/* Shared stylesheet for all Japanese lessons & references.
   Tufte-inspired: serif body, generous margins, restrained palette, prints well.
   Linked by every lesson so the course looks like one consistent whole. */

:root {
  --ink: #1a1a1a;
  --paper: #fffdf8;
  --muted: #6b6457;
  --rule: #e4ddcf;
  --accent: #9c2b2b;     /* vermilion — Japanese seal red */
  --accent-soft: #f6e9e6;
  --good: #2e6e3f;
  --good-soft: #e7f1e9;
  --bad: #9c2b2b;
  --bad-soft: #f6e9e6;
  --kana-font: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans CJK JP",
               "Noto Sans JP", "MS Gothic", sans-serif;
}

* { box-sizing: border-box; }

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

body {
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  max-width: 42rem;
  margin: 0 auto;
  padding: 3rem 1.5rem 6rem;
  font-size: 1.12rem;
}

h1, h2, h3 { line-height: 1.15; font-weight: 600; letter-spacing: -0.01em; }
h1 { font-size: 2.1rem; margin: 0 0 0.2rem; }
h2 { font-size: 1.4rem; margin: 2.6rem 0 0.8rem; }
h3 { font-size: 1.1rem; margin: 1.8rem 0 0.5rem; }

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.72rem;
  color: var(--accent);
  font-family: var(--kana-font);
  margin: 0 0 1.4rem;
}

a { color: var(--accent); text-decoration: none; border-bottom: 1px solid var(--rule); }
a:hover { border-color: var(--accent); }

hr { border: none; border-top: 1px solid var(--rule); margin: 2.5rem 0; }

blockquote.mission {
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  margin: 1.5rem 0;
  padding: 0.8rem 1.2rem;
  font-style: italic;
  color: var(--muted);
}

/* Kana display */
.kana { font-family: var(--kana-font); }
.big-kana { font-family: var(--kana-font); font-size: 3.2rem; line-height: 1; }

/* Character cards grid */
.kana-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(5.5rem, 1fr));
  gap: 0.6rem;
  margin: 1.4rem 0;
}
.kana-card {
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 0.8rem 0.4rem;
  text-align: center;
  background: #fff;
}
.kana-card .glyph { font-family: var(--kana-font); font-size: 2.4rem; line-height: 1.1; }
.kana-card .roma { color: var(--muted); font-size: 0.95rem; margin-top: 0.2rem; }
.kana-card.learned { border-color: var(--accent); background: var(--accent-soft); }
.kana-card.dim { opacity: 0.32; }

/* Mnemonic callouts */
.mnemonic {
  display: flex; gap: 0.9rem; align-items: flex-start;
  background: #fff; border: 1px solid var(--rule); border-radius: 8px;
  padding: 0.9rem 1.1rem; margin: 0.7rem 0;
}
.mnemonic .glyph { font-family: var(--kana-font); font-size: 2.6rem; line-height: 1; color: var(--accent); }
.mnemonic .text { font-size: 0.98rem; }
.mnemonic .text b { color: var(--ink); }

/* Word-building examples */
.word { font-family: var(--kana-font); font-size: 1.5rem; }
table.words { width: 100%; border-collapse: collapse; margin: 1rem 0; }
table.words td { padding: 0.45rem 0.6rem; border-bottom: 1px solid var(--rule); }
table.words td:first-child { font-family: var(--kana-font); font-size: 1.4rem; width: 28%; }
table.words td:nth-child(2) { color: var(--muted); width: 26%; }

/* Footer / nav / teacher reminder */
.teacher-note {
  background: var(--good-soft); border-radius: 8px; padding: 1rem 1.2rem;
  margin: 2.5rem 0 1rem; font-size: 0.98rem;
}
.lesson-nav { display: flex; justify-content: space-between; font-size: 0.92rem; margin-top: 2rem; }
footer { color: var(--muted); font-size: 0.85rem; margin-top: 3rem; border-top: 1px solid var(--rule); padding-top: 1rem; }

@media print {
  body { max-width: none; font-size: 11pt; }
  .quiz, .lesson-nav { display: none; }
  a { color: var(--ink); border: none; }
}