/* DHL Package Tracker - Design System */

:root {
    --dhl-red: #D40511;
    --dhl-red-dark: #B00410;
    --dhl-yellow: #FFCC00;
    --bg-primary: #0a0a0b;
    --bg-secondary: #111113;
    --bg-card: #18181b;
    --bg-card-hover: #1f1f23;
    --bg-elevated: #27272a;
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --status-pending: #f59e0b;
    --status-transit: #3b82f6;
    --status-delivered: #10b981;
    --status-exception: #ef4444;
    --glass-bg: rgba(24, 24, 27, 0.8);
    --glass-border: rgba(255, 255, 255, 0.1);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}
body::before {
    content: '';
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 600px;
    background: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(212, 5, 17, 0.15), transparent);
    pointer-events: none;
    z-index: -1;
}

.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
}
.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-md) var(--space-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-xl);
}
.logo { display: flex; align-items: center; gap: var(--space-md); }
.logo-icon {
    background: linear-gradient(135deg, var(--dhl-red), var(--dhl-red-dark));
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    box-shadow: 0 0 40px rgba(212, 5, 17, 0.15);
}
.logo-text { font-size: 1.5rem; font-weight: 800; color: var(--dhl-yellow); letter-spacing: 2px; }
.logo-subtitle { font-size: 0.875rem; color: var(--text-secondary); font-weight: 500; }
.nav { display: flex; gap: var(--space-sm); }
.nav-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}
.nav-btn:hover { background: var(--bg-elevated); color: var(--text-primary); }
.nav-btn.active { background: var(--bg-elevated); border-color: var(--glass-border); color: var(--text-primary); }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}
.btn-primary {
    background: linear-gradient(135deg, var(--dhl-red), var(--dhl-red-dark));
    color: white;
    box-shadow: 0 4px 12px rgba(212, 5, 17, 0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(212, 5, 17, 0.4); }
.btn-secondary { background: var(--bg-elevated); color: var(--text-primary); border: 1px solid var(--glass-border); }
.btn-secondary:hover { background: var(--bg-card-hover); border-color: var(--text-muted); }
.btn-danger { background: rgba(239, 68, 68, 0.1); color: var(--status-exception); border: 1px solid rgba(239, 68, 68, 0.3); }
.btn-danger:hover { background: rgba(239, 68, 68, 0.2); }

.main { max-width: 1400px; margin: 0 auto; padding: var(--space-xl); }
.view { display: none; animation: fadeIn 0.3s ease; }
.view.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: var(--space-lg); margin-bottom: var(--space-2xl); }
.stat-card {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}
.stat-card:hover { background: var(--bg-card-hover); border-color: var(--text-muted); transform: translateY(-2px); }
.stat-icon { width: 56px; height: 56px; display: flex; align-items: center; justify-content: center; border-radius: var(--radius-md); }
.stat-icon.pending { background: rgba(245, 158, 11, 0.1); color: var(--status-pending); }
.stat-icon.transit { background: rgba(59, 130, 246, 0.1); color: var(--status-transit); }
.stat-icon.delivered { background: rgba(16, 185, 129, 0.1); color: var(--status-delivered); }
.stat-icon.exception { background: rgba(239, 68, 68, 0.1); color: var(--status-exception); }
.stat-info { display: flex; flex-direction: column; }
.stat-value { font-size: 2rem; font-weight: 700; line-height: 1; }
.stat-label { color: var(--text-secondary); font-size: 0.875rem; margin-top: var(--space-xs); }

.section { margin-bottom: var(--space-2xl); }
.section-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--space-lg); flex-wrap: wrap; gap: var(--space-md); }
.section-title { font-size: 1.25rem; font-weight: 600; }
.search-box { display: flex; align-items: center; gap: var(--space-sm); padding: var(--space-sm) var(--space-md); background: var(--bg-card); border: 1px solid var(--glass-border); border-radius: var(--radius-md); }
.search-box:focus-within { border-color: var(--dhl-red); box-shadow: 0 0 0 3px rgba(212, 5, 17, 0.1); }
.search-box svg { color: var(--text-muted); }
.search-box input { background: transparent; border: none; outline: none; color: var(--text-primary); font-size: 0.875rem; width: 200px; }
.search-box input::placeholder { color: var(--text-muted); }

.shipments-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: var(--space-lg); }
.shipment-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    animation: slideUp 0.4s ease backwards;
}
.shipment-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--dhl-red), var(--dhl-yellow));
    opacity: 0;
    transition: opacity var(--transition-fast);
}
.shipment-card:hover { background: var(--bg-card-hover); border-color: var(--text-muted); transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.shipment-card:hover::before { opacity: 1; }
.shipment-header { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: var(--space-md); }
.shipment-tracking { font-family: 'Consolas', monospace; font-size: 0.875rem; font-weight: 600; color: var(--dhl-yellow); }
.shipment-badge { padding: var(--space-xs) var(--space-sm); border-radius: var(--radius-full); font-size: 0.75rem; font-weight: 600; text-transform: uppercase; }
.shipment-badge.pending { background: rgba(245, 158, 11, 0.1); color: var(--status-pending); }
.shipment-badge.in_transit { background: rgba(59, 130, 246, 0.1); color: var(--status-transit); }
.shipment-badge.delivered { background: rgba(16, 185, 129, 0.1); color: var(--status-delivered); }
.shipment-badge.exception { background: rgba(239, 68, 68, 0.1); color: var(--status-exception); }
.shipment-route { display: flex; align-items: center; gap: var(--space-md); margin-bottom: var(--space-md); }
.shipment-location { flex: 1; }
.shipment-location-label { display: block; font-size: 0.75rem; color: var(--text-muted); margin-bottom: var(--space-xs); }
.shipment-location-name { font-size: 0.9rem; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.shipment-arrow { color: var(--text-muted); flex-shrink: 0; }
.shipment-progress { height: 4px; background: var(--bg-elevated); border-radius: var(--radius-full); overflow: hidden; margin-bottom: var(--space-md); }
.shipment-progress-bar { height: 100%; background: linear-gradient(90deg, var(--dhl-red), var(--dhl-yellow)); border-radius: var(--radius-full); }
.shipment-footer { display: flex; align-items: center; justify-content: space-between; font-size: 0.8rem; color: var(--text-muted); }
.shipment-current { display: flex; align-items: center; gap: var(--space-xs); }
.shipment-current svg { width: 14px; height: 14px; }

.empty-state { grid-column: 1 / -1; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: var(--space-2xl); text-align: center; }
.empty-icon { color: var(--text-muted); margin-bottom: var(--space-lg); opacity: 0.5; }
.empty-state h3 { font-size: 1.25rem; margin-bottom: var(--space-sm); }
.empty-state p { color: var(--text-secondary); }

.back-btn { display: inline-flex; align-items: center; gap: var(--space-sm); padding: var(--space-sm) var(--space-md); background: transparent; border: 1px solid var(--glass-border); border-radius: var(--radius-md); color: var(--text-secondary); font-size: 0.875rem; cursor: pointer; margin-bottom: var(--space-xl); }
.back-btn:hover { background: var(--bg-card); color: var(--text-primary); }
.tracking-container { max-width: 900px; margin: 0 auto; }
.tracking-header { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-lg); margin-bottom: var(--space-xl); flex-wrap: wrap; }
.tracking-label { display: block; font-size: 0.875rem; color: var(--text-muted); margin-bottom: var(--space-xs); }
.tracking-number { font-family: 'Consolas', monospace; font-size: 1.75rem; font-weight: 700; color: var(--dhl-yellow); margin-bottom: var(--space-sm); }
.tracking-status { display: inline-block; padding: var(--space-xs) var(--space-md); border-radius: var(--radius-full); font-size: 0.875rem; font-weight: 600; }
.tracking-status.pending { background: rgba(245, 158, 11, 0.1); color: var(--status-pending); }
.tracking-status.in_transit { background: rgba(59, 130, 246, 0.1); color: var(--status-transit); }
.tracking-status.delivered { background: rgba(16, 185, 129, 0.1); color: var(--status-delivered); }
.tracking-status.exception { background: rgba(239, 68, 68, 0.1); color: var(--status-exception); }
.tracking-actions { display: flex; gap: var(--space-sm); }

.route-card { display: flex; align-items: center; gap: var(--space-lg); padding: var(--space-xl); background: var(--bg-card); border: 1px solid var(--glass-border); border-radius: var(--radius-lg); margin-bottom: var(--space-xl); }
.route-point { display: flex; align-items: center; gap: var(--space-md); flex: 1; }
.route-point.destination { justify-content: flex-end; text-align: right; }
.route-marker { width: 16px; height: 16px; border-radius: 50%; border: 3px solid var(--dhl-red); background: var(--bg-primary); }
.route-point.destination .route-marker { border-color: var(--status-delivered); }
.route-label { display: block; font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; margin-bottom: var(--space-xs); }
.route-location { display: block; font-size: 1rem; font-weight: 600; margin-bottom: var(--space-xs); }
.route-time { font-size: 0.8rem; color: var(--text-secondary); }
.route-progress { flex: 2; position: relative; display: flex; align-items: center; justify-content: center; }
.progress-line { position: absolute; top: 50%; left: 0; right: 0; height: 4px; background: var(--bg-elevated); border-radius: var(--radius-full); transform: translateY(-50%); }
.progress-fill { height: 100%; background: linear-gradient(90deg, var(--dhl-red), var(--dhl-yellow)); border-radius: var(--radius-full); }
.progress-icon { position: relative; z-index: 1; width: 48px; height: 48px; display: flex; align-items: center; justify-content: center; background: var(--bg-card); border: 2px solid var(--dhl-yellow); border-radius: 50%; color: var(--dhl-yellow); }

.timeline-section { margin-top: var(--space-xl); }
.timeline { margin-top: var(--space-lg); }
.timeline-item { display: flex; gap: var(--space-lg); padding-bottom: var(--space-lg); position: relative; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before { content: ''; position: absolute; left: 11px; top: 28px; bottom: 0; width: 2px; background: var(--bg-elevated); }
.timeline-item:last-child::before { display: none; }
.timeline-marker { width: 24px; height: 24px; border-radius: 50%; background: var(--bg-elevated); border: 2px solid var(--text-muted); flex-shrink: 0; display: flex; align-items: center; justify-content: center; }
.timeline-item.active .timeline-marker { background: var(--dhl-red); border-color: var(--dhl-red); }
.timeline-item.completed .timeline-marker { background: var(--status-delivered); border-color: var(--status-delivered); }
.timeline-marker svg { width: 12px; height: 12px; color: white; }
.timeline-content { flex: 1; padding-top: 2px; }
.timeline-location { font-weight: 600; margin-bottom: var(--space-xs); }
.timeline-status { font-size: 0.875rem; color: var(--text-secondary); margin-bottom: var(--space-xs); }
.timeline-time { font-size: 0.8rem; color: var(--text-muted); }
.timeline-notes { margin-top: var(--space-sm); padding: var(--space-sm) var(--space-md); background: var(--bg-elevated); border-radius: var(--radius-sm); font-size: 0.8rem; color: var(--text-secondary); }

.modal-overlay { position: fixed; inset: 0; background: rgba(0, 0, 0, 0.7); backdrop-filter: blur(4px); display: flex; align-items: center; justify-content: center; z-index: 1000; opacity: 0; visibility: hidden; transition: all var(--transition-base); }
.modal-overlay.active { opacity: 1; visibility: visible; }
.modal { background: var(--bg-card); border: 1px solid var(--glass-border); border-radius: var(--radius-xl); width: 100%; max-width: 480px; margin: var(--space-lg); transform: scale(0.9) translateY(20px); transition: transform var(--transition-base); }
.modal-overlay.active .modal { transform: scale(1) translateY(0); }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: var(--space-lg); border-bottom: 1px solid var(--glass-border); }
.modal-header h2 { font-size: 1.25rem; }
.modal-close { width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; background: transparent; border: none; border-radius: var(--radius-md); color: var(--text-secondary); cursor: pointer; }
.modal-close:hover { background: var(--bg-elevated); color: var(--text-primary); }
.modal-form { padding: var(--space-lg); }
.form-group { margin-bottom: var(--space-lg); }
.form-group label { display: block; font-size: 0.875rem; font-weight: 500; color: var(--text-secondary); margin-bottom: var(--space-sm); }
.form-group input, .form-group select { width: 100%; padding: var(--space-md); background: var(--bg-secondary); border: 1px solid var(--glass-border); border-radius: var(--radius-md); color: var(--text-primary); font-size: 0.9rem; }
.form-group input:focus, .form-group select:focus { outline: none; border-color: var(--dhl-red); box-shadow: 0 0 0 3px rgba(212, 5, 17, 0.1); }
.form-group input::placeholder { color: var(--text-muted); }
.form-group select { cursor: pointer; }
.form-group select option { background: var(--bg-card); }
.form-actions { display: flex; gap: var(--space-md); justify-content: flex-end; margin-top: var(--space-xl); }

@keyframes slideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.shipment-card:nth-child(1) { animation-delay: 0.05s; }
.shipment-card:nth-child(2) { animation-delay: 0.1s; }
.shipment-card:nth-child(3) { animation-delay: 0.15s; }

@media (max-width: 768px) {
    .header-container { flex-wrap: wrap; gap: var(--space-md); }
    .nav { order: 3; width: 100%; justify-content: center; }
    .main { padding: var(--space-md); }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .shipments-grid { grid-template-columns: 1fr; }
    .route-card { flex-direction: column; text-align: center; }
    .route-point, .route-point.destination { justify-content: center; text-align: center; }
    .tracking-header { flex-direction: column; }
    .tracking-actions { width: 100%; }
    .tracking-actions .btn { flex: 1; }
}
@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
    .btn { padding: var(--space-sm) var(--space-md); font-size: 0.8rem; }
}