/* ============================================
   DARK LLC — Dark Glassmorphism Landing Page
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
  /* Color system */
  --bg-base: #050816;
  --bg-deep: #03050f;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-hover: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(59, 130, 246, 0.35);

  --blue-50: #eff6ff;
  --blue-300: #93c5fd;
  --blue-400: #60a5fa;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;

  --text-primary: #f0f4ff;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent: #38bdf8;
  --accent-glow: rgba(56, 189, 248, 0.15);

  /* Spacing */
  --space: 8px;

  /* Radius */
  --radius-sm: 8px;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  /* Transitions */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.5;
  overflow-x: hidden;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

/* ============================================
   Animated Background
   ============================================ */
.bg-canvas {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background: var(--bg-base);
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  will-change: transform;
}

.orb--1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #1d4ed8, transparent 70%);
  top: -100px;
  left: -100px;
  animation: float1 18s ease-in-out infinite;
}

.orb--2 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, #0ea5e9, transparent 70%);
  bottom: -150px;
  right: -100px;
  animation: float2 22s ease-in-out infinite;
}

.orb--3 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, #2563eb, transparent 70%);
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: float3 26s ease-in-out infinite;
}

@keyframes float1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(100px, 80px) scale(1.15); }
  66% { transform: translate(-50px, 120px) scale(0.9); }
}

@keyframes float2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-120px, -80px) scale(1.2); }
}

@keyframes float3 {
  0%, 100% { transform: translate(-50%, -50%) scale(1); }
  50% { transform: translate(-40%, -60%) scale(1.3); }
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59, 130, 246, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}

/* ============================================
   Glass utility
   ============================================ */
.glass {
  background: var(--surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space);
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.3s var(--ease);
  white-space: nowrap;
}

.btn--primary {
  background: linear-gradient(135deg, var(--blue-600), var(--blue-500));
  color: #fff;
  box-shadow: 0 4px 24px rgba(37, 99, 235, 0.3);
}
.btn--primary:hover {
  background: linear-gradient(135deg, var(--blue-500), var(--accent));
  box-shadow: 0 6px 32px rgba(37, 99, 235, 0.5);
  transform: translateY(-2px);
}

.btn--glass {
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  color: var(--text-primary);
}
.btn--glass:hover {
  background: var(--surface-hover);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-primary);
}
.btn--ghost:hover {
  border-color: var(--blue-400);
  background: var(--surface);
}

.btn--lg {
  padding: 14px 28px;
  font-size: 0.95rem;
}

.btn--block {
  width: 100%;
}

/* ============================================
   Navigation
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: all 0.4s var(--ease);
  padding: 16px 0;
}

.nav.is-scrolled {
  padding: 10px 0;
  background: rgba(5, 8, 22, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.logo-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--blue-500), var(--accent));
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.4);
  position: relative;
  flex-shrink: 0;
}
.logo-mark::after {
  content: '';
  position: absolute;
  inset: 6px;
  border: 2px solid rgba(255, 255, 255, 0.6);
  border-radius: 4px;
  border-top: none;
  border-right: none;
}

.logo-text sup {
  font-size: 0.55em;
  font-weight: 600;
  color: var(--blue-400);
  margin-left: 2px;
}

.nav__links {
  display: flex;
  gap: 32px;
}
.nav__links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s;
  position: relative;
}
.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--blue-500), var(--accent));
  border-radius: 2px;
  transition: width 0.3s var(--ease);
}
.nav__links a:hover {
  color: var(--text-primary);
}
.nav__links a:hover::after {
  width: 100%;
}

.nav__cta {
  font-size: 0.85rem;
}

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav__burger span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s var(--ease);
}
.nav__burger.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__burger.is-active span:nth-child(2) {
  opacity: 0;
}
.nav__burger.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  width: 280px;
  height: 100vh;
  background: rgba(5, 8, 22, 0.95);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border-left: 1px solid var(--border);
  z-index: 99;
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 100px 28px 28px;
  transform: translateX(100%);
  transition: transform 0.4s var(--ease);
}
.mobile-menu.is-open {
  transform: translateX(0);
}
.mobile-menu a {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color 0.2s;
}
.mobile-menu a:hover {
  color: var(--text-primary);
}
.mobile-menu .btn {
  margin-top: 12px;
}

/* ============================================
   Hero
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
}

.hero__content {
  max-width: 760px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 100px;
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--blue-300);
  margin-bottom: 28px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.5);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.5); }
  70% { box-shadow: 0 0 0 10px rgba(34, 197, 94, 0); }
  100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); }
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--blue-400), var(--accent), var(--blue-500));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% 200%;
  animation: gradientShift 6s ease infinite;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.6;
}

.hero__actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.hero__trust {
  border-top: 1px solid var(--border);
  padding-top: 32px;
}
.hero__trust p {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.trust-logos {
  display: flex;
  gap: 32px;
  justify-content: center;
  flex-wrap: wrap;
}
.trust-logos span {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-muted);
  opacity: 0.6;
  transition: opacity 0.3s, color 0.3s;
}
.trust-logos span:hover {
  opacity: 1;
  color: var(--blue-400);
}

/* ============================================
   Sections
   ============================================ */
.section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 100px 24px;
}

.section__head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}

.section__eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--blue-400);
  margin-bottom: 12px;
}

.section__title {
  font-size: clamp(1.8rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 16px;
}

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

/* ============================================
   Features
   ============================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  padding: 32px;
  transition: transform 0.4s var(--ease), border-color 0.3s, background 0.3s;
}
.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  background: var(--surface-hover);
}

.feature-card__icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.2), rgba(56, 189, 248, 0.1));
  border: 1px solid rgba(59, 130, 246, 0.2);
  color: var(--blue-400);
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ============================================
   Stats
   ============================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-card {
  padding: 40px 24px;
  text-align: center;
  transition: transform 0.4s var(--ease);
}
.stat-card:hover {
  transform: translateY(-4px);
}

.stat-card__value {
  display: block;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--blue-400), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.stat-card__label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ============================================
   Pricing
   ============================================ */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
}

.price-card {
  padding: 36px 28px;
  text-align: center;
  transition: transform 0.4s var(--ease), border-color 0.3s;
  position: relative;
}
.price-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
}

.price-card--featured {
  border-color: rgba(59, 130, 246, 0.4);
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.08), var(--surface));
  box-shadow: 0 0 40px rgba(37, 99, 235, 0.1);
}

.price-card__tag {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 5px 16px;
  border-radius: 100px;
  background: linear-gradient(135deg, var(--blue-600), var(--blue-500));
  font-size: 0.7rem;
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
}

.price-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.price-card__price {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  color: var(--text-primary);
}
.price-card__price .currency {
  font-size: 1.2rem;
  vertical-align: top;
  color: var(--text-secondary);
}
.price-card__price .period {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.price-card__features {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
  text-align: left;
}
.price-card__features li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding-left: 24px;
  position: relative;
}
.price-card__features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: rgba(56, 189, 248, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.3);
}
.price-card__features li::after {
  content: '';
  position: absolute;
  left: 5px;
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
  width: 4px;
  height: 8px;
  border: solid var(--accent);
  border-width: 0 2px 2px 0;
}

/* ============================================
   CTA
   ============================================ */
.cta {
  max-width: 720px;
  margin: 0 auto;
  padding: 64px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta__glow {
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.2), transparent 70%);
  filter: blur(40px);
  z-index: -1;
  animation: ctaGlow 4s ease-in-out infinite alternate;
}
@keyframes ctaGlow {
  from { opacity: 0.5; }
  to { opacity: 1; }
}

.cta__title {
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.cta__desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 32px;
}

.cta__form {
  display: flex;
  gap: 12px;
  max-width: 480px;
  margin: 0 auto;
}

.cta__input {
  flex: 1;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.9rem;
  transition: border-color 0.3s;
}
.cta__input::placeholder {
  color: var(--text-muted);
}
.cta__input:focus {
  outline: none;
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.cta__success {
  display: none;
  color: var(--blue-300);
  font-size: 1rem;
  font-weight: 500;
  padding: 14px;
  animation: fadeIn 0.5s var(--ease);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   Footer
   ============================================ */
.footer {
  border-top: 1px solid var(--border);
  padding: 64px 24px 32px;
  margin-top: 40px;
}

.footer__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer__brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 16px;
  max-width: 280px;
}

.footer__links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.footer__links h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 16px;
  font-weight: 600;
}
.footer__links a {
  display: block;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
  transition: color 0.2s;
}
.footer__links a:hover {
  color: var(--blue-400);
}

.footer__bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
}
.footer__bottom p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ============================================
   Reveal animation
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 900px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 440px;
  }
  .footer__inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 640px) {
  .nav__links,
  .nav__cta {
    display: none;
  }
  .nav__burger {
    display: flex;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .stat-card {
    padding: 28px 16px;
  }

  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero__actions .btn {
    width: 100%;
  }

  .cta__form {
    flex-direction: column;
  }

  .footer__links {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .section {
    padding: 64px 20px;
  }
}