/* ==========================================================================
   OptelAgent — Static Website Styles
   ========================================================================== */

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

:root {
  --color-bg: #0a1628;
  --color-bg-light: #0f1f3d;
  --color-bg-card: #132244;
  --color-primary: #3b82f6;
  --color-primary-dark: #2563eb;
  --color-accent: #06d6a0;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-text-heading: #ffffff;
  --color-border: rgba(255, 255, 255, 0.08);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --transition: 0.3s ease;
}

html {
  font-size: 16px;
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  overflow-x: hidden;
}

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

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

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

ul {
  list-style: none;
}

/* --- Container --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  text-align: center;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.9rem;
}

.btn-full {
  width: 100%;
}

.badge {
  display: inline-block;
  background: var(--color-accent);
  color: var(--color-bg);
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  vertical-align: middle;
  margin-left: 6px;
}

/* --- Navbar --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(10, 22, 40, 0.95);
  backdrop-filter: blur(12px);
  padding: 10px 0;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-heading);
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo:hover {
  color: var(--color-text-heading);
}

.logo-img {
  height: 32px;
  width: auto;
  border-radius: 4px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition);
}

.nav-links a:hover {
  color: var(--color-text-heading);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: all var(--transition);
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(59, 130, 246, 0.15) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 80% 20%, rgba(6, 214, 160, 0.08) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-text-heading);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 64px;
  flex-wrap: wrap;
}

.stat {
  text-align: center;
}

.stat-num {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Sections --- */
.section {
  padding: 100px 0;
}

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

.section-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-text-heading);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.section-header p {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* --- Features --- */
.features {
  background: var(--color-bg-light);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: all var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-text-heading);
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* --- How It Works --- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.step {
  text-align: center;
  padding: 0 20px;
}

.step-number {
  font-size: 4rem;
  font-weight: 800;
  color: rgba(59, 130, 246, 0.2);
  line-height: 1;
  margin-bottom: 16px;
}

.step h3 {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--color-text-heading);
  margin-bottom: 12px;
}

.step p {
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* --- Use Cases --- */
.use-cases {
  background: var(--color-bg-light);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.case-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px 32px;
  transition: all var(--transition);
}

.case-card:hover {
  transform: translateY(-4px);
  border-color: rgba(6, 214, 160, 0.3);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.case-card h3 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--color-text-heading);
  margin-bottom: 12px;
}

.case-card p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* --- Pricing --- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: start;
}

.price-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px 32px;
  text-align: center;
  transition: all var(--transition);
  position: relative;
}

.price-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.price-card.featured {
  border-color: var(--color-primary);
  box-shadow: 0 0 40px rgba(59, 130, 246, 0.15);
  transform: scale(1.04);
}

.price-card.featured:hover {
  transform: scale(1.04) translateY(-4px);
}

.price-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 20px;
  border-radius: 20px;
  white-space: nowrap;
}

.price-card h3 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--color-text-heading);
  margin-bottom: 16px;
}

.price {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-text-heading);
  margin-bottom: 28px;
}

.price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text-muted);
}

.price-card ul {
  text-align: left;
  margin-bottom: 32px;
}

.price-card li {
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.price-card li::before {
  content: "\2713 ";
  color: var(--color-accent);
  font-weight: 700;
  margin-right: 8px;
}

/* --- Contact --- */
.contact {
  background: var(--color-bg-light);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact-info h2 {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-text-heading);
  margin-bottom: 20px;
  line-height: 1.2;
}

.contact-info p {
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 32px;
}

.contact-details li {
  padding: 8px 0;
  color: var(--color-text-muted);
}

.contact-details strong {
  color: var(--color-text);
}

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

.form-group {
  margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 1rem;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

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

/* --- Footer --- */
.footer {
  padding: 64px 0 32px;
  border-top: 1px solid var(--color-border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand p {
  color: var(--color-text-muted);
  margin-top: 12px;
  font-size: 0.95rem;
}

.footer-links h4 {
  color: var(--color-text-heading);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--color-text);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
  text-align: center;
}

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

/* --- Responsive --- */
@media (max-width: 968px) {
  .features-grid,
  .pricing-grid,
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }

  .price-card.featured {
    transform: scale(1);
  }

  .price-card.featured:hover {
    transform: translateY(-4px);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 640px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10, 22, 40, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
  }

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

  .features-grid,
  .pricing-grid,
  .steps,
  .cases-grid {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero-stats {
    gap: 32px;
  }

  .section {
    padding: 64px 0;
  }

  .section-header h2 {
    font-size: 2rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .contact-form {
    padding: 24px;
  }
}

/* --- Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* --- Print --- */
@media print {
  .navbar, .hero-bg, .btn { display: none; }
  body { background: #fff; color: #000; }
  .section { padding: 24px 0; }
}