/* ==========================================================================
   GRE Tunnel Manager - Ultra-light Modern Dark Theme CSS (< 12KB)
   ========================================================================== */

:root {
  --bg-main: #0b0f19;
  --bg-card: #131b2e;
  --bg-card-hover: #18223a;
  --bg-input: #1b2640;
  --border-color: #243354;
  --border-focus: #3b82f6;

  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --purple: #a855f7;
  --cyan: #06b6d4;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.5;
  font-size: 14px;
  min-height: 100vh;
}

/* ================= Navbar ================= */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #2563eb, #06b6d4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}

.brand-title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-main);
  display: block;
}

.brand-subtitle {
  font-size: 11px;
  color: var(--text-muted);
  display: block;
}

.nav-metrics {
  display: flex;
  align-items: center;
  gap: 16px;
}

.metric-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  border-radius: var(--radius-md);
  font-size: 12px;
}

.chip-label {
  color: var(--text-dim);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 10px;
}

.chip-value {
  font-weight: 600;
  color: var(--text-main);
}

.chip-value.highlight {
  color: var(--cyan);
}

.mini-meter {
  width: 36px;
  height: 6px;
  background: var(--border-color);
  border-radius: 3px;
  overflow: hidden;
}

.mini-bar {
  height: 100%;
  background: var(--primary);
  transition: width 0.3s ease;
}

.mini-bar.ram-bar {
  background: var(--purple);
}

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

/* ================= Buttons ================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 13px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease-in-out;
  text-decoration: none;
  color: var(--text-main);
}

.btn-primary {
  background-color: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background-color: var(--primary-hover);
}

.btn-secondary {
  background-color: var(--bg-input);
  border-color: var(--border-color);
}
.btn-secondary:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--text-dim);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--border-color);
}
.btn-outline:hover {
  background-color: var(--bg-input);
  border-color: var(--text-muted);
}

.btn-danger {
  background-color: var(--danger);
  color: #fff;
}
.btn-danger:hover {
  background-color: #dc2626;
}

.btn-sm {
  padding: 4px 8px;
  font-size: 11px;
  border-radius: 4px;
}

.btn-lg {
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
}

.btn-block {
  width: 100%;
}

/* ================= Main Layout ================= */
.main-content {
  max-width: 1300px;
  margin: 0 auto;
  padding: 24px;
}

/* ================= Stats Grid ================= */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.stat-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-blue { background: rgba(59, 130, 246, 0.15); color: var(--primary); }
.icon-green { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.icon-purple { background: rgba(168, 85, 247, 0.15); color: var(--purple); }
.icon-cyan { background: rgba(6, 182, 212, 0.15); color: var(--cyan); }

.stat-title {
  font-size: 12px;
  color: var(--text-muted);
}

.stat-value {
  font-size: 18px;
  font-weight: 700;
}

.stat-sub {
  font-size: 12px;
  font-weight: 400;
  color: var(--success);
  margin-left: 4px;
}

.text-green { color: var(--success); }
.text-purple { color: var(--purple); }
.text-blue { color: var(--primary); }
.text-yellow { color: var(--warning); }
.text-muted { color: var(--text-muted); }

/* ================= Section Header ================= */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 12px;
}

.section-title-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-title {
  font-size: 18px;
  font-weight: 600;
}

.live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--success);
  box-shadow: 0 0 8px var(--success);
  display: inline-block;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.controls-bar {
  display: flex;
  align-items: center;
  gap: 10px;
}

.search-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 13px;
  width: 240px;
  outline: none;
}
.search-box:focus {
  border-color: var(--border-focus);
}

.view-toggle {
  display: flex;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.view-btn {
  background: var(--bg-card);
  border: none;
  color: var(--text-muted);
  padding: 8px 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
}
.view-btn.active {
  background: var(--bg-input);
  color: var(--primary);
}

/* ================= Tunnel Cards Grid ================= */
.tunnels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 16px;
}

.tunnel-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.15s, border-color 0.15s;
}

.tunnel-card:hover {
  border-color: #3b507a;
  transform: translateY(-2px);
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.tunnel-name-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.tunnel-name {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
}

.badge {
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-up { background: rgba(16, 185, 129, 0.2); color: var(--success); border: 1px solid rgba(16, 185, 129, 0.4); }
.badge-down { background: rgba(239, 68, 68, 0.2); color: var(--danger); border: 1px solid rgba(239, 68, 68, 0.4); }
.badge-purple { background: rgba(168, 85, 247, 0.2); color: var(--purple); }
.badge-nat-on { background: rgba(6, 182, 212, 0.2); color: var(--cyan); border: 1px solid rgba(6, 182, 212, 0.4); }
.badge-nat-off { background: rgba(100, 116, 139, 0.2); color: var(--text-dim); border: 1px solid rgba(100, 116, 139, 0.4); }

.card-comment {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: -6px;
}

.card-endpoints {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-main);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  font-size: 12px;
}

.endpoint-ip {
  font-family: monospace;
  font-weight: 600;
}

.endpoint-arrow {
  color: var(--text-dim);
}

.card-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-muted);
}

.meta-item b {
  color: var(--text-main);
}

/* Speed Meters on Card */
.card-gauges {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  background: rgba(0, 0, 0, 0.2);
  padding: 10px;
  border-radius: var(--radius-sm);
}

.gauge-item {
  display: flex;
  flex-direction: column;
}

.gauge-item-title {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
}

.gauge-item-speed {
  font-size: 16px;
  font-weight: 700;
}

.card-traffic-summary {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 8px;
}

.card-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 4px;
  gap: 6px;
}

.card-actions-left {
  display: flex;
  align-items: center;
  gap: 6px;
}

.card-actions-right {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Switch Toggle */
.switch {
  position: relative;
  display: inline-block;
  width: 36px;
  height: 20px;
}

.switch input { opacity: 0; width: 0; height: 0; }

.slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: var(--border-color);
  transition: .3s;
  border-radius: 20px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 14px;
  width: 14px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .3s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--success);
}

input:checked + .slider:before {
  transform: translateX(16px);
}

/* ================= Table View ================= */
.tunnels-table-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow-x: auto;
}

.tunnels-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.tunnels-table th, .tunnels-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  font-size: 13px;
}

.tunnels-table th {
  background: var(--bg-main);
  color: var(--text-dim);
  font-size: 11px;
  text-transform: uppercase;
  font-weight: 600;
}

.tunnels-table tbody tr:hover {
  background: var(--bg-card-hover);
}

/* ================= Modals ================= */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
}

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

.modal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 540px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 24px;
  box-shadow: var(--shadow);
  transform: scale(0.95);
  transition: transform 0.2s ease;
}

.modal-overlay.active .modal-card {
  transform: scale(1);
}

.modal-card.modal-lg {
  max-width: 800px;
}

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

.modal-header h3 {
  font-size: 17px;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 24px;
  cursor: pointer;
  line-height: 1;
}
.modal-close:hover { color: var(--text-main); }

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 24px;
}

/* Form Styles */
.form-group {
  margin-bottom: 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
}

.form-group input,
.form-group select {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 13px;
  outline: none;
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--border-focus);
}

.form-hint {
  font-size: 11px;
  color: var(--text-dim);
}

.form-row {
  display: flex;
  gap: 12px;
}
.form-row .form-group {
  flex: 1;
}

.input-with-presets {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.preset-pills {
  display: flex;
  gap: 6px;
}

.preset-pill {
  font-size: 11px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  padding: 2px 8px;
  border-radius: 10px;
  cursor: pointer;
  color: var(--cyan);
}
.preset-pill:hover {
  background: var(--primary);
  color: #fff;
}

.form-checkbox {
  margin: 14px 0;
  display: flex;
  align-items: center;
}

.form-checkbox label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 13px;
}

/* ================= MikroTik BTest Styles ================= */
.btest-config-panel {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px;
  margin-bottom: 16px;
}

.btest-actions {
  display: flex;
  justify-content: center;
  margin-top: 10px;
}

.telemetry-gauges {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}

.gauge-card {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px;
  text-align: center;
}

.gauge-label {
  font-size: 10px;
  font-weight: 700;
  color: var(--text-dim);
  letter-spacing: 0.5px;
}

.gauge-speed {
  font-size: 24px;
  font-weight: 800;
  margin: 4px 0;
}

.gauge-unit {
  font-size: 13px;
  font-weight: 500;
}

.gauge-sub {
  font-size: 11px;
  color: var(--text-dim);
}

.progress-bar-wrap {
  width: 100%;
  height: 6px;
  background: var(--border-color);
  border-radius: 3px;
  margin-top: 8px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--primary);
  transition: width 0.3s ease;
}

.chart-container {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px;
  position: relative;
  margin-bottom: 12px;
}

.chart-container canvas {
  width: 100% !important;
  height: 160px !important;
  display: block;
}

.chart-legend {
  display: flex;
  justify-content: center;
  gap: 16px;
  font-size: 11px;
  margin-top: 6px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.dot-green { background-color: var(--success); }
.dot-purple { background-color: var(--purple); }

.status-banner {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  text-align: center;
}

.status-banner.info { background: rgba(59, 130, 246, 0.15); color: #93c5fd; border: 1px solid rgba(59, 130, 246, 0.3); }
.status-banner.error { background: rgba(239, 68, 68, 0.15); color: #fca5a5; border: 1px solid rgba(239, 68, 68, 0.3); }
.status-banner.success { background: rgba(16, 185, 129, 0.15); color: #6ee7b7; border: 1px solid rgba(16, 185, 129, 0.3); }

/* ================= Ping Styles ================= */
.ping-stats-row {
  display: flex;
  gap: 12px;
  margin: 16px 0;
}

.ping-stat {
  flex: 1;
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  padding: 10px;
  border-radius: var(--radius-sm);
  text-align: center;
}

.p-lbl {
  font-size: 10px;
  color: var(--text-dim);
  text-transform: uppercase;
  display: block;
}

.p-val {
  font-size: 15px;
  font-weight: 700;
  display: block;
}

.terminal-box {
  background: #060911;
  border: 1px solid var(--border-color);
  padding: 12px;
  border-radius: var(--radius-sm);
  font-family: monospace;
  font-size: 12px;
  color: #38bdf8;
  max-height: 180px;
  overflow-y: auto;
  white-space: pre-wrap;
}

/* ================= Tabs ================= */
.tab-bar {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 16px;
}

.tab-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 2px solid transparent;
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.tab-pane { display: none; }
.tab-pane.active { display: block; }

.divider {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 16px 0;
}

/* ================= Login Page ================= */
.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.login-container {
  width: 100%;
  max-width: 380px;
  padding: 16px;
}

.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow);
}

.login-brand {
  text-align: center;
  margin-bottom: 24px;
}

.login-icon {
  width: 54px;
  height: 54px;
  margin: 0 auto 12px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #2563eb, #06b6d4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}

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

.login-subtitle {
  font-size: 12px;
  color: var(--text-dim);
}

.login-error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  margin-bottom: 12px;
}

.login-footer {
  text-align: center;
  margin-top: 20px;
  color: var(--text-dim);
  font-size: 12px;
}

/* ================= Toast Notifications ================= */
#toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 9999;
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 8px;
  animation: slideIn 0.2s ease;
  min-width: 240px;
}

.toast.success { border-left: 4px solid var(--success); }
.toast.error { border-left: 4px solid var(--danger); }
.toast.info { border-left: 4px solid var(--primary); }

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

.hidden { display: none !important; }

/* Responsive adjustments */
@media (max-width: 768px) {
  .navbar { flex-direction: column; gap: 12px; align-items: flex-start; }
  .nav-metrics { flex-wrap: wrap; width: 100%; }
  .nav-actions { width: 100%; justify-content: flex-end; }
  .stats-grid { grid-template-columns: 1fr; }
  .tunnels-grid { grid-template-columns: 1fr; }
  .telemetry-gauges { grid-template-columns: 1fr; }
}