:root {
  --black: #000000;
  --near-black: #1d1d1f;
  --dark-gray: #424245;
  --mid-gray: #6e6e73;
  --light-gray: #f5f5f7;
  --white: #ffffff;
  --apple-blue: #0071e3;
  --apple-blue-hover: #0077ed;
  --apple-blue-bg: #e8f1fb;

  --bg: #f5f5f7;
  --card: #ffffff;
  --primary: #0071e3;
  --primary-light: #3395ff;
  --primary-dark: #005bb5;
  --primary-bg: #e8f1fb;
  --success: #1d8a2e;
  --success-bg: #f0fdf2;
  --danger: #d70015;
  --danger-bg: #fff2f2;
  --warning: #ff6b00;
  --text: #1d1d1f;
  --text-secondary: #424245;
  --text-muted: #6e6e73;
  --border: #d2d2d7;
  --border-light: #e8e8ed;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.04);
  --shadow: 0 2px 8px rgba(0,0,0,.06);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.10);
  --radius: 12px;
  --radius-sm: 10px;
  --radius-pill: 980px;
  --transition: .3s cubic-bezier(.4,0,.2,1);
  --font: -apple-system, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Arial, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* { margin:0; padding:0; box-sizing:border-box; -webkit-tap-highlight-color:transparent; }
html,body { height:100%; overflow:hidden; }
body { font-family:var(--font); background:#e5e5ea; color:var(--text); }

/* ===== Tablet Shell ===== */
#app-shell {
  position:relative; width:100%; height:100%;
  max-width:768px; margin:0 auto;
  background:var(--bg); overflow:hidden;
  box-shadow:0 0 0 1px rgba(0,0,0,.08);
}
@media (min-width:769px) {
  body { display:flex; align-items:center; justify-content:center; }
  #app-shell {
    height:min(100vh, 1024px);
    border-radius:24px; box-shadow:var(--shadow-lg), 0 0 0 1px rgba(0,0,0,.08);
    margin:20px auto;
  }
}

/* ===== Screen System ===== */
.screen {
  position:absolute; inset:0;
  display:flex; flex-direction:column;
  opacity:0; pointer-events:none;
  transition: opacity .4s ease, transform .4s ease;
  transform: translateY(12px);
  overflow-y:auto; overflow-x:hidden;
  -webkit-overflow-scrolling:touch;
}
.screen.active {
  opacity:1; pointer-events:auto; transform:translateY(0); z-index:2;
}
.screen.exit {
  opacity:0; transform:translateY(-8px); z-index:1; pointer-events:none;
}

/* ===== Typography ===== */
h1 { font-size:28px; font-weight:600; letter-spacing:-.035em; line-height:1.07; }
h2 { font-size:22px; font-weight:600; letter-spacing:-.025em; line-height:1.14; }
h3 { font-size:17px; font-weight:600; letter-spacing:-.02em; }

/* ===== Buttons ===== */
.btn {
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  border:none; border-radius:var(--radius-sm); font-family:var(--font);
  font-size:16px; font-weight:600; cursor:pointer;
  padding:14px 28px; transition:all .15s ease;
  position:relative; overflow:hidden; letter-spacing:-.01em;
}
.btn::after {
  content:''; position:absolute; inset:0;
  background:rgba(255,255,255,0); transition:background .15s;
}
.btn:active::after { background:rgba(0,0,0,.06); }
.btn:active { transform:scale(.97); }
.btn-primary { background:var(--apple-blue); color:#fff; border-radius:var(--radius-pill); }
.btn-primary:hover { background:var(--apple-blue-hover); }
.btn-ghost { background:transparent; color:var(--apple-blue); }
.btn-ghost:hover { background:var(--primary-bg); }
.btn-outline { background:#fff; color:var(--near-black); border:1.5px solid var(--border); border-radius:var(--radius-pill); }
.btn-outline:hover { border-color:var(--apple-blue); color:var(--apple-blue); }
.btn-block { width:100%; }
.btn-lg { padding:16px 32px; font-size:17px; }
.btn-sm { padding:8px 16px; font-size:13px; }

/* ===== Icon Buttons ===== */
.icon-btn {
  width:40px; height:40px; border-radius:10px; border:none;
  background:transparent; cursor:pointer; display:flex;
  align-items:center; justify-content:center; transition:all .15s;
  color:var(--text-secondary); flex-shrink:0;
}
.icon-btn:hover { background:var(--border-light); }
.icon-btn:active { transform:scale(.92); }
.icon-btn svg { width:20px; height:20px; }

/* ===== Top Nav ===== */
.topnav {
  display:flex; align-items:center; justify-content:space-between;
  padding:12px 20px; background:rgba(255,255,255,.85);
  backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid var(--border-light); flex-shrink:0;
  min-height:56px;
}
.topnav-title { font-size:17px; font-weight:600; letter-spacing:-.02em; color:var(--near-black); }
.topnav-center { position:absolute; left:50%; transform:translateX(-50%); }

/* ===== Container ===== */
.container { max-width:600px; margin:0 auto; padding:0 24px; width:100%; }
.scroll-area { flex:1; overflow-y:auto; -webkit-overflow-scrolling:touch; }

/* ===== Chip / Tag ===== */
.chip {
  display:inline-flex; align-items:center; gap:4px;
  font-size:12px; font-weight:600; padding:4px 10px;
  border-radius:var(--radius-pill); background:var(--primary-bg); color:var(--apple-blue);
  letter-spacing:-.01em;
}

/* ===============================================
   LP
   =============================================== */
#screenLP {
  background:#000000;
  color:#fff; text-align:center; justify-content:center; align-items:center;
}
.lp-inner { padding:40px 24px; max-width:420px; }
.lp-logo {
  width:72px; height:72px; background:rgba(255,255,255,.1);
  border-radius:18px; display:flex; align-items:center; justify-content:center;
  margin:0 auto 24px;
  border:1px solid rgba(255,255,255,.15);
}
.lp-logo svg { width:36px; height:36px; }
.lp-title {
  font-size:36px; font-weight:600; margin-bottom:10px;
  letter-spacing:-.035em; line-height:1.07;
}
.lp-sub { font-size:15px; color:rgba(255,255,255,.72); line-height:1.7; margin-bottom:36px; }
.lp-price-card {
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.12);
  border-radius:16px; padding:28px 24px; margin-bottom:32px;
}
.lp-price-amount { font-size:52px; font-weight:600; letter-spacing:-.04em; line-height:1; }
.lp-price-amount small { font-size:16px; font-weight:400; letter-spacing:0; }
.lp-price-trial {
  margin-top:10px; font-size:14px; color:rgba(255,255,255,.65);
  display:flex; align-items:center; justify-content:center; gap:6px;
}
.lp-price-trial svg { width:16px; height:16px; }
.lp-features { text-align:left; margin-bottom:36px; display:flex; flex-direction:column; gap:14px; }
.lp-feature {
  display:flex; align-items:center; gap:12px; font-size:14px; font-weight:400;
  line-height:1.5; color:rgba(255,255,255,.85);
}
.lp-feature-icon {
  width:32px; height:32px; border-radius:8px; flex-shrink:0;
  background:rgba(255,255,255,.1); display:flex; align-items:center; justify-content:center;
}
.lp-feature-icon svg { width:16px; height:16px; }
.lp-cta {
  width:100%; padding:18px; border-radius:var(--radius-pill); border:none;
  background:var(--apple-blue); color:#fff; font-family:var(--font);
  font-size:17px; font-weight:600; cursor:pointer; letter-spacing:-.01em;
  transition:all .2s;
}
.lp-cta:hover { background:var(--apple-blue-hover); }
.lp-cta:active { transform:scale(.97); }
.lp-login { margin-top:20px; font-size:14px; color:rgba(255,255,255,.55); cursor:pointer; transition:color .15s; }
.lp-login:hover { color:rgba(255,255,255,.85); }
/* フォームカード内リンク（暗い背景以外で使用） */
.form-link { font-size:13px; color:var(--apple-blue); cursor:pointer; transition:opacity .15s; text-decoration:underline; text-underline-offset:3px; }
.form-link:hover { opacity:.7; }

/* ===============================================
   Signup
   =============================================== */
#screenSignup .form-card {
  background:var(--card); border-radius:var(--radius); padding:28px 24px;
  box-shadow:var(--shadow); margin-top:24px;
  border:1px solid var(--border-light);
}
.input-group { margin-bottom:18px; }
.input-group label {
  display:block; font-size:13px; font-weight:600;
  color:var(--text-secondary); margin-bottom:6px; letter-spacing:-.01em;
}
.input-group input, .input-group select {
  width:100%; padding:14px 16px; border:1.5px solid var(--border);
  border-radius:var(--radius-sm); font-family:var(--font); font-size:16px;
  background:var(--bg); transition:border-color .2s; color:var(--text);
  appearance:none; -webkit-appearance:none;
}
.input-group input:focus, .input-group select:focus {
  outline:none; border-color:var(--apple-blue); background:#fff;
}
.input-group select { background-image:url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%236e6e73' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E"); background-repeat:no-repeat; background-position:right 16px center; padding-right:40px; }
.form-note { font-size:12px; color:var(--text-muted); text-align:center; margin-top:16px; line-height:1.6; }

/* ===============================================
   Home
   =============================================== */
.home-hero {
  background:#000000;
  color:#fff; padding:28px 20px 36px; position:relative; overflow:hidden;
}
.home-greeting { font-size:14px; color:rgba(255,255,255,.6); margin-bottom:4px; }
.home-name { font-size:26px; font-weight:600; margin-bottom:18px; letter-spacing:-.035em; line-height:1.07; }
.home-streak {
  display:inline-flex; align-items:center; gap:6px;
  background:rgba(255,255,255,.12); border-radius:var(--radius-pill);
  padding:6px 14px; font-size:13px; font-weight:500;
}
.home-streak svg { width:16px; height:16px; }
.home-cards { padding:0 20px; margin-top:20px; position:relative; z-index:2; }
.home-card {
  background:var(--card); border-radius:var(--radius); padding:20px;
  box-shadow:var(--shadow); margin-bottom:10px;
  display:flex; align-items:center; gap:16px;
  cursor:pointer; transition:all .2s; border:1px solid var(--border-light);
}
.home-card:hover { border-color:var(--apple-blue); transform:translateY(-1px); box-shadow:var(--shadow-lg); }
.home-card:active { transform:scale(.98); }
.home-card-icon {
  width:48px; height:48px; border-radius:12px; flex-shrink:0;
  display:flex; align-items:center; justify-content:center;
}
.home-card-icon svg { width:22px; height:22px; }
.home-card-icon.purple { background:var(--primary-bg); color:var(--apple-blue); }
.home-card-icon.purple svg { stroke:var(--apple-blue); }
.home-card-icon.orange { background:#fff4eb; }
.home-card-icon.orange svg { stroke:#cc5500; }
.home-card-icon.teal { background:#edfafa; }
.home-card-icon.teal svg { stroke:#007a7a; }
.home-card-body { flex:1; min-width:0; }
.home-card-body h3 { font-size:15px; margin-bottom:2px; letter-spacing:-.01em; }
.home-card-body p { font-size:13px; color:var(--text-muted); }
.home-card-arrow { color:var(--border); flex-shrink:0; }
.home-card-arrow svg { width:16px; height:16px; }

/* ===== Bottom Nav ===== */
.bottom-nav {
  position:absolute; bottom:0; left:0; right:0;
  display:flex; background:var(--card);
  border-top:1px solid var(--border-light);
  padding:8px 0 max(8px, env(safe-area-inset-bottom));
  z-index:100;
}
.bottom-nav-item {
  flex:1; display:flex; flex-direction:column; align-items:center; gap:3px;
  background:none; border:none; padding:6px 0; cursor:pointer;
  color:var(--text-muted); font-size:10px; font-weight:500;
  transition:color .15s;
}
.bottom-nav-item svg { width:22px; height:22px; }
.bottom-nav-item.active { color:var(--apple-blue); }
.bottom-nav-item:not(.active):active { color:var(--text-secondary); }

.home-progress {
  margin:8px 20px 20px; background:var(--card); border-radius:var(--radius);
  padding:20px; box-shadow:var(--shadow-sm); border:1px solid var(--border-light);
}
.home-progress-header { display:flex; justify-content:space-between; align-items:center; margin-bottom:12px; }
.home-progress-header h3 { font-size:13px; font-weight:500; color:var(--text-secondary); }
.home-progress-header span { font-size:13px; color:var(--apple-blue); font-weight:600; }
.progress-track {
  height:6px; background:var(--border-light); border-radius:var(--radius-pill); overflow:hidden;
}
.progress-track-fill {
  height:100%; border-radius:var(--radius-pill);
  background:var(--apple-blue);
  transition:width .6s cubic-bezier(.4,0,.2,1);
}

/* ===============================================
   Unit Select
   =============================================== */
.unit-grid { display:flex; flex-direction:column; gap:8px; padding:20px; }
.unit-card {
  background:var(--card); border-radius:var(--radius); padding:16px 18px;
  box-shadow:var(--shadow-sm); cursor:pointer;
  display:flex; align-items:center; justify-content:space-between;
  transition:all .2s; border:1px solid var(--border-light);
}
.unit-card:hover { border-color:var(--apple-blue); transform:translateY(-1px); box-shadow:var(--shadow); }
.unit-card:active { transform:scale(.98); }
.unit-card-left { display:flex; align-items:center; gap:14px; }
.unit-card-dot { width:8px; height:8px; border-radius:50%; flex-shrink:0; }
.unit-card-dot.green { background:#1d8a2e; }
.unit-card-dot.blue { background:var(--apple-blue); }
.unit-card-dot.teal { background:#007a7a; }
.unit-card-dot.orange { background:#cc5500; }
.unit-card-dot.red { background:#d70015; }
.unit-card-dot.purple { background:#6e4aad; }
.unit-card-name { font-size:15px; font-weight:600; letter-spacing:-.01em; }
.unit-card-meta { font-size:12px; color:var(--text-muted); margin-top:2px; }
.unit-card-right { display:flex; align-items:center; gap:8px; }

/* ===============================================
   Quiz
   =============================================== */
#screenQuiz { background:#f5f5f7; }
.quiz-top {
  display:flex; align-items:center; justify-content:space-between;
  padding:12px 20px; background:rgba(255,255,255,.85);
  backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid var(--border-light); flex-shrink:0;
}
.quiz-progress-dots {
  display:flex; gap:4px; align-items:center;
}
.quiz-dot {
  width:8px; height:8px; border-radius:50%; background:var(--border-light);
  transition:all .3s;
}
.quiz-dot.done { background:var(--success); }
.quiz-dot.wrong { background:var(--danger); }
.quiz-dot.current { background:var(--apple-blue); width:20px; border-radius:var(--radius-pill); }
.quiz-score-badge {
  display:flex; align-items:center; gap:4px;
  font-size:14px; font-weight:600; color:var(--apple-blue);
}
.quiz-score-badge svg { width:18px; height:18px; stroke:var(--apple-blue); }

.quiz-main {
  flex:1; display:flex; flex-direction:column;
  align-items:center; padding:12px 16px 0;
  overflow-y:auto;
}

/* Hissan Canvas Area */
.hissan-wrap {
  width:100%; max-width:400px; margin:0 auto 8px;
}
.hissan-toolbar {
  display:flex; align-items:center; justify-content:space-between;
  margin-bottom:8px; padding:0 4px;
}
.pen-picker { display:flex; gap:6px; }
.pen-dot {
  width:30px; height:30px; border-radius:50%;
  border:3px solid transparent; cursor:pointer;
  transition:all .15s; position:relative;
}
.pen-dot::after {
  content:''; position:absolute; inset:4px; border-radius:50%;
}
.pen-dot.c-black::after { background:#1d1d1f; }
.pen-dot.c-red::after { background:var(--danger); }
.pen-dot.c-blue::after { background:var(--apple-blue); }
.pen-dot.active { border-color:var(--text); transform:scale(1.1); }
.toolbar-actions { display:flex; gap:4px; }

.hissan-board {
  position:relative; width:100%; background:var(--card);
  border-radius:var(--radius); box-shadow:var(--shadow);
  overflow:hidden; border:1.5px solid var(--border-light);
}
.hissan-nums {
  position:relative; z-index:1; pointer-events:none;
  display:flex; flex-direction:column; align-items:flex-end;
  padding:44px 48px 16px;
  font-family:'SF Mono','Courier New',monospace;
  font-size:72px; font-weight:700; line-height:1.25;
  letter-spacing:10px; color:var(--text);
  user-select:none;
}
.hissan-op-row {
  display:flex; width:100%; justify-content:space-between; align-items:center;
}
.hissan-op { color:var(--apple-blue); }
.hissan-line {
  width:100%; height:3px; background:var(--near-black);
  margin-top:8px; border-radius:2px;
}
.hissan-answer-space { min-height:88px; }
.hissan-canvas {
  position:absolute; top:0; left:0; width:100%; height:100%;
  z-index:2; touch-action:none; cursor:crosshair;
}
.hissan-hint {
  position:absolute; top:14px; left:50%; transform:translateX(-50%);
  font-size:11px; color:var(--text-muted); pointer-events:none; z-index:0;
  white-space:nowrap;
}

/* Answer Input */
.answer-section {
  width:100%; max-width:400px; margin:0 auto;
}
.answer-box {
  display:flex; align-items:center; justify-content:center; gap:8px;
  background:var(--card); border:1.5px solid var(--border);
  border-radius:var(--radius-sm); padding:10px 20px;
  margin-bottom:8px; min-height:50px;
  transition:border-color .2s;
}
.answer-box.focus { border-color:var(--apple-blue); }
.answer-label { font-size:15px; color:var(--text-muted); font-weight:500; }
.answer-val { font-size:28px; font-weight:600; min-width:40px; text-align:center; letter-spacing:-.02em; }
.answer-cursor {
  width:2px; height:28px; background:var(--apple-blue);
  animation:blink 1s step-end infinite; margin-left:-4px;
}
@keyframes blink { 50%{opacity:0} }

.numpad-grid {
  display:grid; grid-template-columns:repeat(3,1fr); gap:6px;
  margin-bottom:8px;
}
.numpad-key {
  background:var(--card); border:1px solid var(--border-light);
  border-radius:var(--radius-sm); font-family:var(--font);
  font-size:24px; font-weight:500; padding:12px;
  cursor:pointer; transition:all .1s;
  display:flex; align-items:center; justify-content:center;
  color:var(--near-black); box-shadow:var(--shadow-sm);
}
.numpad-key:active { background:var(--apple-blue); color:#fff; border-color:var(--apple-blue); transform:scale(.95); box-shadow:none; }
.numpad-key.span2 { grid-column:span 2; }
.numpad-key.del { color:var(--danger); font-size:14px; font-weight:600; }
.numpad-key.del svg { width:20px; height:20px; stroke:var(--danger); }
.submit-btn-wrap { padding-bottom:max(12px, var(--safe-bottom)); }

/* Result Overlay */
.overlay {
  position:absolute; inset:0; z-index:100;
  display:flex; align-items:center; justify-content:center; flex-direction:column;
  background:rgba(0,0,0,.5); backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  opacity:0; pointer-events:none; transition:opacity .25s;
}
.overlay.show { opacity:1; pointer-events:auto; }
.overlay-card {
  background:var(--card); border-radius:20px; padding:36px;
  text-align:center; box-shadow:var(--shadow-lg);
  transform:scale(.88); transition:transform .3s cubic-bezier(.34,1.56,.64,1);
  max-width:300px; width:90%; border:1px solid var(--border-light);
}
.overlay.show .overlay-card { transform:scale(1); }
.overlay-icon { margin-bottom:16px; }
.overlay-icon svg { width:72px; height:72px; }
.overlay-icon.correct svg { stroke:var(--success); }
.overlay-icon.wrong svg { stroke:var(--danger); }
.overlay-title { font-size:22px; font-weight:600; margin-bottom:4px; letter-spacing:-.025em; }
.overlay-sub { font-size:15px; color:var(--text-secondary); margin-bottom:20px; }
.overlay-tap { font-size:13px; color:var(--text-muted); }

/* ===============================================
   Result Screen
   =============================================== */
#screenResult { align-items:center; justify-content:center; text-align:center; }
.result-inner { max-width:380px; width:100%; padding:24px; }
.result-ring {
  width:160px; height:160px; margin:0 auto 24px;
  position:relative; display:flex; align-items:center; justify-content:center;
}
.result-ring svg { position:absolute; inset:0; transform:rotate(-90deg); }
.result-ring-text { font-size:48px; font-weight:600; color:var(--apple-blue); z-index:1; letter-spacing:-.04em; }
.result-ring-text small { font-size:18px; color:var(--text-muted); }
.result-title { font-size:22px; font-weight:600; margin-bottom:4px; letter-spacing:-.025em; }
.result-subtitle { font-size:14px; color:var(--text-secondary); margin-bottom:28px; }
.result-stats {
  display:grid; grid-template-columns:1fr 1fr; gap:10px; margin-bottom:28px;
}
.result-stat {
  background:var(--bg); border-radius:var(--radius-sm); padding:14px;
  border:1px solid var(--border-light);
}
.result-stat-num { font-size:24px; font-weight:600; color:var(--text); letter-spacing:-.03em; }
.result-stat-label { font-size:12px; color:var(--text-muted); margin-top:2px; }
.result-actions { display:flex; flex-direction:column; gap:8px; }

/* ===============================================
   History / Records
   =============================================== */
.parent-banner {
  margin:20px; background:var(--bg);
  border-radius:var(--radius); padding:20px; border:1px solid var(--border-light);
}
.parent-banner h3 { font-size:14px; font-weight:500; color:var(--text-secondary); margin-bottom:14px; display:flex; align-items:center; gap:6px; }
.parent-banner h3 svg { width:15px; height:15px; stroke:var(--text-muted); }
.stats-row { display:grid; grid-template-columns:repeat(4,1fr); gap:8px; }
.stat-box {
  background:var(--card); border-radius:var(--radius-sm); padding:12px 8px;
  text-align:center; border:1px solid var(--border-light);
}
.stat-val { font-size:20px; font-weight:600; color:var(--apple-blue); letter-spacing:-.03em; }
.stat-lbl { font-size:10px; color:var(--text-muted); margin-top:2px; }

.week-heatmap {
  display:flex; gap:6px; justify-content:center; margin:16px 20px 12px;
}
.heatmap-day {
  flex:1; max-width:48px; text-align:center;
}
.heatmap-day .day-label { font-size:10px; color:var(--text-muted); margin-bottom:4px; }
.heatmap-day .day-block {
  height:32px; border-radius:6px; background:var(--border-light);
  display:flex; align-items:center; justify-content:center;
  font-size:10px; font-weight:600; color:#fff;
}
.heatmap-day .day-block.l1 { background:#c2d9f7; color:var(--primary-dark); }
.heatmap-day .day-block.l2 { background:#80b3ee; color:#fff; }
.heatmap-day .day-block.l3 { background:#3a8edf; color:#fff; }
.heatmap-day .day-block.l4 { background:#0071e3; color:#fff; }

.history-section-title {
  font-size:12px; font-weight:600; color:var(--text-muted);
  text-transform:uppercase; letter-spacing:.06em;
  padding:12px 20px 8px;
}
.history-list { padding:0 20px 20px; display:flex; flex-direction:column; gap:8px; }
.history-row {
  background:var(--card); border-radius:var(--radius-sm); padding:14px 16px;
  display:flex; align-items:center; justify-content:space-between;
  border:1px solid var(--border-light);
}
.history-row-left .h-date { font-size:12px; color:var(--text-muted); }
.history-row-left .h-unit { font-size:14px; font-weight:600; margin-top:1px; letter-spacing:-.01em; }
.history-row-right { display:flex; align-items:center; gap:8px; }
.h-score { font-size:18px; font-weight:600; color:var(--apple-blue); letter-spacing:-.02em; }
.h-score.perfect { color:var(--success); }
.h-rate-ring {
  width:36px; height:36px; position:relative;
  display:flex; align-items:center; justify-content:center;
}
.h-rate-ring svg { position:absolute; inset:0; transform:rotate(-90deg); }
.h-rate-ring span { font-size:10px; font-weight:700; z-index:1; }

/* ===============================================
   Charts（正解率推移・単元別習熟度）
   =============================================== */
.chart-wrap {
  margin:0 20px 12px;
  background:var(--card);
  border:1px solid var(--border-light);
  border-radius:var(--radius);
  padding:16px;
  position:relative;
}
.chart-wrap canvas {
  width:100% !important;
  display:block;
}
.chart-empty {
  text-align:center;
  padding:32px 0;
  color:var(--text-muted);
  font-size:13px;
}

/* 単元別習熟度 */
.mastery-chart { margin:0 20px 12px; display:flex; flex-direction:column; gap:8px; }
.mastery-row {
  background:var(--card);
  border:1px solid var(--border-light);
  border-radius:var(--radius-sm);
  padding:10px 14px;
}
.mastery-row-top { display:flex; align-items:center; justify-content:space-between; margin-bottom:6px; }
.mastery-label { font-size:13px; font-weight:600; letter-spacing:-.01em; flex:1; min-width:0; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.mastery-badge {
  font-size:10px; font-weight:700; padding:2px 7px; border-radius:20px;
  background:#e2e8f0; color:var(--text-muted); margin-left:8px; flex-shrink:0;
}
.mastery-badge.great { background:#d1fae5; color:#059669; }
.mastery-badge.good  { background:#dbeafe; color:#2563eb; }
.mastery-badge.ok    { background:#fef9c3; color:#d97706; }
.mastery-badge.weak  { background:#fee2e2; color:#dc2626; }
.mastery-bar-wrap { position:relative; }
.mastery-bar-bg {
  width:100%; height:8px; border-radius:4px;
  background:var(--border-light); overflow:hidden;
}
.mastery-bar-fill {
  height:8px; border-radius:4px;
  background:var(--primary);
  transition:width .4s ease;
}
.mastery-bar-fill.great { background:#10b981; }
.mastery-bar-fill.good  { background:#3b82f6; }
.mastery-bar-fill.ok    { background:#f59e0b; }
.mastery-bar-fill.weak  { background:#ef4444; }
.mastery-meta { display:flex; justify-content:space-between; margin-top:4px; }
.mastery-pct { font-size:11px; font-weight:700; }
.mastery-sub { font-size:11px; color:var(--text-muted); }

/* ===============================================
   Responsive
   =============================================== */
@media (max-width:400px) {
  .hissan-nums { font-size:56px; padding:36px 36px 12px; letter-spacing:6px; }
  .numpad-key { padding:10px; font-size:22px; }
  .lp-price-amount { font-size:44px; }
}
@media (min-width:768px) {
  .hissan-nums { font-size:88px; letter-spacing:14px; }
}

/* ===== Confetti ===== */
.confetti-piece {
  position:absolute; z-index:200; pointer-events:none;
  width:8px; height:16px; border-radius:2px;
  animation:confettiFall 2.5s ease-out forwards;
}
@keyframes confettiFall {
  0% { transform:translateY(0) rotate(0deg); opacity:1; }
  100% { transform:translateY(100vh) rotate(720deg); opacity:0; }
}