/* Augmenta AI Labs - Modern Minimalist Design 2025 */

:root {
  /* Color Palette - Contemporary neutrals with subtle accent */
  --color-bg: #FAFAFA;
  --color-surface: #FFFFFF;
  --color-text-primary: #0A0A0A;
  --color-text-secondary: #525252;
  --color-text-tertiary: #A3A3A3;
  --color-accent: #3B82F6;
  --color-accent-light: #60A5FA;
  --color-gradient-start: #3B82F6;
  --color-gradient-end: #8B5CF6;

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  --spacing-2xl: 8rem;

  /* Layout */
  --max-width: 1200px;
  --border-radius: 12px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.3s ease;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0A0A0A;
    --color-surface: #171717;
    --color-text-primary: #FAFAFA;
    --color-text-secondary: #A3A3A3;
    --color-text-tertiary: #525252;
  }
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.6;
  font-size: 16px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

a {
  color: var(--color-text-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* Navigation */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(250, 250, 250, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 1000;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

@media (prefers-color-scheme: dark) {
  nav {
    background: rgba(10, 10, 10, 0.8);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }
}

nav .container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

nav ul {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

nav ul li a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

nav ul li a:hover {
  color: var(--color-text-primary);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

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

  nav ul {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--color-surface);
    padding: var(--spacing-md);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-medium);
  }

  nav ul.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  nav ul li {
    padding: var(--spacing-sm) 0;
  }
}

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

section {
  padding: var(--spacing-2xl) 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

section:first-of-type {
  padding-top: calc(var(--spacing-2xl) + 80px);
}

/* Hero Section */
.hero {
  text-align: center;
}

.hero h1 {
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-text-primary), var(--color-text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  max-width: 800px;
  margin: 0 auto var(--spacing-lg);
}

.gradient-text {
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--border-radius);
  transition: all var(--transition-medium);
  cursor: pointer;
  border: none;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  color: white;
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text-primary);
  border: 2px solid rgba(0, 0, 0, 0.1);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Cards */
.card {
  background: var(--color-surface);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  transition: transform var(--transition-medium);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

@media (prefers-color-scheme: dark) {
  .card {
    border: 1px solid rgba(255, 255, 255, 0.05);
  }
}

.card:hover {
  transform: translateY(-4px);
}

/* Grid Layouts */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Content Sections */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.section-header h2 {
  margin-bottom: var(--spacing-sm);
}

.section-header p {
  max-width: 600px;
  margin: 0 auto;
}

/* Features */
.feature {
  text-align: center;
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  display: inline-block;
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.feature h3 {
  margin-bottom: var(--spacing-sm);
}

/* Footer */
footer {
  background: var(--color-surface);
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

@media (prefers-color-scheme: dark) {
  footer {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
  }
}

footer .container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
}

footer h4 {
  margin-bottom: var(--spacing-sm);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-tertiary);
}

footer ul {
  list-style: none;
}

footer ul li {
  margin-bottom: var(--spacing-xs);
}

footer ul li a {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
}

.footer-bottom {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  text-align: center;
  color: var(--color-text-tertiary);
  font-size: 0.875rem;
}

@media (prefers-color-scheme: dark) {
  .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
  }
}

/* Form Elements */
.form-group {
  margin-bottom: var(--spacing-md);
}

label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
  font-size: 0.9375rem;
}

input, textarea {
  width: 100%;
  padding: 1rem;
  border: 2px solid rgba(0, 0, 0, 0.1);
  border-radius: var(--border-radius);
  font-family: var(--font-primary);
  font-size: 1rem;
  background: var(--color-surface);
  color: var(--color-text-primary);
  transition: border-color var(--transition-fast);
}

@media (prefers-color-scheme: dark) {
  input, textarea {
    border: 2px solid rgba(255, 255, 255, 0.1);
  }
}

input:focus, textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

textarea {
  resize: vertical;
  min-height: 150px;
}

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

.fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}

/* Utilities */
.text-center {
  text-align: center;
}

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

/* Responsive */
@media (max-width: 768px) {
  section {
    padding: var(--spacing-xl) 0;
    min-height: auto;
  }

  section:first-of-type {
    padding-top: calc(var(--spacing-xl) + 80px);
  }

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