/* ==========================================================================
   SBF-Binnen Trainer - Stylesheet
   ==========================================================================
   Design-Idee: ein ruhiges, "seekarten"-artiges Erscheinungsbild.
   Marineblau als Leitfarbe, gedämpftes Bernstein/Gold als Akzent, und die
   klassischen Navigationslicht-Farben Gruen (Steuerbord/richtig) und
   Rot (Backbord/falsch) fuer das Antwort-Feedback.
   Mobile-First: alle Basisregeln gelten fuer schmale Bildschirme, groessere
   Layouts werden ueber min-width media queries ergaenzt.
   ========================================================================== */

:root {
  /* Farben */
  --color-bg: #f4f7f8;
  --color-surface: #ffffff;
  --color-surface-alt: #eef3f5;
  --color-ink: #14313d;
  --color-ink-muted: #55707b;
  --color-primary: #0e4f66;
  --color-primary-dark: #093142;
  --color-accent: #d98e2b;
  --color-accent-ink: #5c3d0f;
  --color-success: #1e7a46;
  --color-success-bg: #e5f3ea;
  --color-danger: #b23a2e;
  --color-danger-bg: #fbeae8;
  --color-border: #d8e2e6;

  /* Typografie */
  --font-display: Georgia, "Iowan Old Style", "Palatino Linotype", "Times New Roman", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;

  /* Layout */
  --container-width: 640px;
  --radius: 10px;
  --radius-lg: 16px;
  --nav-height: 64px;
  --topbar-height: 56px;
  --shadow-sm: 0 1px 3px rgba(20, 49, 61, 0.08);
  --shadow-md: 0 4px 16px rgba(20, 49, 61, 0.12);
}

/* -------------------------------------------------------------------------
   Reset & Grundlagen
   ------------------------------------------------------------------------- */

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-ink);
  line-height: 1.5;
  font-size: 16px;
  min-height: 100vh;
  padding-bottom: calc(var(--nav-height) + 12px);
}

h1, h2, h3 {
  font-family: var(--font-display);
  color: var(--color-primary-dark);
  line-height: 1.2;
  margin: 0 0 0.5rem;
}

h1 { font-size: 1.6rem; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.05rem; }

p { margin: 0 0 0.75rem; }

a { color: var(--color-primary); }

.text-muted { color: var(--color-ink-muted); }

ul.plain { list-style: none; margin: 0; padding: 0; }

/* Sichtbarer Fokus-Ring fuer Tastaturbedienung (Desktop) */
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* Kleine Wellenlinie als wiederkehrendes, thematisches Trennelement */
.wave-divider {
  width: 100%;
  height: 10px;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 120 10' preserveAspectRatio='none'><path d='M0 5 Q 15 0 30 5 T 60 5 T 90 5 T 120 5' fill='none' stroke='%230e4f66' stroke-opacity='0.25' stroke-width='2'/></svg>");
  background-repeat: repeat-x;
  background-size: 120px 10px;
  margin: 0.25rem 0 1rem;
}

/* -------------------------------------------------------------------------
   App-Grundgeruest: Topbar, Container, Bottom-Navigation
   ------------------------------------------------------------------------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  height: var(--topbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1rem;
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.topbar__brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: #fff;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.topbar__brand svg { flex-shrink: 0; }

.topbar__user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
}

.topbar form { margin: 0; }

.btn-logout {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #fff;
  border-radius: var(--radius);
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
  cursor: pointer;
}

.btn-logout:hover { background: rgba(255, 255, 255, 0.22); }

main.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 1.1rem 1rem 2rem;
}

/* Bottom-Navigation (mobil): grosse, gut treffbare Kacheln ohne JavaScript */
.bottom-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 20;
  display: flex;
  height: var(--nav-height);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -2px 10px rgba(20, 49, 61, 0.08);
}

.bottom-nav a {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  text-decoration: none;
  color: var(--color-ink-muted);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.bottom-nav a svg { width: 22px; height: 22px; }

.bottom-nav a.active { color: var(--color-primary); }
.bottom-nav a.active svg { stroke: var(--color-primary); }

/* -------------------------------------------------------------------------
   Karten / Container-Elemente
   ------------------------------------------------------------------------- */

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.1rem 1.1rem 1.2rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1rem;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin-bottom: 0.35rem;
  display: block;
}

/* -------------------------------------------------------------------------
   Buttons & Formulare
   ------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  padding: 0.85rem 1.1rem;
  min-height: 52px;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.05s ease, background-color 0.15s ease;
  width: 100%;
}

.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover { background: var(--color-primary-dark); }

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-secondary:hover { background: var(--color-surface-alt); }

.btn-accent {
  background: #fff;
  color: var(--color-accent-ink);
  border-color: var(--color-accent);
}
.btn-accent[aria-pressed="true"] {
  background: var(--color-accent);
  color: #fff;
}

.btn-block { display: flex; }
.btn-small {
  min-height: 44px;
  width: auto;
  padding: 0.6rem 0.9rem;
  font-size: 0.9rem;
}

.btn-full-width-group {
  display: flex;
  gap: 0.6rem;
  align-items: stretch;
}
.btn-full-width-group .btn-primary { flex: 1; }

.field {
  margin-bottom: 1rem;
}
.field label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.35rem;
  font-size: 0.92rem;
}
.field input[type="text"],
.field input[type="password"],
.field input[type="number"] {
  width: 100%;
  font-size: 1rem;
  padding: 0.75rem 0.85rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-ink);
}
.field input:focus { border-color: var(--color-primary); }

.form-error {
  background: var(--color-danger-bg);
  color: var(--color-danger);
  border: 1px solid var(--color-danger);
  border-radius: var(--radius);
  padding: 0.7rem 0.9rem;
  margin-bottom: 1rem;
  font-size: 0.92rem;
}

.form-hint {
  background: var(--color-surface-alt);
  border-radius: var(--radius);
  padding: 0.7rem 0.9rem;
  margin-bottom: 1rem;
  font-size: 0.88rem;
  color: var(--color-ink-muted);
}

/* Kategorie-Auswahl (Radio-Kacheln) */
.choice-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.6rem;
  margin-bottom: 1.1rem;
}
.choice-tile {
  position: relative;
}
.choice-tile input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}
.choice-tile label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  cursor: pointer;
  background: var(--color-surface);
  font-weight: 600;
}
.choice-tile input:checked + label {
  border-color: var(--color-primary);
  background: var(--color-surface-alt);
  color: var(--color-primary-dark);
}
.choice-tile input:focus-visible + label {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}
.choice-tile .count {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-ink-muted);
  font-weight: 400;
}

/* -------------------------------------------------------------------------
   Fragenanzeige
   ------------------------------------------------------------------------- */

.question-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
  font-size: 0.8rem;
  color: var(--color-ink-muted);
}
.question-number {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-primary);
}

.question-text {
  font-size: 1.12rem;
  font-weight: 600;
  color: var(--color-ink);
  margin: 0.2rem 0 0.9rem;
}

.question-images {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 1rem;
}
.question-images img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: #fff;
}

.answer-form {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.answer-btn {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  text-align: left;
  width: 100%;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  font-size: 1rem;
  font-family: var(--font-body);
  color: var(--color-ink);
  cursor: pointer;
}
.answer-btn:hover { border-color: var(--color-primary); background: var(--color-surface-alt); }

.answer-btn__letter {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.progress-note {
  font-size: 0.82rem;
  color: var(--color-ink-muted);
  margin-top: 0.9rem;
  text-align: center;
}

/* Fortschrittsbalken (Pruefungsmodus) */
.exam-progress {
  height: 6px;
  border-radius: 3px;
  background: var(--color-surface-alt);
  margin-bottom: 0.9rem;
  overflow: hidden;
}
.exam-progress__fill {
  height: 100%;
  background: var(--color-accent);
}

/* -------------------------------------------------------------------------
   Ergebnis-/Feedback-Anzeige (Navigationslicht-Metapher: gruen = richtig
   [Steuerbord], rot = falsch [Backbord])
   ------------------------------------------------------------------------- */

.feedback-banner {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  margin-bottom: 1rem;
  font-weight: 700;
  font-size: 1.05rem;
}
.feedback-banner.is-correct {
  background: var(--color-success-bg);
  color: var(--color-success);
  border: 1.5px solid var(--color-success);
}
.feedback-banner.is-wrong {
  background: var(--color-danger-bg);
  color: var(--color-danger);
  border: 1.5px solid var(--color-danger);
}

.answer-review {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  border-radius: var(--radius);
  padding: 0.8rem 1rem;
  margin-bottom: 0.55rem;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
}
.answer-review.is-correct-answer {
  border-color: var(--color-success);
  background: var(--color-success-bg);
}
.answer-review.is-wrong-selected {
  border-color: var(--color-danger);
  background: var(--color-danger-bg);
}
.answer-review__letter {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-ink-muted);
  color: #fff;
}
.answer-review.is-correct-answer .answer-review__letter { background: var(--color-success); }
.answer-review.is-wrong-selected .answer-review__letter { background: var(--color-danger); }

.answer-review__tag {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin-top: 0.15rem;
}
.answer-review.is-correct-answer .answer-review__tag { color: var(--color-success); }
.answer-review.is-wrong-selected .answer-review__tag { color: var(--color-danger); }

.result-actions {
  display: flex;
  align-items: stretch;
  gap: 0.6rem;
  margin-top: 1.1rem;
}
.result-actions form { margin: 0; flex-shrink: 0; }
.result-actions .btn-primary { flex: 1; }

/* -------------------------------------------------------------------------
   Statistik
   ------------------------------------------------------------------------- */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.7rem;
}
.stat-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.85rem 0.9rem;
}
.stat-item .stat-value {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  display: block;
}
.stat-item .stat-label {
  font-size: 0.8rem;
  color: var(--color-ink-muted);
}

/* -------------------------------------------------------------------------
   Favoriten & Suche
   ------------------------------------------------------------------------- */

.favorite-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.75rem 0.9rem;
  margin-bottom: 0.6rem;
  background: var(--color-surface);
}
.favorite-item__text {
  min-width: 0;
}
.favorite-item__text a {
  font-weight: 600;
  text-decoration: none;
}
.favorite-item__snippet {
  font-size: 0.85rem;
  color: var(--color-ink-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.favorite-item form { margin: 0; }

.empty-state {
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--color-ink-muted);
}
.empty-state svg { margin-bottom: 0.75rem; opacity: 0.6; }

/* -------------------------------------------------------------------------
   Pruefungsergebnis
   ------------------------------------------------------------------------- */

.exam-verdict {
  text-align: center;
  padding: 1.5rem 1rem;
  border-radius: var(--radius-lg);
  margin-bottom: 1.2rem;
}
.exam-verdict.passed {
  background: var(--color-success-bg);
  border: 2px solid var(--color-success);
}
.exam-verdict.failed {
  background: var(--color-danger-bg);
  border: 2px solid var(--color-danger);
}
.exam-verdict .verdict-label {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
}
.exam-verdict.passed .verdict-label { color: var(--color-success); }
.exam-verdict.failed .verdict-label { color: var(--color-danger); }

.exam-category-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--color-border);
}
.exam-category-row:last-child { border-bottom: none; }
.exam-category-row .cat-result {
  font-family: var(--font-mono);
  font-weight: 700;
}
.exam-category-row .cat-result.passed { color: var(--color-success); }
.exam-category-row .cat-result.failed { color: var(--color-danger); }

table.history-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
table.history-table th, table.history-table td {
  text-align: left;
  padding: 0.5rem 0.4rem;
  border-bottom: 1px solid var(--color-border);
}
table.history-table th { color: var(--color-ink-muted); font-weight: 600; font-size: 0.78rem; }

/* -------------------------------------------------------------------------
   Login
   ------------------------------------------------------------------------- */

.login-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}
.login-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 2rem 1.5rem;
  width: 100%;
  max-width: 380px;
}
.login-card__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.4rem;
  text-align: center;
}
.login-card__brand h1 { margin: 0; font-size: 1.35rem; }
.login-card__brand p { margin: 0; font-size: 0.85rem; color: var(--color-ink-muted); }

/* -------------------------------------------------------------------------
   Responsive: Desktop / Tablet
   ------------------------------------------------------------------------- */

@media (min-width: 720px) {
  body { padding-bottom: 2rem; }

  .bottom-nav {
    position: sticky;
    top: var(--topbar-height);
    height: auto;
    border-top: none;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    justify-content: center;
  }
  .bottom-nav a {
    flex: 0 1 120px;
    flex-direction: row;
    padding: 0.85rem 0;
    font-size: 0.82rem;
  }
  .bottom-nav a svg { width: 18px; height: 18px; }

  main.container { padding-top: 1.6rem; }

  .choice-grid { grid-template-columns: 1fr 1fr; }

  .stats-grid { grid-template-columns: repeat(4, 1fr); }

  .btn { width: auto; }
  .btn-block { width: 100%; }
}

/* Barrierefreiheit: reduzierte Bewegung respektieren */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}