/* ═══════════════════════════════════════════════════════
   CraneWave × Viridor — WTE Crane PM Portal
   Shared Stylesheet v2.1
   ═══════════════════════════════════════════════════════ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: #1a2235;
  --bg-card-hover: #1f2a40;
  --bg-input: #151d2e;
  --border: #2a3554;
  --border-light: #334170;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-blue: #3b82f6;
  --accent-cyan: #06b6d4;
  --accent-green: #10b981;
  --accent-yellow: #f59e0b;
  --accent-orange: #f97316;
  --accent-red: #ef4444;
  --accent-purple: #8b5cf6;
  --cranewave-orange: #e8751a;
  --viridor-green: #7ab648;
  --viridor-dark: #2d6e35;
  --shadow-card: 0 2px 8px rgba(0,0,0,0.2);
  --shadow-hover: 0 8px 24px rgba(0,0,0,0.3);
}

/* ─── LIGHT THEME ─── */
[data-theme="light"] {
  --bg-primary: #f0f2f5;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f8f9fb;
  --bg-input: #f3f4f6;
  --border: #d1d5db;
  --border-light: #9ca3af;
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-muted: #6b7280;
  --accent-blue: #2563eb;
  --accent-cyan: #0891b2;
  --accent-green: #059669;
  --accent-yellow: #d97706;
  --accent-orange: #ea580c;
  --accent-red: #dc2626;
  --accent-purple: #7c3aed;
  --cranewave-orange: #d4650f;
  --viridor-green: #5a9a30;
  --viridor-dark: #1e5a25;
  --shadow-card: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-hover: 0 4px 12px rgba(0,0,0,0.1);
}

[data-theme="light"] body::before {
  background:
    linear-gradient(rgba(0,0,0,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

[data-theme="light"] .header {
  background: linear-gradient(180deg, #ffffff 0%, #f0f2f5 100%);
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

[data-theme="light"] .sidebar {
  background: #ffffff;
  box-shadow: 1px 0 3px rgba(0,0,0,0.05);
}

[data-theme="light"] .stat-card,
[data-theme="light"] .card,
[data-theme="light"] .sensor-card,
[data-theme="light"] .s-card,
[data-theme="light"] .oil-card,
[data-theme="light"] .oil-panel,
[data-theme="light"] .gw-card,
[data-theme="light"] .wo-card,
[data-theme="light"] .motion-card,
[data-theme="light"] .setting-group {
  box-shadow: var(--shadow-card);
}

[data-theme="light"] .stat-card:hover,
[data-theme="light"] .card:hover,
[data-theme="light"] .sensor-card:hover,
[data-theme="light"] .s-card:hover {
  box-shadow: var(--shadow-hover);
}

[data-theme="light"] .footer {
  background: #ffffff;
  box-shadow: 0 -1px 3px rgba(0,0,0,0.05);
}

[data-theme="light"] .status-dot {
  box-shadow: 0 0 6px rgba(5,150,105,0.5);
}

[data-theme="light"] .logo-text,
[data-theme="light"] .viridor-logo-text {
  -webkit-text-fill-color: initial;
  background: none;
}

[data-theme="light"] .viridor-logo-text {
  color: var(--viridor-green);
}

[data-theme="light"] .logo-group img {
  filter: brightness(0.2) saturate(1.5);
}

[data-theme="light"] .nav-btn.active {
  background: rgba(37, 99, 235, 0.1);
  color: var(--accent-blue);
}

[data-theme="light"] .sidebar-item.active {
  background: rgba(37, 99, 235, 0.08);
  border-color: rgba(37, 99, 235, 0.15);
}

[data-theme="light"] .noise-bar.low { box-shadow: none; }
[data-theme="light"] .noise-bar.medium { box-shadow: none; }
[data-theme="light"] .noise-bar.high { box-shadow: none; }

[data-theme="light"] .progress-bg,
[data-theme="light"] .noise-bar-bg {
  background: #e5e7eb;
}

[data-theme="light"] .topology-icon.cloud {
  background: linear-gradient(135deg, rgba(37,99,235,0.1), rgba(8,145,178,0.1));
  border-color: rgba(37,99,235,0.2);
}

[data-theme="light"] .topology-icon.onsite {
  background: linear-gradient(135deg, rgba(5,150,105,0.1), rgba(8,145,178,0.1));
  border-color: rgba(5,150,105,0.2);
}

[data-theme="light"] .topology-icon.sensor {
  background: linear-gradient(135deg, rgba(124,58,237,0.1), rgba(37,99,235,0.1));
  border-color: rgba(124,58,237,0.2);
}

/* Theme toggle button */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  cursor: pointer;
  font-size: 12px;
  color: var(--text-secondary);
  font-family: inherit;
  transition: all 0.3s;
}

.theme-toggle:hover {
  border-color: var(--border-light);
  color: var(--text-primary);
}

.theme-toggle .theme-icon {
  font-size: 14px;
  transition: transform 0.3s;
}

.theme-toggle:hover .theme-icon {
  transform: rotate(30deg);
}

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

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content:'';
  position:fixed;
  inset:0;
  background:
    linear-gradient(rgba(59,130,246,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59,130,246,0.03) 1px, transparent 1px);
  background-size:60px 60px;
  pointer-events:none;
  z-index:0;
}

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

/* ─── HEADER ─── */
.header {
  background: linear-gradient(180deg, #0f1729 0%, var(--bg-primary) 100%);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

.header-left { display:flex; align-items:center; gap:20px; }

.logo-group {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo-group img {
  height: 38px;
  width: auto;
  object-fit: contain;
}

.logo-divider {
  width: 1px;
  height: 32px;
  background: var(--border);
}

.viridor-logo-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
}

.viridor-logo-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 3px;
  background: linear-gradient(135deg, var(--viridor-green), #9ece6a);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.viridor-logo-sub {
  font-size: 8px;
  letter-spacing: 2.5px;
  color: var(--text-muted);
  text-transform: uppercase;
}

.portal-title {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  border-left: 1px solid var(--border);
  padding-left: 14px;
  line-height: 1.3;
}

.portal-title strong {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
  text-transform: none;
}

.header-nav {
  display: flex;
  gap: 2px;
}

.nav-btn {
  padding: 8px 14px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border-radius: 6px;
  transition: all 0.2s;
  font-family: inherit;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.nav-btn:hover { background: var(--bg-card); color: var(--text-primary); }
.nav-btn.active {
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent-blue);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

.gateway-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 11px;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
  animation: pulse 2s infinite;
}

.status-dot.warning { background: var(--accent-yellow); box-shadow: 0 0 8px var(--accent-yellow); }
.status-dot.offline { background: var(--accent-red); box-shadow: 0 0 8px var(--accent-red); animation:none; }

@keyframes pulse { 0%,100%{opacity:1}50%{opacity:0.5} }

.time-display {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--text-muted);
}

.logout-btn {
  background: rgba(239,68,68,0.1);
  border: 1px solid rgba(239,68,68,0.25);
  border-radius: 8px;
  color: var(--accent-red);
  font-size: 14px;
  padding: 5px 10px;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
  line-height: 1;
}

.logout-btn:hover {
  background: rgba(239,68,68,0.2);
  border-color: rgba(239,68,68,0.5);
  color: #f87171;
}

.user-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--cranewave-orange), var(--accent-orange));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  color: white;
  cursor: pointer;
}

/* ─── LAYOUT ─── */
.main-layout {
  display: flex;
  min-height: calc(100vh - 64px);
  position: relative;
  z-index: 1;
}

/* ─── SIDEBAR ─── */
.sidebar {
  width: 220px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  padding: 16px 10px;
  flex-shrink: 0;
}

.sidebar-section { margin-bottom: 18px; }

.sidebar-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  padding: 0 10px;
  margin-bottom: 6px;
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 10px;
  border-radius: 7px;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 13px;
  color: var(--text-secondary);
  border: 1px solid transparent;
  text-decoration: none;
}

.sidebar-item:hover { background: var(--bg-card); color: var(--text-primary); }
.sidebar-item.active {
  background: rgba(59,130,246,0.1);
  color: var(--accent-blue);
  border-color: rgba(59,130,246,0.2);
}

.sidebar-item .icon { width:18px; text-align:center; font-size:14px; }

.sidebar-badge {
  margin-left: auto;
  background: var(--accent-red);
  color: white;
  font-size: 10px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 10px;
}

/* ─── CONTENT ─── */
.content {
  flex: 1;
  padding: 24px;
  overflow-y: auto;
  max-height: calc(100vh - 64px);
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.page-title {
  font-size: 20px;
  font-weight: 700;
}

.page-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ─── CARDS ─── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
  transition: all 0.3s;
}

.card:hover {
  border-color: var(--border-light);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.card-title {
  font-size: 14px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ─── STATS ROW ─── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  position: relative;
  overflow: hidden;
  transition: all 0.3s;
}

.stat-card:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

.stat-card::before {
  content:'';
  position: absolute;
  top:0; left:0; right:0;
  height: 3px;
}

.stat-card.blue::before { background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan)); }
.stat-card.green::before { background: linear-gradient(90deg, var(--accent-green), #34d399); }
.stat-card.yellow::before { background: linear-gradient(90deg, var(--accent-yellow), var(--accent-orange)); }
.stat-card.red::before { background: linear-gradient(90deg, var(--accent-red), #f87171); }
.stat-card.purple::before { background: linear-gradient(90deg, var(--accent-purple), #a78bfa); }
.stat-card.orange::before { background: linear-gradient(90deg, var(--cranewave-orange), var(--accent-orange)); }

.stat-label {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.stat-value {
  font-size: 26px;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
}

.stat-card.blue .stat-value { color: var(--accent-cyan); }
.stat-card.green .stat-value { color: var(--accent-green); }
.stat-card.yellow .stat-value { color: var(--accent-yellow); }
.stat-card.red .stat-value { color: var(--accent-red); }
.stat-card.purple .stat-value { color: var(--accent-purple); }
.stat-card.orange .stat-value { color: var(--cranewave-orange); }

.stat-change {
  display:flex;
  align-items:center;
  gap:4px;
  font-size:11px;
  margin-top:4px;
  color:var(--text-muted);
}

.stat-change.up { color: var(--accent-green); }
.stat-change.down { color: var(--accent-red); }

/* ─── BUTTONS ─── */
.btn {
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn-default {
  background: var(--bg-secondary);
  color: var(--text-secondary);
}

.btn-default:hover { background: var(--bg-card-hover); color: var(--text-primary); }

.btn-primary {
  background: rgba(59,130,246,0.15);
  border-color: rgba(59,130,246,0.3);
  color: var(--accent-blue);
}

.btn-primary:hover {
  background: rgba(59,130,246,0.25);
}

.btn-danger {
  background: rgba(239,68,68,0.12);
  border-color: rgba(239,68,68,0.3);
  color: var(--accent-red);
}

.btn-success {
  background: rgba(16,185,129,0.12);
  border-color: rgba(16,185,129,0.3);
  color: var(--accent-green);
}

.btn-sm { padding: 5px 10px; font-size: 12px; }

/* ─── TABLES ─── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.data-table th {
  text-align: left;
  padding: 10px 12px;
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-secondary);
}

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

.data-table tr:hover td {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.data-table .mono {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
}

/* ─── BADGES ─── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 500;
}

.badge-green { background: rgba(16,185,129,0.12); color: var(--accent-green); }
.badge-yellow { background: rgba(245,158,11,0.12); color: var(--accent-yellow); }
.badge-red { background: rgba(239,68,68,0.12); color: var(--accent-red); }
.badge-blue { background: rgba(59,130,246,0.12); color: var(--accent-blue); }
.badge-purple { background: rgba(139,92,246,0.12); color: var(--accent-purple); }
.badge-orange { background: rgba(249,115,22,0.12); color: var(--accent-orange); }

/* ─── FORM CONTROLS ─── */
.form-group { margin-bottom: 14px; }
.form-label {
  display: block;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 5px;
  font-weight: 500;
}

.form-input, .form-select {
  width: 100%;
  padding: 9px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 13px;
  font-family: inherit;
  transition: border-color 0.2s;
}

.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}

.form-select { cursor: pointer; }

/* ─── NOISE BAR ─── */
.noise-bar-bg {
  width:100%; height:6px;
  background: var(--bg-secondary);
  border-radius:3px;
  overflow:hidden;
}

.noise-bar { height:100%; border-radius:3px; transition: width 1s ease; }
.noise-bar.low { background: linear-gradient(90deg, var(--accent-green), #34d399); box-shadow: 0 0 8px rgba(16,185,129,0.4); }
.noise-bar.medium { background: linear-gradient(90deg, var(--accent-yellow), var(--accent-orange)); box-shadow: 0 0 8px rgba(245,158,11,0.4); }
.noise-bar.high { background: linear-gradient(90deg, var(--accent-orange), var(--accent-red)); box-shadow: 0 0 8px rgba(239,68,68,0.4); }

/* ─── PROGRESS BAR ─── */
.progress-bg {
  width:100%; height:8px;
  background: var(--bg-secondary);
  border-radius:4px;
  overflow:hidden;
}

.progress-fill {
  height:100%;
  border-radius:4px;
  transition: width 0.5s ease;
}

/* ─── SPARKLINE ─── */
.sparkline-row {
  display:flex;
  align-items:flex-end;
  gap:2px;
  height:28px;
}

.spark-bar {
  flex:1;
  background: var(--accent-blue);
  border-radius:2px 2px 0 0;
  opacity:0.5;
  min-height:2px;
  transition: all 0.3s;
}

.spark-bar:last-child { opacity:1; }
.spark-bar.warn { background: var(--accent-yellow); }
.spark-bar.danger { background: var(--accent-red); }

/* ─── TOPOLOGY ─── */
.topology {
  display:flex;
  align-items:center;
  justify-content:center;
  gap:0;
  padding:20px 0;
}

.topology-node {
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:8px;
  min-width:130px;
}

.topology-icon {
  width:60px; height:60px;
  border-radius:14px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:24px;
}

.topology-icon.cloud {
  background: linear-gradient(135deg, rgba(59,130,246,0.2), rgba(6,182,212,0.2));
  border: 1px solid rgba(59,130,246,0.3);
}

.topology-icon.onsite {
  background: linear-gradient(135deg, rgba(16,185,129,0.2), rgba(6,182,212,0.2));
  border: 1px solid rgba(16,185,129,0.3);
}

.topology-icon.sensor {
  background: linear-gradient(135deg, rgba(139,92,246,0.2), rgba(59,130,246,0.2));
  border: 1px solid rgba(139,92,246,0.3);
}

.topology-label { font-size:12px; font-weight:600; text-align:center; }
.topology-meta { font-size:10px; color:var(--text-muted); text-align:center; }

.topology-connector {
  width:80px; height:2px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
  position:relative;
  margin:0 -4px;
  margin-bottom:30px;
}

.topology-connector::after {
  content:'';
  position:absolute;
  right:-4px; top:-4px;
  width:10px; height:10px;
  border-right:2px solid var(--accent-cyan);
  border-top:2px solid var(--accent-cyan);
  transform:rotate(45deg);
}

.conn-label {
  position:absolute;
  top:-18px; left:50%;
  transform:translateX(-50%);
  font-size:9px;
  color:var(--text-muted);
  white-space:nowrap;
}

.conn-speed {
  position:absolute;
  bottom:-18px; left:50%;
  transform:translateX(-50%);
  font-size:9px;
  color:var(--accent-cyan);
  font-family:'JetBrains Mono',monospace;
  white-space:nowrap;
}

/* ─── FOOTER ─── */
.footer {
  padding: 14px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  color: var(--text-muted);
  background: var(--bg-secondary);
}

.footer-viridor {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar { width:6px; }
::-webkit-scrollbar-track { background:transparent; }
::-webkit-scrollbar-thumb { background:var(--border); border-radius:3px; }
::-webkit-scrollbar-thumb:hover { background:var(--border-light); }

/* ─── MOBILE MENU TOGGLE ─── */
.mobile-menu-btn {
  display: none;
  width: 36px; height: 36px;
  border-radius: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  flex-shrink: 0;
}

.mobile-menu-btn span {
  display: block;
  width: 18px; height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all 0.3s;
}

.mobile-menu-btn.active span:nth-child(1) { transform: rotate(45deg) translate(4px,4px); }
.mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.active span:nth-child(3) { transform: rotate(-45deg) translate(4px,-4px); }

/* Sidebar overlay for mobile */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 89;
}

.sidebar-overlay.active { display: block; }

/* ─── RESPONSIVE — TABLET (max 1200px) ─── */
@media (max-width:1200px) {
  .stats-row { grid-template-columns: repeat(3, 1fr); }
  .portal-title { display: none; }
}

/* ─── RESPONSIVE — SMALL TABLET (max 900px) ─── */
@media (max-width:900px) {
  .mobile-menu-btn { display: flex; }

  .header { padding: 0 12px; height: 56px; }
  .header-left { gap: 10px; }
  .header-nav { display: none; }
  .portal-title { display: none; }

  .logo-group img { height: 28px; }
  .viridor-logo-text { font-size: 14px; letter-spacing: 2px; }
  .viridor-logo-sub { font-size: 7px; }
  .logo-divider { height: 24px; }

  .header-right { gap: 8px; }
  .gateway-indicator { display: none; }
  .time-display { display: none; }

  /* Sidebar becomes a slide-out drawer */
  .sidebar {
    position: fixed;
    top: 56px;
    left: 0;
    bottom: 0;
    width: 260px;
    z-index: 90;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    overflow-y: auto;
    box-shadow: 4px 0 24px rgba(0,0,0,0.3);
  }

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

  /* Show nav links in sidebar when mobile */
  .sidebar .mobile-nav {
    display: block;
    padding: 0 10px;
    margin-bottom: 12px;
  }

  .sidebar .mobile-nav a {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 10px 10px;
    border-radius: 7px;
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s;
  }

  .sidebar .mobile-nav a:hover { background: var(--bg-card); color: var(--text-primary); }
  .sidebar .mobile-nav a.active { background: rgba(59,130,246,0.1); color: var(--accent-blue); }

  .main-layout { min-height: calc(100vh - 56px); }
  .content { padding: 14px; max-height: calc(100vh - 56px); }
  .stats-row { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .stat-value { font-size: 20px; }

  .page-header { flex-direction: column; align-items: flex-start; gap: 10px; }

  /* Topology vertical on mobile */
  .topology { flex-direction: column; gap: 0; padding: 10px 0; }
  .topology-node { min-width: auto; }
  .topology-connector {
    width: 2px; height: 40px;
    margin: 0; margin-left: 0; margin-right: 0;
    background: linear-gradient(180deg, var(--accent-blue), var(--accent-cyan));
  }
  .topology-connector::after {
    right: auto; top: auto;
    bottom: -4px; left: -4px;
    border-right: none; border-top: none;
    border-bottom: 2px solid var(--accent-cyan);
    border-left: 2px solid var(--accent-cyan);
    transform: rotate(-45deg);
  }
  .conn-label {
    top: 50%; left: auto; right: -8px;
    transform: translateX(100%) translateY(-50%);
    white-space: nowrap;
  }
  .conn-speed {
    bottom: auto; top: 50%; left: auto; right: -8px;
    transform: translateX(100%) translateY(50%);
    display: none; /* hide speed on mobile for cleanliness */
  }

  .footer { flex-direction: column; gap: 6px; text-align: center; padding: 10px 12px; }
}

/* ─── RESPONSIVE — PHONE (max 640px) ─── */
@media (max-width:640px) {
  .header { height: 50px; padding: 0 10px; }
  .logo-group { gap: 8px; }
  .logo-group img { height: 24px; }
  .viridor-logo-text { font-size: 12px; letter-spacing: 1.5px; }
  .viridor-logo-sub { display: none; }
  .logo-divider { height: 20px; }
  .theme-toggle span:not(.theme-icon) { display: none; }
  .theme-toggle { padding: 5px 8px; }
  .logout-btn { font-size: 12px; padding: 4px 8px; }

  .sidebar { top: 50px; }
  .main-layout { min-height: calc(100vh - 50px); }
  .content { padding: 10px; max-height: calc(100vh - 50px); }

  .stats-row { grid-template-columns: 1fr 1fr; gap: 8px; }
  .stat-card { padding: 12px; }
  .stat-value { font-size: 18px; }
  .stat-label { font-size: 9px; }
  .stat-change { font-size: 10px; }

  .card { padding: 14px; border-radius: 10px; }
  .card-header { flex-direction: column; align-items: flex-start; gap: 8px; }

  .page-title { font-size: 16px; }
  .page-subtitle { font-size: 11px; }

  .badge { font-size: 10px; padding: 2px 8px; }
  .btn { padding: 7px 12px; font-size: 12px; }
  .btn-sm { padding: 5px 8px; font-size: 11px; }

  /* Tables horizontal scroll */
  .data-table { min-width: 600px; }
  .fleet-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }

  .topology-icon { width: 48px; height: 48px; font-size: 20px; border-radius: 12px; }
  .topology-label { font-size: 11px; }
  .topology-connector { height: 30px; }
}

/* ─── RESPONSIVE — SMALL PHONE (max 400px) ─── */
@media (max-width:400px) {
  .stats-row { grid-template-columns: 1fr; }
  .user-avatar { width: 28px; height: 28px; font-size: 10px; }
}