/**
 * 결혼식 방명록 시스템 스타일시트
 * Simple, Clean, Responsive
 */

/* ========================================
   CSS Variables & Reset
   ======================================== */
:root {
  --primary-color: #4A90E2;
  --secondary-color: #E24A90;
  --success-color: #4CAF50;
  --danger-color: #F44336;
  --text-dark: #333;
  --text-medium: #666;
  --text-light: #999;
  --bg-light: #f5f5f5;
  --bg-white: #ffffff;
  --border-color: #e0e0e0;
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 8px rgba(0,0,0,0.15);
  --radius: 8px;
}

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

/* ========================================
   Base Styles
   ======================================== */
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  color: var(--text-dark);
  background: var(--bg-light);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-dark);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; margin-bottom: 1rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; }

p {
  margin-bottom: 1rem;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-block;
  padding: 12px 24px;
  font-size: 1rem;
  font-weight: 500;
  text-align: center;
  text-decoration: none;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-primary {
  background: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background: #3a7bc8;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: white;
  color: var(--text-dark);
  border: 2px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.btn-danger-outline {
  background: white;
  color: var(--danger-color);
  border: 2px solid var(--danger-color);
  padding: 8px 16px;
  font-size: 0.9rem;
}

.btn-danger-outline:hover {
  background: var(--danger-color);
  color: white;
}

.btn-text {
  background: transparent;
  color: var(--text-medium);
  padding: 8px 16px;
}

.btn-text:hover {
  color: var(--primary-color);
}

.btn-large {
  padding: 16px 32px;
  font-size: 1.1rem;
  min-width: 280px;
}

.button-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.button-group-vertical {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
}

/* ========================================
   Forms
   ======================================== */
.guest-form {
  background: white;
  padding: 32px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 24px;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--text-dark);
}

.required::after {
  content: " *";
  color: var(--danger-color);
}

input[type="text"],
input[type="tel"],
input[type="number"] {
  width: 100%;
  padding: 12px;
  font-size: 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius);
  transition: border-color 0.3s;
}

input:focus {
  outline: none;
  border-color: var(--primary-color);
}

/* 금액 입력 (1000단위) */
.amount-input-wrapper {
  display: flex;
  align-items: center;
  position: relative;
  width: 100%;
  border: 2px solid var(--border-color);
  border-radius: var(--radius);
  padding-right: 12px;
  transition: border-color 0.3s;
}

.amount-input-wrapper:focus-within {
  border-color: var(--primary-color);
}

.amount-input-wrapper input {
  flex: 1;
  border: none;
  padding: 12px;
  font-size: 1rem;
  width: auto;
}

.amount-input-wrapper input:focus {
  outline: none;
  border: none;
}

.amount-suffix {
  color: var(--text-light);
  font-size: 1rem;
  white-space: nowrap;
  user-select: none;
  pointer-events: none;
}

.help-text {
  display: block;
  margin-top: 6px;
  font-size: 0.85rem;
  color: var(--text-light);
}

.radio-group {
  display: flex;
  gap: 20px;
}

.radio-label {
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  padding: 12px 20px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius);
  transition: all 0.3s;
  position: relative;
  user-select: none;
}

.radio-label:hover {
  border-color: var(--primary-color);
}

.radio-label input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  margin: 0;
  cursor: pointer;
}

.radio-label input[type="radio"]:checked ~ span {
  color: var(--primary-color);
  font-weight: 600;
}

.radio-label input[type="radio"]:checked ~ span::before {
  content: '✓ ';
}

.radio-label:has(input[type="radio"]:checked) {
  border-color: var(--primary-color);
  background: rgba(74, 144, 226, 0.05);
}

/* ========================================
   Success Message
   ======================================== */
.success-message {
  background: white;
  padding: 48px 32px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.success-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
}

.success-icon {
  font-size: 4rem;
}

.hidden {
  display: none !important;
}

/* ========================================
   Headers
   ======================================== */
.page-header {
  text-align: center;
  margin-bottom: 40px;
  padding: 20px 0;
}

.page-header h1 {
  margin-bottom: 8px;
}

.subtitle {
  color: var(--text-medium);
  font-size: 1.1rem;
}

.hero-header {
  text-align: center;
  padding: 60px 0 40px;
}

.hero-title {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-medium);
}

/* ========================================
   Hero Section (Index Page)
   ======================================== */
.hero-main {
  max-width: 900px;
  margin: 0 auto;
}

.welcome-section {
  text-align: center;
  margin-bottom: 48px;
}

.welcome-text {
  font-size: 1.15rem;
  color: var(--text-medium);
  line-height: 1.8;
}

.features-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
  margin-bottom: 48px;
}

.feature-card {
  background: white;
  padding: 32px 24px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: transform 0.3s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-medium);
  font-size: 0.95rem;
  margin-bottom: 0;
}

.cta-section {
  margin-bottom: 48px;
}

.info-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}

.info-box {
  background: white;
  padding: 20px;
  border-radius: var(--radius);
  border-left: 4px solid var(--primary-color);
}

.info-box h4 {
  margin-bottom: 8px;
}

.info-box p {
  color: var(--text-medium);
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* ========================================
   Stats & Export Section (Simplified)
   ======================================== */
.stats-export-section-simple {
  background: white;
  padding: 20px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  margin-bottom: 20px;
}

/* 4개 통계 카드 그리드 */
.stats-grid-simple {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.stat-card-simple {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius);
  background: var(--bg-light);
}

.stat-card-simple .stat-icon {
  font-size: 2.5rem;
}

.stat-card-simple .stat-content h3 {
  font-size: 0.85rem;
  color: var(--text-medium);
  font-weight: 500;
  margin-bottom: 4px;
}

.stat-card-simple .stat-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 0;
}

.stat-card-simple .stat-label {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-left: 4px;
}

/* 백업 배지 */
.backup-badge-container {
  text-align: center;
  padding: 6px 0;
}

.backup-badge {
  display: inline-block;
  padding: 4px 12px;
  background: var(--bg-light);
  color: var(--primary-color);
  border-radius: 12px;
  font-size: 0.8rem;
}

/* 데이터 내보내기 */
.export-buttons {
  text-align: center;
  padding-top: 8px;
  border-top: 1px solid var(--border-color);
}

.export-buttons h3 {
  font-size: 0.85rem;
  margin-bottom: 8px;
  color: var(--text-medium);
}

.export-buttons .button-group {
  justify-content: center;
  gap: 8px;
}

.export-buttons .btn {
  padding: 8px 16px;
  font-size: 0.85rem;
}

/* ========================================
   Table Section
   ======================================== */
.table-section {
  background: white;
  padding: 32px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  margin-bottom: 40px;
}

.table-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.table-count {
  font-weight: 600;
  color: var(--text-medium);
}

.table-wrapper {
  overflow-x: auto;
}

.visitors-table {
  width: 100%;
  border-collapse: collapse;
}

.visitors-table thead {
  background: var(--bg-light);
}

.visitors-table th {
  padding: 12px;
  text-align: left;
  font-weight: 600;
  border-bottom: 2px solid var(--border-color);
}

.visitors-table td {
  padding: 12px;
  border-bottom: 1px solid var(--border-color);
}

.visitors-table tbody tr:hover {
  background: var(--bg-light);
}

.empty-message {
  text-align: center;
  color: var(--text-light);
  padding: 40px !important;
}

/* 삭제 버튼 */
.btn-delete {
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 1.2rem;
  padding: 4px 8px;
  transition: transform 0.2s;
}

.btn-delete:hover {
  transform: scale(1.2);
}

/* ========================================
   Backup Notification & Badge
   ======================================== */
.backup-notification {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--success-color);
  color: white;
  padding: 16px 24px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  z-index: 1000;
  animation: slideIn 0.3s ease-out;
}

.backup-content {
  display: flex;
  align-items: center;
  gap: 12px;
}

.backup-icon {
  font-size: 1.5rem;
}

.backup-text {
  font-size: 0.95rem;
}

.backup-badge {
  display: inline-block;
  margin-top: 8px;
  padding: 4px 12px;
  background: var(--bg-light);
  color: var(--primary-color);
  border-radius: 12px;
  font-size: 0.85rem;
}

@keyframes slideIn {
  from {
    transform: translateX(400px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* ========================================
   Pagination
   ======================================== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
  padding: 20px 0;
}

.pagination-btn {
  padding: 8px 12px;
  min-width: 40px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-dark);
  background: white;
  border: 2px solid var(--border-color);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s ease;
}

.pagination-btn:hover:not(:disabled) {
  border-color: var(--primary-color);
  color: var(--primary-color);
  background: rgba(74, 144, 226, 0.05);
}

.pagination-btn.active {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
  cursor: default;
}

.pagination-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.pagination-btn.disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

/* ========================================
   Footer
   ======================================== */
.page-footer {
  text-align: center;
  padding: 40px 0 20px;
}

.footer-link {
  color: var(--text-medium);
  text-decoration: none;
  font-size: 0.95rem;
}

.footer-link:hover {
  color: var(--primary-color);
}

.hero-footer {
  text-align: center;
  padding: 60px 0 20px;
}

.copyright {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
  .container {
    padding: 12px;
  }

  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.3rem; }

  .hero-title {
    font-size: 2rem;
  }

  .guest-form {
    padding: 24px 20px;
  }

  .btn-large {
    min-width: 100%;
  }

  .radio-group {
    flex-direction: column;
    gap: 12px;
  }

  .stats-grid-simple {
    grid-template-columns: 1fr;
  }

  .features-section {
    grid-template-columns: 1fr;
  }

  .table-wrapper {
    font-size: 0.9rem;
  }

  .visitors-table th,
  .visitors-table td {
    padding: 8px;
  }
}

@media (max-width: 480px) {
  .hero-header {
    padding: 40px 0 30px;
  }

  .stat-card {
    flex-direction: column;
    text-align: center;
  }
}