:root {
  color-scheme: light;
  --color-primary: #214f43;
  --color-primary-strong: #173c33;
  --color-secondary: #557a66;
  --color-accent: #d3a94f;
  --color-bg: #f5f4ef;
  --color-surface: #fff;
  --color-surface-soft: #f8f8f4;
  --color-text: #23332d;
  --color-muted: #718078;
  --color-border: #e7e9e3;
  --color-danger: #a74b43;
  --font-serif: 'Noto Serif TC', 'PMingLiU', serif;
  --font-sans: 'Noto Sans TC', 'Microsoft JhengHei', sans-serif;
  --radius: 16px;
  --shadow-card: 0 12px 32px rgba(34, 55, 45, 0.06);
}

* { box-sizing: border-box; }
html { min-width: 320px; scroll-behavior: smooth; }
body {
  min-height: 100vh;
  margin: 0;
  font-family: var(--font-sans);
  background:
    radial-gradient(ellipse at 12% 0%, rgba(211, 169, 79, 0.08), transparent 30rem),
    var(--color-bg);
  color: var(--color-text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
button, input, select, textarea { font: inherit; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3, .site-title { color: var(--color-primary-strong); }
a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-secondary); }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid rgba(211, 169, 79, 0.8); outline-offset: 3px; }

.skip-link {
  position: absolute;
  z-index: 100;
  top: 8px;
  left: 8px;
  padding: 10px 14px;
  transform: translateY(-160%);
  border-radius: 8px;
  background: var(--color-primary-strong);
  color: #fff;
}
.skip-link:focus { transform: translateY(0); }

#app-header {
  position: sticky;
  z-index: 50;
  top: 0;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(35, 51, 45, 0.08);
  backdrop-filter: blur(14px);
}
.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(1120px, calc(100% - 48px));
  min-height: 76px;
  margin: 0 auto;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--color-primary-strong);
  font-weight: 700;
  letter-spacing: 0.02em;
}
.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 13px;
  background: var(--color-primary);
  color: white;
  font-family: var(--font-serif);
  font-size: 1.2rem;
}
.brand small {
  display: block;
  color: var(--color-muted);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
}
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  padding: 9px 14px;
  border-radius: 999px;
  color: #52635a;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background-color 160ms ease, color 160ms ease;
}
.nav-links a:hover, .nav-links a[aria-current="page"] {
  background: #edf2ee;
  color: var(--color-primary-strong);
}
.nav-links a.nav-login {
  margin-left: 5px;
  background: var(--color-primary);
  color: #fff;
}
.nav-links a.nav-login:hover { background: var(--color-primary-strong); }
.nav-user { padding: 0 6px; color: var(--color-muted); font-size: 0.84rem; }
.nav-logout {
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: transparent;
  color: var(--color-primary);
  cursor: pointer;
  font-size: 0.84rem;
}
.nav-logout:hover { background: var(--color-surface-soft); }

.page { width: min(1120px, calc(100% - 48px)); margin: 0 auto; }
.hero { padding: 56px 0 30px; text-align: center; }
.site-title { margin-bottom: 5px; font-family: var(--font-serif); font-size: clamp(2rem, 4vw, 2.8rem); }
.subtitle { margin: 0; color: var(--color-muted); }
.page-title { padding-top: 34px; font-family: var(--font-serif); font-size: 2rem; }

.login-card {
  position: relative;
  width: min(100%, 440px);
  margin: 48px auto;
  padding: 34px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}
.login-card h2 { margin-bottom: 22px; text-align: center; }
.login-card h1 { margin-bottom: 7px; text-align: center; font-size: 1.65rem; }
.form-intro, .form-help { color: var(--color-muted); font-size: 0.88rem; text-align: center; }
.form-intro { margin-bottom: 24px; }
.form-notice { margin: -5px 0 18px; color: var(--color-secondary); font-size: 0.84rem; text-align: center; }
.form-footnote { margin: 18px 0 4px; font-size: 0.9rem; text-align: center; }
.form-help { margin-bottom: 0; font-size: 0.8rem; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; margin-bottom: 7px; color: #40564a; font-size: 0.92rem; font-weight: 600; }
.form-group input {
  width: 100%;
  min-height: 48px;
  padding: 10px 13px;
  border: 1px solid #dfe4de;
  border-radius: 10px;
  background: #fcfcfa;
  color: var(--color-text);
  transition: border-color 160ms ease, box-shadow 160ms ease;
}
.form-group input:focus { border-color: var(--color-secondary); box-shadow: 0 0 0 3px rgba(85, 122, 102, 0.13); outline: none; }
.btn {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border: 0;
  border-radius: 10px;
  background: var(--color-primary);
  color: #fff;
  cursor: pointer;
  font-weight: 600;
  text-align: center;
  transition: background-color 160ms ease, transform 160ms ease;
}
.btn:hover { transform: translateY(-1px); background: var(--color-primary-strong); color: #fff; }
.login-card .btn { width: 100%; }
.stat-unit { color: var(--color-muted); font-size: 0.78rem; font-weight: 500; }
.announcement-author { margin-top: 12px; color: var(--color-muted); font-size: 0.78rem; }
.management-page { padding: 34px 0 0; }
.management-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.management-heading .page-title { margin: 0 0 8px; padding: 0; }
.management-heading .form-intro { margin: 0; text-align: left; }
.count-pill, .role-badge {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  padding: 6px 11px;
  border-radius: 999px;
  background: #edf3ee;
  color: var(--color-primary);
  font-size: 0.78rem;
  font-weight: 600;
}
.member-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 14px; }
.member-card { display: flex; min-width: 0; align-items: center; gap: 12px; padding: 16px; border: 1px solid var(--color-border); border-radius: 14px; background: var(--color-surface); box-shadow: var(--shadow-card); }
.member-avatar { display: grid; width: 42px; height: 42px; flex: 0 0 auto; place-items: center; border-radius: 50%; background: #edf3ee; color: var(--color-primary); font-weight: 700; }
.member-card h2, .admin-member h3 { margin: 0 0 3px; font-size: 0.94rem; }
.member-card p, .admin-member p { margin: 0; color: var(--color-muted); font-size: 0.8rem; }
.member-card .role-badge { margin-left: auto; }
.admin-section { margin-bottom: 20px; }
.admin-list { display: grid; }
.admin-row { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 15px 0; border-top: 1px solid var(--color-border); }
.admin-member { min-width: 0; }
.admin-actions { display: flex; flex: 0 0 auto; align-items: center; justify-content: flex-end; gap: 9px; }
.btn-small { min-height: 36px; padding: 7px 12px; border-radius: 8px; font-size: 0.82rem; }
.btn-secondary { background: #eef1ed; color: #46564c; }
.btn-secondary:hover { background: #e2e8e1; color: #263a2e; }
.btn:disabled, .nav-logout:disabled { cursor: wait; opacity: 0.65; }
.text-button { padding: 5px 3px; border: 0; background: transparent; color: var(--color-primary); cursor: pointer; font-size: 0.8rem; font-weight: 600; }
.text-button:hover { text-decoration: underline; }
.text-danger { color: var(--color-danger); }
.empty-state { padding: 18px 0; color: var(--color-muted); font-size: 0.9rem; }
.form-message { margin: 12px 0; padding: 10px 12px; border-radius: 9px; background: #f9eded; color: #8d3932; font-size: 0.86rem; }
.form-message[hidden] { display: none; }
.form-message.is-error { background: #f9eded; color: #8d3932; }
.form-message.is-success { background: #edf5ef; color: #315f42; }
.form-message.is-warning { background: #fff5df; color: #76520c; }
.setup-card .eyebrow { text-align: center; }
.setup-card .form-help { margin-top: 16px; }
.toast { padding: 12px 16px; border-radius: 10px; background: var(--color-primary); color: #fff; box-shadow: var(--shadow-card); }
.toast-error { background: var(--color-danger); }
.toast-warning { background: #76520c; }

#app-footer {
  width: min(1120px, calc(100% - 48px));
  margin: 70px auto 0;
  padding: 24px 0 32px;
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  text-align: center;
  font-size: 0.82rem;
}
#app-footer p { margin: 3px 0; }
#toast-region { position: fixed; z-index: 100; right: 20px; bottom: 20px; }
.error-page { display: grid; min-height: 75vh; align-content: center; justify-items: center; text-align: center; }
.error-title { margin-bottom: 8px; font-family: var(--font-serif); font-size: clamp(2rem, 5vw, 3.5rem); }
.error-subtitle { margin-bottom: 24px; color: var(--color-muted); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; }
}
@media (max-width: 560px) {
  .management-heading { align-items: flex-start; flex-direction: column; gap: 12px; }
  .admin-row { align-items: flex-start; flex-direction: column; gap: 10px; }
  .admin-actions { justify-content: flex-start; flex-wrap: wrap; }
  .member-card .role-badge { padding: 5px 8px; font-size: 0.7rem; }
}