:root {
  --bg-primary: #0b0f19;
  --bg-card: rgba(22, 30, 49, 0.75);
  --bg-card-hover: rgba(30, 41, 67, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-active: rgba(99, 102, 241, 0.4);
  --accent-primary: #6366f1;
  --accent-glow: rgba(99, 102, 241, 0.25);
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  min-height: 100vh;
  padding-bottom: 90px;
  overflow-x: hidden;
  user-select: none;
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(16, 185, 129, 0.08) 0%, transparent 40%);
  background-attachment: fixed;
}

.container {
  max-width: 480px;
  margin: 0 auto;
  padding: 16px;
}

/* Glass Cards */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 18px;
  margin-bottom: 16px;
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-card:active {
  transform: scale(0.99);
}

/* Badges */
.badge-active {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 4px 10px;
  border-radius: 9999px;
  font-size: 12px;
  font-weight: 600;
}

.badge-inactive {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(244, 63, 94, 0.15);
  color: #fb7185;
  border: 1px solid rgba(244, 63, 94, 0.3);
  padding: 4px 10px;
  border-radius: 9999px;
  font-size: 12px;
  font-weight: 600;
}

/* Tariff Cards */
.tariff-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}

.tariff-card {
  position: relative;
  background: var(--bg-card);
  border: 1.5px solid var(--border-color);
  border-radius: 18px;
  padding: 16px;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
}

.tariff-card.selected {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.12);
  box-shadow: 0 0 20px var(--accent-glow);
}

.tariff-badge {
  position: absolute;
  top: -9px;
  right: 10px;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: white;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 10px rgba(99, 102, 241, 0.4);
}

/* Action Buttons */
.btn-primary {
  width: 100%;
  background: linear-gradient(135deg, #6366f1, #4f46e5);
  color: white;
  border: none;
  border-radius: 16px;
  padding: 14px 20px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 8px 25px -5px rgba(99, 102, 241, 0.5);
  transition: all 0.2s ease;
}

.btn-primary:active {
  transform: scale(0.98);
  box-shadow: 0 4px 15px -3px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.btn-secondary:active {
  background: rgba(255, 255, 255, 0.15);
  transform: scale(0.98);
}

/* App Link Badges */
.app-button-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 12px;
}

.app-button {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 10px 12px;
  text-decoration: none;
  color: var(--text-main);
  font-size: 13px;
  font-weight: 500;
  transition: all 0.2s ease;
}

.app-button:active {
  background: rgba(255, 255, 255, 0.1);
  transform: scale(0.98);
}

/* Bottom Navigation */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(11, 15, 25, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-around;
  padding: 10px 8px 14px 8px;
  z-index: 1000;
  max-width: 500px;
  margin: 0 auto;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  flex: 1;
  transition: all 0.2s ease;
}

.nav-item.active {
  color: var(--accent-primary);
}

.nav-item svg {
  width: 22px;
  height: 22px;
}

/* Toast Notifications */
#toast {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(-100px);
  background: rgba(30, 41, 59, 0.95);
  backdrop-filter: blur(10px);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 10px 20px;
  border-radius: 9999px;
  font-size: 14px;
  font-weight: 500;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  z-index: 9999;
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  display: flex;
  align-items: center;
  gap: 8px;
}

#toast.show {
  transform: translateX(-50%) translateY(0);
}

/* Modal Popup */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: #161e31;
  border: 1px solid var(--border-color);
  border-radius: 24px;
  width: 100%;
  max-width: 440px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  padding: 22px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
  transform: scale(0.95);
  transition: transform 0.25s ease;
}

.modal-body {
  overflow-y: auto;
  max-height: 60vh;
  padding-right: 4px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-muted);
}

.modal-body p {
  margin-bottom: 12px;
}

.modal-body h4 {
  color: var(--text-main);
  font-size: 14px;
  margin-top: 14px;
  margin-bottom: 6px;
}

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

/* Live Pulse */
.pulse-green {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulseGreen 2s infinite;
}

@keyframes pulseGreen {
  0% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}