*{box-sizing:border-box;margin:0;padding:0}
:root{
  --ink:#1a1a2e;
  --paper:#faf8f3;
  --red:#c0392b;
  --gold:#c8940f;
  --green:#2e7d32;
  --border:#e0d8c8;
  --muted:#888;
  --card:#fff;
  --radius:14px;
  --font-jp:'Noto Serif JP',serif;
  --font-display:'DM Serif Display',serif;
  --font-body:'DM Sans',sans-serif;
}
body{font-family:var(--font-body);background:var(--paper);min-height:100vh;color:var(--ink);}

/* ── TOPBAR ── */
.topbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:0 20px;height:56px;border-bottom:1px solid var(--border);
  background:var(--card);position:sticky;top:0;z-index:100;
}
.topbar-title{font-family:var(--font-display);font-size:20px;}
.topbar-right{display:flex;align-items:center;gap:10px;}
.lang-select{
  font-family:var(--font-body);font-size:13px;font-weight:500;
  padding:5px 10px;border-radius:8px;border:1.5px solid var(--border);
  background:var(--paper);color:var(--ink);cursor:pointer;
}
.nav-btn{
  font-family:var(--font-body);font-size:12px;font-weight:600;
  padding:5px 12px;border-radius:8px;border:1.5px solid var(--border);
  background:transparent;color:var(--ink);cursor:pointer;letter-spacing:.3px;
  transition:all .15s;
}
.nav-btn:hover{background:var(--paper);}
.nav-btn.active{background:var(--ink);color:#fff;border-color:var(--ink);}

/* ── PAGES ── */
.page{display:none;padding:28px 16px 60px;max-width:600px;margin:0 auto;}
#page-glossary,#page-about{max-width:900px;}
.page.visible{display:block;}

/* ── GLOSSARY PAGE ── */
.glossary-hero{text-align:center;margin-bottom:32px;}
.glossary-hero-title{font-family:var(--font-display);font-size:30px;margin-bottom:6px;}
.glossary-hero-sub{font-size:14px;color:var(--muted);line-height:1.6;max-width:380px;margin:0 auto 20px;}
.start-btn{
  padding:12px 28px;background:var(--ink);color:#fff;border:none;
  border-radius:10px;font-family:var(--font-body);font-size:14px;font-weight:600;
  cursor:pointer;transition:opacity .15s;
}
.start-btn:hover{opacity:.85;}

.glossary-grid{display:flex;flex-direction:column;gap:12px;}
.glossary-card{
  background:var(--card);border:1.5px solid var(--border);
  border-radius:var(--radius);overflow:hidden;cursor:pointer;
  transition:border-color .15s;
}
.glossary-card:hover{border-color:#aaa;}
.glossary-card.open{border-color:var(--gold);}
.gc-head{display:flex;align-items:center;gap:12px;padding:14px 16px;}
.gc-icon{font-size:24px;min-width:36px;text-align:center;}
.gc-term{font-size:15px;font-weight:500;}
.gc-arrow{margin-left:auto;font-size:14px;color:var(--muted);transition:transform .2s;}
.glossary-card.open .gc-arrow{transform:rotate(180deg);}
.gc-body{display:none;padding:0 16px 14px;border-top:1px solid var(--border);}
.glossary-card.open .gc-body{display:block;}
.gc-def{font-size:13px;color:var(--ink);line-height:1.7;margin:10px 0 8px;}
.gc-example{font-size:12px;color:var(--muted);background:var(--paper);border-radius:8px;padding:8px 12px;line-height:1.5;}
.gc-ex-label{font-weight:600;color:var(--gold);margin-right:4px;}

/* ── LEARN PAGE ── */
.tiers{display:flex;justify-content:center;gap:8px;margin-bottom:20px;flex-wrap:wrap;}
.tier-pill{font-size:11px;font-weight:600;padding:5px 14px;border-radius:20px;border:1.5px solid var(--border);color:var(--muted);letter-spacing:.6px;text-transform:uppercase;}
.tier-pill.active{background:var(--ink);color:#fff;border-color:var(--ink);}
.tier-pill.done{background:var(--green);color:#fff;border-color:var(--green);}

.progress-row{display:flex;align-items:center;gap:10px;margin-bottom:20px;}
.yaku-dots{display:flex;gap:5px;flex:1;flex-wrap:wrap;}
.dot{width:11px;height:11px;border-radius:50%;border:1.5px solid var(--border);background:transparent;transition:all .25s;}
.dot.done{background:var(--green);border-color:var(--green);}
.dot.current{background:var(--gold);border-color:var(--gold);}
.progress-label{font-size:12px;color:var(--muted);white-space:nowrap;}

/* Card */
.yaku-card{background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:0 4px 16px rgba(0,0,0,.07);}
.step-badge{display:inline-block;font-size:10px;font-weight:600;letter-spacing:1px;text-transform:uppercase;background:var(--paper);border:1px solid var(--border);border-radius:4px;padding:3px 9px;color:var(--muted);margin-bottom:14px;}
.yaku-header{padding:22px 100px 0 22px;position:relative;}
.yaku-name{font-family:var(--font-display);font-size:28px;color:var(--ink);margin-bottom:2px;}
.yaku-jp{font-family:var(--font-jp);font-size:17px;color:var(--muted);margin-bottom:14px;}
.yaku-tags{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:18px;}
.tag{font-size:11px;font-weight:600;padding:3px 10px;border-radius:20px;}
.tag-han-1{background:#eaf3de;color:#2e7d32;}
.tag-han-2{background:#e6f1fb;color:#185fa5;}
.tag-han-hi{background:#faeeda;color:#854f0b;}
.tag-han-yk{background:#fcebeb;color:#a32d2d;}
.tag-closed{background:#f5f0ff;color:#5e35b1;}
.tag-open{background:#f0f9f0;color:#2e7d32;}

.tiles-wrap{padding:0 22px 18px;}
.tiles-box{background:var(--paper);border:1px solid var(--border);border-radius:10px;padding:14px 16px;font-size:34px;letter-spacing:4px;line-height:1.5;min-height:64px;word-break:break-word;}
.tiles-label{font-size:11px;color:var(--muted);margin-top:5px;}
.divider{height:1px;background:var(--border);}

.detail-section{padding:18px 22px;}
.detail-title{font-size:10px;font-weight:600;letter-spacing:.9px;text-transform:uppercase;color:var(--muted);margin-bottom:6px;}
.detail-text{font-size:14px;color:var(--ink);line-height:1.7;margin-bottom:16px;}
.tip-box{background:#fffbea;border-left:3px solid var(--gold);border-radius:0 8px 8px 0;padding:10px 14px;font-size:13px;color:#5a4000;margin-bottom:16px;line-height:1.55;}

.nav-row{display:flex;justify-content:space-between;align-items:center;gap:8px;}
.btn{padding:10px 20px;border-radius:9px;font-size:13px;font-weight:600;cursor:pointer;border:1.5px solid transparent;font-family:var(--font-body);transition:all .15s;}
.btn-primary{background:var(--ink);color:#fff;border-color:var(--ink);}
.btn-primary:hover{opacity:.85;}
.btn-primary:disabled{opacity:.3;cursor:default;}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--border);}
.btn-ghost:hover{background:var(--paper);}
.btn-green{background:var(--green);color:#fff;border-color:var(--green);}
.btn-green:hover{opacity:.88;}
.step-hint{font-size:12px;color:var(--muted);}

/* Quiz */
.quiz-section{padding:18px 22px;}
.quiz-q{font-size:14px;font-weight:500;color:var(--ink);margin-bottom:14px;line-height:1.6;}
.quiz-opts{display:flex;flex-direction:column;gap:10px;margin-bottom:14px;}
.quiz-opt{border:1.5px solid var(--border);border-radius:10px;cursor:pointer;text-align:left;background:transparent;color:var(--ink);transition:all .15s;font-family:var(--font-body);overflow:hidden;}
.quiz-opt:hover:not(:disabled){border-color:#aaa;background:var(--paper);}
.quiz-opt.correct{border-color:var(--green);background:#eaf3de;}
.quiz-opt.wrong{border-color:var(--red);background:#fdf0ef;}
.opt-tiles{font-size:26px;letter-spacing:3px;line-height:1.5;padding:12px 14px 6px;background:var(--paper);word-break:break-word;border-bottom:1px solid var(--border);}
.quiz-opt.correct .opt-tiles{background:#d4edda;}
.quiz-opt.wrong .opt-tiles{background:#fde8e8;}
.opt-label{font-size:12px;padding:8px 14px 10px;color:var(--muted);line-height:1.4;}
.quiz-opt.correct .opt-label{color:#2e7d32;font-weight:500;}
.quiz-opt.wrong .opt-label{color:var(--red);}
.quiz-result{font-size:13px;font-weight:500;margin-bottom:12px;}
.quiz-result.ok{color:var(--green);}
.quiz-result.bad{color:var(--red);}

/* Complete */
.complete-screen{text-align:center;padding:48px 24px;}
.complete-tiles{font-size:48px;letter-spacing:4px;margin-bottom:16px;}
.complete-title{font-family:var(--font-display);font-size:26px;margin-bottom:8px;}
.complete-sub{font-size:14px;color:var(--muted);line-height:1.7;margin-bottom:24px;}

/* Header counter */
.header-sub{font-size:11px;color:var(--muted);margin-top:1px;}

/* Han corner badge */
.han-corner{position:absolute;top:20px;right:18px;text-align:right;line-height:1;}
.han-num{font-family:var(--font-display);font-size:34px;display:block;}
.han-unit{font-size:10px;font-weight:600;letter-spacing:.6px;text-transform:uppercase;color:var(--muted);}
.han-open-note{font-size:10px;color:var(--muted);margin-top:1px;}
.han-clr-1{color:#2e7d32;}
.han-clr-2{color:#185fa5;}
.han-clr-hi{color:#854f0b;}
.han-clr-yk{color:#a32d2d;}

/* Review banner */
.review-banner{background:#fff8e1;border:1px solid var(--gold);border-radius:10px;padding:10px 14px;margin-bottom:14px;font-size:13px;color:#5a4000;text-align:center;font-weight:500;}

/* About page */
.about-hero{text-align:center;margin-bottom:28px;}
.about-hero-title{font-family:var(--font-display);font-size:26px;margin-bottom:6px;}
.about-hero-sub{font-size:14px;color:var(--muted);line-height:1.6;max-width:380px;margin:0 auto;}
.about-section{margin-bottom:24px;}
.about-section-title{font-family:var(--font-display);font-size:18px;margin-bottom:10px;color:var(--ink);}
.about-p{font-size:14px;color:var(--ink);line-height:1.7;margin-bottom:10px;}
.about-tile-row{display:flex;gap:10px;flex-wrap:wrap;margin:12px 0;}
.about-tile-group{background:var(--card);border:1.5px solid var(--border);border-radius:10px;padding:10px 14px;flex:1;min-width:120px;}
.about-tile-group-title{font-size:11px;font-weight:600;letter-spacing:.5px;text-transform:uppercase;color:var(--muted);margin-bottom:6px;}
.about-tile-group-tiles{font-size:26px;letter-spacing:2px;}
.score-table{width:100%;border-collapse:collapse;font-size:13px;margin:10px 0;}
.score-table th{font-size:10px;font-weight:600;letter-spacing:.5px;text-transform:uppercase;color:var(--muted);text-align:left;padding:6px 10px;border-bottom:1.5px solid var(--border);background:var(--paper);}
.score-table td{padding:8px 10px;border-bottom:1px solid var(--border);}
.score-table tr:last-child td{border-bottom:none;}
.score-table{background:var(--card);border:1.5px solid var(--border);border-radius:10px;overflow:hidden;}

/* Table diagram (Angin section) */
.table-diag{display:grid;grid-template-columns:1fr 1fr 1fr;grid-template-rows:1fr 1fr 1fr;gap:4px;max-width:280px;margin:14px auto;}
.table-pos{background:var(--card);border:1.5px solid var(--border);border-radius:8px;padding:10px 6px;text-align:center;font-size:12px;line-height:1.4;}
.table-pos .wind-emoji{font-size:22px;display:block;margin-bottom:2px;}
.table-pos .wind-name{font-weight:700;font-size:13px;}
.table-pos .wind-kanji{font-size:10px;color:var(--muted);}
.table-pos .wind-role{font-size:11px;color:var(--muted);margin-top:2px;}
.table-pos.is-dealer{border-color:var(--gold);background:#fffbea;}
.table-pos.is-dealer .wind-name{color:#7a5200;}
.table-center-cell{background:var(--paper);border:1.5px solid var(--border);border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:11px;color:var(--muted);font-weight:600;letter-spacing:.5px;text-transform:uppercase;}

/* Welcome page */
#page-welcome{padding:0;}
.welcome-wrap{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:calc(100vh - 56px);text-align:center;padding:40px 24px 56px;}
.welcome-logo{font-family:var(--font-display);font-size:40px;margin-bottom:6px;color:var(--ink);}
.welcome-tagline{font-size:15px;color:var(--muted);margin-bottom:28px;}
.welcome-desc{max-width:440px;font-size:14px;line-height:1.75;color:var(--ink);margin-bottom:40px;}
.welcome-lang-label{font-size:11px;font-weight:600;letter-spacing:.5px;text-transform:uppercase;color:var(--muted);margin-bottom:14px;}
.welcome-lang-btns{display:flex;gap:12px;}
.welcome-lang-btn{border:1.5px solid var(--border);background:var(--card);border-radius:10px;padding:13px 32px;font-size:15px;font-weight:600;cursor:pointer;color:var(--ink);font-family:var(--font-body);}
.welcome-lang-btn:hover{border-color:var(--ink);}

/* Chun tile white background fix */
.chun-fix{background:#fff;border-radius:3px;padding:0 2px;display:inline-block;line-height:1.2;}

/* Site footer */
.site-footer{position:fixed;bottom:0;left:0;right:0;z-index:50;text-align:center;padding:14px 16px;font-size:12px;color:var(--muted);border-top:1px solid var(--border);background:var(--card);}

/* Burger / mobile menu */
.burger-btn{display:none;align-items:center;justify-content:center;background:none;border:1.5px solid var(--border);border-radius:8px;padding:7px 11px;cursor:pointer;color:var(--ink);font-size:19px;line-height:1;}
#mobile-menu{display:none;position:absolute;top:100%;left:-20px;right:-20px;background:var(--card);border-bottom:1px solid var(--border);z-index:99;padding:12px 20px 16px;flex-direction:column;gap:6px;box-shadow:0 4px 16px rgba(0,0,0,.1);}
#mobile-menu.open{display:flex;}
.mobile-lang-row{display:flex;gap:8px;padding-bottom:12px;border-bottom:1px solid var(--border);margin-bottom:6px;}
.mobile-lang-opt{flex:1;text-align:center;padding:9px 8px;border:1.5px solid var(--border);border-radius:8px;background:transparent;font-size:13px;font-weight:600;cursor:pointer;font-family:var(--font-body);color:var(--ink);}
.mobile-lang-opt.active{background:var(--ink);color:#fff;border-color:var(--ink);}
.mobile-nav-btn{width:100%;text-align:left;padding:11px 14px;border:none;border-radius:10px;background:transparent;font-size:15px;font-weight:500;cursor:pointer;font-family:var(--font-body);color:var(--ink);}
.mobile-nav-btn.active{background:var(--paper);font-weight:600;}

/* ── RESPONSIVE ── */
@media (max-width: 640px) {
  .topbar-right{display:none;}
  .burger-btn{display:inline-flex;}

  .welcome-wrap{padding:32px 20px 56px;}
  .welcome-logo{font-size:32px;}
  .welcome-lang-btns{flex-direction:column;width:100%;max-width:280px;}
  .welcome-lang-btn{padding:13px 20px;text-align:center;}

  .tiles-box{font-size:26px;letter-spacing:2px;}

  .yaku-header{padding:16px 78px 0 16px;}
  .han-corner{top:14px;right:12px;}
  .han-num{font-size:26px;}

  .score-table{font-size:12px;}
  .score-table th,.score-table td{padding:5px 8px;}

  .about-tile-group{min-width:0 !important;}
  .table-diag{max-width:240px;}

  .complete-tiles{font-size:36px;}
  .nav-row{flex-wrap:wrap;}
}