/* CSS Design System and Stylesheet for Aether */

:root {
  /* Color Palette */
  --bg-color-raw: 11, 15, 25;
  --bg-color: rgb(var(--bg-color-raw));
  --bg-card: rgba(17, 25, 40, 0.65);
  --bg-glass-raw: 20, 26, 42;
  --bg-glass: rgba(var(--bg-glass-raw), 0.7);
  
  --primary-color: #8b5cf6; /* Electric Purple */
  --primary-glow: rgba(139, 92, 246, 0.3);
  --secondary-color: #3b82f6; /* Royal Blue */
  --secondary-glow: rgba(59, 130, 246, 0.3);
  --accent-color: #06b6d4; /* Neon Cyan */
  
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  --border-focus: #8b5cf6;
  
  --success-color: #10b981;
  --error-color: #ef4444;

  /* Typography */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-title: 'Outfit', sans-serif;
  
  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-body);
}

body {
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Scroll Progress Bar */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(to right, var(--secondary-color), var(--primary-color), var(--accent-color));
  transform-origin: 0 50%;
  transform: scaleX(0);
  z-index: 1000;
  transition: transform 0.1s ease-out;
}

/* Global Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Typography elements */
h1, h2, h3, h4 {
  font-family: var(--font-title);
  font-weight: 700;
  line-height: 1.2;
}

/* Scroll reveals */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-on-scroll.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-title);
  font-weight: 600;
  text-decoration: none;
  border-radius: 8px;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: #fff;
  box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--primary-glow);
  filter: brightness(1.1);
}

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

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border-color: var(--border-color);
}

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

.btn-secondary:active {
  transform: translateY(0);
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
}

.btn-icon {
  margin-left: 0.5rem;
  transition: transform var(--transition-fast);
}

.btn:hover .btn-icon {
  transform: translate(2px, -2px);
}

/* Badge */
.badge {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  font-family: var(--font-title);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(139, 92, 246, 0.1);
  color: var(--accent-color);
  border: 1px solid rgba(139, 92, 246, 0.2);
  margin-bottom: 1.5rem;
}

/* Header & Nav */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 70px;
  display: flex;
  align-items: center;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
  transition: background-color var(--transition-normal);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: 0.1em;
  color: var(--text-primary);
  text-decoration: none;
}

.logo-icon {
  width: 12px;
  height: 12px;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  border-radius: 50%;
  position: relative;
  box-shadow: 0 0 10px var(--primary-color);
}

.logo-icon::after {
  content: '';
  position: absolute;
  top: -3px;
  left: -3px;
  right: -3px;
  bottom: -3px;
  border: 1px solid var(--accent-color);
  border-radius: 50%;
  opacity: 0.5;
}

.nav-menu {
  display: flex;
  gap: 2rem;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
  padding: 0.25rem 0;
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--primary-color);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-fast) ease-out;
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-link.active {
  color: var(--text-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.menu-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  display: none; /* Hidden on desktop */
}

.hamburger {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  position: relative;
  transition: background-color var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  transition: transform var(--transition-fast), top var(--transition-fast);
}

.hamburger::before {
  top: -6px;
}

.hamburger::after {
  top: 6px;
}

/* Mobile Toggle active states */
.menu-toggle[aria-expanded="true"] .hamburger {
  background-color: transparent;
}

.menu-toggle[aria-expanded="true"] .hamburger::before {
  top: 0;
  transform: rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .hamburger::after {
  top: 0;
  transform: rotate(-45deg);
}

/* Mobile Nav Dropdown */
.mobile-nav {
  position: fixed;
  top: 70px;
  left: 0;
  width: 100%;
  background: rgba(var(--bg-glass-raw), 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  gap: 1.25rem;
  z-index: 99;
  transform: translateY(-110%);
  transition: transform var(--transition-normal);
}

.mobile-nav.active {
  transform: translateY(0);
}

.mobile-nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-family: var(--font-title);
  font-size: 1.125rem;
  font-weight: 600;
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.mobile-nav-link:hover {
  color: var(--text-primary);
}

.mobile-nav-actions {
  margin-top: 0.5rem;
}

/* Hero Section */
.hero {
  position: relative;
  padding: 140px 0 100px;
  overflow: hidden;
  display: flex;
  align-items: center;
  min-height: 85vh;
}

.hero-bg-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--primary-glow) 0%, rgba(0, 0, 0, 0) 70%);
  top: -10%;
  right: -10%;
  z-index: -1;
  filter: blur(60px);
}

.hero-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero-content {
  max-width: 800px;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent-color), var(--primary-color) 60%, var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  max-width: 650px;
  margin-left: auto;
  margin-right: auto;
  font-weight: 300;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

/* Features Section */
.features {
  padding: 100px 0;
  background: radial-gradient(circle at 50% 100%, rgba(139, 92, 246, 0.05) 0%, rgba(0, 0, 0, 0) 50%);
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 4rem;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.section-subtitle {
  color: var(--text-secondary);
  font-weight: 300;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.feature-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2.5rem 2rem;
  overflow: hidden;
  transition: all var(--transition-normal);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(300px circle at var(--x, 0px) var(--y, 0px), rgba(255, 255, 255, 0.04), transparent 40%);
  z-index: 1;
  pointer-events: none;
}

.card-glow {
  position: absolute;
  width: 150px;
  height: 150px;
  background: radial-gradient(circle, var(--primary-glow) 0%, rgba(0,0,0,0) 70%);
  top: -75px;
  right: -75px;
  z-index: 0;
  opacity: 0.5;
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.feature-card:hover .card-glow {
  opacity: 1;
  transform: scale(1.2);
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-hover);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.card-icon-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  border-radius: 12px;
  background: rgba(139, 92, 246, 0.1);
  color: var(--primary-color);
  margin-bottom: 1.5rem;
  position: relative;
  z-index: 2;
  transition: all var(--transition-fast);
}

.feature-card:hover .card-icon-wrapper {
  background: var(--primary-color);
  color: #fff;
  box-shadow: 0 0 15px var(--primary-glow);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.85rem;
  position: relative;
  z-index: 2;
}

.card-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 300;
  position: relative;
  z-index: 2;
}

/* Contact Section */
.contact {
  padding: 100px 0;
}

.contact-container {
  display: flex;
  justify-content: center;
}

.contact-card {
  width: 100%;
  max-width: 680px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 3rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.contact-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  font-family: var(--font-title);
  letter-spacing: 0.02em;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}

.form-group input:hover,
.form-group textarea:hover {
  border-color: var(--border-hover);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  background: rgba(0, 0, 0, 0.3);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

/* Modern Validation Selector Styling */
.form-group input:user-invalid,
.form-group textarea:user-invalid {
  border-color: var(--error-color);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

.form-group input:user-valid,
.form-group textarea:user-valid {
  border-color: var(--success-color);
}

/* Validation Class Fallbacks */
.touched:invalid {
  border-color: var(--error-color);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

.touched:valid {
  border-color: var(--success-color);
}

.error-message {
  display: none;
  color: var(--error-color);
  font-size: 0.775rem;
  margin-top: 0.15rem;
}

.form-group input:user-invalid ~ .error-message,
.form-group textarea:user-invalid ~ .error-message,
.touched:invalid ~ .error-message {
  display: block;
}

.form-status {
  text-align: center;
  font-size: 0.925rem;
  padding: 0.75rem;
  border-radius: 8px;
  display: none;
}

.form-status.success {
  display: block;
  background: rgba(16, 185, 129, 0.1);
  color: var(--success-color);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.form-status.error {
  display: block;
  background: rgba(239, 68, 68, 0.1);
  color: var(--error-color);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Footer styling */
.footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border-color);
  background-color: rgba(0, 0, 0, 0.3);
}

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

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.footer-logo .logo-icon {
  width: 10px;
  height: 10px;
  background: var(--text-muted);
  box-shadow: none;
}

.footer-logo .logo-icon::after {
  display: none;
}

.footer-text {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 300;
}

/* Responsive Media Queries */

@media (max-width: 992px) {
  .hero-title {
    font-size: 3rem;
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  /* Layout adjustments */
  .nav-menu {
    display: none; /* Hide desktop nav */
  }
  
  .menu-toggle {
    display: block; /* Show hamburger toggle */
  }
  
  .hero {
    padding: 120px 0 80px;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-description {
    font-size: 1.05rem;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .contact-card {
    padding: 2rem 1.5rem;
  }
  
  .form-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .footer-container {
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-actions {
    flex-direction: column;
    width: 100%;
    gap: 0.75rem;
  }
  
  .hero-actions .btn {
    width: 100%;
  }
}