/* ===== CSS Variables ===== */
:root {
  --primary: #0f4c81;
  --primary-dark: #0a3660;
  --primary-light: #e8f0f9;
  --accent: #2d8cff;
  --bg: #f8f9fa;
  --white: #ffffff;
  --text: #1a1a1a;
  --text-muted: #666666;
  --border: #e0e0e0;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
  --radius: 8px;
  --radius-lg: 12px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
}

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

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

/* ===== Navigation ===== */
nav {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  display: flex;
  align-items: center;
}

.nav-logo img {
  height: 40px;
  width: auto;
}

.nav-links {
  display: none;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
}

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

.nav-cta {
  background: var(--primary) !important;
  color: var(--white) !important;
  padding: 0.5rem 1.25rem !important;
  border-radius: var(--radius) !important;
  border-bottom: none !important;
  transition: background 0.2s, transform 0.2s !important;
}

.nav-cta:hover {
  background: var(--primary-dark) !important;
  transform: translateY(-1px);
}

.hamburger {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 5px;
  border-radius: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s;
}

/* Mobile Nav Drawer */
.mobile-nav {
  display: none;
  background: var(--white);
  border-top: 1px solid var(--border);
  padding: 0.5rem 0;
  list-style: none;
}

.mobile-nav.open {
  display: block;
}

.mobile-nav li a {
  display: block;
  padding: 0.875rem 1.5rem;
  color: var(--text);
  font-weight: 500;
  font-size: 1rem;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s;
}

.mobile-nav li:last-child a {
  border-bottom: none;
  color: var(--primary);
  font-weight: 700;
}

.mobile-nav li a:hover {
  background: var(--primary-light);
}

/* Desktop nav */
@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
  .hamburger {
    display: none;
  }
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 0.75rem 2rem;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 1rem;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
  cursor: pointer;
  border: none;
  text-align: center;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

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

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255, 255, 255, 0.7);
}

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

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

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

.btn-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* ===== Hero (Landing) ===== */
.hero {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  color: var(--white);
  padding: 3rem 1.25rem;
  overflow: hidden;
}

.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  text-align: center;
}

.hero-content {
  max-width: 560px;
}

.hero-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 0.35rem 0.875rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1rem;
  letter-spacing: -0.5px;
}

.hero p {
  font-size: 1.1rem;
  opacity: 0.9;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-image {
  width: 100%;
  max-width: 520px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

@media (min-width: 900px) {
  .hero {
    padding: 5rem 1.25rem;
  }

  .hero-inner {
    flex-direction: row;
    text-align: left;
    gap: 4rem;
  }

  .hero-content {
    flex: 1;
  }

  .hero h1 {
    font-size: 3rem;
  }

  .btn-group {
    justify-content: flex-start;
  }

  .hero-image {
    flex: 1;
    max-width: 500px;
  }
}

/* ===== Page Hero (Inner pages) ===== */
.page-hero {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  color: var(--white);
  padding: 3.5rem 1.25rem;
  text-align: center;
}

.page-hero h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.page-hero p {
  opacity: 0.9;
  max-width: 560px;
  margin: 0 auto;
  font-size: 1.05rem;
  line-height: 1.7;
}

@media (min-width: 768px) {
  .page-hero h1 {
    font-size: 2.75rem;
  }
}

/* ===== Sections ===== */
.section {
  padding: 4rem 1.25rem;
}

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-header {
  margin-bottom: 2.5rem;
  text-align: center;
}

.section-header h2 {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.section-header p {
  color: var(--text-muted);
  max-width: 540px;
  margin: 0 auto;
}

.section-accent {
  color: var(--primary);
}

/* ===== Features Grid ===== */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 600px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}

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

.feature-icon {
  font-size: 2.25rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.65;
}

/* ===== Products Grid ===== */
.products-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 600px) {
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .products-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.product-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
}

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

.product-swatch {
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding: 1rem;
}

.swatch {
  width: 48px;
  height: 48px;
  border-radius: 999px;
  border: 3px solid rgba(255,255,255,0.4);
  box-shadow: 0 2px 6px rgba(0,0,0,0.25);
}

.product-info {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  margin-bottom: 0.75rem;
}

.product-info h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.product-info p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  flex: 1;
  margin-bottom: 1rem;
}

.product-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
}

.product-price {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--primary);
}

.product-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
}

.product-link:hover {
  text-decoration: underline;
}

.product-card--oos {
  opacity: 0.65;
}

.product-card--oos .product-swatch {
  filter: grayscale(60%);
}

.oos-badge {
  display: inline-block;
  background: #e0e0e0;
  color: #666;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  margin-bottom: 0.75rem;
}

.oos-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: italic;
}

/* ===== Color Key Table ===== */
.color-key {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  margin-top: 1.5rem;
}

.color-key table {
  width: 100%;
  border-collapse: collapse;
}

.color-key th {
  background: var(--primary);
  color: var(--white);
  padding: 0.875rem 1.25rem;
  text-align: left;
  font-size: 0.85rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.color-key td {
  padding: 0.875rem 1.25rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

.color-key tr:last-child td {
  border-bottom: none;
}

.color-key tr:hover td {
  background: var(--bg);
}

.dot {
  display: inline-block;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  vertical-align: middle;
  margin-right: 0.5rem;
  border: 2px solid rgba(0,0,0,0.1);
}

/* ===== About Page ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr 1fr;
  }

  .section-header {
    text-align: left;
  }

  .about-grid .section-header {
    text-align: left;
  }
}

.about-image {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  width: 100%;
  object-fit: cover;
}

.about-text h2 {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 1rem;
}

.about-text p {
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.values-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 600px) {
  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.value-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--primary);
  transition: transform 0.2s;
}

.value-card:hover {
  transform: translateY(-2px);
}

.value-icon {
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
}

.value-card h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.4rem;
}

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

/* ===== CTA Section ===== */
.cta-section {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  color: var(--white);
  text-align: center;
  padding: 4rem 1.25rem;
}

.cta-section h2 {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.cta-section p {
  opacity: 0.9;
  max-width: 480px;
  margin: 0 auto 2rem;
  line-height: 1.7;
}

@media (min-width: 768px) {
  .cta-section h2 {
    font-size: 2.25rem;
  }
}

/* ===== Footer ===== */
footer {
  background: #111;
  color: #aaa;
  padding: 2.5rem 1.25rem;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  text-align: center;
}

.footer-logo {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--white);
}

.footer-logo span {
  color: var(--accent);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
  list-style: none;
}

.footer-links a {
  color: #aaa;
  font-size: 0.9rem;
  transition: color 0.2s;
}

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

.footer-copy {
  font-size: 0.85rem;
  color: #555;
}

/* ===== Divider ===== */
.section-divider {
  background: var(--bg);
}

/* ===== Alt background ===== */
.bg-white {
  background: var(--white);
}

/* ===== Utilities ===== */
.text-center {
  text-align: center;
}

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }