:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --accent: #06b6d4;
  --success: #16a34a;
  --radius: 16px;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --max-width: 720px;
}

body.age-8 {
  --bg: #fff7e6;
  --primary: #ff6b6b;
  --primary-dark: #e85555;
  --accent: #ffd93d;
  --radius: 24px;
  --font: 'Comic Sans MS', 'Segoe UI', sans-serif;
}

body.age-10 {
  --bg: #eef6ff;
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --accent: #22c55e;
  --radius: 18px;
}

body.age-14 {
  --bg: #f5f5f7;
  --primary: #334155;
  --primary-dark: #1e293b;
  --accent: #6366f1;
  --radius: 12px;
  --font: 'Segoe UI', system-ui, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  transition: background 0.3s ease;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 16px 64px;
}

header.top-bar {
  padding: 16px;
  text-align: center;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--primary-dark);
}

.card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
  margin-bottom: 20px;
}

h1 { font-size: 1.6rem; margin: 0 0 8px; }
h2 { font-size: 1.3rem; margin: 0 0 12px; }
p { line-height: 1.55; color: var(--text); }
.muted { color: var(--muted); font-size: 0.92rem; }

.age-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.age-card {
  background: var(--surface);
  border: 2px solid transparent;
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(0,0,0,0.06);
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.age-card:hover { transform: translateY(-3px); border-color: var(--primary); }
.age-card .emoji { font-size: 2.6rem; display: block; margin-bottom: 8px; }
.age-card h3 { margin: 4px 0; }

button, .btn {
  font-family: inherit;
  font-size: 1rem;
  border: none;
  border-radius: 999px;
  padding: 12px 26px;
  background: var(--primary);
  color: white;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.15s ease, transform 0.1s ease;
}
button:hover, .btn:hover { background: var(--primary-dark); }
button:active { transform: scale(0.97); }
button.secondary { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-row { display: flex; gap: 12px; margin-top: 20px; flex-wrap: wrap; }

input[type=text], input[type=email], input[type=password], input[type=number], textarea, select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1.5px solid #d1d5db;
  font-size: 1rem;
  font-family: inherit;
  margin-top: 6px;
}
label { font-weight: 600; font-size: 0.92rem; display: block; margin-top: 14px; }

.progress-wrap { margin-bottom: 20px; }
.progress-bar-bg { background: #e5e7eb; border-radius: 999px; height: 12px; overflow: hidden; }
.progress-bar-fill { background: var(--primary); height: 100%; transition: width 0.3s ease; }
.progress-label { font-size: 0.85rem; color: var(--muted); margin-top: 6px; text-align: right; }

.options-grid { display: grid; gap: 12px; margin-top: 16px; }
.option-btn {
  display: flex; align-items: center; gap: 14px;
  background: var(--surface); border: 2px solid #e5e7eb; border-radius: var(--radius);
  padding: 14px 18px; cursor: pointer; text-align: left; font-size: 1rem; color: var(--text);
  font-family: inherit; font-weight: 500;
}
.option-btn .icon { font-size: 1.8rem; }
.option-btn.selected { border-color: var(--primary); background: #eef2ff; }
body.age-8 .option-btn .icon { font-size: 2.6rem; }
body.age-8 .option-btn { font-size: 1.15rem; padding: 18px; }

.likert-scale { display: flex; justify-content: space-between; gap: 8px; margin-top: 18px; flex-wrap: wrap; }
.likert-opt {
  flex: 1; min-width: 60px; text-align: center; padding: 14px 6px; border-radius: 12px;
  border: 2px solid #e5e7eb; cursor: pointer; background: var(--surface); font-weight: 600;
}
.likert-opt.selected { border-color: var(--primary); background: #eef2ff; color: var(--primary-dark); }
.likert-labels { display: flex; justify-content: space-between; margin-top: 8px; font-size: 0.78rem; color: var(--muted); }

.creative-box { background: #fffbea; border: 2px dashed var(--accent); border-radius: var(--radius); padding: 20px; margin-top: 14px; }
.creative-box .check-row { display: flex; align-items: center; gap: 10px; margin-top: 14px; }
.creative-box input[type=checkbox] { width: 22px; height: 22px; }

.result-bars { display: flex; flex-direction: column; gap: 14px; margin-top: 10px; }
.result-bar-row .label-row { display: flex; justify-content: space-between; font-weight: 600; margin-bottom: 4px; }
.result-bar-bg { background: #e5e7eb; border-radius: 999px; height: 18px; overflow: hidden; }
.result-bar-fill { height: 100%; background: linear-gradient(90deg, var(--primary), var(--accent)); border-radius: 999px; }

.rec-block { border-top: 1px solid #e5e7eb; padding-top: 14px; margin-top: 14px; }
.rec-block h3 { color: var(--primary-dark); }
.disclaimer { font-size: 0.82rem; color: var(--muted); margin-top: 18px; }

table { width: 100%; border-collapse: collapse; margin-top: 14px; font-size: 0.92rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid #e5e7eb; }
th { color: var(--muted); font-weight: 600; }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 14px; margin-top: 16px; }
.stat-card { background: var(--surface); border-radius: 12px; padding: 16px; text-align: center; box-shadow: 0 2px 10px rgba(0,0,0,0.05); }
.stat-card .num { font-size: 1.7rem; font-weight: 700; color: var(--primary); }

.error-msg { color: #dc2626; font-weight: 600; margin-top: 10px; }
.link-btn { background: none; border: none; color: var(--primary); text-decoration: underline; cursor: pointer; font-weight: 600; padding: 0; }

footer.site-footer { text-align: center; color: var(--muted); font-size: 0.8rem; padding: 30px 16px; }

@media (max-width: 480px) {
  .container { padding: 16px 12px 48px; }
  h1 { font-size: 1.35rem; }
}