padding-left: 1rem; padding-right: 1rem; }
  .hero-section { padding: 2rem 1rem; }
  .card-body, .card-header, .card-footer { padding: 0.9rem 1rem; }
  .btn-lg { padding: 0.65rem 1.1rem; }
}

/* Safe areas for notched devices */
@supports (padding: max(0px)) {
  body {
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
  }
}

/* ============================================================
   Modals — Dark-Mode-tauglich machen
   ============================================================ */
.modal-content {
  background: var(--bg-surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
}
.modal-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text);
}
.modal-header.bg-danger,
.modal-header.bg-primary,
.modal-header.bg-success,
.modal-header.bg-info,
.modal-header.bg-warning,
.modal-header.bg-dark {
  border-bottom: none;
}
.modal-footer { border-top: 1px solid var(--border); }
.modal-title { color: inherit; }
.modal-backdrop.show { opacity: 0.5; }
[data-theme="dark"] .modal-backdrop.show { opacity: 0.7; }

/* Close-Button im Dark Mode invertieren */
[data-theme="dark"] .btn-close {
  filter: invert(1) grayscale(1);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .btn-close {
    filter: invert(1) grayscale(1);
  }
}

/* ============================================================
   Tooltips, Popovers — Dark-Mode
   ============================================================ */
.tooltip-inner {
  background: var(--bg-inverse);
  color: var(--bg-surface);
}
.tooltip .tooltip-arrow::before { border-top-color: var(--bg-inverse); }

.popover {
  background: var(--bg-surface);
  border-color: var(--border);
  color: var(--text);
}
.popover-header {
  background: var(--bg-subtle);
  border-bottom-color: var(--border);
  color: var(--text);
}
.popover-body { color: var(--text); }

/* ============================================================
   Alerts im Dark Mode lesbarer (heller Text)
   ============================================================ */
[data-theme="dark"] .alert-success {
  color: #86efac;
  background: rgba(22, 163, 74, 0.15);
  border-color: rgba(22, 163, 74, 0.35);
}
[data-theme="dark"] .alert-warning {
  color: #fcd34d;
  background: rgba(217, 119, 6, 0.15);
  border-color: rgba(217, 119, 6, 0.35);
}
[data-theme="dark"] .alert-danger {
  color: #fca5a5;
  background: rgba(220, 38, 38, 0.15);
  border-color: rgba(220, 38, 38, 0.35);
}
[data-theme="dark"] .alert-info {
  color: #7dd3fc;
  background: rgba(2, 132, 199, 0.15);
  border-color: rgba(2, 132, 199, 0.35);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .alert-success { color: #86efac; background: rgba(22, 163, 74, 0.15); border-color: rgba(22, 163, 74, 0.35); }
  :root:not([data-theme="light"]) .alert-warning { color: #fcd34d; background: rgba(217, 119, 6, 0.15); border-color: rgba(217, 119, 6, 0.35); }
  :root:not([data-theme="light"]) .alert-danger { color: #fca5a5; background: rgba(220, 38, 38, 0.15); border-color: rgba(220, 38, 38, 0.35); }
  :root:not([data-theme="light"]) .alert-info { color: #7dd3fc; background: rgba(2, 132, 199, 0.15); border-color: rgba(2, 132, 199, 0.35); }
}

/* ============================================================
   Form-Switches: Track sichtbar in beiden Modes
   ============================================================ */
.form-switch .form-check-input {
  background-color: var(--bg-muted);
  border-color: var(--border-strong);
}
.form-switch .form-check-input:not(:checked) {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='%235c646d'/%3e%3c/svg%3e");
}
.form-switch .form-check-input:checked {
  background-color: var(--brand-500);
  border-color: var(--brand-500);
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='%23fff'/%3e%3c/svg%3e");
}

/* ============================================================
   Tabellen im Dark Mode + Striped + Hover
   ============================================================ */
.table > :not(caption) > * > * {
  color: var(--text);
  background-color: transparent;
}
.table-striped > tbody > tr:nth-of-type(odd) > * {
  background-color: var(--bg-subtle);
  color: var(--text);
}
.table-hover > tbody > tr:hover > * {
  background-color: var(--bg-muted);
  color: var(--text);
}
/* Zeilen-Highlight-Klassen für aktive/warnende/fehlerhafte Rows.
   !important nötig, weil .table-striped via höherer Spezifität sonst den Background
   wieder überschreibt. Color explizit mit !important, damit Bootstrap-interner
   --bs-table-color den Text nicht auf hell-auf-hell zieht. */
.table > tbody > tr.table-success > * {
  background-color: color-mix(in srgb, var(--success) 15%, var(--bg-surface)) !important;
  color: var(--text) !important;
}
.table > tbody > tr.table-warning > * {
  background-color: color-mix(in srgb, var(--warning) 15%, var(--bg-surface)) !important;
  color: var(--text) !important;
}
.table > tbody > tr.table-danger > * {
  background-color: color-mix(in srgb, var(--danger) 15%, var(--bg-surface)) !important;
  color: var(--text) !important;
}
.table > tbody > tr.table-info > * {
  background-color: color-mix(in srgb, var(--info) 15%, var(--bg-surface)) !important;
  color: var(--text) !important;
}

/* Bootstrap 5.3 legt bei .table-striped einen linear-gradient via --bs-table-bg-type
   über jede Zelle. Bei kombinierten Row-Highlights (z.B. table-danger) würde dieser
   Overlay den farbigen Hintergrund überschreiben. Wir neutralisieren den Overlay. */
.table-striped > tbody > tr.table-success > *,
.table-striped > tbody > tr.table-warning > *,
.table-striped > tbody > tr.table-danger > *,
.table-striped > tbody > tr.table-info > * {
  --bs-table-bg-type: transparent;
  --bs-table-color-type: inherit;
}

/* ============================================================
   List-Group Dark-Mode
   ============================================================ */
.list-group-item {
  background: var(--bg-surface);
  border-color: var(--border);
  color: var(--text);
}
.list-group-item-action:hover,
.list-group-item-action:focus {
  background: var(--bg-subtle);
  color: var(--text);
}

/* ============================================================
   Bootstrap-Badges mit text-dark Override für Kontrast in Dark
   ============================================================ */
.badge.text-dark {
  color: #1a1d21 !important;
}

/* Count-Badges INNERHALB von Buttons — robust gegen jeden Button-Stil.
   Nutzt currentColor, sodass der Badge immer auf dem Button-Text-Kontrast sitzt. */
.btn .badge {
  background-color: rgba(0, 0, 0, 0.18) !important;
  color: inherit !important;
  font-weight: 700;
  border: 0;
}
/* Auf Outline-Buttons (hell/transparent) brauchen wir einen sichtbaren Chip */
.btn-outline-primary .badge,
.btn-outline-secondary .badge,
.btn-outline-danger .badge,
.btn-outline-warning .badge,
.btn-outline-success .badge,
.btn-outline-info .badge,
.btn-outline-light .badge {
  background-color: var(--bg-muted) !important;
  color: var(--text) !important;
}

/* ============================================================
   Disabled-Inputs sichtbar
   ============================================================ */
.form-control:disabled,
.form-control[readonly],
.form-select:disabled {
  background-color: var(--bg-subtle);
  color: var(--text-muted);
  opacity: 1;
}

/* ============================================================
   Theme-Toggle Sun-Icon-Color in Light & Dark
   ============================================================ */
.theme-toggle .fa-moon { color: var(--text-muted); }
.theme-toggle .fa-sun  { color: var(--accent-warm); }
.theme-toggle:hover .fa-moon,
.theme-toggle:hover .fa-sun { filter: brightness(1.1); }

/* ============================================================
   Active Nav-Link Underline-Akzent (war vorher entfernt)
   ============================================================ */
.navbar .nav-link.active {
  position: relative;
}

/* ============================================================
   Login/Register/Identity-Pages — generelles Identity-CSS
   (die Pages sind scaffolded und nutzen Bootstrap-Defaults)
   ============================================================ */
.floating-label > label,
.form-floating > label {
  color: var(--text-muted);
}
.form-floating > .form-control:focus ~ label,
.form-floating > .form-control:not(:placeholder-shown) ~ label,
.form-floating > .form-select ~ label {
  color: var(--text-muted);
}

/* Bootstrap-Kleinkram für Dark Mode */
hr { border-top-color: var(--border); opacity: 1; }
.border, .border-top, .border-bottom, .border-start, .border-end { border-color: var(--border) !important; }

/* ============================================================
   Accessibility: reduced motion / high contrast
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-contrast: more) {
  .btn, .card, .answer-option, .form-control { border-width: 2px; }
  .answer-option.selected { border-width: 3px; }
}