/* 婚禮互動系統 - 共用樣式 */

:root {
  --rose-gold: #B76E79;
  --rose-gold-light: #d4a0a7;
  --ivory: #FFFFF0;
  --gold: #D4AF37;
  --gold-light: #e8d48b;
  --dark: #333;
  --gray: #666;
  --light-gray: #eee;
  --danger: #d9534f;
  --danger-hover: #c9302c;
  --success: #5cb85c;
  --border-radius: 8px;
}

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

body {
  font-family: "Segoe UI", "Noto Sans TC", sans-serif;
  background-color: var(--ivory);
  color: var(--dark);
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

/* Skip link for keyboard navigation */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 999;
  padding: 8px 16px;
  background: var(--rose-gold);
  color: #fff;
  text-decoration: none;
  border-radius: 0 0 var(--border-radius) 0;
}
.skip-link:focus {
  left: 0;
}

/* sr-only: visually hidden but accessible to screen readers */
.sr-only:not(:focus):not(:active) {
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  height: 1px;
  overflow: hidden;
  position: absolute;
  white-space: nowrap;
  width: 1px;
}

/* Header */
header {
  background: linear-gradient(135deg, var(--rose-gold), var(--rose-gold-light));
  color: #fff;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
header h1 {
  margin: 0;
  font-size: 1.4rem;
}
header nav a {
  color: #fff;
  text-decoration: none;
  margin-left: 16px;
  font-size: 0.9rem;
  opacity: 0.85;
}
header nav a:hover,
header nav a:focus {
  opacity: 1;
  text-decoration: underline;
}

/* Main container */
main {
  max-width: 960px;
  margin: 24px auto;
  padding: 0 16px;
}

/* Section headings */
h2 {
  color: var(--rose-gold);
  border-bottom: 2px solid var(--gold);
  padding-bottom: 8px;
  font-size: 1.3rem;
}

/* Cards */
.card {
  background: #fff;
  border-radius: var(--border-radius);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  padding: 20px 24px;
  margin-bottom: 24px;
}
.card h3 {
  margin-top: 0;
  font-size: 1.1rem;
  color: var(--dark);
}

/* Form layout */
.form-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-end;
  margin-bottom: 16px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray);
}
.form-group input,
.form-group select,
.form-group textarea {
  padding: 8px 12px;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 0.95rem;
  min-width: 100px;
  font-family: inherit;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: 2px solid var(--rose-gold);
  outline-offset: 1px;
  border-color: var(--rose-gold);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border: none;
  border-radius: 4px;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background-color 0.2s, box-shadow 0.2s;
  font-weight: 500;
}
.btn:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 2px;
}
.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.btn-primary {
  background-color: var(--rose-gold);
  color: #fff;
}
.btn-primary:hover:not(:disabled) {
  background-color: #a45e68;
}
.btn-danger {
  background-color: var(--danger);
  color: #fff;
}
.btn-danger:hover:not(:disabled) {
  background-color: var(--danger-hover);
}
.btn-secondary {
  background-color: var(--light-gray);
  color: var(--dark);
}
.btn-secondary:hover:not(:disabled) {
  background-color: #ddd;
}

/* Table */
.table-wrap {
  overflow-x: auto;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--light-gray);
}
th {
  background: #f9f6f0;
  color: var(--gray);
  font-weight: 600;
  white-space: nowrap;
}
tr:hover td {
  background: #fdfbf5;
}

/* Alerts */
.alert {
  padding: 12px 16px;
  border-radius: 4px;
  margin-bottom: 16px;
  font-size: 0.9rem;
}
.alert[hidden] { display: none; }
.alert-success { background: #dff0d8; color: #3c763d; border: 1px solid #d6e9c6; }
.alert-error { background: #f2dede; color: #a94442; border: 1px solid #ebccd1; }
.alert-info { background: #d9edf7; color: #31708f; border: 1px solid #bce8f1; }

/* Loading & empty states */
.loading {
  text-align: center;
  padding: 20px;
  color: var(--gray);
}
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--gray);
}

.hidden { display: none !important; }

/* Responsive */
@media (max-width: 600px) {
  header {
    flex-direction: column;
    align-items: flex-start;
  }
  header nav a {
    margin-left: 0;
    margin-right: 12px;
  }
  .form-row {
    flex-direction: column;
  }
}