/* ==========================================================================
   TOEIC 攻略ノート ー マークシート・スタイル
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Shippori+Mincho:wght@500;600;800&family=Noto+Sans+JP:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
  --paper: #eef0e7;
  --paper-raised: #f7f8f2;
  --line: #c7cbb8;
  --line-soft: #dcded0;
  --ink: #1e2433;
  --ink-soft: #565f52;
  --ink-faint: #8a9081;
  --accent: #d99a2b;      /* pencil-mark gold */
  --accent-ink: #7a4e10;
  --listening: #2f6f8f;   /* blue-teal */
  --listening-tint: #e2edf1;
  --reading: #b5533c;     /* rust */
  --reading-tint: #f2e4dd;
  --correct: #3f7d4a;
  --wrong: #b5433c;
  --radius: 3px;
  --shadow: 0 1px 0 rgba(30, 36, 51, 0.06);
  --sidebar-w: 264px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'Noto Sans JP', sans-serif;
  -webkit-font-smoothing: antialiased;
}

body {
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 28px 28px;
  background-attachment: fixed;
  background-position: -1px -1px;
}

h1, h2, h3, .display {
  font-family: 'Shippori Mincho', serif;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: 0.01em;
}

a { color: inherit; }

.mono { font-family: 'JetBrains Mono', monospace; }

button { font-family: inherit; }

/* ---------- Layout ---------- */

.app {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--paper-raised);
  border-right: 1.5px solid var(--line);
  padding: 28px 20px 28px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 0 4px 20px;
  border-bottom: 2px solid var(--ink);
  margin-bottom: 22px;
  cursor: pointer;
}

.brand .mark {
  width: 30px; height: 30px;
  border: 2.5px solid var(--ink);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700; font-size: 12px;
  background: var(--accent);
  border-color: var(--accent-ink);
  color: var(--ink);
  flex-shrink: 0;
}

.brand-text { line-height: 1.15; }
.brand-text .jp { font-family: 'Shippori Mincho', serif; font-size: 17px; font-weight: 800; }
.brand-text .en { font-family: 'JetBrains Mono', monospace; font-size: 10px; letter-spacing: 0.12em; color: var(--ink-faint); text-transform: uppercase; }

.nav-group-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
  text-transform: uppercase;
  margin: 20px 6px 8px;
}
.nav-group-label:first-of-type { margin-top: 4px; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 11px;
  width: 100%;
  padding: 9px 8px;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: var(--radius);
  text-align: left;
  color: var(--ink-soft);
}

.nav-item:hover { background: var(--line-soft); }

.nav-item.active {
  background: var(--ink);
  color: var(--paper-raised);
}

.bubble {
  width: 24px; height: 24px;
  border-radius: 50%;
  border: 1.8px solid var(--ink-soft);
  display: flex; align-items: center; justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; font-weight: 700;
  flex-shrink: 0;
  background: var(--paper-raised);
  color: var(--ink-soft);
}

.nav-item.listening .bubble { border-color: var(--listening); color: var(--listening); }
.nav-item.reading .bubble { border-color: var(--reading); color: var(--reading); }

.nav-item.active .bubble {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--ink);
}

.nav-item-text { display: flex; flex-direction: column; line-height: 1.3; }
.nav-item-text .t1 { font-size: 13.5px; font-weight: 600; }
.nav-item-text .t2 { font-size: 10.5px; color: var(--ink-faint); font-family: 'JetBrains Mono', monospace; }
.nav-item.active .nav-item-text .t2 { color: #c9cdb8; }

.content {
  flex: 1;
  min-width: 0;
  padding: 44px 56px 100px;
  max-width: 980px;
}

@media (max-width: 860px) {
  .app { flex-direction: column; }
  .sidebar { width: 100%; height: auto; position: relative; border-right: none; border-bottom: 1.5px solid var(--line); }
  .content { padding: 32px 20px 80px; }
}

/* ---------- Home ---------- */

.hero {
  padding: 8px 0 34px;
  border-bottom: 2px solid var(--ink);
  margin-bottom: 36px;
}

.hero .eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-ink);
  background: var(--accent);
  display: inline-block;
  padding: 3px 9px;
  border-radius: 2px;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: 40px;
  line-height: 1.35;
  margin: 0 0 14px;
}

.hero p {
  font-size: 15px;
  color: var(--ink-soft);
  max-width: 60ch;
  line-height: 1.9;
  margin: 0;
}

.section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
  text-transform: uppercase;
  margin: 0 0 14px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
  margin-bottom: 40px;
}

.part-card {
  background: var(--paper-raised);
  border: 1.5px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 18px 16px;
  cursor: pointer;
  transition: border-color .12s ease, transform .12s ease;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.part-card:hover { border-color: var(--ink); transform: translateY(-2px); }

.part-card-top {
  display: flex;
  align-items: center;
  gap: 12px;
}

.part-card .bubble { width: 34px; height: 34px; font-size: 14px; }

.part-card-title { display: flex; flex-direction: column; }
.part-card-title .jp { font-family: 'Shippori Mincho', serif; font-weight: 700; font-size: 16.5px; }
.part-card-title .en { font-family: 'JetBrains Mono', monospace; font-size: 10.5px; color: var(--ink-faint); }

.part-card p { font-size: 12.5px; color: var(--ink-soft); line-height: 1.7; margin: 0; }

.part-card-tag {
  align-self: flex-start;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.08em;
  padding: 2px 8px;
  border-radius: 2px;
}
.part-card.listening .part-card-tag { background: var(--listening-tint); color: var(--listening); }
.part-card.reading .part-card-tag { background: var(--reading-tint); color: var(--reading); }

.tip-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
@media (max-width: 700px) { .tip-strip { grid-template-columns: 1fr; } }

.tip-strip .item {
  border-left: 3px solid var(--accent);
  padding: 4px 0 4px 14px;
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.7;
}

/* ---------- Part page ---------- */

.part-header {
  border-bottom: 2px solid var(--ink);
  padding-bottom: 22px;
  margin-bottom: 34px;
}

.part-header-top { display: flex; align-items: center; gap: 14px; margin-bottom: 12px; }
.part-header .bubble { width: 42px; height: 42px; font-size: 17px; }
.part-header .bubble.listening-b { border-color: var(--listening); color: var(--listening); }
.part-header .bubble.reading-b { border-color: var(--reading); color: var(--reading); }

.part-header h1 { font-size: 30px; margin: 0; line-height: 1.2; }
.part-header .en-title { font-family: 'JetBrains Mono', monospace; font-size: 11.5px; color: var(--ink-faint); letter-spacing: 0.08em; margin-top: 2px; }

.meta-row { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.meta-chip {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  padding: 4px 10px;
  border: 1.3px solid var(--line);
  border-radius: 20px;
  color: var(--ink-soft);
  background: var(--paper-raised);
}

.overview-text { font-size: 14px; line-height: 1.9; color: var(--ink-soft); margin: 0; max-width: 74ch; }

.block { margin-bottom: 46px; }

.block-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 18px;
}

.block-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--ink-faint);
}

.block-head h2 { font-size: 20px; margin: 0; }

/* tips list */
.tips-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.tips-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: var(--paper-raised);
  border: 1.3px solid var(--line);
  border-radius: var(--radius);
  padding: 13px 16px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink);
}
.tips-list .mk {
  flex-shrink: 0;
  width: 20px; height: 20px;
  border-radius: 50%;
  border: 1.6px solid var(--accent-ink);
  background: var(--accent);
  color: var(--ink);
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  margin-top: 2px;
}

/* vocab table */
.vocab-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1.3px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
@media (max-width: 640px) { .vocab-grid { grid-template-columns: 1fr; } }

.vocab-cell {
  background: var(--paper-raised);
  padding: 12px 16px;
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: baseline;
}
.vocab-cell .en { font-family: 'JetBrains Mono', monospace; font-size: 13px; font-weight: 700; color: var(--ink); }
.vocab-cell .ja { font-size: 12.5px; color: var(--ink-soft); text-align: right; white-space: nowrap; }

/* chunk chips */
.chunk-list { display: flex; flex-direction: column; gap: 8px; }
.chunk-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding: 11px 16px;
  border-bottom: 1px dashed var(--line);
  align-items: center;
}
.chunk-row:last-child { border-bottom: none; }
.chunk-row .en { font-family: 'JetBrains Mono', monospace; font-size: 13px; color: var(--listening); font-weight: 500; }
.chunk-row .ja { font-size: 13px; color: var(--ink-soft); }

/* examples */
.example-card {
  background: var(--paper-raised);
  border: 1.3px solid var(--line);
  border-left: 3px solid var(--reading);
  border-radius: var(--radius);
  padding: 14px 18px;
  margin-bottom: 10px;
}
.example-card .en { font-size: 14px; color: var(--ink); margin-bottom: 6px; line-height: 1.6; }
.example-card .ja { font-size: 12.5px; color: var(--ink-faint); }

/* quiz - OMR style */
.quiz-card {
  background: var(--paper-raised);
  border: 1.3px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px 16px;
  margin-bottom: 14px;
}
.quiz-q {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  margin: 0 0 14px;
  line-height: 1.75;
  display: flex;
  gap: 10px;
}
.quiz-q .qn { font-family: 'JetBrains Mono', monospace; color: var(--ink-faint); flex-shrink: 0; }

.quiz-options { display: flex; flex-direction: column; gap: 9px; }

.quiz-option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 12px;
  border: 1.3px solid var(--line);
  border-radius: 20px;
  background: var(--paper);
  cursor: pointer;
  font-size: 13.5px;
  color: var(--ink);
  text-align: left;
}
.quiz-option:hover { border-color: var(--ink-soft); }

.quiz-option .oval {
  width: 20px; height: 20px;
  border-radius: 50%;
  border: 1.8px solid var(--ink-soft);
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--ink-soft);
}

.quiz-option.selected .oval { background: var(--ink); border-color: var(--ink); color: var(--paper-raised); }
.quiz-option.correct { border-color: var(--correct); background: #eaf3ea; }
.quiz-option.correct .oval { background: var(--correct); border-color: var(--correct); color: #fff; }
.quiz-option.wrong { border-color: var(--wrong); background: #f6e9e7; }
.quiz-option.wrong .oval { background: var(--wrong); border-color: var(--wrong); color: #fff; }
.quiz-option.disabled { cursor: default; }

.quiz-explain {
  margin-top: 12px;
  padding: 11px 14px;
  background: var(--listening-tint);
  border-left: 3px solid var(--listening);
  border-radius: 2px;
  font-size: 12.5px;
  color: var(--ink-soft);
  line-height: 1.7;
  display: none;
}
.quiz-explain.show { display: block; }

.quiz-progress {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  padding: 10px 16px;
  background: var(--paper-raised);
  border: 1.3px solid var(--line);
  border-radius: var(--radius);
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--ink-soft);
}
.quiz-progress .score { font-weight: 700; color: var(--ink); }
.quiz-reset {
  border: 1.3px solid var(--ink);
  background: var(--ink);
  color: var(--paper-raised);
  padding: 5px 12px;
  border-radius: 16px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  cursor: pointer;
}
.quiz-reset:hover { opacity: 0.85; }

/* pager */
.pager {
  display: flex;
  justify-content: space-between;
  margin-top: 50px;
  padding-top: 22px;
  border-top: 1.5px solid var(--line);
}
.pager-btn {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 16px;
  border: 1.3px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-raised);
  cursor: pointer;
  max-width: 260px;
}
.pager-btn:hover { border-color: var(--ink); }
.pager-btn .dir { font-family: 'JetBrains Mono', monospace; font-size: 10px; color: var(--ink-faint); letter-spacing: 0.08em; }
.pager-btn .lbl { font-family: 'Shippori Mincho', serif; font-size: 14px; font-weight: 700; }
.pager-btn.next { text-align: right; align-items: flex-end; margin-left: auto; }
.pager-spacer { flex: 1; }

/* footer note */
.foot-note {
  margin-top: 60px;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
  font-size: 11.5px;
  color: var(--ink-faint);
  font-family: 'JetBrains Mono', monospace;
}