:root {
  --bg: #faf6f0;
  --card: #ffffff;
  --ink: #2b3a39;
  --muted: #6b7c7a;
  --line: #e4ddd0;
  --primary: #1f5f5b;
  --primary-dark: #174946;
  --primary-soft: #e6f0ee;
  --accent: #b98d4a;
  --danger: #b4452f;
  --radius: 16px;
  --shadow: 0 8px 30px rgba(31, 95, 91, 0.08);
  color-scheme: light;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  font-size: 17px;
  line-height: 1.75;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
[hidden] { display: none !important; }
.serif, h1, h2 { text-wrap: balance; font-family: "Noto Serif TC", "Songti TC", "PMingLiU", serif; }

/* ---- 頂部 ---- */
.topbar {
  position: sticky; top: 0; z-index: 10;
  background: rgba(250, 246, 240, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  padding-top: env(safe-area-inset-top);
}
.topbar-inner { max-width: 720px; margin: 0 auto; padding: 10px 20px; display: flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 30px; height: 30px; border-radius: 9px; background: var(--primary); color: #fff;
  display: grid; place-items: center; font-size: 17px; font-family: "Noto Serif TC", serif;
}
.brand-name { font-weight: 600; letter-spacing: 0.08em; color: var(--primary); }
.progress { max-width: 720px; margin: 0 auto; padding: 0 20px 10px; }
.progress-meta { display: flex; justify-content: space-between; font-size: 14px; color: var(--muted); margin-bottom: 6px; }
.progress-track { height: 6px; background: var(--line); border-radius: 99px; overflow: hidden; }
.progress-fill { height: 100%; width: 0; background: linear-gradient(90deg, var(--primary), #3d8a83); border-radius: 99px; transition: width 0.35s ease; }

/* ---- 版面 ---- */
.wrap { flex: 1; width: 100%; max-width: 720px; margin: 0 auto; padding: 28px 20px 40px; outline: none; }
.foot { text-align: center; color: var(--muted); font-size: 13px; padding: 20px 20px calc(24px + env(safe-area-inset-bottom)); }

.card {
  background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 32px 28px; border: 1px solid rgba(228, 221, 208, 0.7);
}
@media (max-width: 520px) { .card { padding: 24px 18px; } body { font-size: 16.5px; } }

/* ---- 歡迎頁 ---- */
.hero h1 { font-size: clamp(26px, 6vw, 34px); line-height: 1.35; margin: 0 0 10px; color: var(--primary-dark); letter-spacing: 0.02em; }
.hero .tagline { font-size: 19px; color: var(--accent); font-family: "Noto Serif TC", serif; margin: 0 0 24px; }
.hero p { margin: 0 0 14px; }
.hero .duration { background: var(--primary-soft); border-radius: 12px; padding: 14px 16px; font-size: 15px; color: var(--primary-dark); margin: 22px 0 26px; }

/* ---- 區塊標題 ---- */
.sec-no { display: inline-block; font-family: "Noto Serif TC", serif; color: var(--accent); font-size: 15px; letter-spacing: 0.2em; margin-bottom: 2px; }
.sec-title { font-size: clamp(23px, 5.4vw, 28px); margin: 0 0 6px; color: var(--primary-dark); }
.sec-intro { color: var(--muted); margin: 0 0 8px; }

/* ---- 題目 ---- */
.q { border: 0; padding: 0; margin: 28px 0 0; min-width: 0; }
.q-label { display: block; font-weight: 600; font-size: 18px; line-height: 1.55; padding: 0; margin-bottom: 4px; }
.req { color: var(--danger); margin-left: 4px; }
.q-help { color: var(--muted); font-size: 14.5px; margin: 0 0 10px; }
.q-error { color: var(--danger); font-size: 14.5px; margin: 8px 0 0; display: flex; gap: 6px; }
.q-error::before { content: "！"; font-weight: 700; }
.q.invalid .field, .q.invalid .choice span { border-color: var(--danger); }

.field {
  width: 100%; font: inherit; color: inherit; background: #fffdfa;
  border: 1.5px solid var(--line); border-radius: 12px; padding: 12px 14px; min-height: 50px;
  transition: border-color 0.15s, box-shadow 0.15s;
}
textarea.field { min-height: 120px; resize: vertical; line-height: 1.6; }
select.field { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none' stroke='%231f5f5b' stroke-width='2'%3E%3Cpath d='M1 1l5 5 5-5'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 16px center; padding-right: 40px; }
.field:focus-visible, .choice input:focus-visible + span, .btn:focus-visible {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(31, 95, 91, 0.18);
}
.field::placeholder { color: #a9b3b1; }

.birth { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 10px; }

/* 選項卡片 */
.choices { display: grid; gap: 10px; }
.choice { position: relative; display: block; cursor: pointer; }
.choice input { position: absolute; opacity: 0; inset: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; }
.choice span {
  display: flex; align-items: center; gap: 12px; min-height: 50px; padding: 11px 14px;
  background: #fffdfa; border: 1.5px solid var(--line); border-radius: 12px; transition: all 0.15s; line-height: 1.5;
}
.choice span::before {
  content: ""; flex: none; width: 22px; height: 22px; border: 2px solid #b9c4c2; background: #fff; transition: all 0.15s;
}
.choice.radio span::before { border-radius: 50%; }
.choice.check span::before { border-radius: 6px; }
.choice:hover span { border-color: #b9c9c6; }
.choice input:checked + span { background: var(--primary-soft); border-color: var(--primary); }
.choice.radio input:checked + span::before { border-color: var(--primary); background: radial-gradient(circle, var(--primary) 0 45%, #fff 50%); }
.choice.check input:checked + span::before {
  border-color: var(--primary); background: var(--primary)
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='white' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3.5 8.5l3 3 6-6.5'/%3E%3C/svg%3E") center / 14px no-repeat;
}
.other-input { margin-top: 10px; }

/* 重要程度矩陣 */
.matrix { display: grid; gap: 14px; }
.matrix-row { border: 1px solid var(--line); border-radius: 14px; padding: 14px; background: #fffdfa; margin: 0; min-width: 0; }
.matrix-row legend { padding: 0 6px; font-weight: 500; }
.pills { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-top: 6px; }
.pill { position: relative; display: block; cursor: pointer; }
.pill input { position: absolute; opacity: 0; inset: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; }
.pill span {
  display: grid; place-items: center; text-align: center; min-height: 46px; padding: 6px 4px; font-size: 14.5px; line-height: 1.3;
  background: #fff; border: 1.5px solid var(--line); border-radius: 10px; transition: all 0.15s;
}
.pill input:checked + span { background: var(--primary); border-color: var(--primary); color: #fff; font-weight: 600; }
.pill input:focus-visible + span { box-shadow: 0 0 0 4px rgba(31, 95, 91, 0.18); }
@media (max-width: 420px) { .pills { grid-template-columns: repeat(2, 1fr); } }

/* 同意 */
.consent-box { margin-top: 30px; }
.consent-box .choice span { background: #fbf6ea; border-color: #ead9b6; align-items: flex-start; }
.consent-box .choice span::before { margin-top: 2px; }
.consent-box .choice input:checked + span { background: var(--primary-soft); border-color: var(--primary); }

/* ---- 按鈕 ---- */
.nav { display: flex; gap: 12px; margin-top: 34px; }
.btn {
  font: inherit; font-weight: 600; letter-spacing: 0.08em; cursor: pointer; border-radius: 99px;
  padding: 14px 28px; min-height: 52px; border: 1.5px solid var(--primary); transition: all 0.15s;
}
.btn-primary { background: var(--primary); color: #fff; flex: 1; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-ghost { background: transparent; color: var(--primary); }
.btn-ghost:hover { background: var(--primary-soft); }
.btn[disabled] { opacity: 0.6; cursor: wait; }
.form-error { background: #fbeae6; color: var(--danger); border-radius: 12px; padding: 12px 14px; margin-top: 18px; }
.notice { background: #fbeae6; color: var(--danger); border-radius: 12px; padding: 14px 16px; }

/* ---- 完成頁 ---- */
.done { text-align: center; }
.done .seal { width: 72px; height: 72px; margin: 0 auto 18px; border-radius: 50%; background: var(--primary-soft); color: var(--primary); display: grid; place-items: center; }
.done h1 { font-size: clamp(24px, 6vw, 30px); margin: 0 0 12px; color: var(--primary-dark); }
.done p { margin: 0 0 10px; color: var(--ink); }

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.step { animation: rise 0.35s ease both; }
@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .step { animation: none; } .progress-fill { transition: none; } }