:root {
  --bg: #f6f5f2;
  --surface: #ffffff;
  --text: #1d1c1a;
  --muted: #6b6862;
  --border: #ddd9d2;
  --accent: #0f6b5c;
  --accent-strong: #0a4f44;
  --accent-soft: #e2f1ed;
  --danger: #9b2c2c;
  --danger-soft: #fdecec;
  --radius: 14px;
  --shadow: 0 1px 2px rgb(0 0 0 / 4%), 0 8px 24px rgb(0 0 0 / 4%);
  font-family: system-ui, -apple-system, "Segoe UI", "Noto Sans TC",
    "PingFang TC", "Microsoft JhengHei", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141514;
    --surface: #1d1f1e;
    --text: #edebe6;
    --muted: #a9a59d;
    --border: #33362f;
    --accent: #63c7b1;
    --accent-strong: #8adcc9;
    --accent-soft: #21332e;
    --danger: #f1a1a1;
    --danger-soft: #3a2323;
    --shadow: none;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  font-size: 16px;
}

a { color: var(--accent); }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--accent-soft);
  border-radius: 6px;
  padding: 0.1em 0.35em;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: 880px;
  margin: 0 auto;
  padding: 1rem 1rem 0.5rem;
}

.brand {
  color: var(--text);
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
  letter-spacing: 0.04em;
}

.site-nav { display: flex; align-items: center; gap: 0.75rem; }
.who { color: var(--muted); font-size: 0.9rem; }
.inline-form { display: inline; }

.link-button {
  background: none;
  border: 0;
  color: var(--accent);
  font: inherit;
  padding: 0.5rem 0.25rem;
  cursor: pointer;
  text-decoration: underline;
}

.container {
  max-width: 880px;
  margin: 0 auto;
  padding: 0.75rem 1rem 3rem;
  display: grid;
  gap: 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.narrow { max-width: 440px; margin-inline: auto; width: 100%; }
.center { text-align: center; }

h1 { font-size: 1.5rem; line-height: 1.25; margin: 0 0 0.5rem; }
h2 { font-size: 1.15rem; margin: 0 0 0.5rem; }

.eyebrow {
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 0 0 0.25rem;
}

.muted { color: var(--muted); }
.hint { color: var(--muted); font-size: 0.85rem; margin: 0; }

.stack { display: grid; gap: 0.55rem; margin-top: 1rem; }

label { font-weight: 600; font-size: 0.92rem; }

input[type="tel"],
input[type="password"],
input[type="file"] {
  width: 100%;
  min-height: 44px;
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
  font-size: 16px;
}

input[type="file"] { padding: 0.5rem; }

input:focus-visible,
button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.button {
  display: inline-block;
  min-height: 44px;
  padding: 0.65rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}

.button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

.button.primary:hover { background: var(--accent-strong); }

.alert {
  border-radius: 10px;
  padding: 0.7rem 0.85rem;
  margin: 0.75rem 0;
  font-size: 0.92rem;
}

.alert-error {
  background: var(--danger-soft);
  color: var(--danger);
  border: 1px solid color-mix(in srgb, var(--danger) 25%, transparent);
}

.alert-ok {
  background: var(--accent-soft);
  color: var(--accent-strong);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
  margin-top: 0.75rem;
}

.photo {
  display: block;
  overflow: hidden;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg);
  aspect-ratio: 1 / 1;
}

.photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.site-footer {
  color: var(--muted);
  text-align: center;
  font-size: 0.8rem;
  padding: 0 1rem 2rem;
}

@media (min-width: 600px) {
  .photo-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.8rem; }
  h1 { font-size: 1.7rem; }
  .card { padding: 1.5rem; }
}

@media (min-width: 900px) {
  .photo-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}