/* ============================================================
   Cloud Inspire — Main Website Styles
   CLO-213: Static website for cloud-inspire.io
   ============================================================ */

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

:root {
  --ci-blue: #1ABDF8;
  --ci-blue-dark: #0E9DD6;
  --ci-navy: #1A1A2E;
  --ci-navy-light: #2D2D44;
  --ci-surface: #F8F7FA;
  --ci-white: #FFFFFF;
  --ci-gray-100: #F5F5F5;
  --ci-gray-200: #E8E8E8;
  --ci-gray-400: #A0A0A0;
  --ci-gray-600: #666666;
  --ci-gray-800: #333333;
  --ci-success: #28C76F;
  --ci-warning: #FF9F43;

  --font-heading: 'Inter', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;

  --container-max: 1200px;
  --section-padding: 5rem 0;
  --transition: 0.3s ease;
}

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

body {
  font-family: var(--font-body);
  color: var(--ci-gray-800);
  background: var(--ci-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--ci-blue);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--ci-blue-dark);
}

img {
  max-width: 100%;
  height: auto;
}

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

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

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.125rem, 2vw, 1.5rem); }

p {
  margin-bottom: 1rem;
  line-height: 1.7;
}

.text-gradient {
  background: linear-gradient(135deg, var(--ci-blue), #6C63FF);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--ci-gray-200);
  transition: background var(--transition);
}

.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1.5rem;
  max-width: var(--container-max);
  margin: 0 auto;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--ci-navy);
}

.nav-logo svg {
  height: 2rem;
  width: auto;
}

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

.nav-links a {
  color: var(--ci-gray-600);
  font-weight: 500;
  font-size: 0.875rem;
  padding: 0.5rem 0;
  position: relative;
}

.nav-links a:hover {
  color: var(--ci-navy);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--ci-blue);
  transition: width var(--transition);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  background: var(--ci-blue);
  color: var(--ci-white) !important;
  padding: 0.625rem 1.25rem !important;
  border-radius: 0.5rem;
  font-weight: 600 !important;
  transition: background var(--transition), transform var(--transition) !important;
}

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

.nav-cta::after {
  display: none !important;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ci-navy);
  margin: 5px 0;
  transition: all var(--transition);
}

/* Hero Section */
.hero {
  padding: 8rem 0 5rem;
  background: linear-gradient(135deg, var(--ci-surface) 0%, var(--ci-white) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(circle, rgba(26, 189, 248, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(26, 189, 248, 0.1);
  color: var(--ci-blue-dark);
  padding: 0.375rem 1rem;
  border-radius: 2rem;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(26, 189, 248, 0.2);
}

.hero-badge::before {
  content: '✦';
  font-size: 0.75rem;
}

.hero h1 {
  margin-bottom: 1.5rem;
  max-width: 700px;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--ci-gray-600);
  max-width: 600px;
  margin-bottom: 2rem;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  border-radius: 0.5rem;
  font-weight: 600;
  font-size: 0.9375rem;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--ci-blue);
  color: var(--ci-white);
  box-shadow: 0 4px 14px rgba(26, 189, 248, 0.3);
}

.btn-primary:hover {
  background: var(--ci-blue-dark);
  color: var(--ci-white);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(26, 189, 248, 0.4);
}

.btn-secondary {
  background: var(--ci-white);
  color: var(--ci-navy);
  border: 1.5px solid var(--ci-gray-200);
}

.btn-secondary:hover {
  border-color: var(--ci-blue);
  color: var(--ci-blue);
  transform: translateY(-2px);
}

/* Stats */
.hero-stats {
  display: flex;
  gap: 3rem;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--ci-gray-200);
}

.stat {
  text-align: left;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--ci-navy);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.stat-number span {
  color: var(--ci-blue);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--ci-gray-600);
}

/* Sections */
.section {
  padding: var(--section-padding);
}

.section-alt {
  background: var(--ci-surface);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3rem;
}

.section-header h2 {
  margin-bottom: 1rem;
}

.section-header p {
  color: var(--ci-gray-600);
  font-size: 1.0625rem;
}

.section-label {
  display: inline-block;
  color: var(--ci-blue);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}

/* Sectors / Industries Grid */
.sectors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.sector-card {
  background: var(--ci-white);
  border-radius: 1rem;
  padding: 2rem;
  border: 1px solid var(--ci-gray-200);
  transition: all var(--transition);
}

.sector-card:hover {
  border-color: var(--ci-blue);
  box-shadow: 0 8px 30px rgba(26, 189, 248, 0.1);
  transform: translateY(-2px);
}

.sector-icon {
  width: 3rem;
  height: 3rem;
  background: rgba(26, 189, 248, 0.1);
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

.sector-card h3 {
  margin-bottom: 0.5rem;
  font-size: 1.125rem;
}

.sector-card p {
  color: var(--ci-gray-600);
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* Services / Pillars */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.pillar-card {
  position: relative;
  background: var(--ci-white);
  border-radius: 1rem;
  padding: 2.5rem 2rem;
  border: 1px solid var(--ci-gray-200);
  overflow: hidden;
  transition: all var(--transition);
}

.pillar-card:hover {
  border-color: var(--ci-blue);
  box-shadow: 0 12px 40px rgba(26, 189, 248, 0.12);
}

.pillar-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--ci-blue), #6C63FF);
  opacity: 0;
  transition: opacity var(--transition);
}

.pillar-card:hover::before {
  opacity: 1;
}

.pillar-tag {
  display: inline-block;
  background: rgba(26, 189, 248, 0.1);
  color: var(--ci-blue-dark);
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.pillar-card h3 {
  margin-bottom: 0.75rem;
}

.pillar-card p {
  color: var(--ci-gray-600);
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* Differentiators */
.diff-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.diff-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1.5rem;
  border-radius: 0.75rem;
  background: var(--ci-white);
  border: 1px solid var(--ci-gray-200);
}

.diff-icon {
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  background: rgba(26, 189, 248, 0.1);
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.diff-item h4 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.diff-item p {
  color: var(--ci-gray-600);
  font-size: 0.875rem;
  margin-bottom: 0;
}

/* CTA Section */
.cta-section {
  background: linear-gradient(135deg, var(--ci-navy) 0%, var(--ci-navy-light) 100%);
  color: var(--ci-white);
  padding: 5rem 0;
  text-align: center;
}

.cta-section h2 {
  color: var(--ci-white);
  margin-bottom: 1rem;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto 2rem;
}

.cta-section .btn-primary {
  background: var(--ci-blue);
  box-shadow: 0 4px 14px rgba(26, 189, 248, 0.4);
}

/* Footer */
.footer {
  background: var(--ci-navy);
  color: rgba(255, 255, 255, 0.6);
  padding: 3rem 0 1.5rem;
}

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

.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.6;
  margin-top: 0.75rem;
}

.footer h4 {
  color: var(--ci-white);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer ul {
  list-style: none;
}

.footer ul li {
  margin-bottom: 0.5rem;
}

.footer ul a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.875rem;
  transition: color var(--transition);
}

.footer ul a:hover {
  color: var(--ci-blue);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
}

.footer-social {
  display: flex;
  gap: 1rem;
}

.footer-social a {
  color: rgba(255, 255, 255, 0.4);
  font-size: 1.25rem;
  transition: color var(--transition);
}

.footer-social a:hover {
  color: var(--ci-blue);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--ci-white);
    flex-direction: column;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--ci-gray-200);
    gap: 0;
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--ci-gray-100);
  }

  .mobile-toggle {
    display: block;
  }

  .hero {
    padding: 6rem 0 3rem;
  }

  .hero-stats {
    gap: 1.5rem;
    flex-wrap: wrap;
  }

  .stat-number {
    font-size: 2rem;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

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

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  animation: fadeInUp 0.6s ease forwards;
  opacity: 0;
}

.animate-in:nth-child(2) { animation-delay: 0.1s; }
.animate-in:nth-child(3) { animation-delay: 0.2s; }
.animate-in:nth-child(4) { animation-delay: 0.3s; }

/* Accessibility */
:focus-visible {
  outline: 2px solid var(--ci-blue);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* Skip to content link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--ci-blue);
  color: var(--ci-white);
  padding: 0.5rem 1rem;
  z-index: 1001;
  font-weight: 600;
}

.skip-link:focus {
  top: 0;
}