/* ============================================
   eComStrategics — Global Styles
   ============================================ */

/* --- Custom Properties --- */
:root {
  --navy: #0f1729;
  --navy-light: #1a2744;
  --navy-mid: #243352;
  --teal: #00c2cb;
  --teal-dark: #00a3ab;
  --teal-glow: rgba(0, 194, 203, 0.15);
  --white: #ffffff;
  --gray-100: #f4f6f9;
  --gray-200: #e2e6ed;
  --gray-400: #9ba3b5;
  --gray-600: #6b7280;
  --gray-800: #374151;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1200px;
  --transition: 0.3s ease;
  --radius: 8px;
  --radius-lg: 16px;
}

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

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

body {
  font-family: var(--font);
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--teal-dark); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--teal); }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* --- Typography --- */
h1, h2, h3, h4 { font-weight: 700; line-height: 1.2; color: var(--navy); }
h1 { font-size: clamp(2.25rem, 5vw, 3.5rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); letter-spacing: -0.01em; }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h4 { font-size: 1.125rem; }

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--gray-600);
  max-width: 640px;
  margin: 0 auto;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--teal);
  color: var(--navy);
}
.btn-primary:hover {
  background: var(--teal-dark);
  color: var(--navy);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 194, 203, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255, 255, 255, 0.3);
}
.btn-outline:hover {
  border-color: var(--teal);
  color: var(--teal);
  transform: translateY(-2px);
}

.btn-dark {
  background: var(--navy);
  color: var(--white);
}
.btn-dark:hover {
  background: var(--navy-light);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(15, 23, 41, 0.3);
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 23, 41, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 2px solid rgba(255, 255, 255, 0.15);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-logo-icon {
  height: 28px;
  width: auto;
}
.nav-logo-text span { color: var(--teal); }
.nav-logo-text { display: inline; }

.footer-brand .nav-logo-icon {
  height: 36px;
}

.nav-links { display: flex; gap: 36px; list-style: none; }
.nav-links a {
  color: var(--gray-400);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--white); }

.nav-cta .btn { padding: 10px 24px; font-size: 0.85rem; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--navy);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(0, 194, 203, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(0, 194, 203, 0.05) 0%, transparent 50%);
}

.hero-grid, .grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero h1 {
  color: var(--white);
  margin-bottom: 24px;
}

.hero h1 em {
  font-style: normal;
  color: var(--teal);
}

.hero-sub {
  font-size: 1.2rem;
  color: var(--gray-400);
  line-height: 1.8;
  margin-bottom: 40px;
  max-width: 560px;
}

.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 72px;
  padding-top: 40px;
  border-top: 2px solid rgba(255, 255, 255, 0.15);
}

.hero-stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--teal);
  line-height: 1;
}

.hero-stat-label {
  font-size: 0.85rem;
  color: var(--gray-400);
  margin-top: 8px;
}

/* --- Sections --- */
.section {
  padding: 100px 0;
}
.section-dark {
  background: var(--navy);
  color: var(--white);
  position: relative;
  overflow: hidden;
}
.section-dark::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(0, 194, 203, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(0, 194, 203, 0.05) 0%, transparent 50%);
  pointer-events: none;
}
.section-dark > *:not(.grid-overlay) { position: relative; z-index: 1; }
.section-dark h2, .section-dark h3, .section-dark h4 { color: var(--white); }
.section-dark .section-subtitle { color: var(--gray-400); }

.section-light {
  background: var(--gray-100);
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

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

.service-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  border: 1px solid var(--gray-200);
  transition: all var(--transition);
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.08);
  border-color: var(--teal);
}

.service-icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: var(--teal-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  font-size: 1.5rem;
}

.service-card h3 { margin-bottom: 12px; }
.service-card p { color: var(--gray-600); font-size: 0.95rem; }

/* --- Metric Cards --- */
.metrics-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.metric-card {
  background: var(--navy-light);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.metric-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--teal);
  line-height: 1;
  margin-bottom: 8px;
}

.metric-label {
  font-size: 0.85rem;
  color: var(--gray-400);
}

/* --- Case Studies --- */
.case-studies-grid {
  display: grid;
  gap: 48px;
}

.case-study-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 56px;
  border: 1px solid var(--gray-200);
  transition: all var(--transition);
}
.case-study-card:hover {
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.06);
}

.case-study-tag {
  display: inline-block;
  padding: 6px 16px;
  background: var(--teal-glow);
  color: var(--teal-dark);
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.case-study-card h3 { margin-bottom: 16px; }
.case-study-card p { color: var(--gray-600); margin-bottom: 24px; }

.case-study-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.case-metric {
  padding: 24px;
  background: var(--gray-100);
  border-radius: var(--radius);
}

.case-metric-value {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--navy);
  line-height: 1;
}

.case-metric-label {
  font-size: 0.8rem;
  color: var(--gray-600);
  margin-top: 6px;
}

/* --- About --- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-content p {
  color: var(--gray-600);
  margin-bottom: 20px;
}

.values-list {
  list-style: none;
  margin-top: 32px;
}

.values-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
}

.values-list li::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--teal);
  border-radius: 50%;
  flex-shrink: 0;
}

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

.process-step {
  text-align: center;
  padding: 32px 24px;
}

.process-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--teal);
  color: var(--navy);
  font-weight: 800;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.process-step h4 { margin-bottom: 10px; }
.process-step p { font-size: 0.9rem; color: var(--gray-400); }

/* --- Contact Form --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact-info h2 { margin-bottom: 20px; }
.contact-info p { color: var(--gray-600); margin-bottom: 32px; }

.contact-detail {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--gray-200);
}

.contact-detail-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--teal-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-detail-text { font-size: 0.95rem; }
.contact-detail-label { font-size: 0.8rem; color: var(--gray-400); }

.contact-form {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 48px;
  border: 1px solid var(--gray-200);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.04);
}

.form-group { margin-bottom: 24px; }
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 0.95rem;
  color: var(--navy);
  background: var(--gray-100);
  transition: all var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--teal);
  background: var(--white);
  box-shadow: 0 0 0 3px var(--teal-glow);
}

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

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* --- Footer --- */
.footer {
  background: var(--navy);
  padding: 64px 0 32px;
  border-top: 2px solid rgba(255, 255, 255, 0.15);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: 48px;
}

.footer-brand p {
  color: var(--gray-400);
  font-size: 0.9rem;
  margin-top: 12px;
  max-width: 320px;
}

.footer-links h4 {
  color: var(--white);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: var(--gray-400); font-size: 0.9rem; }
.footer-links a:hover { color: var(--teal); }

.footer-bottom {
  padding-top: 32px;
  border-top: 2px solid rgba(255, 255, 255, 0.15);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-bottom p { color: var(--gray-400); font-size: 0.8rem; }

/* --- Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Page Hero (inner pages) --- */
.page-hero {
  padding: 160px 0 80px;
  background: var(--navy);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(0, 194, 203, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(0, 194, 203, 0.05) 0%, transparent 50%);
  pointer-events: none;
}
.page-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}
.page-hero > * { position: relative; z-index: 1; }
.page-hero h1 { color: var(--white); margin-bottom: 16px; }
.page-hero p { color: var(--gray-400); font-size: 1.125rem; max-width: 560px; margin: 0 auto; }

/* --- CTA Banner --- */
.cta-banner {
  text-align: center;
  padding: 80px 0;
  background: var(--navy);
}
.cta-banner h2 { color: var(--white); margin-bottom: 16px; }
.cta-banner p { color: var(--gray-400); margin-bottom: 32px; max-width: 480px; margin-left: auto; margin-right: auto; }

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .metrics-row { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .case-study-card { grid-template-columns: 1fr; gap: 32px; padding: 40px; }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--navy);
    padding: 24px;
    gap: 16px;
    border-bottom: 2px solid rgba(255, 255, 255, 0.15);
  }

  .hero { min-height: auto; padding: 140px 0 80px; }
  .hero-stats { flex-direction: column; gap: 24px; }
  .section { padding: 64px 0; }
  .services-grid { grid-template-columns: 1fr; }
  .metrics-row { grid-template-columns: 1fr 1fr; }
  .process-grid { grid-template-columns: 1fr 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .case-study-card { padding: 32px 24px; }
}

@media (max-width: 480px) {
  .metrics-row { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .case-study-metrics { grid-template-columns: 1fr; }
  .contact-form { padding: 32px 24px; }
}