/* ========== Evonik-Inspired Design System ========== */
:root {
  --primary: #6B1A5E;
  --primary-light: #8C2A7A;
  --primary-dark: #4A0E40;
  --accent: #F0C75E;
  --accent-dark: #D4A93E;
  --bg: #991D85;
  --card-bg: #FFFFFF;
  --text: #FFFFFF;
  --text-light: #E8D4F0;
  --text-dark: #2D1A2E;
  --text-muted: #6B5A70;
  --border: #D4A0CC;
  --border-light: rgba(255,255,255,0.2);
  --danger: #EF4444;
  --danger-light: #FEE2E2;
  --success: #10B981;
  --success-light: #D1FAE5;
  --warning: #F59E0B;
  --warning-light: #FEF3C7;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-lg: 0 4px 14px rgba(0,0,0,0.1);
  --radius: 10px;
  --radius-sm: 6px;
  --transition: 0.2s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dark); }

/* ========== Navbar ========== */
.navbar {
  background: var(--primary);
  color: white;
  padding: 0 2rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar .brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.navbar .brand .logo {
  width: 32px;
  height: 32px;
  background: var(--accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links a {
  color: rgba(255,255,255,0.8);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.5rem 0;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
}

.nav-links a:hover, .nav-links a.active {
  color: white;
  border-bottom-color: var(--accent);
}

.nav-user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
}

.nav-user .avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
}

.lang-switch {
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  color: white;
  padding: 0.3rem 0.7rem;
  border-radius: 6px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: var(--transition);
}

.lang-switch:hover {
  background: rgba(255,255,255,0.25);
}

/* ========== Layout ========== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

.page-header {
  margin-bottom: 1.5rem;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.5rem;
  font-size: 0.85rem;
  background: rgba(255,255,255,0.1);
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  width: fit-content;
}

.breadcrumb a {
  color: var(--accent);
  font-weight: 500;
  transition: var(--transition);
}

.breadcrumb a:hover {
  color: #fff;
  text-decoration: underline;
}

.breadcrumb .sep {
  color: rgba(255,255,255,0.4);
}

.breadcrumb .current {
  color: rgba(255,255,255,0.9);
}

/* Navbar back button */
.nav-back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: rgba(255,255,255,0.8);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.3rem 0.7rem;
  border-radius: 6px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  text-decoration: none;
  transition: var(--transition);
  margin-right: 0.75rem;
}

.nav-back:hover {
  background: rgba(255,255,255,0.2);
  color: white;
}

.page-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: #FFFFFF;
}

.page-header p {
  color: rgba(255,255,255,0.75);
  margin-top: 0.25rem;
}

/* ========== Cards ========== */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  margin-bottom: 1rem;
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-lg);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.card-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary-dark);
}

/* Ensure text inside cards is dark */
.card,
.card p,
.card span,
.card div {
  color: var(--text-dark);
}

/* ========== Stats Grid ========== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--accent);
}

.stat-card .stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-dark);
}

.stat-card .stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: #FFFFFF;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.btn-primary:hover {
  background: var(--primary-light);
  transform: translateY(-1px);
}

.btn-accent {
  background: var(--accent);
  color: var(--primary-dark);
  font-weight: 700;
}

.btn-accent:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
}

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

.btn-danger:hover {
  background: #DC2626;
}

.btn-outline {
  background: transparent;
  border: 1.5px solid rgba(255,255,255,0.4);
  color: #FFFFFF;
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
}

.btn-icon {
  padding: 0.4rem;
  border-radius: 8px;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  transition: var(--transition);
}

.btn-icon:hover {
  background: var(--bg);
  color: var(--primary);
}

/* ========== Forms ========== */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 0.35rem;
}

/* All labels on purple background are white by default */
.form-group label {
  color: #FFFFFF;
  text-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

/* Labels inside cards or login box must be dark (white bg) */
.card .form-group label,
.card label,
.login-box .form-group label,
.login-box label {
  color: #1F2937;
  font-weight: 600;
  text-shadow: none;
}

.form-control {
  width: 100%;
  padding: 0.65rem 0.9rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  transition: var(--transition);
  background: white;
  color: var(--text-dark);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 48, 94, 0.1);
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236B7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2rem;
}

select.form-control option {
  color: #333;
  background: white;
}

textarea.form-control {
  resize: vertical;
  min-height: 80px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* ========== Tables ========== */
.table-wrap {
  overflow-x: auto;
}

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

table th {
  background: #E8D4F0;
  padding: 0.75rem 1rem;
  text-align: left;
  font-size: 0.8rem;
  font-weight: 600;
  color: #2D1A2E;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--border);
}

table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--text-dark);
}

table tr:hover td {
  background: rgba(153, 29, 133, 0.06);
}

/* ========== Badges ========== */
.badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-success {
  background: var(--success-light);
  color: #065F46;
}

.badge-danger {
  background: var(--danger-light);
  color: #991B1B;
}

.badge-warning {
  background: var(--warning-light);
  color: #92400E;
}

.badge-info {
  background: #DBEAFE;
  color: #1E40AF;
}

/* ========== Login Page ========== */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
  padding: 1rem;
}

.login-box {
  background: white;
  border-radius: 16px;
  padding: 2.5rem;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}

.login-box .logo-area {
  text-align: center;
  margin-bottom: 2rem;
}

.login-box .logo-area .logo-icon {
  width: 56px;
  height: 56px;
  background: var(--accent);
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 0.75rem;
}

.login-box .logo-area h2 {
  font-size: 1.5rem;
  color: var(--primary-dark);
  font-weight: 700;
}

.login-box .logo-area p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.login-box .btn-primary {
  width: 100%;
  padding: 0.8rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: #FFFFFF;
  justify-content: center;
  background: var(--primary-dark);
  letter-spacing: 0.1em;
}

.login-box .login-footer {
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.login-error {
  background: var(--danger-light);
  color: var(--danger);
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin-bottom: 1rem;
  display: none;
}

.icp-footer {
  text-align: center;
  padding-top: 1.5rem;
  margin-top: 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.75rem;
}

/* ========== Modal ========== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: white;
  border-radius: var(--radius);
  padding: 2rem;
  width: 90%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(20px);
  transition: var(--transition);
}

.modal-overlay.active .modal {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.modal-header h3 {
  font-size: 1.2rem;
  color: var(--primary-dark);
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-muted);
  padding: 0.25rem;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

/* ========== Timeline / Schedule ========== */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  margin-bottom: 1.5rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -1.65rem;
  top: 0.5rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--primary);
}

.timeline-item .time {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
}

.timeline-item .event {
  background: var(--card-bg);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  margin-top: 0.25rem;
  box-shadow: var(--shadow);
  border-left: 3px solid var(--accent);
}

.timeline-item .event h4 {
  font-size: 0.95rem;
  color: var(--primary-dark);
}

.timeline-item .event p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

/* ========== Room Cards ========== */
.room-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.room-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}

.room-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg);
}

.room-card.selected {
  border-color: var(--accent);
  background: rgba(163, 214, 0, 0.05);
}

.room-card .room-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary-dark);
}

.room-card .room-location {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

.room-card .room-meta {
  display: flex;
  gap: 1rem;
  margin-top: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.room-card .room-meta span {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.room-card .room-facilities {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.75rem;
}

.room-card .facility-tag {
  background: #F3E8F5;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  color: var(--primary-dark);
}

.room-status-unavailable {
  opacity: 0.5;
  pointer-events: none;
}

/* ========== Calendar Grid ========== */
.calendar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.calendar-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.calendar-nav .date-display {
  font-size: 1.1rem;
  font-weight: 700;
  color: #FFFFFF;
  min-width: 200px;
  text-align: center;
  text-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

/* ========== Tabs ========== */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid rgba(255,255,255,0.25);
  margin-bottom: 1.5rem;
}

.tab {
  padding: 0.75rem 1.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: rgba(255,255,255,0.6);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: var(--transition);
}

.tab:hover {
  color: #FFFFFF;
}

.tab.active {
  color: #FFFFFF;
  border-bottom-color: var(--accent);
}

/* ========== Toast ========== */
.toast-container {
  position: fixed;
  top: 70px;
  right: 1rem;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  background: #FFFFFF;
  color: #1F2937;
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  font-size: 0.9rem;
  font-weight: 600;
  animation: slideIn 0.3s ease;
  border-left: 4px solid var(--accent);
}

.toast.error {
  border-left-color: var(--danger);
  color: #991B1B;
  background: #FEF2F2;
}

.toast.success {
  border-left-color: var(--success);
  color: #065F46;
  background: #ECFDF5;
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ========== Empty State ========== */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: rgba(255,255,255,0.7);
}

.empty-state .empty-icon {
  font-size: 3rem;
  margin-bottom: 0.75rem;
}

.empty-state p {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.9);
  font-weight: 500;
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
  .container { padding: 1rem; }
  .navbar { padding: 0 1rem; }
  .form-row { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .nav-links { gap: 0.75rem; }
  .nav-links a { font-size: 0.8rem; }
  .room-grid { grid-template-columns: 1fr; }
}

/* ========== Utility ========== */
.hidden { display: none !important; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }