/* 匿名台南共用樣式：顏色、字型、版面基礎。各頁自己的樣式寫在該頁。 */
:root {
  --bg: #f6efe6;          /* 府城磚牆灰白 */
  --surface: #fffaf3;
  --ink: #2a1f1c;
  --muted: #7a6a62;
  --line: #e2d3c4;
  --flame: #d8432b;       /* 鳳凰花 */
  --flame-ink: #fff6ef;
  --brick: #9b3a2a;       /* 赤崁樓紅磚 */
  --sea: #1f5d73;         /* 安平海 */
  --ok: #2f7a4f;
  --warn: #b5651d;
  --font-display: "Noto Serif TC", "Songti TC", "PMingLiU", serif;
  --font-body: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1b1514; --surface: #261d1b; --ink: #f3e9e1; --muted: #b3a197; --line: #3d302c;
    --flame: #f0634a; --flame-ink: #1b1514; --brick: #e07a63; --sea: #6fb3cc; --ok: #6cc28f; --warn: #e6a15a;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #1b1514; --surface: #261d1b; --ink: #f3e9e1; --muted: #b3a197; --line: #3d302c;
  --flame: #f0634a; --flame-ink: #1b1514; --brick: #e07a63; --sea: #6fb3cc; --ok: #6cc28f; --warn: #e6a15a;
  color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.6 var(--font-body);
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
  padding-block: max(28px, env(safe-area-inset-top, 0px)) max(24px, env(safe-area-inset-bottom, 0px));
}
a { color: inherit; }
:focus-visible { outline: 3px solid var(--sea); outline-offset: 2px; }

.wrap { max-width: 460px; margin: 0 auto; display: grid; gap: 28px; }
section { display: grid; gap: 12px; }
h2 {
  margin: 0;
  display: flex; align-items: baseline; justify-content: space-between; gap: 8px;
  font: 700 18px/1.3 var(--font-display);
  letter-spacing: .04em;
}
h2 .meta { font: 400 12px/1 var(--font-body); color: var(--muted); letter-spacing: 0; }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 18px; }
.source { margin: 0; font-size: 12px; color: var(--muted); }
.source a { color: var(--sea); }

/* 子頁共用頁首 */
.page-head { display: grid; gap: 6px; }
.page-head .back { font-size: 13.5px; color: var(--muted); text-decoration: none; justify-self: start; }
.page-head .back:hover { color: var(--ink); }
.page-head h1 { margin: 0; font: 900 30px/1.2 var(--font-display); letter-spacing: .06em; }

/* 按鈕 */
.btn {
  font: 700 15px/1 var(--font-body); cursor: pointer;
  padding: 12px 20px; border-radius: 12px;
  border: 1.5px solid var(--ink); background: var(--surface); color: var(--ink);
  box-shadow: 2px 2px 0 var(--ink);
}
.btn:active { transform: translate(2px, 2px); box-shadow: none; }
.btn.primary { background: var(--flame); color: var(--flame-ink); }
.btn:disabled { opacity: .5; cursor: default; transform: none; box-shadow: 2px 2px 0 var(--ink); }
.btn.small { font-size: 13px; padding: 7px 12px; border-radius: 9px; box-shadow: none; border-width: 1px; border-color: var(--line); }
.btn.small:active { transform: none; }

/* 表單 */
label { font-weight: 700; font-size: 14px; }
textarea, input[type="password"], input[type="text"] {
  width: 100%; font: 16px/1.6 var(--font-body); color: var(--ink);
  background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 12px;
}
textarea:focus, input:focus { outline: 2px solid var(--sea); outline-offset: 0; border-color: transparent; }
.msg { margin: 0; font-size: 14px; min-height: 1.4em; }
.msg.err { color: var(--flame); }
.msg.ok { color: var(--ok); }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }