:root {
  --bg-dark: #070b10;
  --bg-gradient-1: #0c1a2a;
  --bg-gradient-2: #14405c;
  --bg-gradient-3: #1a6b8a;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-hover: rgba(255, 255, 255, 0.08);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.15);
  --text: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-dim: rgba(255, 255, 255, 0.45);
  --accent: #4dd4e5;
  --accent-bright: #7eeef8;
  --accent-glow: rgba(77, 212, 229, 0.25);

  --font: "Outfit", system-ui, -apple-system, sans-serif;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-size: 16px;
}

body {
  font-family: var(--font);
  background: var(--bg-dark);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* Background layers */
.bg-gradient {
  position: fixed;
  inset: -100px;
  background: 
    radial-gradient(ellipse 100% 80% at 50% 100%, var(--bg-gradient-3) 0%, transparent 50%),
    radial-gradient(ellipse 80% 60% at 80% 80%, var(--bg-gradient-2) 0%, transparent 45%),
    radial-gradient(ellipse 60% 50% at 20% 90%, var(--bg-gradient-1) 0%, transparent 40%),
    linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-gradient-1) 100%);
  transition: transform 0.4s ease-out;
  pointer-events: none;
}

.grid-overlay {
  position: fixed;
  inset: 0;
  background-image: 
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.3;
  pointer-events: none;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 100%, black 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 100%, black 0%, transparent 70%);
}

.noise {
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: 0.025;
  pointer-events: none;
  z-index: 1;
}

/* Floating elements */
.floating-elements {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 5;
  overflow: hidden;
}

.float-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  background: var(--surface);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  opacity: 0;
  animation: floatIn 1s var(--ease) forwards;
  transition: transform 0.3s ease-out;
}

.float-icon {
  font-size: 0.9rem;
}

.float-1 {
  top: 18%;
  left: 8%;
  animation-delay: 1.5s;
}

.float-2 {
  top: 35%;
  right: 10%;
  animation-delay: 2s;
}

.float-3 {
  bottom: 30%;
  left: 12%;
  animation-delay: 2.5s;
}

@keyframes floatIn {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.9);
  }
  to {
    opacity: 0.8;
    transform: translateY(0) scale(1);
  }
}

@media (max-width: 900px) {
  .floating-elements {
    display: none;
  }
}

/* Main container */
.main {
  position: relative;
  z-index: 10;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 1.5rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

/* Navigation */
.nav {
  display: flex;
  justify-content: center;
  padding: 1rem 0;
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeIn 1s var(--ease) 0.1s forwards;
}

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

.logo {
  display: flex;
  align-items: center;
}

.logo-text {
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.logo-ai {
  color: var(--accent);
  font-weight: 500;
}

/* Content */
.content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 2rem 0;
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 1.1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeIn 1s var(--ease) 0.2s forwards;
}

.badge-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
  box-shadow: 0 0 10px var(--accent);
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

/* Headline */
.headline {
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  max-width: 750px;
  opacity: 0;
  animation: revealText 1.2s var(--ease) 0.3s forwards;
}

@keyframes revealText {
  from {
    opacity: 0;
    transform: translateY(30px);
    filter: blur(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
  }
}

.highlight {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-bright) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Subtext */
.subtext {
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--text-dim);
  line-height: 1.7;
  max-width: 540px;
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: fadeIn 1s var(--ease) 0.5s forwards;
}

/* Form */
.form {
  width: 100%;
  max-width: 480px;
  opacity: 0;
  animation: fadeIn 1s var(--ease) 0.7s forwards;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

@media (min-width: 500px) {
  .form-row {
    flex-direction: row;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 0.4rem;
    transition: all 0.3s ease;
  }

  .form-row:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-glow);
  }

  .form-row input[type="email"] {
    border: none !important;
    background: transparent !important;
    border-radius: 0 !important;
  }
}

input[type="email"] {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  font-family: var(--font);
  font-size: 0.95rem;
  color: var(--text);
  outline: none;
  transition: all 0.3s ease;
}

input[type="email"]:focus {
  border-color: var(--accent);
}

input[type="email"]::placeholder {
  color: var(--text-dim);
}

button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-bright) 100%);
  color: var(--bg-dark);
  border: none;
  border-radius: 10px;
  padding: 1rem 1.5rem;
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s var(--ease);
  white-space: nowrap;
}

@media (max-width: 499px) {
  button {
    width: 100%;
  }
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 35px var(--accent-glow);
}

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

.btn-arrow {
  transition: transform 0.3s var(--ease);
}

button:hover .btn-arrow {
  transform: translateX(3px);
}

button.success {
  background: linear-gradient(135deg, #00c9a7 0%, #00e5bf 100%);
}

.form-hint {
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* Features */
.features {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-top: 3rem;
  opacity: 0;
  animation: fadeIn 1s var(--ease) 0.9s forwards;
}

.feature {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.3s ease;
}

.feature:hover {
  background: var(--surface-hover);
  border-color: var(--border-strong);
}

.feature-icon {
  font-size: 1rem;
}

/* Footer */
.footer {
  text-align: center;
  padding: 2rem 0;
  font-size: 0.8rem;
  color: var(--text-dim);
  opacity: 0;
  animation: fadeIn 1s var(--ease) 1.1s forwards;
}

/* Selection */
::selection {
  background: var(--accent);
  color: var(--bg-dark);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-gradient-1);
  border-radius: 3px;
}

/* Responsive */
@media (max-width: 600px) {
  .main {
    padding: 1rem 1.25rem;
  }

  .nav {
    margin-bottom: 1rem;
  }

  .badge {
    font-size: 0.7rem;
    padding: 0.4rem 0.9rem;
  }

  .subtext {
    font-size: 1rem;
  }

  .features {
    gap: 0.75rem;
  }

  .feature {
    font-size: 0.75rem;
    padding: 0.5rem 0.8rem;
  }
}