@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap");

:root {
  --bg: #0a0a0f;
  --bg-gradient: linear-gradient(135deg, #0a0a0f 0%, #0d1117 50%, #0a0a0f 100%);
  --panel: rgba(17, 24, 39, 0.6);
  --panel-solid: #111827;
  --panel-alt: #0f172a;
  --border: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(14, 165, 233, 0.3);
  --text: #f1f5f9;
  --muted: #94a3b8;
  --accent: #0ea5e9;
  --accent-light: #38bdf8;
  --accent-glow: rgba(14, 165, 233, 0.4);
  --purple: #8b5cf6;
  --pink: #ec4899;
  --gradient-accent: linear-gradient(135deg, var(--accent) 0%, var(--purple) 100%);
  --gradient-hero: linear-gradient(135deg, rgba(14, 165, 233, 0.15) 0%, rgba(139, 92, 246, 0.1) 50%, rgba(236, 72, 153, 0.05) 100%);
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Animated background */
.bg-glow {
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 50% 50%, rgba(14, 165, 233, 0.08) 0%, transparent 50%),
              radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.06) 0%, transparent 40%),
              radial-gradient(circle at 20% 80%, rgba(236, 72, 153, 0.04) 0%, transparent 40%);
  animation: bgPulse 15s ease-in-out infinite;
  pointer-events: none;
  z-index: -1;
}

@keyframes bgPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.8; transform: scale(1.1); }
}

/* Layout */
.container {
  width: min(1140px, 90vw);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 120px 0;
  position: relative;
}

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

h1, h2, h3, h4 {
  margin: 0 0 16px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

h2 {
  font-size: clamp(32px, 5vw, 44px);
  margin-bottom: 16px;
  text-align: center;
  background: linear-gradient(135deg, var(--text) 0%, var(--muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  text-align: center;
  color: var(--muted);
  font-size: 18px;
  max-width: 600px;
  margin: 0 auto 64px;
}

p {
  color: var(--muted);
  line-height: 1.7;
  margin: 0;
}

a {
  transition: all 0.3s ease;
}

/* Navbar */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}

.brand {
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.02em;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav__links a {
  padding: 8px 16px;
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 14px;
  border-radius: 8px;
  transition: all 0.3s ease;
}

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

/* Hero */
.hero {
  padding: 180px 0 140px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 150%;
  height: 100%;
  background: var(--gradient-hero);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  opacity: 0.3;
  filter: blur(80px);
  pointer-events: none;
  animation: heroGlow 8s ease-in-out infinite;
}

@keyframes heroGlow {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.3; }
  50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.5; }
}

.hero__inner {
  max-width: 800px;
  position: relative;
  z-index: 1;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 1.5px;
  color: var(--accent);
  font-weight: 600;
  padding: 8px 16px;
  background: rgba(14, 165, 233, 0.1);
  border: 1px solid rgba(14, 165, 233, 0.2);
  border-radius: 100px;
  margin-bottom: 24px;
}

.eyebrow::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero h1 {
  font-size: clamp(40px, 7vw, 64px);
  margin-top: 0;
  margin-bottom: 24px;
  background: linear-gradient(135deg, var(--text) 0%, var(--muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 20px;
  margin: 0 0 40px;
  max-width: 580px;
  line-height: 1.7;
}

/* Buttons */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 52px;
  padding: 0 28px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.button.primary {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow), 0 0 0 1px rgba(14, 165, 233, 0.2);
}

.button.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow), 0 0 0 1px rgba(14, 165, 233, 0.3);
}

.button.primary:active {
  transform: translateY(0);
}

.button.ghost {
  border-color: var(--border);
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
}

.button.ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}

.button.full {
  width: 100%;
}

.button.pricing {
  opacity: 1;
}
.button.pricing.disabled {
  pointer-events: none;
  cursor: not-allowed;
  opacity: 0.5;
  filter: saturate(0.5);
  box-shadow: none;
  transform: none;
}

.button.pricing.disabled:hover,
.button.pricing.disabled:active {
  transform: none;
  box-shadow: none;
}

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

/* Features */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.card {
  background: var(--panel);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 32px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-glow), transparent);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 60px var(--accent-glow);
}

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

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: rgba(14, 165, 233, 0.1);
  border: 1px solid rgba(14, 165, 233, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--accent);
}

.card-icon svg {
  width: 28px;
  height: 28px;
}

.card h3 {
  font-size: 20px;
  margin-bottom: 12px;
  color: var(--text);
}

.card p {
  font-size: 15px;
  line-height: 1.7;
}

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
}

.plan {
  background: var(--panel);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 36px;
  display: flex;
  flex-direction: column;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.plan:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.plan.popular {
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.08) 0%, rgba(139, 92, 246, 0.05) 100%);
  box-shadow: 0 0 40px var(--accent-glow);
}

.plan.popular:hover {
  box-shadow: 0 0 60px var(--accent-glow), 0 20px 40px rgba(0, 0, 0, 0.3);
}

.badge {
  align-self: flex-start;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: var(--gradient-accent);
  color: #fff;
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.plan h3 {
  font-size: 22px;
  margin-bottom: 8px;
}

.price {
  font-size: 48px;
  font-weight: 800;
  margin: 0;
  color: var(--text);
  letter-spacing: -0.02em;
}

.price span {
  font-size: 16px;
  font-weight: 500;
  color: var(--muted);
  margin-left: 4px;
}

.plan ul {
  list-style: none;
  padding: 0;
  margin: 24px 0;
  flex: 1;
}

.plan li {
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--muted);
  font-size: 15px;
}

.plan li::before {
  content: '';
  width: 20px;
  height: 20px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%230ea5e9' stroke-width='2'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M5 13l4 4L19 7'/%3E%3C/svg%3E") center/contain no-repeat;
  flex-shrink: 0;
}

/* Steps */
.steps {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.step {
  display: flex;
  gap: 24px;
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
  position: relative;
  transition: all 0.3s ease;
}

.step:last-child {
  border-bottom: none;
}

.step:hover {
  padding-left: 12px;
}

.step-num {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--gradient-accent);
  color: #fff;
  font-weight: 700;
  font-size: 18px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.step h4 {
  font-size: 20px;
  margin-bottom: 8px;
  color: var(--text);
}

.step p {
  font-size: 15px;
  margin: 0;
}

/* FAQ */
.faq {
  max-width: 700px;
  margin: 0 auto;
}

.faq details {
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 17px;
  color: var(--text);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: color 0.3s ease;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: '+';
  font-size: 24px;
  font-weight: 400;
  color: var(--muted);
  transition: transform 0.3s ease;
}

.faq details[open] summary::after {
  transform: rotate(45deg);
}

.faq summary:hover {
  color: var(--accent);
}

.faq p {
  margin-top: 16px;
  padding-right: 40px;
  font-size: 15px;
  line-height: 1.8;
}

/* Footer */
.footer {
  padding: 40px 0;
  text-align: center;
  color: var(--muted);
  border-top: 1px solid var(--border);
  font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
  .nav__links {
    display: none;
  }

  .hero {
    padding: 140px 0 100px;
  }

  .hero h1 {
    font-size: clamp(32px, 8vw, 48px);
  }

  .hero p {
    font-size: 17px;
  }

  .hero__cta {
    flex-direction: column;
  }

  .hero__cta .button {
    width: 100%;
  }

  .section {
    padding: 80px 0;
  }

  .feature-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .step {
    gap: 16px;
  }

  .step-num {
    width: 40px;
    height: 40px;
    font-size: 16px;
  }
}

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

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

/* Smooth scroll offset for fixed header */
html {
  scroll-padding-top: 80px;
}

/* 404 page */
.not-found-main {
  min-height: calc(100vh - 180px);
  display: grid;
  align-items: center;
}

.hero--404 {
  padding: 140px 0 80px;
}

.hero--404 .hero__inner {
  margin: 0 auto;
  text-align: center;
}

.hero--404 p {
  margin-left: auto;
  margin-right: auto;
}

.not-found-cta {
  justify-content: center;
}

@media (max-width: 768px) {
  .not-found-main {
    min-height: auto;
  }

  .hero--404 {
    padding: 130px 0 72px;
  }
}