/* ============================================
   ColocationSite — Main Stylesheet
   Professional colocation/hosting aesthetic
   ============================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: #1a2236;
  --bg-card-hover: #1f2a42;
  --text-primary: #e8edf5;
  --text-secondary: #8b9bb4;
  --text-muted: #5a6a82;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-light: #60a5fa;
  --accent-glow: rgba(59, 130, 246, 0.25);
  --success: #22c55e;
  --error: #ef4444;
  --border: #1e2d45;
  --border-light: #263550;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --radius: 8px;
  --radius-lg: 12px;
  --transition: 0.2s ease;
  --max-width: 1200px;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-light); text-decoration: none; transition: color var(--transition); }
a:hover { color: #fff; }

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

ul { list-style: none; }

/* ---------- Skip Link ---------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--accent);
  color: #fff;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  z-index: 9999;
  border-radius: 0 0 var(--radius) 0;
  transition: top 0.2s;
}
.skip-link:focus { top: 0; color: #fff; }

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

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-top: 0.5rem;
  margin-bottom: 3rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition);
  text-decoration: none;
  white-space: nowrap;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #fff;
  box-shadow: 0 0 20px var(--accent-glow);
}

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

.btn-outline-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.5);
}
.btn-outline-light:hover {
  background: rgba(255,255,255,0.1);
  border-color: #fff;
  color: #fff;
}

.btn-block { width: 100%; }

/* ---------- Header ---------- */
#header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 23, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

#header nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  padding-bottom: 1rem;
}

#header .logo {
  font-size: 1.3rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a:not(.btn) {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
}
.nav-links a:not(.btn):hover { color: #fff; }

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

/* ---------- Hero ---------- */
#hero {
  padding: 8rem 0 6rem;
  text-align: center;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(59, 130, 246, 0.12) 0%, transparent 70%);
}

#hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
  color: #fff;
}

#hero p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2.5rem;
}

.hero-cta { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ---------- Sections (general) ---------- */
section { padding: 5rem 0; }
section h2 {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 0.5rem;
  color: #fff;
  letter-spacing: -0.02em;
}

/* ---------- Services ---------- */
#services { background: var(--bg-secondary); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

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

.service-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3), 0 0 0 1px var(--accent-glow);
}

.service-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: #fff;
}

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

.service-icon {
  color: var(--accent-light);
  margin-bottom: 1rem;
}

.service-card ul { display: flex; flex-direction: column; gap: 0.5rem; }

.service-card li {
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding-left: 1.2rem;
  position: relative;
}

.service-card li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent-light);
  font-weight: 700;
}

/* ---------- Pricing ---------- */
#pricing { background: var(--bg-primary); }

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  align-items: start;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: relative;
  transition: transform var(--transition), border-color var(--transition);
}

.pricing-card:hover { border-color: var(--border-light); transform: translateY(-2px); }

.pricing-card.featured {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), var(--shadow);
}

.badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 1rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pricing-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.75rem; color: #fff; }

.pricing-card .price {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent-light);
  margin-bottom: 1.5rem;
  letter-spacing: -0.03em;
}

.pricing-card .price span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.pricing-card ul { display: flex; flex-direction: column; gap: 0.6rem; margin-bottom: 1.5rem; }

.pricing-card li {
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding-left: 1.4rem;
  position: relative;
}

.pricing-card li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent-light);
  font-size: 1.1rem;
  font-weight: 700;
}

/* ---------- Testimonials ---------- */
#testimonials { background: var(--bg-secondary); }

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.testimonial-card p {
  color: var(--text-primary);
  font-style: italic;
  font-size: 1rem;
  margin-bottom: 1.25rem;
  line-height: 1.7;
}

.testimonial-card cite {
  color: var(--accent-light);
  font-style: normal;
  font-weight: 600;
  font-size: 0.9rem;
}

/* ---------- Contact ---------- */
#contact { background: var(--bg-primary); }

.contact-wrapper {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 4rem;
  margin-top: 3rem;
  align-items: start;
}

/* ---------- Form ---------- */
.form-group { margin-bottom: 1.25rem; }

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  -webkit-appearance: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

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

.form-group select { cursor: pointer; }

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

.field-error {
  display: block;
  color: var(--error);
  font-size: 0.82rem;
  margin-top: 0.3rem;
  min-height: 1.2em;
}

.form-status {
  text-align: center;
  font-size: 0.95rem;
  margin-top: 0.75rem;
}
.form-status.success { color: var(--success); }
.form-status.error { color: var(--error); }

/* ---------- Contact Info ---------- */
.contact-info {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.contact-info h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 1.25rem; color: #fff; }

.contact-info address { font-style: normal; margin-bottom: 1.25rem; }
.contact-info address p { color: var(--text-secondary); margin-bottom: 0.4rem; }

.contact-info p { color: var(--text-secondary); font-size: 0.95rem; margin-bottom: 0.6rem; }
.contact-info strong { color: var(--text-primary); }
.contact-info a { color: var(--accent-light); }
.contact-info .btn { margin-top: 1.5rem; width: 100%; }

/* ---------- Scroll Reveal Animation ---------- */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }
  .reveal.revealed {
    opacity: 1;
    transform: translateY(0);
  }
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- Footer ---------- */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 3rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 2rem;
}

footer .logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  display: block;
  margin-bottom: 0.75rem;
}

footer > .container > p:last-of-type { color: var(--text-muted); font-size: 0.85rem; }

.footer-grid h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.footer-grid ul { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-grid li a { color: var(--text-secondary); font-size: 0.9rem; }
.footer-grid li a:hover { color: var(--accent-light); }

.copyright { color: var(--text-muted); font-size: 0.85rem; }

/* ---------- Form validation ---------- */
.form-group.has-error input,
.form-group.has-error select,
.form-group.has-error textarea { border-color: var(--error); }

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .nav-toggle { display: block; }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    gap: 0;
    padding: 1rem 0;
  }

  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a:not(.btn) { display: block; padding: 0.75rem 1.5rem; }
  .nav-links .btn { display: block; margin: 0.5rem 1.5rem; text-align: center; }

  #hero { padding: 5rem 0 4rem; }
  #hero h1 { font-size: 2rem; }

  .contact-wrapper { grid-template-columns: 1fr; gap: 2rem; }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .footer-grid > div:first-child { grid-column: 1 / -1; }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
}