/* Railway Supervision Portal - Interactive Mock-up Styles
   ETR/S03 "Lupetto" — AXIS P3925-R */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --primary-color: #1e3a8a;
  --primary-dark: #0f172a;
  --secondary-color: #0ea5e9;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --info-color: #3b82f6;
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-light: #94a3b8;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
}

/* ===== HEADER ===== */
.header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-left { display:flex; align-items:center; gap:20px; }
.header-right { display:flex; align-items:center; gap:16px; }
.logo { display:flex; align-items:center; gap:10px; font-size:18px; font-weight:700; color:var(--primary-color); cursor:pointer; }
.logo-icon { width:36px; height:36px; background:linear-gradient(135deg,var(--primary-color),var(--secondary-color)); border-radius:var(--radius-md); display:flex; align-items:center; justify-content:center; color:white; font-size:16px; }
.header-status { display:flex; align-items:center; gap:6px; padding:6px 12px; background:var(--bg-primary); border-radius:var(--radius-md); font-size:12px; color:var(--text-secondary); }
.status-dot { width:8px; height:8px; border-radius:50%; }
.status-dot.online { background:var(--success-color); box-shadow:0 0 6px var(--success-color); }
.header-notifications { position:relative; cursor:pointer; font-size:18px; padding:6px; }
.notif-badge { position:absolute; top:0; right:0; background:var(--danger-color); color:white; font-size:10px; font-weight:700; width:16px; height:16px; border-radius:50%; display:flex; align-items:center; justify-content:center; }
.user-info { display:flex; align-items:center; gap:10px; cursor:pointer; }
.user-avatar { width:34px; height:34px; border-radius:50%; background:linear-gradient(135deg,var(--secondary-color),var(--primary-color)); display:flex; align-items:center; justify-content:center; color:white; font-weight:600; font-size:13px; }
.user-avatar-sm { width:30px; height:30px; border-radius:50%; background:linear-gradient(135deg,var(--secondary-color),var(--primary-color)); display:flex; align-items:center; justify-content:center; color:white; font-weight:600; font-size:11px; flex-shrink:0; }
.user-details { display:flex; flex-direction:column; }
.user-name { font-weight:600; font-size:13px; }
.user-role { font-size:11px; color:var(--text-secondary); }

/* ===== LAYOUT ===== */
.layout { display:flex; min-height:calc(100vh - 61px); }
.sidebar { width:220px; background:var(--bg-secondary); border-right:1px solid var(--border-color); padding:16px 0; display:flex; flex-direction:column; justify-content:space-between; flex-shrink:0; }
.nav-menu { list-style:none; display:flex; flex-direction:column; gap:2px; padding:0 8px; }
.nav-item { padding:10px 14px; border-radius:var(--radius-md); cursor:pointer; transition:all 0.2s; display:flex; align-items:center; gap:10px; color:var(--text-secondary); font-size:13px; font-weight:500; }
.nav-item:hover { background:var(--bg-primary); color:var(--text-primary); }
.nav-item.active { background:linear-gradient(135deg,var(--primary-color),var(--primary-dark)); color:white; }
.nav-icon { width:18px; display:flex; align-items:center; justify-content:center; font-size:16px; }
.sidebar-footer { padding:8px 12px; }
.btn-logout { width:100%; padding:10px; background:none; border:1px solid var(--border-color); border-radius:var(--radius-md); cursor:pointer; font-size:13px; color:var(--text-secondary); transition:all 0.2s; }
.btn-logout:hover { background:#fef2f2; color:var(--danger-color); border-color:var(--danger-color); }
.main-content { flex:1; padding:24px; overflow-y:auto; }

/* ===== PAGE HEADER ===== */
.page-header { display:flex; justify-content:space-between; align-items:start; margin-bottom:20px; flex-wrap:wrap; gap:12px; }
.page-header h1 { font-size:24px; font-weight:700; }
.page-subtitle { color:var(--text-secondary); font-size:13px; margin-top:2px; }

/* ===== BUTTONS ===== */
.btn { padding:8px 16px; border:none; border-radius:var(--radius-md); cursor:pointer; font-size:13px; font-weight:500; transition:all 0.2s; display:inline-flex; align-items:center; gap:6px; }
.btn:hover { transform:translateY(-1px); box-shadow:var(--shadow-md); }
.btn-primary { background:linear-gradient(135deg,var(--primary-color),var(--secondary-color)); color:white; }
.btn-secondary { background:var(--bg-primary); color:var(--text-primary); border:1px solid var(--border-color); }
.btn-danger { background:var(--danger-color); color:white; }
.btn-warning { background:var(--warning-color); color:white; }
.btn-success { background:var(--success-color); color:white; }
.btn-sm { padding:5px 10px; font-size:11px; }

/* ===== CARDS ===== */
.card { background:var(--bg-secondary); border-radius:var(--radius-lg); border:1px solid var(--border-color); box-shadow:var(--shadow-sm); }
.card-header { display:flex; justify-content:space-between; align-items:center; padding:16px 20px; border-bottom:1px solid var(--border-color); }
.card-header h3 { font-size:15px; font-weight:600; }
.card-body { padding:16px 20px; }

/* ===== KPI CARDS ===== */
.kpi-grid { display:grid; grid-template-columns:repeat(auto-fit, minmax(220px, 1fr)); gap:16px; }
.kpi-card { background:var(--bg-secondary); border-radius:var(--radius-lg); padding:20px; border:1px solid var(--border-color); display:flex; align-items:center; gap:16px; box-shadow:var(--shadow-sm); transition:all 0.2s; }
.kpi-card:hover { box-shadow:var(--shadow-md); transform:translateY(-2px); }
.kpi-icon { width:48px; height:48px; border-radius:var(--radius-lg); display:flex; align-items:center; justify-content:center; font-size:22px; flex-shrink:0; }
.kpi-value { font-size:28px; font-weight:700; line-height:1.2; }
.kpi-label { font-size:13px; color:var(--text-secondary); }
.kpi-sub { font-size:11px; color:var(--text-light); margin-top:2px; }

/* ===== STATS BAR ===== */
.stats-bar { display:flex; gap:12px; flex-wrap:wrap; margin-bottom:16px; }
.stat-item { background:var(--bg-secondary); border:1px solid var(--border-color); border-radius:var(--radius-md); padding:12px 18px; text-align:center; min-width:100px; }
.stat-value { font-size:20px; font-weight:700; display:block; }
.stat-label { font-size:11px; color:var(--text-secondary); }

/* ===== FILTER BAR ===== */
.filter-bar { display:flex; gap:12px; flex-wrap:wrap; align-items:end; margin-bottom:16px; padding:14px 18px; background:var(--bg-secondary); border:1px solid var(--border-color); border-radius:var(--radius-lg); }
.filter-group { display:flex; flex-direction:column; gap:4px; }
.filter-group label { font-size:11px; font-weight:600; color:var(--text-secondary); text-transform:uppercase; }

/* ===== FORMS ===== */
.form-input, .form-select { width:100%; padding:9px 12px; border:1px solid var(--border-color); border-radius:var(--radius-md); font-size:13px; font-family:inherit; outline:none; transition:border 0.2s; background:white; }
.form-input:focus, .form-select:focus { border-color:var(--info-color); box-shadow:0 0 0 3px rgba(59,130,246,0.1); }
.form-label { display:block; font-size:12px; font-weight:600; color:var(--text-secondary); margin-bottom:4px; }

/* ===== DATA TABLE ===== */
.data-table { width:100%; border-collapse:collapse; font-size:13px; }
.data-table th { text-align:left; padding:10px 12px; background:var(--bg-primary); font-weight:600; font-size:11px; text-transform:uppercase; color:var(--text-secondary); border-bottom:1px solid var(--border-color); }
.data-table td { padding:10px 12px; border-bottom:1px solid var(--border-color); }
.data-table tr:hover { background:var(--bg-primary); }

/* ===== BADGES ===== */
.badge { display:inline-block; padding:3px 8px; border-radius:12px; font-size:11px; font-weight:600; }
.badge-success { background:#d1fae5; color:#065f46; }
.badge-warning { background:#fef3c7; color:#92400e; }
.badge-danger { background:#fee2e2; color:#991b1b; }
.badge-info { background:#dbeafe; color:#1e40af; }

/* ===== GRID LAYOUTS ===== */
.grid-2 { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
@media (max-width:900px) { .grid-2 { grid-template-columns:1fr; } }

/* ===== CAMERA GRID ===== */
.camera-grid { display:grid; grid-template-columns:repeat(auto-fill, minmax(280px, 1fr)); gap:14px; }
.camera-card { background:var(--bg-secondary); border-radius:var(--radius-lg); border:1px solid var(--border-color); overflow:hidden; transition:all 0.2s; }
.camera-card:hover { box-shadow:var(--shadow-md); transform:translateY(-2px); }
.camera-card-body { padding:12px; }
.camera-list-view { display:flex; flex-direction:column; gap:8px; }
.camera-list-view .camera-card { display:flex; border-left-width:4px; }
.camera-list-view .camera-card-header { width:200px; flex-shrink:0; }
.camera-list-view .camera-card-body { flex:1; display:flex; align-items:center; gap:16px; }

/* ===== METRIC BADGES & CARDS ===== */
.metric-badge { display:inline-block; padding:2px 8px; background:var(--bg-primary); border-radius:10px; font-size:10px; font-weight:600; color:var(--text-secondary); }
.metric-card { background:var(--bg-primary); border-radius:var(--radius-md); padding:12px; text-align:center; }
.metric-val { font-size:18px; font-weight:700; color:var(--text-primary); }
.metric-lbl { font-size:11px; color:var(--text-secondary); margin-top:2px; }

/* ===== INFO BOX ===== */
.info-box { background:var(--bg-primary); border-radius:var(--radius-md); padding:10px; }
.info-label { font-size:10px; font-weight:600; color:var(--text-light); text-transform:uppercase; margin-bottom:2px; }
.info-value { font-size:13px; font-weight:600; color:var(--text-primary); }
.info-grid { display:grid; grid-template-columns:1fr 1fr; gap:8px; }

/* ===== ALERT ITEMS ===== */
.alert-item { display:flex; align-items:center; gap:12px; padding:12px; background:var(--bg-primary); border-radius:var(--radius-md); border-left:3px solid; margin-bottom:8px; cursor:pointer; transition:all 0.2s; }
.alert-item:hover { box-shadow:var(--shadow-sm); }
.alert-item.critical { border-left-color:var(--danger-color); }
.alert-item.warning { border-left-color:var(--warning-color); }
.alert-item.info { border-left-color:var(--info-color); }
.alert-icon { width:32px; height:32px; border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:16px; flex-shrink:0; }
.alert-content { flex:1; }
.alert-title { font-weight:600; font-size:13px; }
.alert-description { font-size:12px; color:var(--text-secondary); }

/* ===== TRAIN ROW ===== */
.train-row { display:flex; justify-content:space-between; align-items:center; padding:10px 12px; background:var(--bg-primary); border-radius:var(--radius-md); margin-bottom:6px; transition:all 0.2s; }
.train-row:hover { background:#e2e8f0; }
.train-info { display:flex; align-items:center; gap:10px; }
.train-icon { font-size:18px; }
.train-name { font-weight:600; font-size:13px; }
.train-route { font-size:11px; color:var(--text-secondary); }
.train-cameras { display:flex; gap:8px; font-size:12px; }
.cam-badge { display:inline-flex; align-items:center; gap:3px; font-weight:600; }
.cam-badge.online { color:var(--success-color); }
.cam-badge.offline { color:var(--danger-color); }

/* ===== DIAGNOSTICS LAYOUT ===== */
.diag-layout { display:grid; grid-template-columns:260px 1fr; gap:20px; }
.diag-sidebar { background:var(--bg-secondary); border:1px solid var(--border-color); border-radius:var(--radius-lg); overflow:hidden; }
.diag-main { min-height:500px; }

/* ===== COMMAND BUTTONS ===== */
.cmd-btn { padding:12px; border:1px solid var(--border-color); border-radius:var(--radius-md); background:var(--bg-primary); cursor:pointer; font-size:13px; font-weight:500; transition:all 0.2s; display:flex; flex-direction:column; align-items:center; gap:4px; }
.cmd-btn:hover { background:var(--primary-color); color:white; border-color:var(--primary-color); transform:translateY(-1px); box-shadow:var(--shadow-md); }
.cmd-btn span { font-size:20px; }

/* ===== ANIMATIONS ===== */
@keyframes pulse { 0%,100% { opacity:1; } 50% { opacity:0.4; } }
@keyframes fadeIn { from { opacity:0; } to { opacity:1; } }

/* ===== UTILITY ===== */
.clickable { cursor:pointer; transition:all 0.2s; }
.clickable:hover { transform:translateY(-1px); }

/* ===== RESPONSIVE ===== */
@media (max-width:768px) {
  .sidebar { display:none; }
  .main-content { padding:16px; }
  .diag-layout { grid-template-columns:1fr; }
  .page-header { flex-direction:column; }
  .kpi-grid { grid-template-columns:1fr 1fr; }
  .stats-bar { flex-direction:column; }
}