:root {
  --bg-primary: #0a0f1a;
  --bg-secondary: #0f1627;
  --bg-card: rgba(15, 22, 39, 0.8);
  --text-primary: #ffffff;
  --text-secondary: #8892a4;
  --accent-cyan: #00d4ff;
  --accent-green: #00ff88;
  --accent-orange: #ff9500;
  --accent-red: #ff5555;
  --glass-border: rgba(255, 255, 255, 0.08);
}

.light {
  --bg-primary: #f0f4f8;
  --bg-secondary: #e2e8f0;
  --bg-card: rgba(255, 255, 255, 0.9);
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --glass-border: rgba(0, 0, 0, 0.08);
}

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

body {
  font-family: 'Space Grotesk', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  transition: all 0.3s ease;
}

body.dark {
  background: linear-gradient(135deg, #0a0f1a 0%, #1a1040 50%, #0a0f1a 100%);
}

body.light {
  background: linear-gradient(135deg, #f0f4f8 0%, #e2e8f0 50%, #f0f4f8 100%);
}

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.header {
  background: linear-gradient(135deg, #0f1627 0%, #1a1040 100%);
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--glass-border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
}

.light .header {
  background: linear-gradient(135deg, rgba(255,255,255,0.95) 0%, rgba(226,232,240,0.95) 100%);
}

.header-content {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.wave-container {
  position: relative;
  width: 32px;
  height: 32px;
}

.wave {
  position: absolute;
  border: 2px solid var(--accent-cyan);
  border-radius: 50%;
  animation: pulse 2s ease-out infinite;
}

.wave1 { width: 12px; height: 12px; top: 10px; left: 10px; animation-delay: 0s; }
.wave2 { width: 20px; height: 20px; top: 6px; left: 6px; animation-delay: 0.3s; }
.wave3 { width: 28px; height: 28px; top: 2px; left: 2px; animation-delay: 0.6s; }

@keyframes pulse {
  0% { opacity: 1; transform: scale(1); }
  100% { opacity: 0; transform: scale(1.5); }
}

.title {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  font-size: 1.2rem;
  cursor: pointer;
  transition: all 0.3s ease;
}

.theme-toggle:hover {
  transform: scale(1.1);
}

/* Main Content */
.main {
  flex: 1;
  padding: 1rem;
  max-width: 600px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Cards */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 1.25rem;
  transition: all 0.3s ease;
}

.card:hover {
  border-color: rgba(0, 212, 255, 0.2);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Hero Card */
.hero-card {
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(0, 212, 255, 0.05) 100%);
}

.hero-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.connection-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 2rem;
  font-weight: 700;
  padding: 0.75rem 1.5rem;
  border-radius: 12px;
  letter-spacing: 0.1em;
}

/* Signal Bars */
.signal-bars {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 40px;
}

.signal-bar {
  width: 8px;
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.stat-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  padding: 0.75rem;
  position: relative;
}

.stat-card.copyable {
  cursor: pointer;
  transition: all 0.2s ease;
}

.stat-card.copyable:hover {
  background: rgba(0, 212, 255, 0.1);
}

.stat-label {
  font-size: 0.7rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

.stat-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.stat-unit {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.copied-toast {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--accent-green);
  color: #000;
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translate(-50%, -50%) scale(0.8); }
  to { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

/* Live Indicator */
.live-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-green);
}

.pulsing-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-secondary);
}

.pulsing-dot.active {
  background: var(--accent-green);
  animation: pulseDot 1.5s ease infinite;
}

@keyframes pulseDot {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0, 255, 136, 0.4); }
  50% { box-shadow: 0 0 0 8px rgba(0, 255, 136, 0); }
}

/* Toggle Switch */
.toggle-label {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 26px;
}

.toggle-label input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 26px;
  transition: 0.3s;
}

.toggle-slider:before {
  content: '';
  position: absolute;
  height: 20px;
  width: 20px;
  left: 3px;
  bottom: 3px;
  background: white;
  border-radius: 50%;
  transition: 0.3s;
}

input:checked + .toggle-slider {
  background: var(--accent-green);
}

input:checked + .toggle-slider:before {
  transform: translateX(22px);
}

/* Location Info */
.location-info {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem;
  border-radius: 8px;
  transition: background 0.2s ease;
}

.info-row.copyable:hover {
  background: rgba(0, 212, 255, 0.1);
  cursor: pointer;
}

.info-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.info-value {
  color: var(--text-primary);
}

.mono {
  font-family: 'JetBrains Mono', monospace;
}

.location-error {
  text-align: center;
  padding: 1rem;
  color: var(--text-secondary);
}

/* Speed Test */
.speed-test-btn {
  width: 100%;
  padding: 1rem 2rem;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-green) 100%);
  color: #000;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.speed-test-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

.speed-test-btn:disabled {
  cursor: not-allowed;
}

.speed-test-btn.testing {
  background: var(--bg-secondary);
  color: var(--accent-cyan);
}

.radar-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
}

.radar-sweep {
  width: 24px;
  height: 24px;
  border: 2px solid var(--accent-cyan);
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 1s linear infinite;
}

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

.speed-results {
  margin-top: 1rem;
}

.results-title {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.speed-test-result {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 8px;
  margin-bottom: 0.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
}

.speed-test-time {
  color: var(--text-secondary);
}

.speed-test-stats {
  display: flex;
  gap: 1rem;
}

.speed-test-stats span:first-child { color: var(--accent-green); }
.speed-test-stats span:nth-child(2) { color: var(--accent-cyan); }
.speed-test-stats span:last-child { color: var(--accent-orange); }

/* Carrier Grid */
.carrier-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.carrier-button {
  display: block;
  padding: 0.875rem;
  text-align: center;
  color: white;
  text-decoration: none;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.3s ease;
}

.carrier-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.carrier-button:last-child:nth-child(odd) {
  grid-column: span 2;
}

/* History */
.history-actions {
  display: flex;
  gap: 0.5rem;
}

.action-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  padding: 0.5rem;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.action-btn:hover {
  background: rgba(0, 212, 255, 0.1);
}

.history-list {
  max-height: 300px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.history-entry {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 0.75rem;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 8px;
  border-left: 3px solid;
  font-size: 0.85rem;
}

.history-time {
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-secondary);
}

.history-type {
  font-weight: 600;
}

.history-details {
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-secondary);
}

.empty-state {
  text-align: center;
  padding: 2rem;
  color: var(--text-secondary);
}

/* Disclaimer */
.disclaimer-card {
  padding: 0;
  overflow: hidden;
}

.disclaimer-toggle {
  width: 100%;
  padding: 1rem 1.25rem;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.chevron {
  font-size: 1.2rem;
  transition: transform 0.3s ease;
}

.chevron.open {
  transform: rotate(90deg);
}

.disclaimer-content {
  padding: 0 1.25rem 1.25rem;
  animation: slideDown 0.3s ease;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

.disclaimer-content ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.disclaimer-content li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.disclaimer-content li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--accent-orange);
}

/* Footer */
.footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.85rem;
  border-top: 1px solid var(--glass-border);
  background: var(--bg-card);
}

.footer a {
  color: var(--accent-cyan);
  text-decoration: none;
  font-weight: 500;
}

.footer a:hover {
  text-decoration: underline;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Responsive */
@media (max-width: 480px) {
  .header-content {
    padding: 0;
  }
  
  .title {
    font-size: 1.25rem;
  }
  
  .connection-badge {
    font-size: 1.5rem;
    padding: 0.5rem 1rem;
  }
  
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .carrier-grid {
    grid-template-columns: 1fr;
  }
  
  .carrier-button:last-child:nth-child(odd) {
    grid-column: span 1;
  }
}