/* ===== 設計系統變數 & Reset ===== */
:root {
  --color-bg: #fafaf8;
  --color-surface: #ffffff;
  --color-border: #e8e4df;
  --color-text: #1a1714;
  --color-text-secondary: #6b6560;
  --color-text-muted: #9e9890;
  --color-primary: #2c2420;
  --color-primary-hover: #3d3330;
  --color-accent: #c8935a;
  --color-accent-light: #f5ebe0;
  --color-success: #3a7d44;
  --color-success-bg: #e8f5ea;
  --color-warning: #c47d1e;
  --color-warning-bg: #fef3e2;
  --color-error: #c0392b;
  --color-error-bg: #fdecea;
  --color-pending: #e67e22;
  --color-confirmed: #27ae60;
  --color-cancelled: #95a5a6;
  --color-completed: #2980b9;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,.12);

  --font-sans: 'Noto Sans TC', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --transition: 0.18s ease;
  --max-width: 1100px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

img { max-width: 100%; display: block; }
a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── 通用 Button ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  padding: .7rem 1.6rem;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
  white-space: nowrap;
}
.btn:disabled { opacity: .45; cursor: not-allowed; transform: none !important; }

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn--primary:not(:disabled):hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  transform: translateY(-1px);
}

.btn--secondary {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-border);
}
.btn--secondary:not(:disabled):hover {
  border-color: var(--color-primary);
  background: var(--color-accent-light);
}

.btn--icon {
  padding: .5rem .7rem;
  background: var(--color-border);
  border-color: var(--color-border);
  font-size: 1.1rem;
}
.btn--sm { padding: .4rem 1rem; font-size: .875rem; }

/* ── Site Header ─────────────────────────────────────────────────── */
.site-header {
  background: var(--color-primary);
  color: #fff;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.site-header__logo {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: .06em;
}
.site-header__sub {
  font-size: .8rem;
  opacity: .65;
  letter-spacing: .1em;
}

/* ── Container ───────────────────────────────────────────────────── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ── Toast 通知 ──────────────────────────────────────────────────── */
.sj-toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(2rem);
  background: var(--color-primary);
  color: #fff;
  padding: .75rem 1.5rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: .95rem;
  z-index: 9999;
  opacity: 0;
  transition: opacity .3s, transform .3s;
  pointer-events: none;
}
.sj-toast--visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.sj-toast--success { background: var(--color-success); }
.sj-toast--error   { background: var(--color-error); }
.sj-toast--info    { background: var(--color-primary); }

/* ── RWD ──────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .btn { padding: .65rem 1.2rem; }
}