/* ===== IELTS 学習ログ 共通スタイルシート ===== */

:root {
  --bg: #0f1419;
  --panel: #1a2030;
  --panel-2: #232b3d;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #3b82f6;
  --accent-2: #10b981;
  --accent-3: #f59e0b;
  --good: #10b981;
  --bad: #ef4444;
  --ng-color: #f59e0b;
  --border: #30363d;
  --code-bg: #0d1117;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, "Hiragino Sans", "Noto Sans JP", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
}

a { color: var(--accent); }
hr { border: none; border-top: 1px solid var(--border); margin: 24px 0; }
strong { color: #fff; }
ul, ol { padding-left: 22px; }
li { margin: 4px 0; }

/* ── Header (base) ── */
header {
  padding: 28px 24px;
  border-bottom: 4px solid var(--accent);
}
header h1 { font-size: 22px; color: #fff; margin-bottom: 10px; }
.meta { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; font-size: 13px; }
.badge {
  background: rgba(0,0,0,0.35); padding: 4px 12px; border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.25); color: #fff;
}
.badge-phase { background: rgba(16,185,129,0.25); border-color: var(--good); color: var(--good); }
.badge-type  { background: rgba(59,130,246,0.25); border-color: var(--accent); color: #93c5fd; }

/* ── Type-specific header gradients ── */
.header-reading  { background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%); border-color: #3b82f6; }
.header-vocab    { background: linear-gradient(135deg, #4c1d95 0%, #8b5cf6 100%); border-color: #8b5cf6; }
.header-writing1 { background: linear-gradient(135deg, #7c2d12 0%, #f97316 100%); border-color: #f97316; }
.header-writing2 { background: linear-gradient(135deg, #7f1d1d 0%, #ef4444 100%); border-color: #ef4444; }
.header-speaking { background: linear-gradient(135deg, #064e3b 0%, #10b981 100%); border-color: #10b981; }
.header-listening{ background: linear-gradient(135deg, #164e63 0%, #06b6d4 100%); border-color: #06b6d4; }
.header-review   { background: linear-gradient(135deg, #78350f 0%, #f59e0b 100%); border-color: #f59e0b; }

/* ── Layout ── */
.layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 24px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px;
}
nav.toc {
  position: sticky; top: 24px; height: max-content;
  background: var(--panel); border-radius: 8px; padding: 16px;
  border: 1px solid var(--border); font-size: 13px;
}
nav.toc h3 { color: var(--muted); text-transform: uppercase; letter-spacing: 1px; font-size: 11px; margin-bottom: 12px; }
nav.toc a {
  display: block; padding: 6px 10px; color: var(--text);
  text-decoration: none; border-radius: 4px; border-left: 2px solid transparent;
}
nav.toc a:hover { background: var(--panel-2); border-left-color: var(--accent); }
main { min-width: 0; }

/* ── Section ── */
section {
  background: var(--panel); border-radius: 8px; padding: 24px;
  margin-bottom: 20px; border: 1px solid var(--border);
}
section h2 {
  color: var(--accent); font-size: 19px; margin-bottom: 16px;
  border-bottom: 2px solid var(--border); padding-bottom: 8px;
}
section h3 { color: var(--accent-3); font-size: 15px; margin: 20px 0 10px; }
section h4 { color: var(--muted); font-size: 13px; margin: 14px 0 6px; text-transform: uppercase; letter-spacing: 0.5px; }
section p { margin: 10px 0; font-size: 14px; }

/* ── Table ── */
table {
  width: 100%; border-collapse: collapse; margin: 12px 0;
  background: var(--code-bg); border-radius: 6px; overflow: hidden;
  font-size: 14px;
}
th, td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--border); }
th { background: var(--panel-2); color: var(--accent-3); font-weight: 600; }
tr:last-child td { border-bottom: none; }
td strong { color: var(--accent-2); }

/* ── Info / Warn boxes ── */
.info-box {
  background: rgba(59,130,246,0.08); border-left: 3px solid var(--accent);
  padding: 12px 16px; border-radius: 4px; margin: 12px 0; font-size: 14px;
}
.warn-box {
  background: rgba(245,158,11,0.08); border-left: 3px solid var(--accent-3);
  padding: 12px 16px; border-radius: 4px; margin: 12px 0; font-size: 14px;
}

/* ── Strategy SVG ── */
.svg-wrap {
  background: var(--code-bg); border-radius: 8px; padding: 20px;
  margin: 16px 0; overflow-x: auto; border: 1px solid var(--border);
  text-align: center;
}

/* ── Timer badge ── */
.timer-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(245,158,11,0.1); border: 1px solid var(--accent-3);
  padding: 8px 18px; border-radius: 8px; color: var(--accent-3);
  font-weight: 700; font-size: 14px; margin-bottom: 16px;
}

/* ── Passage ── */
.passage-container {
  background: var(--code-bg); border-radius: 6px; padding: 20px;
  max-height: 460px; overflow-y: auto;
  border: 1px solid var(--border); line-height: 1.85; font-size: 14px;
}
.passage-container::-webkit-scrollbar { width: 6px; }
.passage-container::-webkit-scrollbar-track { background: var(--border); }
.passage-container::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 3px; }
.para-block { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 18px; }
.para-label {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--accent); color: white; font-weight: 700;
  width: 28px; height: 28px; border-radius: 50%; font-size: 13px; flex-shrink: 0; margin-top: 2px;
}
.para-text { flex: 1; }
.passage-hint { font-size: 12px; color: var(--muted); text-align: right; margin-top: 4px; }

/* ── T/F/NG questions ── */
.question-block {
  background: var(--panel-2); border-radius: 8px; padding: 16px;
  margin-bottom: 12px; border: 1px solid var(--border); transition: border-color 0.25s;
}
.question-header { display: flex; align-items: baseline; gap: 10px; margin-bottom: 8px; }
.q-num {
  background: var(--accent); color: white; font-weight: 700;
  padding: 2px 9px; border-radius: 4px; font-size: 13px; flex-shrink: 0;
}
.question-text { font-size: 15px; font-style: italic; color: var(--text); }
.tfng-buttons { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.tfng-btn {
  padding: 7px 16px; border: 1.5px solid var(--border); border-radius: 6px;
  cursor: pointer; background: var(--code-bg); color: var(--text);
  font-size: 13px; font-weight: 700; transition: all 0.18s;
}
.tfng-btn:hover { border-color: var(--accent); color: var(--accent); }
.tfng-btn.sel-true  { background: var(--good); border-color: var(--good); color: white; }
.tfng-btn.sel-false { background: var(--bad);  border-color: var(--bad);  color: white; }
.tfng-btn.sel-ng    { background: var(--ng-color); border-color: var(--ng-color); color: #000; }

/* ── MC questions ── */
.mc-options { display: flex; flex-direction: column; gap: 6px; margin-top: 10px; }
.mc-option {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 10px 14px; border: 1.5px solid var(--border); border-radius: 6px;
  cursor: pointer; background: var(--code-bg); margin: 0;
  transition: all 0.18s; font-size: 14px;
}
.mc-option:hover { border-color: var(--accent); }
.mc-option.sel-mc { border-color: var(--accent); background: rgba(59,130,246,0.12); }
.mc-label {
  background: var(--panel-2); color: var(--text); font-weight: 700;
  width: 26px; height: 26px; border-radius: 50%; text-align: center;
  line-height: 26px; font-size: 13px; flex-shrink: 0;
}
.mc-option.sel-mc .mc-label { background: var(--accent); color: white; }

/* ── After submit ── */
.question-block.q-correct { border-color: var(--good); }
.question-block.q-wrong   { border-color: var(--bad);  }
.mc-option.opt-correct { border-color: var(--good); background: rgba(16,185,129,0.1); }
.mc-option.opt-correct .mc-label { background: var(--good); color: white; }
.mc-option.opt-wrong   { border-color: var(--bad);  background: rgba(239,68,68,0.1);  }
.mc-option.opt-wrong .mc-label   { background: var(--bad);  color: white; }
.q-feedback {
  display: none; margin-top: 10px; padding: 8px 14px; border-radius: 6px;
  font-size: 13px; font-weight: 600;
}
.q-feedback.fb-correct { display: flex; align-items: center; gap: 6px; color: var(--good); background: rgba(16,185,129,0.1); }
.q-feedback.fb-wrong   { display: flex; align-items: center; gap: 6px; color: var(--bad);  background: rgba(239,68,68,0.1);  }

/* ── Submit ── */
.submit-btn {
  width: 100%; padding: 14px; margin-top: 16px;
  background: linear-gradient(135deg, #1d4ed8, #3b82f6);
  color: white; border: none; border-radius: 8px;
  font-size: 16px; font-weight: 700; cursor: pointer;
  transition: opacity 0.2s;
}
.submit-btn:hover { opacity: 0.9; }
.submit-btn:disabled { opacity: 0.45; cursor: default; }

/* ── Score panel ── */
.score-panel {
  display: none; background: linear-gradient(135deg, rgba(30,58,138,0.3), rgba(16,185,129,0.2));
  border: 1px solid var(--accent); border-radius: 12px; padding: 28px;
  text-align: center; margin-bottom: 20px;
}
.score-panel.visible { display: block; }
.score-big { font-size: 72px; font-weight: 900; color: var(--accent-2); line-height: 1; }
.score-sub { font-size: 14px; color: var(--muted); margin-top: 4px; }
.score-bar-wrap { background: var(--border); border-radius: 8px; height: 12px; margin: 18px 0; overflow: hidden; }
.score-bar-fill {
  height: 100%; border-radius: 8px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  width: 0%; transition: width 1.2s ease;
}
.band-estimate {
  display: inline-block; background: var(--panel-2);
  border: 1px solid var(--accent-3); padding: 6px 20px; border-radius: 20px;
  color: var(--accent-3); font-weight: 700; margin-top: 6px; font-size: 15px;
}

/* ── Explanations ── */
.exp-item {
  background: var(--panel-2); border-radius: 8px; margin-bottom: 8px; overflow: hidden;
}
.exp-item summary {
  padding: 12px 16px; cursor: pointer; font-weight: 600;
  user-select: none; display: flex; align-items: center; gap: 10px; list-style: none;
}
.exp-item summary::-webkit-details-marker { display: none; }
.exp-item[open] summary { border-bottom: 1px solid var(--border); }
.exp-body { padding: 16px; font-size: 14px; }
.answer-tag {
  display: inline-block; padding: 3px 10px; border-radius: 4px;
  font-size: 12px; font-weight: 700; color: white; flex-shrink: 0;
}
.tag-true { background: var(--good); }
.tag-false { background: var(--bad); }
.tag-ng { background: var(--ng-color); color: #000; }
.tag-mc { background: var(--accent); }
.evidence {
  background: var(--code-bg); border-left: 3px solid var(--accent-3);
  padding: 10px 14px; border-radius: 4px; font-size: 13px;
  margin: 10px 0; font-style: italic; color: #cbd5e1;
}
mark { background: rgba(245,158,11,0.25); color: var(--accent-3); padding: 1px 3px; border-radius: 2px; }
.exp-body p { margin: 8px 0; }

/* ── Vocab flashcards ── */
.vocab-hint { font-size: 12px; color: var(--muted); margin-bottom: 12px; }
.vocab-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 12px; margin: 8px 0;
}
.vocab-card {
  background: var(--code-bg); border: 1.5px solid var(--border);
  border-radius: 8px; padding: 16px; cursor: pointer;
  transition: all 0.2s; text-align: center; min-height: 110px;
  display: flex; flex-direction: column; justify-content: center; gap: 6px;
}
.vocab-card:hover { border-color: var(--accent-2); transform: translateY(-2px); }
.vocab-card.flipped { border-color: var(--accent-2); background: rgba(16,185,129,0.07); }
.vocab-word { font-weight: 700; font-size: 15px; color: var(--accent-2); }
.vocab-pos { font-size: 11px; color: var(--muted); }
.vocab-meaning { font-size: 13px; color: var(--text); display: none; }
.vocab-example { font-size: 11px; color: var(--accent-3); font-style: italic; display: none; }
.vocab-card.flipped .vocab-meaning { display: block; }
.vocab-card.flipped .vocab-example { display: block; }
.flip-icon { font-size: 18px; color: var(--muted); }
.vocab-card.flipped .flip-icon { display: none; }

/* ── Technique steps ── */
.step {
  background: var(--code-bg); border-left: 3px solid var(--accent);
  padding: 14px 16px; margin: 10px 0; border-radius: 4px; font-size: 14px;
}
.step-num {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--accent); color: white;
  width: 28px; height: 28px; border-radius: 50%;
  font-weight: bold; margin-right: 10px; font-size: 13px; flex-shrink: 0;
}
.code-inline {
  background: var(--panel-2); padding: 1px 7px; border-radius: 3px;
  font-family: monospace; font-size: 13px; color: #c4b5fd;
}

/* ── Common mistakes ── */
.mistake-bad  { color: var(--bad);  }
.mistake-why  { color: var(--muted); font-size: 13px; }
.mistake-good { color: var(--good); }

/* ── Self-eval ── */
.self-eval { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.self-eval label {
  background: var(--panel-2); padding: 9px 16px; border-radius: 20px;
  cursor: pointer; display: inline-flex; gap: 8px; align-items: center;
  font-size: 14px;
}
.self-eval input { accent-color: var(--accent); }
.score-input-row { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.score-input-row input[type=number] {
  width: 70px; background: var(--code-bg); color: var(--text);
  border: 1px solid var(--border); border-radius: 4px;
  padding: 6px 10px; font-size: 15px; text-align: center;
}
textarea {
  width: 100%; min-height: 80px; background: var(--code-bg); color: var(--text);
  border: 1px solid var(--border); border-radius: 4px;
  padding: 10px; font-family: inherit; font-size: 14px; resize: vertical;
}
.controls { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
button.action {
  background: var(--accent-2); color: #000; border: none;
  padding: 9px 18px; border-radius: 4px; cursor: pointer; font-weight: 700; font-size: 14px;
}
button.action:hover { opacity: 0.85; }
button.action.secondary {
  background: var(--panel-2); color: var(--text);
  border: 1px solid var(--border);
}

/* ── Model answer / Essay paragraphs ── */
.model-answer { background: var(--code-bg); border-radius: 8px; padding: 20px; }
.essay-para { margin-bottom: 20px; padding-bottom: 20px; border-bottom: 1px solid var(--border); }
.essay-para:last-child { border-bottom: none; margin-bottom: 0; }
.para-role-label {
  display: inline-block; padding: 2px 10px; border-radius: 4px;
  font-size: 11px; font-weight: 700; margin-bottom: 8px;
  text-transform: uppercase; letter-spacing: 0.5px;
}
.para-role-label.intro      { background: #1e3a8a; color: #93c5fd; }
.para-role-label.overview   { background: #064e3b; color: #6ee7b7; }
.para-role-label.body1      { background: #4c1d95; color: #c4b5fd; }
.para-role-label.body2      { background: #7c2d12; color: #fdba74; }
.para-role-label.body3      { background: #1e3a5f; color: #7dd3fc; }
.para-role-label.conclusion { background: #374151; color: #d1d5db; }
.para-role-label.detail1    { background: #134e4a; color: #5eead4; }
.para-role-label.detail2    { background: #3b1f6b; color: #c084fc; }

/* ── Speaking Cue Card ── */
.cue-card {
  background: linear-gradient(135deg, rgba(6,78,59,0.2), rgba(16,185,129,0.1));
  border: 2px solid var(--good); border-radius: 12px; padding: 24px;
  margin: 16px 0;
}
.cue-card h3 { color: var(--good); margin-bottom: 12px; }
.cue-card ul { color: var(--text); }

.timer-display {
  display: inline-block; background: rgba(245,158,11,0.15); border: 1px solid var(--accent-3);
  padding: 6px 16px; border-radius: 8px; color: var(--accent-3); font-weight: 700; font-size: 18px;
  margin: 8px 0;
}
.timer-btn {
  background: var(--accent-3); color: #000; border: none;
  padding: 8px 20px; border-radius: 6px; cursor: pointer; font-weight: 700; font-size: 14px;
  margin: 8px 0;
}
.timer-btn:hover { opacity: 0.85; }

.model-toggle-btn {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  padding: 8px 18px; border-radius: 6px; cursor: pointer; font-size: 13px; margin-top: 10px;
}
.model-toggle-btn:hover { border-color: var(--accent); color: var(--accent); }
.model-content { display: none; margin-top: 12px; }
.model-content.open { display: block; }

.speaking-qa { display: flex; flex-direction: column; gap: 12px; margin: 12px 0; }
.qa-card {
  background: var(--code-bg); border-radius: 8px; padding: 16px; border: 1px solid var(--border);
}
.qa-question { color: var(--accent-3); font-weight: 600; margin-bottom: 8px; font-size: 14px; }
.qa-answer { font-size: 14px; color: var(--text); display: none; margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--border); }
.qa-answer.open { display: block; }

/* ── Listening transcript ── */
.transcript {
  background: var(--code-bg); border-radius: 8px; padding: 20px;
  border: 1px solid var(--border); font-size: 14px; line-height: 1.8;
  max-height: 500px; overflow-y: auto;
}
.transcript-line { margin-bottom: 10px; }
.speaker-name { color: var(--accent); font-weight: 700; }

/* ── Listening form inputs ── */
.fill-blank {
  background: var(--code-bg); color: var(--text); border: 2px solid var(--border);
  border-radius: 4px; padding: 4px 10px; font-size: 14px; width: 160px;
  font-family: inherit;
}
.fill-blank:focus { outline: none; border-color: var(--accent); }
.fill-blank.correct { border-color: var(--good); background: rgba(16,185,129,0.1); }
.fill-blank.wrong { border-color: var(--bad); background: rgba(239,68,68,0.1); }
.answer-reveal {
  display: inline-block; margin-left: 8px; padding: 2px 8px; border-radius: 4px;
  background: var(--good); color: #000; font-size: 12px; font-weight: 700;
}

/* ── Chart area ── */
.chart-wrap {
  background: var(--code-bg); border-radius: 8px; padding: 20px;
  border: 1px solid var(--border); margin: 16px 0; overflow-x: auto;
  text-align: center;
}

/* ── Phrase chips ── */
.phrase-group { margin-bottom: 16px; }
.phrase-group h4 { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 8px; }
.phrase-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.phrase-chip {
  background: rgba(59,130,246,0.1); border: 1px solid rgba(59,130,246,0.35);
  padding: 5px 12px; border-radius: 20px; font-size: 13px; color: #93c5fd;
}
.phrase-chip.green { background: rgba(16,185,129,0.1); border-color: rgba(16,185,129,0.35); color: #6ee7b7; }
.phrase-chip.amber { background: rgba(245,158,11,0.1); border-color: rgba(245,158,11,0.35); color: #fcd34d; }
.phrase-chip.red   { background: rgba(239,68,68,0.1); border-color: rgba(239,68,68,0.35); color: #fca5a5; }

/* ── Structure guide table ── */
.struct-table th { color: var(--accent-2); }

/* ── Matching question ── */
.match-block {
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 8px;
  padding: 14px 16px; margin-bottom: 10px;
}
.match-select {
  background: var(--code-bg); color: var(--text); border: 1px solid var(--border);
  border-radius: 4px; padding: 6px 10px; font-size: 14px; margin-top: 8px;
  font-family: inherit; cursor: pointer;
}
.match-select:focus { outline: none; border-color: var(--accent); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .layout { grid-template-columns: 1fr; }
  nav.toc { position: static; }
  .vocab-grid { grid-template-columns: repeat(2, 1fr); }
  .score-big { font-size: 56px; }
  .fill-blank { width: 120px; }
}