/* ============================================================
   ArcticIndus — Main Stylesheet
   Dark & Modern theme with blue/cyan accents
   ============================================================ */

/* ---------- CSS Variables ---------- */
:root {
  --bg-base:      #090d17;
  --bg-surface:   #0d1424;
  --bg-card:      #111827;
  --bg-card-hover:#131e2e;
  --border:       rgba(255,255,255,0.06);
  --border-glow:  rgba(0,200,220,0.3);

  --accent:       #00c8dc;
  --accent-2:     #5b9cf6;
  --accent-grad:  linear-gradient(135deg, #00c8dc 0%, #5b9cf6 100%);
  --accent-glow:  rgba(0,200,220,0.15);

  --text-primary:  #f0f4ff;
  --text-secondary:#8b98b8;
  --text-muted:    #4d5a72;

  --radius:    12px;
  --radius-lg: 20px;
  --shadow:    0 4px 24px rgba(0,0,0,0.4);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.5);

  --nav-h: 70px;
  --container: 1140px;
  --font: 'Inter', system-ui, sans-serif;
}

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

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

body {
  font-family: var(--font);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

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

.gradient-text {
  background: var(--accent-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid rgba(0,200,220,0.2);
  padding: 4px 14px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
}

.section-header h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
}

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

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-grad);
  color: #fff;
  box-shadow: 0 0 20px rgba(0,200,220,0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(0,200,220,0.4);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

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

.btn-sm { padding: 9px 20px; font-size: 0.85rem; }
.btn-full { width: 100%; justify-content: center; }

/* ---------- Navbar ---------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(9,13,23,0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s;
}

.navbar.scrolled {
  background: rgba(9,13,23,0.97);
}

.nav-inner {
  display: flex;
  align-items: center;
  height: var(--nav-h);
  gap: 32px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo-icon {
  font-size: 1.4rem;
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 4px;
  margin-left: auto;
}

.nav-links a {
  padding: 6px 14px;
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s, background 0.2s;
}

.nav-links a:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-h) + 48px) 0 80px;
  overflow: hidden;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,200,220,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,200,220,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 40%, black 20%, transparent 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: -10%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(ellipse, rgba(0,200,220,0.08) 0%, transparent 65%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  text-align: center;
  max-width: 780px;
  margin: 0 auto;
}

.badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid rgba(0,200,220,0.25);
  padding: 5px 16px;
  border-radius: 100px;
  margin-bottom: 24px;
}

.hero-content h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

.hero-cta .btn { padding: 14px 32px; font-size: 1rem; }

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-num {
  font-size: 2rem;
  font-weight: 800;
  background: var(--accent-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.scroll-arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: rotate(45deg);
  animation: bounce 1.8s ease infinite;
}

@keyframes bounce {
  0%, 100% { transform: rotate(45deg) translateY(0); }
  50%       { transform: rotate(45deg) translateY(6px); }
}

/* ---------- Services ---------- */
.services {
  padding: 100px 0;
  background: var(--bg-surface);
  position: relative;
}

.services::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

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

.service-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: 0 8px 32px rgba(0,200,220,0.1);
}

.service-card.featured {
  border-color: rgba(0,200,220,0.3);
  background: linear-gradient(145deg, #0f1d2e, #111827);
  box-shadow: 0 0 40px rgba(0,200,220,0.08);
}

.card-badge {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--bg-base);
  background: var(--accent-grad);
  padding: 3px 10px;
  border-radius: 100px;
}

.service-icon {
  width: 52px;
  height: 52px;
  color: var(--accent);
  margin-bottom: 24px;
  padding: 10px;
  background: var(--accent-glow);
  border: 1px solid rgba(0,200,220,0.15);
  border-radius: 12px;
}

.service-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-card > p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-bottom: 20px;
  line-height: 1.65;
}

.service-list {
  margin-bottom: 24px;
}

.service-list li {
  font-size: 0.875rem;
  color: var(--text-secondary);
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
}

.service-list li::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

.service-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  transition: gap 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.service-link:hover { gap: 8px; }

/* ---------- About ---------- */
.about {
  padding: 100px 0;
  background: var(--bg-base);
}

.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-visual {
  position: relative;
  height: 400px;
}

.about-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(0,200,220,0.1) 0%, transparent 70%);
  border-radius: 50%;
}

.about-card-stack {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 16px;
}

.acard {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  transition: transform 0.3s, border-color 0.3s;
}

.acard:hover {
  transform: translateX(8px);
  border-color: var(--border-glow);
}

.acard-1 { margin-right: 40px; }
.acard-2 { margin-left: 20px; margin-right: 20px; border-color: rgba(0,200,220,0.25); }
.acard-3 { margin-left: 40px; }

.acard-icon {
  font-size: 1.6rem;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-glow);
  border-radius: 10px;
  flex-shrink: 0;
}

.acard-title {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.acard-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.about-text h2 {
  font-size: clamp(1.75rem, 3vw, 2.4rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
}

.about-text p {
  color: var(--text-secondary);
  font-size: 0.97rem;
  line-height: 1.75;
  margin-bottom: 16px;
}

.about-pillars {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 28px 0 36px;
}

.pillar {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.pillar-icon {
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
}

/* ---------- Contact ---------- */
.contact {
  padding: 100px 0;
  background: var(--bg-surface);
  position: relative;
}

.contact::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-2), transparent);
}

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 60px;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding-top: 8px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-icon {
  width: 42px;
  height: 42px;
  background: var(--accent-glow);
  border: 1px solid rgba(0,200,220,0.15);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.contact-value {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: color 0.2s;
}

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

/* Form */
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.form-group label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.form-group input,
.form-group textarea {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 0.93rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,200,220,0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-note {
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 12px;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--bg-base);
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 60px;
  padding: 64px 0 48px;
  align-items: start;
}

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

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.88rem;
  max-width: 280px;
  line-height: 1.65;
}

.footer-links {
  display: flex;
  gap: 60px;
}

.footer-col h4 {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: color 0.2s;
}

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

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
}

.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ---------- Active nav link ---------- */
.nav-links a.active {
  color: var(--accent);
  background: var(--accent-glow);
}

/* ---------- Form validation ---------- */
.input-error {
  border-color: #f87171 !important;
  box-shadow: 0 0 0 3px rgba(248,113,113,0.15) !important;
}

.field-error {
  font-size: 0.78rem;
  color: #f87171;
  margin-top: 4px;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: 1fr; max-width: 560px; margin: 0 auto; }
  .about-inner { grid-template-columns: 1fr; gap: 48px; }
  .about-visual { height: 280px; }
  .contact-inner { grid-template-columns: 1fr; gap: 40px; }
  .footer-inner { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  .nav-links, .navbar .btn { display: none; }
  .hamburger { display: flex; }
  .nav-inner { justify-content: space-between; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(9,13,23,0.98);
    backdrop-filter: blur(16px);
    padding: 24px;
    gap: 8px;
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open a {
    padding: 12px 16px;
    font-size: 1rem;
  }

  .form-row { grid-template-columns: 1fr; }
  .about-pillars { grid-template-columns: 1fr; }
  .footer-links { gap: 40px; }
  .hero-stats { gap: 24px; }
  .stat-divider { display: none; }
  .contact-form { padding: 28px 20px; }
  .footer-bottom .container { flex-direction: column; gap: 8px; text-align: center; }
}

@media (max-width: 480px) {
  .section-header { margin-bottom: 48px; }
  .services, .about, .contact { padding: 72px 0; }
  .hero-cta { flex-direction: column; align-items: center; }
}