/* ========================================
   TICKET SYSTEM - DESIGN SYSTEM
   ======================================== */

/* --- CSS Variables: Dark Theme (default) --- */
:root, [data-theme="dark"] {
  --bg-primary: #0f1923;
  --bg-secondary: #1a2733;
  --bg-tertiary: #243442;
  --bg-hover: #2a3f52;
  --accent: #00d4aa;
  --accent-hover: #00b896;
  --accent-gradient: linear-gradient(135deg, #00d4aa, #00b4d8);
  --text-primary: #e8edf2;
  --text-secondary: #8899aa;
  --text-muted: #5a6a7a;
  --border: #2a3a4a;
  --border-light: #1e2e3e;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --danger: #ff4757;
  --danger-bg: rgba(255, 71, 87, 0.12);
  --warning: #ffa502;
  --warning-bg: rgba(255, 165, 2, 0.12);
  --success: #2ed573;
  --success-bg: rgba(46, 213, 115, 0.12);
  --info: #1e90ff;
  --info-bg: rgba(30, 144, 255, 0.12);
  --sidebar-bg: #0c1219;
  --sidebar-hover: #162029;
  --sidebar-active: rgba(0, 212, 170, 0.1);
  --input-bg: #1a2733;
  --card-bg: #1a2733;
  --modal-bg: #1a2733;
  --table-header-bg: #162029;
  --table-row-hover: rgba(0, 212, 170, 0.05);
  --scrollbar-bg: #1a2733;
  --scrollbar-thumb: #3a4a5a;
}

/* --- CSS Variables: Light Theme --- */
[data-theme="light"] {
  --bg-primary: #f0f4f8;
  --bg-secondary: #ffffff;
  --bg-tertiary: #e2e8f0;
  --bg-hover: #d4dce6;
  --accent: #00b896;
  --accent-hover: #009e80;
  --accent-gradient: linear-gradient(135deg, #00b896, #009dd8);
  --text-primary: #1a202c;
  --text-secondary: #718096;
  --text-muted: #a0aec0;
  --border: #cbd5e0;
  --border-light: #e2e8f0;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --danger: #e53e3e;
  --danger-bg: rgba(229, 62, 62, 0.08);
  --warning: #dd6b20;
  --warning-bg: rgba(221, 107, 32, 0.08);
  --success: #38a169;
  --success-bg: rgba(56, 161, 105, 0.08);
  --info: #3182ce;
  --info-bg: rgba(49, 130, 206, 0.08);
  --sidebar-bg: #1a2733;
  --sidebar-hover: #243442;
  --sidebar-active: rgba(0, 212, 170, 0.15);
  --input-bg: #ffffff;
  --card-bg: #ffffff;
  --modal-bg: #ffffff;
  --table-header-bg: #edf2f7;
  --table-row-hover: rgba(0, 184, 150, 0.05);
  --scrollbar-bg: #e2e8f0;
  --scrollbar-thumb: #a0aec0;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow: hidden;
  height: 100vh;
  transition: background 0.3s ease, color 0.3s ease;
}

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

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--scrollbar-bg); }
::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 3px; }

/* --- LOGIN VIEW --- */
.login-view {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #0f1923;
  z-index: 1000;
}

#particle-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.login-card {
  position: relative;
  z-index: 1;
  background: rgba(26, 39, 51, 0.92);
  border: 1px solid rgba(0, 212, 170, 0.15);
  border-radius: 16px;
  padding: 48px 40px 36px;
  width: 100%;
  max-width: 400px;
  text-align: center;
  backdrop-filter: blur(12px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.login-logo {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(0, 212, 170, 0.12);
  border: 2px solid rgba(0, 212, 170, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.login-logo i {
  font-size: 28px;
  color: #00d4aa;
}

.login-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: #e8edf2;
  margin-bottom: 4px;
}

.login-subtitle {
  color: #8899aa;
  font-size: 0.9rem;
  margin-bottom: 32px;
}

.login-card .form-group {
  margin-bottom: 20px;
  text-align: left;
}

.login-card .form-group label {
  display: block;
  font-size: 0.85rem;
  color: #8899aa;
  margin-bottom: 6px;
}

.login-card .form-group input {
  width: 100%;
  padding: 12px 14px;
  background: rgba(36, 52, 66, 0.8);
  border: 1px solid rgba(42, 58, 74, 0.8);
  border-radius: 8px;
  color: #e8edf2;
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}

.login-card .form-group input:focus {
  border-color: #00d4aa;
  box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.15);
}

.login-error {
  background: rgba(255, 71, 87, 0.1);
  border: 1px solid rgba(255, 71, 87, 0.3);
  color: #ff6b7a;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.85rem;
  margin-bottom: 16px;
}

.btn-login {
  width: 100%;
  padding: 13px;
  background: linear-gradient(135deg, #00d4aa, #00b4d8);
  border: none;
  border-radius: 8px;
  color: #0f1923;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.1s;
}

.btn-login:hover { opacity: 0.9; }
.btn-login:active { transform: scale(0.98); }
.btn-login:disabled { opacity: 0.6; cursor: not-allowed; }

.login-footer {
  margin-top: 24px;
  color: #5a6a7a;
  font-size: 0.8rem;
}

/* --- APP LAYOUT --- */
.app-view {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* --- SIDEBAR --- */
.sidebar {
  width: 250px;
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border-light);
  transition: width 0.3s ease, transform 0.3s ease;
  flex-shrink: 0;
  z-index: 50;
}

.sidebar.collapsed {
  width: 64px;
}

.sidebar.collapsed .sidebar-title,
.sidebar.collapsed .nav-item span,
.sidebar.collapsed .user-info span {
  display: none;
}

.sidebar-header {
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--border-light);
  min-height: 65px;
}

.sidebar-logo-icon {
  font-size: 24px;
  color: var(--accent);
  flex-shrink: 0;
}

.sidebar-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 8px;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s;
  margin-bottom: 2px;
}

.nav-item:hover {
  background: var(--sidebar-hover);
  color: var(--text-primary);
}

.nav-item.active {
  background: var(--sidebar-active);
  color: var(--accent);
}

.nav-item i {
  font-size: 1.1rem;
  width: 22px;
  text-align: center;
  flex-shrink: 0;
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border-light);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.user-info i { font-size: 1.3rem; color: var(--accent); flex-shrink: 0; }

/* --- MAIN CONTENT --- */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg-primary);
  transition: background 0.3s ease;
}

/* --- TOP HEADER --- */
.top-header {
  display: flex;
  align-items: center;
  padding: 0 24px;
  height: 65px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  gap: 16px;
}

.sidebar-toggle {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 8px;
  border-radius: 6px;
  transition: all 0.2s;
}

.sidebar-toggle:hover { background: var(--bg-tertiary); color: var(--text-primary); }

.page-title {
  flex: 1;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
}

.header-actions {
  display: flex;
  gap: 8px;
}

.btn-header, .theme-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  width: 38px;
  height: 38px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1rem;
  transition: all 0.2s;
}

.btn-header:hover, .theme-toggle:hover {
  background: var(--bg-tertiary);
  color: var(--accent);
  border-color: var(--accent);
}

/* --- PAGE CONTENT --- */
.page-content {
  flex: 1;
  padding: 24px;
  overflow-y: auto;
}

/* --- CARDS --- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: transform 0.2s, box-shadow 0.2s, background 0.3s;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.stat-icon.accent { background: rgba(0, 212, 170, 0.12); color: var(--accent); }
.stat-icon.danger { background: var(--danger-bg); color: var(--danger); }
.stat-icon.warning { background: var(--warning-bg); color: var(--warning); }
.stat-icon.success { background: var(--success-bg); color: var(--success); }
.stat-icon.info { background: var(--info-bg); color: var(--info); }

.stat-info h3 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 4px;
}

.stat-info p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* --- CHARTS --- */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.chart-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  transition: background 0.3s;
}

.chart-card h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.chart-container {
  position: relative;
  height: 280px;
}

/* --- TABLES --- */
.table-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: background 0.3s;
}

.table-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 12px;
}

.table-header h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.table-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.search-input {
  padding: 8px 14px;
  padding-left: 36px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 0.85rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  min-width: 200px;
}

.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.1);
}

.search-wrapper {
  position: relative;
}

.search-wrapper i {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.85rem;
}

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

.data-table thead {
  background: var(--table-header-bg);
}

.data-table th {
  padding: 12px 16px;
  text-align: left;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 12px 16px;
  font-size: 0.88rem;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-light);
  vertical-align: middle;
}

.data-table tbody tr {
  transition: background 0.15s;
}

.data-table tbody tr:hover {
  background: var(--table-row-hover);
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

/* --- ACTION BUTTONS --- */
.btn {
  padding: 8px 16px;
  border-radius: 8px;
  border: none;
  font-size: 0.85rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #0f1923;
}
.btn-primary:hover { opacity: 0.9; }

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--bg-hover); }

.btn-danger {
  background: var(--danger);
  color: #fff;
}
.btn-danger:hover { opacity: 0.85; }

.btn-sm {
  padding: 5px 10px;
  font-size: 0.8rem;
}

.btn-icon {
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.85rem;
  transition: all 0.2s;
}

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

/* --- BADGES --- */
.badge {
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  display: inline-block;
}

.badge-nuevo { background: var(--info-bg); color: var(--info); }
.badge-en_progreso { background: var(--warning-bg); color: var(--warning); }
.badge-cerrado { background: var(--success-bg); color: var(--success); }
.badge-reabierto { background: var(--danger-bg); color: var(--danger); }

.badge-desastre { background: #ff4757; color: #fff; }
.badge-alta { background: #ffa502; color: #1a202c; }
.badge-media { background: var(--warning-bg); color: var(--warning); }
.badge-advertencia { background: var(--success-bg); color: var(--success); }
.badge-info { background: var(--info-bg); color: var(--info); }

.badge-active { background: var(--success-bg); color: var(--success); }
.badge-inactive { background: var(--danger-bg); color: var(--danger); }

/* --- FORMS --- */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.1);
}

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

.form-group select {
  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='%238899aa' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

.form-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  margin-top: 16px;
}

/* Checkbox in permissions */
.permissions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.permission-group {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
}

.permission-group h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.permission-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
}

.permission-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
}

.permission-item label {
  font-size: 0.85rem;
  color: var(--text-primary);
  cursor: pointer;
  margin: 0;
}

/* --- MODAL --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s ease;
}

.modal {
  background: var(--modal-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  width: 90%;
  max-width: 640px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow);
  animation: slideUp 0.3s ease;
}

.modal.modal-wide {
  max-width: 860px;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 6px;
  border-radius: 6px;
  transition: all 0.2s;
}

.modal-close:hover { color: var(--danger); background: var(--danger-bg); }

.modal-body {
  padding: 24px;
  overflow-y: auto;
  flex: 1;
}

/* --- TABS --- */
.tabs {
  display: flex;
  border-bottom: 2px solid var(--border);
  margin-bottom: 20px;
  gap: 0;
}

.tab {
  padding: 10px 20px;
  border: none;
  background: none;
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.2s;
}

.tab:hover { color: var(--text-primary); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

/* --- TIMELINE --- */
.timeline {
  position: relative;
  padding-left: 28px;
}

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

.timeline-item {
  position: relative;
  padding: 12px 0 16px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -24px;
  top: 18px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-secondary);
}

.timeline-item.action-cerrado::before { background: var(--success); }
.timeline-item.action-error_notificacion::before { background: var(--danger); }
.timeline-item.action-comentario::before { background: var(--info); }
.timeline-item.action-cambio_estado::before { background: var(--warning); }

.timeline-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.timeline-user {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text-primary);
}

.timeline-date {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.timeline-action {
  font-size: 0.82rem;
  color: var(--text-secondary);
  background: var(--bg-primary);
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid var(--border-light);
}

/* --- TICKET DETAIL --- */
.ticket-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.info-item {
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  padding: 12px 16px;
}

.info-item .info-label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.info-item .info-value {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-primary);
}

/* --- TOAST --- */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 200;
  display: flex;
  flex-direction: column-reverse;
  gap: 8px;
}

.toast {
  padding: 14px 20px;
  border-radius: 10px;
  font-size: 0.88rem;
  font-weight: 500;
  color: #fff;
  box-shadow: var(--shadow);
  animation: slideInRight 0.3s ease, fadeOut 0.3s ease 3.5s;
  max-width: 380px;
}

.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-warning { background: var(--warning); color: #1a202c; }
.toast-info { background: var(--info); }

/* --- EMPTY STATE --- */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
}

.empty-state i {
  font-size: 3rem;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.empty-state p {
  font-size: 0.88rem;
}

/* --- LOADING --- */
.loading-spinner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px;
}

.loading-spinner::after {
  content: '';
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* Back button */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  margin-bottom: 20px;
  transition: color 0.2s;
}

.back-link:hover { color: var(--accent); }

/* --- TEXT HELPERS --- */
.text-accent { color: var(--accent); }
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-muted { color: var(--text-muted); }

/* --- ANIMATIONS --- */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideInRight { from { opacity: 0; transform: translateX(100px); } to { opacity: 1; transform: translateX(0); } }
@keyframes fadeOut { to { opacity: 0; } }
@keyframes spin { to { transform: rotate(360deg); } }

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    transform: translateX(-100%);
    z-index: 60;
  }

  .sidebar.open { transform: translateX(0); }

  .stats-grid { grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }
  .charts-grid { grid-template-columns: 1fr; }

  .table-header { flex-direction: column; align-items: flex-start; }
  .search-input { min-width: unset; width: 100%; }

  .modal { width: 95%; max-height: 90vh; }
  .form-grid { grid-template-columns: 1fr; }
  .permissions-grid { grid-template-columns: 1fr; }

  .page-content { padding: 16px; }
}