/* ============================================
   LR Data Science — Static Site CSS
   "The AI Layer for Retail & Consumer Goods"
   ============================================ */

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

:root {
  --color-primary: #1a2332;
  --color-accent: #d8613c;
  --color-accent-hover: #c4522f;
  --color-sage: #b1c5a4;
  --color-taupe: #c2a990;
  --color-light: #f7f8fa;
  --color-white: #ffffff;
  --color-text: #2d3748;
  --color-text-light: #636363;
  --color-border: #e2e8f0;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1200px;
  --section-padding: 5rem 1.5rem;
}

html { scroll-behavior: smooth; font-size: 16px; }

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

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--color-accent-hover); }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-primary);
}

h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); margin-bottom: 1rem; }
h3 { font-size: 1.25rem; margin-bottom: 0.5rem; }

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-light);
  max-width: 640px;
  margin: 0 auto 3rem;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 0.85rem 2rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  color: var(--color-white);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(216, 97, 60, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border: 2px solid var(--color-white);
}
.btn-outline:hover {
  background: var(--color-white);
  color: var(--color-primary);
}

.btn-outline-dark {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}
.btn-outline-dark:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

/* --- Header / Nav --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(26, 35, 50, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-white);
  font-weight: 700;
  font-size: 1.1rem;
}

.nav-logo img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
}

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

.nav-links a {
  color: rgba(255,255,255,0.85);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--color-white); }
.nav-links .btn { font-size: 0.9rem; padding: 0.6rem 1.4rem; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-white);
  font-size: 1.5rem;
  cursor: pointer;
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, #0f1923 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: url('../img/hero-bg.jpg') center/cover no-repeat;
  opacity: 0.08;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 8rem 1.5rem 5rem;
}

.hero-badge {
  display: inline-block;
  background: rgba(216, 97, 60, 0.15);
  color: var(--color-accent);
  padding: 0.4rem 1rem;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(216, 97, 60, 0.3);
}

.hero h1 {
  color: var(--color-white);
  margin-bottom: 1.5rem;
  max-width: 700px;
}

.hero h1 span { color: var(--color-accent); }

.hero-text {
  color: rgba(255,255,255,0.75);
  font-size: 1.2rem;
  max-width: 560px;
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.hero-buttons { display: flex; gap: 1rem; flex-wrap: wrap; }

.hero-stats {
  display: flex;
  gap: 3rem;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.hero-stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-white);
}

.hero-stat-label {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
  margin-top: 0.25rem;
}

/* --- Sections --- */
.section { padding: var(--section-padding); }
.section-alt { background: var(--color-light); }
.section-dark { background: var(--color-primary); color: var(--color-white); }
.section-dark h2 { color: var(--color-white); }
.section-dark .section-subtitle { color: rgba(255,255,255,0.65); }
.text-center { text-align: center; }

/* --- Service Cards --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.service-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 2rem;
  transition: transform 0.2s, box-shadow 0.2s;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.08);
}

.service-card-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}

.icon-enterprise { background: rgba(216, 97, 60, 0.1); color: var(--color-accent); }
.icon-sme { background: rgba(177, 197, 164, 0.2); color: #5a7a4a; }

.service-card h3 { font-size: 1.2rem; }

.service-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
}

.service-card .tier-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
  margin-bottom: 1rem;
}

.tier-enterprise { background: rgba(216, 97, 60, 0.1); color: var(--color-accent); }
.tier-sme { background: rgba(177, 197, 164, 0.2); color: #5a7a4a; }

.service-card .price {
  font-weight: 700;
  color: var(--color-primary);
  font-size: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

/* --- Stats Row --- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}

.stat-item h3 {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.stat-item p {
  color: rgba(255,255,255,0.65);
  font-size: 0.95rem;
}

/* --- Clients / Logos --- */
.clients-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.client-item {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text-light);
  opacity: 0.7;
  transition: opacity 0.2s;
}
.client-item:hover { opacity: 1; }

/* --- Portfolio --- */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.portfolio-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}

.portfolio-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.08);
}

.portfolio-card-body { padding: 1.5rem; }
.portfolio-card h3 { margin-bottom: 0.5rem; }

.portfolio-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.portfolio-tag {
  display: inline-block;
  background: var(--color-light);
  color: var(--color-text-light);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  margin-right: 0.5rem;
}

/* --- About / Team --- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-text p {
  margin-bottom: 1rem;
  color: var(--color-text-light);
}

.about-text p:first-of-type {
  font-size: 1.15rem;
  color: var(--color-text);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.team-card {
  text-align: center;
  padding: 2rem;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 12px;
}

.team-card-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--color-light);
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--color-accent);
  font-weight: 700;
}

.team-card h3 { margin-bottom: 0.25rem; }
.team-card .role { color: var(--color-text-light); font-size: 0.9rem; }

/* --- Moat / Differentiators --- */
.moat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.moat-item {
  padding: 1.5rem;
  border-left: 3px solid var(--color-accent);
}

.moat-item h3 {
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.moat-item p {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

/* --- Contact --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.contact-info-item {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.contact-info-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(216, 97, 60, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-info-item h3 { font-size: 1rem; margin-bottom: 0.2rem; }
.contact-info-item p { color: var(--color-text-light); font-size: 0.95rem; }

/* --- CTA Banner --- */
.cta-banner {
  text-align: center;
  padding: 5rem 1.5rem;
  background: linear-gradient(135deg, var(--color-accent) 0%, #c4522f 100%);
  color: var(--color-white);
}

.cta-banner h2 { color: var(--color-white); margin-bottom: 1rem; }
.cta-banner p { color: rgba(255,255,255,0.85); margin-bottom: 2rem; font-size: 1.1rem; }

.cta-banner .btn-outline {
  border-color: var(--color-white);
  color: var(--color-white);
}
.cta-banner .btn-outline:hover {
  background: var(--color-white);
  color: var(--color-accent);
}

/* --- Footer --- */
.site-footer {
  background: var(--color-primary);
  color: rgba(255,255,255,0.6);
  padding: 3rem 1.5rem 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-brand p { margin-top: 0.75rem; font-size: 0.9rem; line-height: 1.6; }

.footer-col h4 {
  color: var(--color-white);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 0.5rem; }
.footer-col a { color: rgba(255,255,255,0.6); font-size: 0.9rem; }
.footer-col a:hover { color: var(--color-white); }

.footer-bottom {
  max-width: var(--max-width);
  margin: 2rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-primary);
    padding: 1rem 1.5rem 1.5rem;
    gap: 1rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
  }
  .nav-toggle { display: block; }

  .hero-content { padding: 7rem 1.5rem 3rem; }
  .hero-stats { gap: 1.5rem; flex-wrap: wrap; }
  .hero-stat-number { font-size: 1.5rem; }

  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 2rem; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; gap: 0.5rem; }
  .portfolio-grid { grid-template-columns: 1fr; }
}

/* --- Page Header (for inner pages) --- */
.page-header {
  background: var(--color-primary);
  padding: 8rem 1.5rem 3rem;
  text-align: center;
}

.page-header h1 { color: var(--color-white); margin-bottom: 0.75rem; }
.page-header p { color: rgba(255,255,255,0.65); font-size: 1.1rem; }

/* --- Pricing Table --- */
.pricing-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1.5rem;
}

.pricing-table th {
  text-align: left;
  padding: 0.75rem 1rem;
  background: var(--color-light);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-light);
  border-bottom: 2px solid var(--color-border);
}

.pricing-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.95rem;
}

/* --- Timeline --- */
.timeline {
  position: relative;
  padding-left: 2rem;
  margin-top: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  margin-bottom: 2rem;
  padding-left: 1.5rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2.35rem;
  top: 0.4rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid var(--color-white);
}

.timeline-year {
  font-weight: 700;
  color: var(--color-accent);
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
}

.timeline-item p { color: var(--color-text-light); font-size: 0.95rem; }

/* --- Locations --- */
.locations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.location-card {
  padding: 1.5rem;
  background: var(--color-light);
  border-radius: 12px;
}

.location-card h3 { margin-bottom: 0.5rem; }
.location-card p { color: var(--color-text-light); font-size: 0.95rem; line-height: 1.6; }