/* ════════════════════════════════════════════════════════════
   German Learning Assistant — Shared Stylesheet
   Used by: index.html, data/sentences-html/*.html, data/grammar-html/*.html
   ════════════════════════════════════════════════════════════ */

/* ── RESET & BASE ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: system-ui, Arial, sans-serif;
  font-size: 16px; line-height: 1.65;
  color: #212121; background: #fafafa;
  padding: 24px 16px 64px;
}
.container { max-width: 800px; margin: 0 auto; }

/* ── HEADER ── */
header {
  background: #1a237e; color: #fff;
  border-radius: 10px; padding: 28px 32px; margin-bottom: 24px;
}
header h1 { font-size: 1.7rem; font-weight: 700; margin-bottom: 8px; }
header .focus { font-size: 0.95rem; opacity: 0.85; margin-bottom: 8px; }
header .meta { font-size: 0.82rem; opacity: 0.65; margin-top: 6px; }

/* ── NAV — sentence/index style (pill links) ── */
nav { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 32px; }
nav a {
  background: #e8eaf6; color: #1a237e;
  text-decoration: none; padding: 8px 18px;
  border-radius: 24px; font-weight: 600; font-size: 0.9rem;
}
nav a:hover { background: #c5cae9; }

/* ── NAV — grammar style (block nav) ── */
nav.block-nav {
  display: block;
  background: #fff; border: 1px solid #e0e0e0;
  border-radius: 8px; padding: 12px 16px;
  margin-bottom: 24px;
}
nav.block-nav a {
  background: none; border-radius: 0; padding: 0;
  margin-right: 20px; font-size: 0.92rem;
  color: #1a237e; text-decoration: none; font-weight: 600;
}
nav.block-nav a:hover { text-decoration: underline; background: none; }

/* ── BADGES ── */
.badge, .level-badge {
  display: inline-block; padding: 2px 10px; border-radius: 12px;
  font-size: 0.72rem; font-weight: 700; letter-spacing: .04em;
  text-transform: uppercase; color: #fff; margin-right: 4px;
}
.badge-simple  { background: #2e7d32; }
.badge-medium  { background: #f57c00; }
.badge-complex { background: #c62828; }
.badge-type    { background: #37474f; }
.badge-fill_in_blank   { background: #1565c0; }
.badge-multiple_choice { background: #6a1b9a; }
.badge-translation     { background: #00695c; }
.badge-error_correction { background: #4e342e; }
.section-badge {
  display: inline-block; padding: 2px 12px; border-radius: 12px;
  font-size: 0.75rem; font-weight: 700; letter-spacing: .04em;
  text-transform: uppercase; color: #fff; margin-right: 8px; vertical-align: middle;
}
.badge-grammar   { background: #6a1b9a; }
.badge-sentences { background: #00695c; }

/* ── FOOTER ── */
footer { text-align: center; font-size: 0.8rem; color: #9e9e9e; margin-top: 48px; }

/* ════════════════════
   SENTENCES-SPECIFIC
   ════════════════════ */

/* SECTIONS */
section { margin-bottom: 48px; }
section > h2 {
  font-size: 1.35rem; font-weight: 700; color: #1a237e;
  border-bottom: 3px solid #c5cae9; padding-bottom: 8px; margin-bottom: 20px;
  display: flex; align-items: center; gap: 10px;
}

/* SENTENCE CARDS */
.sentence-card {
  background: #fff; border: 1px solid #e0e0e0;
  border-radius: 8px; padding: 16px 20px; margin-bottom: 12px;
}
.card-header { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.card-num { font-weight: 700; font-size: 1rem; color: #333; }
.sentence-german { font-size: 1.1rem; font-weight: 700; color: #1a237e; margin-bottom: 4px; }
.sentence-english { color: #555; font-size: 0.95rem; margin-bottom: 6px; }
.sentence-note { font-size: 0.85rem; color: #5c6bc0; font-style: italic; }

/* INDEX FILE LIST */
.file-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.file-list li a {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  background: #fff; border: 1px solid #e0e0e0; border-radius: 8px;
  padding: 14px 18px; text-decoration: none; color: #1a237e;
  font-weight: 600; font-size: 1rem;
}
.file-list li a:hover { background: #e8eaf6; border-color: #9fa8da; }
.file-list li a .label { flex: 1; }
.file-list li a .date { font-size: 0.78rem; font-weight: 400; color: #888; white-space: nowrap; }

/* ════════════════════
   GRAMMAR-SPECIFIC
   ════════════════════ */

/* GRAMMAR SECTIONS */
.grammar-page section {
  background: #fff; border: 1px solid #e0e0e0;
  border-radius: 8px; padding: 24px; margin-bottom: 24px;
}
.grammar-page section h2 {
  font-size: 1.25rem; color: #1a237e;
  border-bottom: 2px solid #e8eaf6; padding-bottom: 10px; margin-bottom: 16px;
  display: block;
}
.grammar-page section h3 { font-size: 1.05rem; color: #37474f; margin: 20px 0 8px; }
p { margin-bottom: 12px; }
strong { color: #1a237e; }

table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 0.92rem; }
th { background: #e8eaf6; color: #1a237e; text-align: left; padding: 8px 10px; border: 1px solid #c5cae9; }
td { padding: 7px 10px; border: 1px solid #e0e0e0; }
tr:nth-child(even) td { background: #f5f5f5; }

.example-group { margin-bottom: 20px; }
.example-group h3 { font-size: 1rem; font-weight: 700; margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
.example-item { margin-bottom: 14px; padding: 12px 14px; border-left: 4px solid #e0e0e0; background: #fafafa; border-radius: 0 6px 6px 0; }
.example-item.simple { border-left-color: #2e7d32; }
.example-item.medium { border-left-color: #f57c00; }
.example-item.complex { border-left-color: #c62828; }
.example-german { font-size: 1.05rem; font-weight: 700; color: #1a237e; margin-bottom: 3px; }
.example-english { color: #555; margin-bottom: 4px; }
.example-english::before { content: "→ "; color: #999; }
.example-note { font-size: 0.82rem; color: #777; font-style: italic; }
.example-note::before { content: "Note: "; font-style: normal; font-weight: 600; color: #1565c0; }

.exercise-item { margin-bottom: 16px; padding: 14px 16px; background: #f5f5f5; border-radius: 8px; }
.exercise-header { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; flex-wrap: wrap; }
.exercise-num { font-weight: 700; color: #37474f; }
.exercise-prompt { font-size: 1rem; margin-top: 4px; }
.exercise-options { margin-top: 8px; list-style: none; }
.exercise-options li { margin: 3px 0; color: #37474f; padding-left: 6px; }

.solutions-section { background: #fffde7; border: 1px solid #f9a825; }
.solutions-section h2 { color: #e65100; border-bottom-color: #ffe082; }
.solution-item { margin-bottom: 14px; padding: 12px 14px; background: white; border-radius: 6px; border: 1px solid #ffe082; }
.solution-answer { font-weight: 700; color: #1b5e20; margin-bottom: 4px; }
.solution-answer::before { content: "Answer: "; color: #37474f; font-weight: 400; }
.solution-explanation { font-size: 0.88rem; color: #555; }

.transfer-notes { background: #e8f5e9; border: 1px solid #a5d6a7; border-radius: 8px; padding: 18px 20px; margin-bottom: 20px; }
.transfer-notes h3 { color: #2e7d32; margin-bottom: 10px; }
.transfer-notes ul { padding-left: 18px; }
.transfer-notes li { margin-bottom: 8px; font-size: 0.92rem; }

.key-takeaway { background: #e3f2fd; border: 1px solid #90caf9; border-radius: 8px; padding: 16px 20px; }
.key-takeaway h3 { color: #0d47a1; margin-bottom: 8px; }
.key-takeaway p { color: #1565c0; font-weight: 600; margin: 0; }

code { background: #e8eaf6; padding: 1px 6px; border-radius: 4px; font-family: monospace; font-size: 0.9em; color: #1a237e; }

/* GENDER GRID — der_die_das page */
.gender-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; margin-top: 12px; }
@media (max-width: 600px) { .gender-grid { grid-template-columns: 1fr; } }
.gender-box { border-radius: 8px; padding: 14px 16px; }
.gender-box.masc { background: #e3f2fd; border-left: 4px solid #1565c0; }
.gender-box.fem  { background: #fce4ec; border-left: 4px solid #c62828; }
.gender-box.neut { background: #e8f5e9; border-left: 4px solid #2e7d32; }
.gender-box h4 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.gender-box.masc h4 { color: #0d47a1; }
.gender-box.fem  h4 { color: #b71c1c; }
.gender-box.neut h4 { color: #1b5e20; }
.gender-box ul { list-style: none; font-size: 0.85rem; }
.gender-box ul li { padding: 2px 0; border-bottom: 1px solid rgba(0,0,0,0.06); }
.gender-box ul li:last-child { border: none; }
.noun-en { color: #757575; font-size: 0.8rem; }

/* PATTERN TAGS — der_die_das page */
.pattern-tag { display: inline-block; font-size: 0.72rem; font-weight: 700; padding: 1px 7px; border-radius: 10px; margin-left: 4px; vertical-align: middle; }
.ptag-m { background: #bbdefb; color: #0d47a1; }
.ptag-f { background: #fce4ec; color: #b71c1c; }
.ptag-n { background: #c8e6c9; color: #1b5e20; }

/* CHANGED ENDING HIGHLIGHT — nominativ_akkusativ_dativ page */
.changed { color: #c62828; font-weight: 700; }

/* VOCAB DRILL — verb conjugation card */
.verb-card { background: #fff; border: 1px solid #e0e0e0; border-radius: 8px; padding: 16px 20px; margin-bottom: 16px; }
.verb-card h4 { font-size: 1.05rem; font-weight: 700; color: #1a237e; margin-bottom: 10px; }
.conj-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; margin-bottom: 8px; }
.conj-table td { padding: 5px 10px; border: 1px solid #e0e0e0; }
.conj-table td:first-child { color: #757575; width: 40%; }
.conj-table tr.perfekt-row td { background: #e8f5e9; font-weight: 700; color: #1b5e20; }

/* VOCAB DRILL — adjective / other reference cards */
.vocab-card { background: #fff; border: 1px solid #e0e0e0; border-radius: 8px; padding: 12px 16px; margin-bottom: 10px; display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.vocab-card .vc-german { font-size: 1.05rem; font-weight: 700; color: #1a237e; }
.vocab-card .vc-english { color: #555; font-size: 0.9rem; }
.vocab-card .vc-note { color: #777; font-size: 0.82rem; font-style: italic; }
.vocab-card .vc-antonym { color: #c62828; font-size: 0.82rem; }

/* VOCAB DRILL — word subtype badges */
.badge-adverb       { background: #0277bd; }
.badge-preposition  { background: #6a1b9a; }
.badge-pronoun      { background: #00695c; }
.badge-conjunction  { background: #4e342e; }
.badge-interjection { background: #ad1457; }
.badge-phrase       { background: #37474f; }
.badge-vocabulary   { background: #1565c0; }

/* ════════════════════
   DARK MODE
   ════════════════════ */
@media (prefers-color-scheme: dark) {
  /* Base */
  body { background: #121212; color: #e0e0e0; }

  /* Nav */
  nav a { background: #283593; color: #c5cae9; }
  nav a:hover { background: #3949ab; }
  nav.block-nav { background: #1e1e1e; border-color: #333; }
  nav.block-nav a { color: #9fa8da; }

  /* Sentences */
  section > h2 { color: #7986cb; border-bottom-color: #3949ab; }
  .sentence-card { background: #1e1e1e; border-color: #333; }
  .card-num { color: #bdbdbd; }
  .sentence-german { color: #7986cb; }
  .sentence-english { color: #9e9e9e; }
  .sentence-note { color: #7986cb; }

  /* Index file list */
  .file-list li a { background: #1e1e1e; border-color: #333; color: #9fa8da; }
  .file-list li a:hover { background: #283593; border-color: #5c6bc0; }
  .file-list li a .date { color: #757575; }

  /* Grammar sections */
  .grammar-page section { background: #1e1e1e; border-color: #333; }
  .grammar-page section h2 { color: #7986cb; border-bottom-color: #3949ab; }
  .grammar-page section h3 { color: #90a4ae; }
  p { color: #e0e0e0; }
  strong { color: #9fa8da; }
  th { background: #283593; color: #c5cae9; border-color: #3949ab; }
  td { border-color: #333; }
  tr:nth-child(even) td { background: #252525; }
  .example-item { background: #262626; }
  .example-german { color: #7986cb; }
  .example-english { color: #9e9e9e; }
  .example-note { color: #aaa; }
  .exercise-item { background: #262626; }
  .exercise-num { color: #90a4ae; }
  .exercise-options li { color: #bdbdbd; }
  .solutions-section { background: #1a1400; border-color: #5d4037; }
  .solutions-section h2 { color: #ffb74d; border-bottom-color: #5d4037; }
  .solution-item { background: #1e1e1e; border-color: #5d4037; }
  .solution-answer { color: #81c784; }
  .solution-explanation { color: #9e9e9e; }
  .transfer-notes { background: #0a1f0d; border-color: #1b5e20; }
  .transfer-notes h3 { color: #81c784; }
  .key-takeaway { background: #0a1929; border-color: #0d47a1; }
  .key-takeaway h3 { color: #64b5f6; }
  .key-takeaway p { color: #90caf9; }
  code { background: #283593; color: #c5cae9; }
  footer { color: #616161; }

  /* Gender boxes */
  .gender-box.masc { background: #0d1f36; border-left-color: #1565c0; }
  .gender-box.fem  { background: #2a0e18; border-left-color: #c62828; }
  .gender-box.neut { background: #0a1f0d; border-left-color: #2e7d32; }
  .gender-box.masc h4 { color: #90caf9; }
  .gender-box.fem  h4 { color: #ef9a9a; }
  .gender-box.neut h4 { color: #a5d6a7; }
  .gender-box ul li { border-bottom-color: rgba(255,255,255,0.07); }
  .noun-en { color: #9e9e9e; }
  .ptag-m { background: #1a237e; color: #90caf9; }
  .ptag-f { background: #4a0e16; color: #ef9a9a; }
  .ptag-n { background: #1b5e20; color: #a5d6a7; }

  /* Changed ending highlight */
  .changed { color: #ff6b6b; }

  /* Vocab drill — verb cards */
  .verb-card { background: #1e1e1e; border-color: #333; }
  .verb-card h4 { color: #7986cb; }
  .conj-table td { border-color: #333; }
  .conj-table td:first-child { color: #9e9e9e; }
  .conj-table tr.perfekt-row td { background: #0a1f0d; color: #a5d6a7; }

  /* Vocab drill — vocab cards */
  .vocab-card { background: #1e1e1e; border-color: #333; }
  .vocab-card .vc-german { color: #7986cb; }
  .vocab-card .vc-english { color: #9e9e9e; }
  .vocab-card .vc-note { color: #aaa; }
  .vocab-card .vc-antonym { color: #ff6b6b; }
}