/* ==========================================
   Echo-Mind Website Styles
   A visionary product announcement website
   ========================================== */

/* Root Variables */
:root {
  /* Colors */
  --primary: #6366f1;
  --primary-light: #818cf8;
  --primary-dark: #4f46e5;
  --secondary: #8b5cf6;
  --accent: #06b6d4;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  
  /* Neutrals */
  --white: #ffffff;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --black: #000000;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-text: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  
  /* Typography */
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
  --font-family-heading: 'Space Grotesk', var(--font-family);
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  
  /* Borders */
  --border-radius: 0.5rem;
  --border-radius-lg: 0.75rem;
  --border-radius-xl: 1rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Transitions */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  line-height: 1.6;
  color: var(--gray-800);
  background-color: var(--white);
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-4);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.875rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.125rem; }

p {
  margin-bottom: var(--space-4);
  color: var(--gray-600);
}

/* Utilities */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

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

.section-badge {
  display: inline-block;
  padding: var(--space-2) var(--space-4);
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--space-6);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-header.centered {
  text-align: center;
}

.section-title {
  font-size: 3rem;
  margin-bottom: var(--space-6);
  color: var(--gray-900);
}

.section-description {
  font-size: 1.25rem;
  color: var(--gray-600);
  max-width: 600px;
  margin: 0 auto;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-200);
  z-index: 1000;
  transition: var(--transition);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  display: flex;
  flex-direction: column;
}

.logo-text {
  font-family: var(--font-family-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-900);
}

.logo-subtitle {
  font-size: 0.75rem;
  color: var(--gray-500);
  margin-top: -2px;
}

.nav-links {
  display: flex;
  gap: var(--space-8);
}

.nav-link {
  color: var(--gray-700);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width 0.3s ease;
}

.nav-link:hover::after {
  width: 100%;
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><radialGradient id="a" cx="50%" cy="50%"><stop offset="0%" stop-color="%23ffffff" stop-opacity="0.1"/><stop offset="100%" stop-color="%23ffffff" stop-opacity="0"/></radialGradient></defs><circle cx="50%" cy="50%" r="50%" fill="url(%23a)"/></svg>');
  opacity: 0.5;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.8) 0%, rgba(118, 75, 162, 0.8) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  padding: var(--space-3) var(--space-6);
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 50px;
  color: white;
  font-weight: 600;
  margin-bottom: var(--space-8);
  backdrop-filter: blur(10px);
}

.hero-title {
  font-size: 4rem;
  color: white;
  margin-bottom: var(--space-6);
  line-height: 1.1;
}

.hero-description {
  font-size: 1.5rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-10);
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  gap: var(--space-6);
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  border: none;
  border-radius: var(--border-radius-lg);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: white;
  color: var(--primary);
  box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.2);
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

.btn.full-width {
  width: 100%;
  justify-content: center;
}

/* Vision Section */
.vision {
  padding: var(--space-24) 0;
  background: var(--gray-50);
}

.vision-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-8);
  margin-top: var(--space-16);
}

.vision-card {
  background: white;
  padding: var(--space-8);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-md);
  text-align: center;
  transition: var(--transition);
  border: 1px solid var(--gray-200);
}

.vision-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.vision-icon {
  font-size: 3rem;
  margin-bottom: var(--space-6);
  display: block;
}

.vision-card h3 {
  color: var(--gray-900);
  margin-bottom: var(--space-4);
}

.vision-card p {
  color: var(--gray-600);
  line-height: 1.6;
}

/* Technology Section */
.technology {
  padding: var(--space-24) 0;
  background: white;
}

.tech-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-8);
  margin-top: var(--space-16);
}

.tech-feature {
  display: flex;
  gap: var(--space-6);
  padding: var(--space-6);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--gray-200);
  transition: var(--transition);
}

.tech-feature:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.tech-feature-icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.tech-feature h4 {
  color: var(--gray-900);
  margin-bottom: var(--space-2);
}

.tech-feature p {
  color: var(--gray-600);
  margin-bottom: 0;
}

/* Future Section */
.future {
  padding: var(--space-24) 0;
  background: var(--gray-50);
}

.industries-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-16);
}

.industry-card {
  background: white;
  padding: var(--space-6);
  border-radius: var(--border-radius-lg);
  text-align: center;
  transition: var(--transition);
  border: 1px solid var(--gray-200);
}

.industry-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.industry-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-4);
  display: block;
}

.industry-card h3 {
  color: var(--gray-900);
  margin-bottom: var(--space-3);
}

.industry-card p {
  color: var(--gray-600);
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* Contact Section */
.contact {
  padding: var(--space-24) 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.contact-text h2 {
  color: white;
  font-size: 3rem;
  margin-bottom: var(--space-6);
}

.contact-text p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.25rem;
}

.contact-form {
  background: rgba(255, 255, 255, 0.1);
  padding: var(--space-8);
  border-radius: var(--border-radius-xl);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.contact-form h3 {
  color: white;
  margin-bottom: var(--space-6);
  text-align: center;
}

.form-group {
  margin-bottom: var(--space-6);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--space-4);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--border-radius);
  background: rgba(255, 255, 255, 0.1);
  color: white;
  font-size: 1rem;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255, 255, 255, 0.7);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.2);
}

.form-group textarea {
  height: 120px;
  resize: vertical;
}

/* Footer */
.footer {
  background: var(--gray-900);
  color: white;
  padding: var(--space-16) 0 var(--space-8) 0;
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  margin-bottom: var(--space-12);
}

.footer-brand .logo-text {
  color: white;
}

.footer-brand p {
  color: var(--gray-400);
  margin-top: var(--space-4);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-8);
}

.footer-section h4 {
  color: white;
  margin-bottom: var(--space-4);
  font-size: 1.125rem;
}

.footer-section a {
  display: block;
  color: var(--gray-400);
  text-decoration: none;
  margin-bottom: var(--space-2);
  transition: var(--transition);
}

.footer-section a:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-8);
  border-top: 1px solid var(--gray-700);
}

.footer-bottom p {
  color: var(--gray-400);
  margin: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-description {
    font-size: 1.25rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  
  .contact-text h2 {
    font-size: 2rem;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  
  .nav-links {
    display: none;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-4);
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.5rem; }
}

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

.vision-card,
.tech-feature,
.industry-card {
  animation: fadeInUp 0.6s ease-out;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
  background: var(--gray-400);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gray-500);
}