:root {
  --bg-main: #0b0f17;
  --bg-card: rgba(18, 24, 38, 0.75);
  --bg-card-hover: rgba(26, 34, 52, 0.85);
  --bg-input: rgba(11, 15, 23, 0.8);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: #f59e0b;

  --primary: #f59e0b;
  --primary-hover: #d97706;
  --primary-glow: rgba(245, 158, 11, 0.25);

  --accent-green: #10b981;
  --accent-green-glow: rgba(16, 185, 129, 0.2);
  --accent-red: #ef4444;
  --accent-blue: #3b82f6;

  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-subtle: #6b7280;

  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
}

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

body {
  font-family: var(--font-sans);
  background: var(--bg-main);
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(245, 158, 11, 0.06) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(16, 185, 129, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.03) 0%, transparent 60%);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Glass panel */
.glass-panel {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn:active {
  transform: scale(0.98);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

.btn-primary {
  background: linear-gradient(135deg, #f59e0b, #ea580c);
  color: #fff;
  box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, #fbbf24, #f97316);
  box-shadow: 0 6px 20px var(--primary-glow);
}

.btn-success {
  background: linear-gradient(135deg, #10b981, #059669);
  color: #fff;
  box-shadow: 0 4px 14px var(--accent-green-glow);
}

.btn-success:hover:not(:disabled) {
  background: linear-gradient(135deg, #34d399, #10b981);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-danger:hover:not(:disabled) {
  background: #ef4444;
  color: #fff;
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
}

.btn-ghost:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-main);
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.85rem;
}

.btn-xs {
  padding: 4px 10px;
  font-size: 0.78rem;
}

/* Auth Page */
.auth-body {
  display: flex;
  align-items: center;
  justify-content: center;
}

.auth-wrapper {
  width: 100%;
  max-width: 440px;
  padding: 24px;
}

.auth-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 700;
  color: #f59e0b;
  margin-bottom: 20px;
}

.auth-title {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.auth-subtitle {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 28px;
}

.auth-form .form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.input-wrapper input,
.form-group input {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: all 0.2s ease;
}

.input-wrapper input:focus,
.form-group input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.auth-footer {
  margin-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-subtle);
}

.auth-footer code {
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 6px;
  border-radius: 4px;
  color: #f59e0b;
  font-family: var(--font-mono);
}

/* Alert Box */
.alert-box {
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  margin-bottom: 18px;
}

.alert-error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}

/* Navbar */
.navbar {
  border-bottom: 1px solid var(--border-color);
  background: rgba(11, 15, 23, 0.8);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.brand-flame {
  font-size: 1.8rem;
  filter: drop-shadow(0 0 10px rgba(245, 158, 11, 0.4));
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  display: block;
}

.brand-tag {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  display: block;
}

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

.live-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  color: #10b981;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 8px #10b981;
  animation: pulse 1.8s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.7; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.7; }
}

/* Layout */
.main-content {
  padding: 32px 24px 60px;
}

.content-container {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.metric-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.2s, border-color 0.2s;
}

.metric-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.15);
}

.metric-highlight {
  border-color: rgba(16, 185, 129, 0.3);
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.08), rgba(18, 24, 38, 0.8));
}

.metric-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.metric-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.metric-icon {
  font-size: 1.2rem;
}

.metric-body {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.metric-value {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #fff;
}

.metric-sub {
  font-size: 0.85rem;
  color: var(--text-subtle);
}

.slots-progress-bar {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  overflow: hidden;
  margin-top: 4px;
}

.slots-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #10b981, #059669);
  transition: width 0.4s ease;
}

.engine-badge {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
}

.engine-badge.active {
  background: rgba(16, 185, 129, 0.18);
  border: 1px solid rgba(16, 185, 129, 0.35);
  color: #34d399;
  box-shadow: 0 0 14px rgba(16, 185, 129, 0.25);
  animation: pulse 2s infinite;
}

/* Control Panel */
.control-panel {
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.panel-heading {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.panel-sub {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.control-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* Sessions Grid */
.sessions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.session-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 18px;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

.session-card:hover {
  border-color: rgba(255, 255, 255, 0.18);
  transform: translateY(-2px);
}

.session-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.session-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 4px;
  color: #fff;
}

.session-id {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-subtle);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
}

.status-connected {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #34d399;
}

.status-waiting_qr {
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: #fbbf24;
}

.status-connecting, .status-reconnecting {
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: #60a5fa;
}

.status-logged_out, .status-disconnected, .status-error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #f87171;
}

.session-card-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.session-detail-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.88rem;
}

.session-label {
  color: var(--text-muted);
}

.session-val {
  font-weight: 600;
  font-family: var(--font-mono);
  color: #fff;
}

.session-card-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
}

/* Empty slots card */
.empty-slot-card {
  border: 2px dashed rgba(255, 255, 255, 0.12);
  background: rgba(18, 24, 38, 0.3);
  border-radius: var(--radius-md);
  padding: 32px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  min-height: 220px;
}

.empty-slot-card:hover {
  border-color: var(--primary);
  background: rgba(245, 158, 11, 0.04);
}

.empty-slot-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--text-muted);
}

.empty-slot-title {
  font-size: 1rem;
  font-weight: 700;
}

.empty-slot-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* Terminal Section */
.terminal-section {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.terminal-dots {
  display: flex;
  align-items: center;
  gap: 6px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #10b981; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.terminal-body {
  background: #070a0f;
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  min-height: 180px;
  max-height: 300px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.log-line {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  word-break: break-word;
}

.log-time {
  color: var(--text-subtle);
  flex-shrink: 0;
}

.log-tag {
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 700;
  flex-shrink: 0;
}

.tag-info {
  background: rgba(59, 130, 246, 0.2);
  color: #60a5fa;
}

.tag-message {
  background: rgba(16, 185, 129, 0.25);
  color: #34d399;
}

.tag-warning {
  background: rgba(245, 158, 11, 0.2);
  color: #fbbf24;
}

.tag-error {
  background: rgba(239, 68, 68, 0.25);
  color: #f87171;
}

.log-msg {
  color: var(--text-main);
}

/* Modals */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-card {
  background: #111726;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 460px;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

.modal-qr {
  max-width: 400px;
  text-align: center;
}

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

.modal-header h3 {
  font-size: 1.15rem;
  font-weight: 700;
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
}

.modal-close:hover {
  color: #fff;
}

.modal-body {
  padding: 24px;
}

.modal-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 18px;
  line-height: 1.5;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  background: rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
}

/* QR Code Container */
.qr-modal-body {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.qr-container {
  width: 250px;
  height: 250px;
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 10px 0 16px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.qr-container img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.qr-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  color: #111;
  font-size: 0.85rem;
  font-weight: 600;
}

.qr-subtext {
  font-size: 0.8rem;
  color: var(--text-subtle);
}

/* Spinner */
.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid rgba(245, 158, 11, 0.2);
  border-top-color: #f59e0b;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-state {
  grid-column: 1 / -1;
  padding: 60px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  color: var(--text-muted);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-container {
    padding: 14px 16px;
  }
  .main-content {
    padding: 20px 16px 40px;
  }
  .control-panel {
    flex-direction: column;
    align-items: stretch;
  }
  .control-right {
    flex-direction: column;
  }
  .control-right .btn {
    width: 100%;
  }
}