:root {
  --bg: #fff8ee;
  --card: #ffffff;
  --ink: #3b2a1a;
  --muted: #8a7560;
  --accent: #c8742b;
  --accent-ink: #ffffff;
  --line: #efe2cf;
  --danger: #b3382c;
  --radius: 16px;
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; background: var(--bg); color: var(--ink);
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  font-size: 17px; line-height: 1.6; }
#app { max-width: 560px; margin: 0 auto; padding: 16px 16px calc(88px + env(safe-area-inset-bottom)); min-height: 100vh; }
h1 { font-size: 1.5rem; margin: 8px 0 12px; }
h2 { font-size: 1.15rem; margin: 20px 0 8px; }
p { margin: 0 0 10px; }
a { color: var(--accent); }
.muted { color: var(--muted); font-size: .9rem; }
.loading { text-align: center; color: var(--muted); margin-top: 30vh; }
.back { background: none; border: 0; color: var(--accent); font-size: 1rem; padding: 4px 0; cursor: pointer; }

/* 底部導覽 */
#nav { position: fixed; left: 0; right: 0; bottom: 0; display: flex; justify-content: space-around;
  background: var(--card); border-top: 1px solid var(--line); padding: 6px 0 calc(6px + env(safe-area-inset-bottom)); z-index: 10; }
#nav[hidden] { display: none; }
#nav a { flex: 1; text-align: center; text-decoration: none; color: var(--muted); font-size: .78rem; padding: 4px 0; }
#nav a .ico { display: block; font-size: 1.35rem; line-height: 1.2; }
#nav a.on { color: var(--accent); font-weight: 700; }

/* 元件 */
.btn { display: inline-block; border: 0; border-radius: 999px; padding: 12px 20px; font-size: 1rem; cursor: pointer;
  background: var(--accent); color: var(--accent-ink); text-decoration: none; text-align: center; }
.btn.ghost { background: transparent; color: var(--accent); border: 1.5px solid var(--accent); }
.btn.danger { background: transparent; color: var(--danger); border: 1.5px solid var(--danger); }
.btn.block { display: block; width: 100%; }
.btn[disabled] { opacity: .5; }
.row { display: flex; gap: 10px; flex-wrap: wrap; margin: 12px 0; }
.row > * { flex: 1; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; margin: 8px 0 14px; }
.chip { border: 1.5px solid var(--line); background: var(--card); color: var(--ink); border-radius: 999px;
  padding: 7px 14px; font-size: .95rem; text-decoration: none; cursor: pointer; }
.chip.on { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.list { display: grid; gap: 10px; }
.item { display: block; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px 16px; text-decoration: none; color: var(--ink); }
.item .t { font-weight: 700; }
.item .s { color: var(--muted); font-size: .9rem; margin-top: 2px; white-space: pre-line; }
.badge { display: inline-block; font-size: .72rem; padding: 1px 8px; border-radius: 999px; background: #f6e3c8; color: #7a4a14; margin-left: 6px; vertical-align: middle; }
.badge.vip { background: #3b2a1a; color: #ffd98a; }

/* 表單 */
label { display: block; font-weight: 600; margin: 14px 0 6px; }
input[type=text], input[type=email], input[type=password], textarea, select {
  width: 100%; font: inherit; padding: 12px 14px; border: 1.5px solid var(--line); border-radius: 12px; background: #fff; color: var(--ink); }
textarea { min-height: 120px; resize: vertical; }
.seg { display: flex; border: 1.5px solid var(--accent); border-radius: 999px; overflow: hidden; }
.seg label { flex: 1; margin: 0; text-align: center; padding: 0; font-weight: 600; cursor: pointer; color: var(--accent); }
.seg input { display: none; }
.seg input:checked + span { background: var(--accent); color: var(--accent-ink); }
.seg label span { display: block; padding: 10px 0; }
.swatches { display: flex; gap: 10px; flex-wrap: wrap; }
.sw { width: 44px; height: 44px; border-radius: 50%; border: 3px solid transparent; cursor: pointer; }
.sw.on { border-color: var(--accent); }
.msg { margin: 10px 0; padding: 10px 12px; border-radius: 10px; background: #fdecea; color: var(--danger); }
.msg.ok { background: #e8f5e9; color: #1b5e20; }

/* 小卡預覽 */
.cardprev { width: 100%; border-radius: 18px; box-shadow: 0 6px 24px rgba(80,50,10,.15); display: block; background: #fff; }
.daily { border-radius: 20px; padding: 24px 20px; margin: 8px 0 16px; text-align: center; box-shadow: 0 6px 24px rgba(80,50,10,.12);
  background: linear-gradient(160deg, #fff1d6, #ffd9a8); color: #4a2f14; }
.daily .body { font-size: 1.2rem; line-height: 1.8; white-space: pre-line; }
.daily .ref { margin-top: 12px; font-size: .95rem; opacity: .75; }

/* 登入 */
.auth { margin-top: 8vh; text-align: center; }
.auth .logo { width: 84px; height: 84px; border-radius: 20px; }
.auth form { text-align: left; margin-top: 16px; }

/* 歌曲 */
.lyrics { white-space: pre-line; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; }
audio { width: 100%; margin: 8px 0; }

#toast { position: fixed; left: 50%; bottom: calc(90px + env(safe-area-inset-bottom)); transform: translateX(-50%) translateY(20px);
  background: #3b2a1a; color: #fff; padding: 10px 18px; border-radius: 999px; opacity: 0; pointer-events: none; transition: .25s; z-index: 20; font-size: .95rem; }
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }