/* ============================================
   RSN Enterprise — Global Import & Export
   ============================================ */

:root {
  --color-primary: #0c4a6e;
  --color-primary-dark: #082f49;
  --color-primary-light: #0369a1;
  --color-accent: #d97706;
  --color-accent-light: #f59e0b;
  --color-bg: #f8fafc;
  --color-bg-alt: #f1f5f9;
  --color-surface: #ffffff;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --font-body: 'DM Sans', system-ui, sans-serif;
  --font-display: 'Playfair Display', Georgia, serif;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  --radius: 12px;
  --radius-lg: 20px;
  --header-height: 72px;
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-accent);
}

ul {
  list-style: none;
}

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

/* ---- Header ---- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.site-header.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: var(--color-text);
}

.logo:hover {
  color: var(--color-text);
}

.logo-mark {
  background: var(--color-primary);
  color: #fff;
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--color-primary-dark);
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-nav a {
  display: block;
  padding: 8px 16px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: 8px;
  transition: background var(--transition), color var(--transition);
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-primary);
  background: var(--color-bg-alt);
}

.site-nav .nav-cta {
  background: var(--color-primary);
  color: #fff;
  margin-left: 8px;
}

.site-nav .nav-cta:hover {
  background: var(--color-primary-dark);
  color: #fff;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 10px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-light);
  border-color: var(--color-accent-light);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.6);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: #fff;
  color: #fff;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1rem;
}

.btn-full {
  width: 100%;
}

/* ---- Hero ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: url('../images/hero-bg.jpg') center / cover no-repeat;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(8, 47, 73, 0.88) 0%,
    rgba(12, 74, 110, 0.75) 50%,
    rgba(3, 105, 161, 0.65) 100%
  );
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 80px 24px 100px;
  color: #fff;
  max-width: 1200px;
  margin: 0 auto;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent-light);
  margin-bottom: 16px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 24px;
}

.hero-desc {
  font-size: 1.15rem;
  max-width: 560px;
  opacity: 0.92;
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 60px;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.stat-value {
  display: block;
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-accent-light);
}

.stat-label {
  font-size: 0.85rem;
  opacity: 0.8;
}

/* ---- Page Hero (Products) ---- */
.page-hero {
  position: relative;
  padding: calc(var(--header-height) + 80px) 0 80px;
  text-align: center;
  color: #fff;
}

.page-hero-bg {
  position: absolute;
  inset: 0;
  background: url('../images/hero-bg.jpg') center / cover no-repeat;
  z-index: 0;
}

.page-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8, 47, 73, 0.9) 0%, rgba(12, 74, 110, 0.85) 100%);
  z-index: 1;
}

.page-hero-content {
  position: relative;
  z-index: 2;
}

.page-hero-content .section-tag {
  color: var(--color-accent-light);
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 16px;
}

.page-hero p {
  font-size: 1.1rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

/* ---- Sections ---- */
.section {
  padding: 100px 0;
}

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

.section-header {
  margin-bottom: 56px;
}

.section-header.centered {
  text-align: center;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  color: var(--color-primary-dark);
  margin-bottom: 16px;
}

.section-lead {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 640px;
  line-height: 1.7;
}

.section-header.centered .section-lead {
  margin: 0 auto;
}

/* ---- Introduction ---- */
.intro-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.intro-card {
  background: var(--color-surface);
  padding: 36px 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: box-shadow var(--transition), transform var(--transition);
}

.intro-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.intro-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: #fff;
}

.intro-icon svg {
  width: 26px;
  height: 26px;
}

.intro-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
  color: var(--color-primary-dark);
}

.intro-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ---- About ---- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.about-image img {
  width: 100%;
  height: 480px;
  object-fit: cover;
}

.about-badge {
  position: absolute;
  bottom: 24px;
  left: 24px;
  background: var(--color-accent);
  color: #fff;
  padding: 12px 24px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.95rem;
}

.about-content h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  color: var(--color-primary-dark);
  margin-bottom: 20px;
}

.about-content p {
  color: var(--color-text-muted);
  margin-bottom: 16px;
  line-height: 1.7;
}

.about-list {
  margin: 24px 0 32px;
}

.about-list li {
  padding: 10px 0;
  padding-left: 28px;
  position: relative;
  color: var(--color-text);
  font-weight: 500;
}

.about-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 50%;
}

/* ---- Features ---- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.feature-item {
  padding: 28px;
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.feature-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent);
  opacity: 0.6;
  margin-bottom: 12px;
}

.feature-item h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
  color: var(--color-primary-dark);
}

.feature-item p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ---- Contact ---- */
.contact-info-grid {
  max-width: 900px;
  margin: 0 auto;
}

.contact-info {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.contact-card {
  display: flex;
  gap: 16px;
  padding: 20px;
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.contact-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: var(--color-bg-alt);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.contact-icon svg {
  width: 22px;
  height: 22px;
}

.contact-card h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: 4px;
}

.contact-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.contact-form {
  background: var(--color-surface);
  padding: 36px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

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

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(3, 105, 161, 0.15);
}

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

.form-note {
  margin-top: 12px;
  font-size: 0.9rem;
  text-align: center;
}

.form-note.success {
  color: #059669;
}

.form-note.error {
  color: #dc2626;
}

/* ---- Services ---- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  background: var(--color-surface);
  padding: 32px 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: box-shadow var(--transition), transform var(--transition);
}

.service-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.service-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  margin-bottom: 20px;
}

.service-icon svg {
  width: 24px;
  height: 24px;
}

.service-card h3 {
  font-size: 1.15rem;
  color: var(--color-primary-dark);
  margin-bottom: 12px;
}

.service-card p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 16px;
}

.service-list li {
  font-size: 0.88rem;
  color: var(--color-text);
  padding: 6px 0;
  padding-left: 20px;
  position: relative;
}

.service-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 600;
}

.services-grid--three {
  grid-template-columns: repeat(3, 1fr);
}

.categories-grid--two {
  grid-template-columns: repeat(2, 1fr);
}

.category-card--wide {
  text-align: left;
  padding: 36px 32px;
}

.category-list {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px 16px;
}

.category-list li {
  font-size: 0.9rem;
  color: var(--color-text);
  padding-left: 18px;
  position: relative;
}

.category-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

/* ---- Categories ---- */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.category-card {
  background: var(--color-surface);
  padding: 32px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  text-align: center;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.category-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-sm);
}

.category-icon {
  font-size: 2.5rem;
  display: block;
  margin-bottom: 16px;
}

.category-card h3 {
  font-size: 1.05rem;
  color: var(--color-primary-dark);
  margin-bottom: 8px;
}

.category-card p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ---- Products ---- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.product-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}

.product-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.product-image {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.product-card:hover .product-image img {
  transform: scale(1.05);
}

.product-placeholder {
  background: linear-gradient(135deg, var(--color-bg-alt), var(--color-border));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}

.product-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.product-body {
  padding: 24px;
}

.product-body h3 {
  font-size: 1.1rem;
  color: var(--color-primary-dark);
  margin-bottom: 10px;
}

.product-body p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.product-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.product-meta span {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-primary);
  background: var(--color-bg-alt);
  padding: 4px 12px;
  border-radius: 6px;
}

/* ---- Process ---- */
.process-steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
}

.process-step {
  flex: 1;
  min-width: 180px;
  max-width: 240px;
  text-align: center;
  padding: 24px 16px;
}

.step-num {
  width: 56px;
  height: 56px;
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.process-step h3 {
  font-size: 1.05rem;
  color: var(--color-primary-dark);
  margin-bottom: 8px;
}

.process-step p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.process-connector {
  width: 60px;
  height: 2px;
  background: var(--color-border);
  margin-top: 52px;
  flex-shrink: 0;
}

/* ---- CTA ---- */
.cta-section {
  padding: 60px 0 100px;
}

.cta-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  padding: 48px 56px;
  border-radius: var(--radius-lg);
  color: #fff;
}

.cta-content h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  margin-bottom: 12px;
}

.cta-content p {
  opacity: 0.9;
  max-width: 500px;
  line-height: 1.6;
}

/* ---- Footer ---- */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.8);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}

.footer-brand .logo {
  margin-bottom: 16px;
}

.footer-brand .logo-mark {
  background: rgba(255, 255, 255, 0.15);
}

.footer-brand .logo-text {
  color: #fff;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  opacity: 0.75;
}

.footer-links h4,
.footer-contact h4 {
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-links ul li {
  margin-bottom: 10px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--color-accent-light);
}

.footer-contact p {
  font-size: 0.9rem;
  margin-bottom: 8px;
  opacity: 0.75;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 24px 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.85rem;
  opacity: 0.6;
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .intro-grid,
  .services-grid,
  .services-grid--three,
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .categories-grid--two {
    grid-template-columns: 1fr;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 16px;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
    box-shadow: var(--shadow-md);
  }

  .site-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .site-nav ul {
    flex-direction: column;
    gap: 4px;
  }

  .site-nav a {
    padding: 12px 16px;
  }

  .site-nav .nav-cta {
    margin-left: 0;
    margin-top: 8px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .contact-info {
    grid-template-columns: 1fr;
  }

  .about-image img {
    height: 320px;
  }

  .intro-grid,
  .categories-grid,
  .categories-grid--two,
  .services-grid,
  .services-grid--three,
  .products-grid,
  .features-grid {
    grid-template-columns: 1fr;
  }

  .category-list {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .cta-box {
    flex-direction: column;
    text-align: center;
    padding: 36px 28px;
  }

  .cta-content p {
    max-width: none;
  }

  .process-connector {
    display: none;
  }

  .process-steps {
    flex-direction: column;
    align-items: center;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-stats {
    gap: 24px;
  }
}

@media (max-width: 480px) {
  .section {
    padding: 72px 0;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }
}