:root {
  --bg-primary: #0d1117;
  --bg-card: rgba(22, 27, 34, 0.75);
  --bg-glass: rgba(30, 41, 59, 0.6);
  --border-color: rgba(255, 255, 255, 0.08);
  --text-primary: #f0f6fc;
  --text-secondary: #8b949e;
  --accent-color: #38bdf8;
  --accent-gradient: linear-gradient(135deg, #38bdf8 0%, #6366f1 100%);
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: var(--font-family);
  -webkit-tap-highlight-color: transparent;
}

body {
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(56, 189, 248, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(99, 102, 241, 0.08) 0%, transparent 40%);
  color: var(--text-primary);
  min-height: 100vh;
  padding: 16px;
  overflow-x: hidden;
}

.app-container {
  max-width: 480px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 4px;
}

.logo-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.5px;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--success-color);
  background: rgba(16, 185, 129, 0.12);
  padding: 4px 10px;
  border-radius: 20px;
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.pulse-dot {
  width: 6px;
  height: 6px;
  background-color: var(--success-color);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--success-color);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

/* Search Box */
.search-section {
  width: 100%;
}

.search-box {
  display: flex;
  gap: 8px;
  background: var(--bg-card);
  padding: 6px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

.search-box input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 0.95rem;
  padding: 8px 12px;
}

.search-box input::placeholder {
  color: var(--text-secondary);
}

.glow-button {
  background: var(--accent-gradient);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  padding: 10px 18px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  box-shadow: 0 2px 10px rgba(56, 189, 248, 0.3);
}

.glow-button:active {
  transform: scale(0.97);
}

/* Panels */
.glass-panel {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(16px);
  padding: 18px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.card-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
  animation: fadeIn 0.35s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Card Header */
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 20px;
}

.carrier-tag {
  font-size: 0.75rem;
  color: var(--accent-color);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.tracking-code {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.copy-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 0.85rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: background 0.2s;
}

.copy-btn:hover {
  background: rgba(255, 255, 255, 0.12);
}

/* Progress Stepper */
.delivery-progress-container {
  position: relative;
  margin: 24px 0 28px;
}

.progress-bar-bg {
  position: absolute;
  top: 18px;
  left: 20px;
  right: 20px;
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  z-index: 1;
}

.progress-bar-fill {
  height: 100%;
  background: var(--accent-gradient);
  border-radius: 4px;
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-steps {
  position: relative;
  display: flex;
  justify-content: space-between;
  z-index: 2;
}

.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.step-circle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 2px solid rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  font-weight: 700;
  transition: all 0.3s;
}

.step.step-active .step-circle {
  border-color: var(--accent-color);
  background: rgba(56, 189, 248, 0.15);
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.4);
}

.step.step-completed .step-circle {
  border-color: var(--success-color);
  background: rgba(16, 185, 129, 0.15);
}

.step-label {
  font-size: 0.7rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.step.step-active .step-label {
  color: var(--text-primary);
  font-weight: 600;
}

/* Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 16px;
}

.metric-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.metric-label {
  font-size: 0.72rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.metric-value {
  font-size: 0.95rem;
  font-weight: 600;
  word-break: break-word;
}

.metric-value.highlight {
  color: var(--accent-color);
}

/* Timeline */
.section-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.timeline-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  padding-left: 20px;
}

.timeline-list::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: rgba(255, 255, 255, 0.1);
}

.timeline-item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.timeline-dot {
  position: absolute;
  left: -20px;
  top: 4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-color);
  border: 2px solid var(--bg-primary);
}

.timeline-date {
  font-size: 0.75rem;
  color: var(--accent-color);
  font-weight: 600;
}

.timeline-desc {
  font-size: 0.88rem;
  color: var(--text-primary);
  line-height: 1.35;
}

.timeline-loc {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* Empty State */
.empty-placeholder {
  text-align: center;
  padding: 48px 16px;
  color: var(--text-secondary);
}

.empty-placeholder h3 {
  color: var(--text-primary);
  font-size: 1.1rem;
  margin-bottom: 6px;
}

.empty-placeholder p {
  font-size: 0.88rem;
}

.hidden {
  display: none !important;
}