/* ========================================
   NEITHERPHONE - "The Astonishing" Design System
   "Neither This. Nor That."
   Theme: Acid Pop / Electric Void
   ======================================== */

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

:root {
  /* --- Color Palette: Acid Pop --- */
  --bg-deep: #050505;
  /* True Void */
  --bg-surface: #121212;

  /* Primary Accents - High Contrast */
  --color-primary: #ccff00;
  /* Acid Lime */
  --color-secondary: #9d00ff;
  /* Electric Violet */
  --color-accent: #00ffff;
  /* Neon Cyan */

  /* Gradients */
  --gradient-main: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  --gradient-glow: linear-gradient(135deg, rgba(204, 255, 0, 0.4), rgba(157, 0, 255, 0.4));
  --gradient-text: linear-gradient(to right, #ccff00 0%, #00ffff 50%, #9d00ff 100%);

  /* Neutrals */
  --text-main: #ffffff;
  --text-muted: #a1a1aa;
  --text-dark: #000000;
  --border-light: rgba(255, 255, 255, 0.15);

  /* --- Glassmorphism --- */
  --glass-bg: rgba(18, 18, 18, 0.7);
  --glass-blur: blur(30px);
  --glass-border: 1px solid rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);

  /* --- Typography --- */
  --font-body: 'Inter', sans-serif;
  --font-display: 'Outfit', sans-serif;
  --font-mono: 'Space Grotesk', monospace;

  /* --- Spacing --- */
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --container-width: 1280px;
  --radius-lg: 32px;

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

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

body {
  background-color: var(--bg-deep);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* Background Mesh Gradient - Acid Pop Edition */
body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background:
    radial-gradient(circle at center, rgba(157, 0, 255, 0.08), transparent 45%),
    /* Violet */
    radial-gradient(circle at 80% 20%, rgba(204, 255, 0, 0.06), transparent 40%),
    /* Lime */
    radial-gradient(circle at 20% 80%, rgba(0, 255, 255, 0.06), transparent 40%);
  /* Cyan */
  z-index: -1;
  animation: pulse-bg 15s infinite alternate ease-in-out;
  pointer-events: none;
}

@keyframes pulse-bg {
  0% {
    transform: scale(1) rotate(0deg);
    opacity: 0.5;
  }

  100% {
    transform: scale(1.1) rotate(2deg);
    opacity: 0.8;
  }
}

/* Typography */
h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  color: var(--text-main);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(3.5rem, 8vw, 6.5rem);
  letter-spacing: -0.04em;
}

h2 {
  font-size: clamp(2.5rem, 5vw, 4rem);
}

h3 {
  font-size: 1.75rem;
}

.text-gradient {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}

.text-accent {
  color: var(--color-primary);
}

.text-muted {
  color: var(--text-muted);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s;
}

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

/* Layout */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section {
  padding: var(--space-xl) 0;
  position: relative;
}

.grid {
  display: grid;
  gap: var(--space-md);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.grid-5 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

@media (max-width: 1024px) {

  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  padding: var(--space-sm) 0;
  background: rgba(5, 5, 5, 0.8);
  backdrop-filter: var(--glass-blur);
  border-bottom: var(--glass-border);
  transition: all 0.3s var(--ease-out);
}

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

.navbar-logo {
  font-family: var(--font-mono);
  /* Tech feel */
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.navbar-logo span {
  color: var(--color-primary);
}

.navbar-nav {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
}

.navbar-nav a {
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.8;
}

.navbar-nav a:hover,
.navbar-nav a.active {
  opacity: 1;
  color: var(--color-primary);
  text-shadow: 0 0 20px rgba(204, 255, 0, 0.6);
  /* Lime Glow */
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: block;
  }

  .navbar-nav,
  .navbar-cta {
    display: none;
  }

  .navbar-nav.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--bg-deep);
    padding: var(--space-lg);
    border-bottom: var(--glass-border);
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 9999px;
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all 0.3s var(--ease-out);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--text-dark);
  border: none;
}

.btn-primary:hover {
  background: #d4fc45;
  box-shadow: 0 0 30px rgba(204, 255, 0, 0.5);
  transform: translateY(-2px) scale(1.02);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-light);
  color: var(--text-main);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  background: rgba(204, 255, 0, 0.1);
  color: var(--color-primary);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1rem;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
}

/* Cards */
.card {
  background: var(--glass-bg);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  backdrop-filter: blur(20px);
  transition: all 0.4s var(--ease-out);
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-8px);
  border-color: rgba(204, 255, 0, 0.3);
  /* Lime border */
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(204, 255, 0, 0.1);
}

.card h3 {
  margin-bottom: 0.5rem;
  font-size: 1.5rem;
}

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

/* Product Badges */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-main);
}

.badge-accent {
  background: var(--color-primary);
  color: var(--bg-deep);
  border: none;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 80px;
  position: relative;
}

.hero-content {
  max-width: 900px;
  z-index: 10;
  animation: fade-in-up 1s var(--ease-out) forwards;
  opacity: 0;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-stat-value {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  text-shadow: 0 0 25px rgba(204, 255, 0, 0.4);
}

.hero-stat-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

/* Feature Cards */
.feature-icon {
  width: 60px;
  height: 60px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
  transition: all 0.4s var(--ease-out);
}

.card:hover .feature-icon {
  background: var(--color-primary);
  color: var(--bg-deep);
  transform: scale(1.1) rotate(5deg);
  box-shadow: 0 0 25px rgba(204, 255, 0, 0.6);
}

/* Comparison Table */
.compare-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-top: var(--space-lg);
}

.compare-table th,
.compare-table td {
  padding: 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  text-align: left;
}

.compare-table th {
  font-family: var(--font-display);
  color: var(--text-muted);
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}

.compare-table td {
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.compare-table tr:hover td {
  background: rgba(255, 255, 255, 0.03);
}

.compare-highlight {
  color: var(--color-primary);
  font-weight: 600;
}

/* Footers */
.footer {
  background: var(--bg-deep);
  border-top: var(--glass-border);
  padding: var(--space-xl) 0;
  margin-top: var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-xl);
}

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

.footer h4 {
  margin-bottom: 1rem;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.footer-links {
  list-style: none;
}

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

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

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

.footer-bottom {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  justify-content: space-between;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.footer-social {
  display: flex;
  gap: 1rem;
  font-size: 1.2rem;
}

/* Animations */
@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in-up {
  animation: fade-in-up 1s var(--ease-out) forwards;
}

.stagger>* {
  opacity: 0;
  animation: fade-in-up 0.8s var(--ease-out) forwards;
}

.stagger>*:nth-child(1) {
  animation-delay: 0.1s;
}

.stagger>*:nth-child(2) {
  animation-delay: 0.2s;
}

.stagger>*:nth-child(3) {
  animation-delay: 0.3s;
}

.stagger>*:nth-child(4) {
  animation-delay: 0.4s;
}

.stagger>*:nth-child(5) {
  animation-delay: 0.5s;
}