:root {
  --primary: #0284c7;
  --primary-hover: #0369a1;
  --primary-light: #f0f9ff;
  --accent: #f97316;
  --accent-hover: #ea580c;
  --success: #10b981;
  --navy: #0f172a;
  --navy-surface: #1e293b;
  --slate-800: #1e293b;
  --slate-700: #334155;
  --slate-600: #475569;
  --slate-500: #64748b;
  --slate-400: #94a3b8;
  --slate-200: #e2e8f0;
  --slate-100: #f1f5f9;
  --slate-50: #f8fafc;
  --white: #ffffff;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--slate-50);
  color: var(--slate-700);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Layout */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header & Nav */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--slate-200);
}

.top-bar {
  background: var(--navy);
  color: var(--slate-400);
  font-size: 0.8rem;
  padding: 6px 0;
  border-bottom: 1px solid var(--slate-800);
}

.top-bar-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--navy);
  letter-spacing: -0.01em;
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary), #0284c7);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--slate-600);
  transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--white);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
}

.btn-accent {
  background-color: var(--accent);
  color: var(--white);
}

.btn-accent:hover {
  background-color: var(--accent-hover);
}

.btn-outline {
  background-color: transparent;
  color: var(--slate-700);
  border-color: var(--slate-200);
}

.btn-outline:hover {
  background-color: var(--slate-100);
  border-color: var(--slate-400);
}

.btn-white {
  background-color: var(--white);
  color: var(--navy);
}

.btn-white:hover {
  background-color: var(--slate-100);
}

.btn-sm {
  padding: 7px 16px;
  font-size: 0.85rem;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--navy);
  cursor: pointer;
  padding: 8px;
}

/* Hero Section */
.hero {
  padding: 70px 0 60px;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.97), rgba(30, 41, 59, 0.98)),
              radial-gradient(circle at top right, rgba(2, 132, 199, 0.2), transparent 50%);
  color: white;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 14px;
  background-color: rgba(2, 132, 199, 0.18);
  border: 1px solid rgba(2, 132, 199, 0.4);
  color: #38bdf8;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}

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

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero h1 {
  font-size: 3.1rem;
  line-height: 1.15;
  font-weight: 800;
  color: white;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero h1 span {
  color: #38bdf8;
}

.hero p {
  font-size: 1.15rem;
  color: var(--slate-300);
  margin-bottom: 32px;
  max-width: 560px;
}

/* Tracking Card */
.tracking-card {
  background-color: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: 32px;
  color: var(--slate-800);
}

.tracking-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--slate-200);
}

.tracking-header h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--navy);
  display: flex;
  align-items: center;
  gap: 8px;
}

.tracking-input-group {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.tracking-input {
  flex: 1;
  padding: 12px 16px;
  border: 2px solid var(--slate-200);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  font-weight: 600;
  text-transform: uppercase;
}

.tracking-input:focus {
  outline: none;
  border-color: var(--primary);
}

.tracking-hint {
  font-size: 0.8rem;
  color: var(--slate-500);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Tracking Result Modal / Box */
.tracking-result-box {
  margin-top: 18px;
  padding: 18px;
  background: var(--slate-50);
  border-radius: var(--radius-md);
  border: 1px solid var(--slate-200);
  display: none;
}

.tracking-result-box.active {
  display: block;
}

.timeline {
  list-style: none;
  position: relative;
  padding-left: 24px;
  margin-top: 14px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: var(--slate-200);
}

.timeline-item {
  position: relative;
  margin-bottom: 16px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -24px;
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid white;
}

.timeline-item.done::before {
  background: var(--success);
}

.timeline-item.pending::before {
  background: var(--slate-300);
}

.timeline-title {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--navy);
}

.timeline-time {
  font-size: 0.78rem;
  color: var(--slate-500);
}

/* Sections */
.section {
  padding: 80px 0;
}

.section-alt {
  background-color: var(--white);
}

.section-dark {
  background-color: var(--navy);
  color: var(--slate-200);
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary);
  margin-bottom: 10px;
}

.section-header h2 {
  font-size: 2.3rem;
  font-weight: 800;
  color: var(--navy);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-dark .section-header h2 {
  color: var(--white);
}

.section-header p {
  font-size: 1.05rem;
  color: var(--slate-500);
}

/* Grids */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 36px;
}

/* Cards */
.card {
  background-color: var(--white);
  padding: 32px;
  border-radius: var(--radius-md);
  border: 1px solid var(--slate-200);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(2, 132, 199, 0.3);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background-color: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}

.card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 12px;
}

.card p {
  color: var(--slate-600);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Ports & Hubs */
.hub-item {
  background: var(--navy-surface);
  border: 1px solid var(--slate-700);
  padding: 20px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 14px;
}

.hub-flag {
  font-size: 1.6rem;
}

.hub-name {
  font-weight: 700;
  color: var(--white);
  font-size: 0.95rem;
}

.hub-meta {
  font-size: 0.8rem;
  color: #38bdf8;
}

/* Stats */
.stats-banner {
  background: linear-gradient(135deg, var(--navy), #1e293b);
  border-radius: var(--radius-lg);
  padding: 48px;
  color: white;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-box h3 {
  font-size: 2.4rem;
  font-weight: 800;
  color: #38bdf8;
  margin-bottom: 6px;
}

.stat-box p {
  font-size: 0.9rem;
  color: var(--slate-300);
}

/* Forms */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.95rem;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-sm);
  background-color: var(--white);
  font-family: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

/* Footer */
footer {
  background-color: var(--navy);
  color: var(--slate-400);
  padding: 70px 0 30px;
  border-top: 1px solid var(--slate-800);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 50px;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.6;
  margin-top: 16px;
  max-width: 320px;
}

.footer-col h5 {
  color: var(--white);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 12px;
}

.footer-col a {
  font-size: 0.9rem;
  color: var(--slate-400);
  transition: color 0.2s ease;
}

.footer-col a:hover {
  color: var(--white);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--slate-800);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .grid-3, .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-banner {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .top-bar {
    display: none;
  }
  .nav-links, .nav-actions {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 74px;
    left: 0;
    width: 100%;
    background: var(--white);
    padding: 24px;
    box-shadow: var(--shadow-lg);
    border-bottom: 1px solid var(--slate-200);
  }
  .hero h1 {
    font-size: 2.3rem;
  }
  .grid-3, .grid-4, .grid-2, .stats-banner {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}