/* DevPost - LinkedIn × GitHub Hybrid Design System */
/* Color Palette */
:root {
  /* LinkedIn Colors */
  --primary-blue: #0A66C2;
  --primary-blue-hover: #004182;
  --deep-navy: #004182;

  /* GitHub Colors */
  --github-dark: #0D1117;
  --github-canvas: #F6F8FA;
  --github-border: #d0d7de;
  --accent-green: #2EA043;
  --accent-purple: #8250DF;

  /* Neutrals */
  --text-heading: #1B1F23;
  --text-body: #57606A;
  --text-muted: #8b949e;
  --surface-white: #FFFFFF;
  --surface-light: #FAFBFC;

  /* Accents */
  --accent-orange: #F78166;
  --accent-yellow: #E3B341;

  /* Semantic */
  --success: #2EA043;
  --error: #CF222E;
  --warning: #BF8700;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Borders */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-glow-blue: 0 0 20px rgba(10, 102, 194, 0.3);
  --shadow-glow-green: 0 0 20px rgba(46, 160, 67, 0.3);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Typography */
  --font-display: 'Poppins', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --font-accent: 'Lora', serif;
  --font-label: 'Roboto Condensed', sans-serif;

  /* Fluid Type Scale */
  --text-xs: clamp(0.75rem, 2vw, 0.875rem);
  --text-sm: clamp(0.875rem, 2vw, 1rem);
  --text-base: clamp(1rem, 2vw, 1.125rem);
  --text-lg: clamp(1.125rem, 2.5vw, 1.25rem);
  --text-xl: clamp(1.25rem, 3vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 4vw, 1.875rem);
  --text-3xl: clamp(1.875rem, 5vw, 2.25rem);
  --text-4xl: clamp(2.25rem, 6vw, 3rem);
  --text-5xl: clamp(2.5rem, 7vw, 3.5rem);
}

/* Dark Mode */
[data-theme="dark"] {
  --github-dark: #0D1117;
  --github-canvas: #161B22;
  --github-border: #30363D;
  --text-heading: #F0F6FC;
  --text-body: #8B949E;
  --text-muted: #6E7681;
  --surface-white: #161B22;
  --surface-light: #0D1117;
  --surface-card: #21262D;
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}

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

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

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-body);
  background-color: var(--surface-white);
  overflow-x: hidden;
}

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

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
  margin-bottom: var(--space-md);
}

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

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

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-narrow {
  max-width: 800px;
}

.container-wide {
  max-width: 1400px;
}

/* Header / Navbar */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--surface-white);
  border-bottom: 1px solid var(--github-border);
  transition: all var(--transition-base);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.95);
}

[data-theme="dark"] .header.scrolled {
  background: rgba(22, 27, 34, 0.95);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  padding: 0 var(--space-lg);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xl);
  color: var(--text-heading);
  text-decoration: none;
}

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

.brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary-blue), var(--accent-purple));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: var(--text-lg);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
}

.nav-link {
  font-family: var(--font-body);
  font-weight: 500;
  color: var(--text-body);
  padding: var(--space-sm) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-blue);
  transition: width var(--transition-base);
}

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

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-label);
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  text-decoration: none;
}

.btn::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  pointer-events: none;
  background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 70%);
  transform: scale(0);
  opacity: 0;
}

.btn:active::after {
  transform: scale(2);
  opacity: 1;
  transition: 0s;
}

.btn-primary {
  background: var(--primary-blue);
  color: white;
}

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

.btn-secondary {
  background: transparent;
  color: var(--primary-blue);
  border: 2px solid var(--primary-blue);
}

.btn-secondary:hover {
  background: var(--primary-blue);
  color: white;
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-body);
}

.btn-ghost:hover {
  background: var(--github-canvas);
  color: var(--text-heading);
}

.btn-success {
  background: var(--accent-green);
  color: white;
}

.btn-success:hover {
  background: #2c974b;
  transform: translateY(-2px);
}

.btn-lg {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--text-base);
}

.btn-sm {
  padding: var(--space-xs) var(--space-md);
  font-size: var(--text-xs);
}

.btn:active {
  transform: scale(0.96);
}

/* Mobile Menu */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-sm);
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-heading);
  transition: all var(--transition-base);
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(72px + var(--space-4xl)) 0 var(--space-4xl);
  position: relative;
  overflow: hidden;
  background: var(--surface-white);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.hero-text h1 {
  margin-bottom: var(--space-lg);
}

.hero-text h1 .highlight {
  background: linear-gradient(135deg, var(--primary-blue), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-text .subtitle {
  font-size: var(--text-lg);
  color: var(--text-body);
  margin-bottom: var(--space-xl);
  max-width: 500px;
}

.hero-cta {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* Hero Visual / 3D Mockup */
.hero-visual {
  position: relative;
  perspective: 1000px;
}

.mockup-container {
  position: relative;
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
  transform-style: preserve-3d;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotateY(-5deg); }
  50% { transform: translateY(-20px) rotateY(5deg); }
}

.card-mockup {
  background: var(--surface-white);
  border: 1px solid var(--github-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--space-lg);
  transition: all var(--transition-slow);
}

.card-mockup.github {
  transform: rotateY(-15deg) translateZ(-50px);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
}

.card-mockup.linkedin {
  transform: rotateY(0deg) translateZ(50px);
  position: relative;
  border-left: 4px solid var(--primary-blue);
}

.card-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--github-border);
}

.card-header .repo-icon {
  width: 32px;
  height: 32px;
  background: var(--github-canvas);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-header .repo-name {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--accent-purple);
}

.card-content {
  font-size: var(--text-sm);
  line-height: 1.7;
}

.card-content h4 {
  font-size: var(--text-base);
  margin-bottom: var(--space-sm);
}

.card-content ul {
  margin-left: var(--space-lg);
  margin-bottom: var(--space-md);
}

.card-content li {
  margin-bottom: var(--space-xs);
}

/* Floating 3D Icons Background */
.floating-icons {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}

.floating-icon {
  position: absolute;
  opacity: 0.08;
  will-change: transform;
}

.floating-icon svg {
  width: 64px;
  height: 64px;
}

/* Sections */
.section {
  padding: var(--space-4xl) 0;
}

.section-dark {
  background: var(--github-dark);
  color: white;
}

.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: white;
}

.section-light {
  background: var(--github-canvas);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-3xl);
}

.section-header h2 {
  margin-bottom: var(--space-md);
}

.section-header p {
  font-size: var(--text-lg);
  color: var(--text-body);
}

.section-dark .section-header p {
  color: rgba(255, 255, 255, 0.7);
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.feature-card {
  background: var(--surface-white);
  border: 1px solid var(--github-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-base);
  cursor: pointer;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-blue);
}

.feature-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--github-canvas), var(--surface-white));
  border: 1px solid var(--github-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  color: var(--primary-blue);
}

.feature-card h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-sm);
}

.feature-card p {
  color: var(--text-body);
  margin-bottom: 0;
}

/* How It Works Timeline */
.how-it-works {
  position: relative;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: var(--github-border);
}

.timeline-step {
  text-align: center;
  position: relative;
}

.step-number {
  width: 80px;
  height: 80px;
  background: var(--surface-white);
  border: 2px solid var(--primary-blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-lg);
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--primary-blue);
  position: relative;
  z-index: 1;
}

.timeline-step h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-sm);
}

.timeline-step p {
  font-size: var(--text-sm);
  color: var(--text-body);
  margin-bottom: 0;
}

/* Testimonials */
.testimonials-wrapper {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.testimonial-carousel {
  overflow: hidden;
}

.testimonial-track {
  display: flex;
  transition: transform var(--transition-slow);
}

.testimonial-slide {
  min-width: 100%;
  padding: var(--space-xl);
}

.testimonial-card {
  background: var(--surface-white);
  border: 1px solid var(--github-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
}

.testimonial-quote {
  font-family: var(--font-accent);
  font-style: italic;
  font-size: var(--text-lg);
  color: var(--text-heading);
  margin-bottom: var(--space-lg);
  line-height: 1.8;
}

.testimonial-author {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
}

.author-avatar {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary-blue), var(--accent-purple));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
}

.author-info h4 {
  font-size: var(--text-base);
  margin-bottom: 0;
}

.author-info p {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-bottom: 0;
}

.testimonial-dots {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--github-border);
  cursor: pointer;
  transition: all var(--transition-base);
}

.dot.active {
  background: var(--primary-blue);
  transform: scale(1.2);
}

/* Footer */
.footer {
  background: var(--github-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-brand {
  max-width: 300px;
}

.footer-brand .nav-brand {
  color: white;
  margin-bottom: var(--space-md);
}

.footer-brand p {
  font-size: var(--text-sm);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.footer-social {
  display: flex;
  gap: var(--space-md);
}

.social-badge {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
  text-decoration: none;
}

.social-badge.linkedin {
  background: #0A66C2;
}

.social-badge.github {
  background: #24292F;
  border: 1px solid #30363D;
}

.social-badge.twitter {
  background: #000;
}

.social-badge.instagram {
  background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
}

.social-badge.youtube {
  background: #FF0000;
}

.social-badge:hover {
  transform: scale(1.12);
  box-shadow: 0 0 15px currentColor;
}

.social-badge svg {
  width: 18px;
  height: 18px;
  fill: white;
}

.footer-column h4 {
  color: white;
  font-size: var(--text-sm);
  font-family: var(--font-label);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--space-lg);
}

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

.footer-links li {
  margin-bottom: var(--space-sm);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.6);
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-bottom p {
  font-size: var(--text-sm);
  margin-bottom: 0;
}

.footer-legal {
  display: flex;
  gap: var(--space-lg);
}

.footer-legal a {
  color: rgba(255, 255, 255, 0.6);
  font-size: var(--text-sm);
}

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

/* Theme Toggle */
.theme-toggle {
  width: 44px;
  height: 24px;
  background: var(--github-canvas);
  border: 1px solid var(--github-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  position: relative;
  transition: all var(--transition-base);
}

.theme-toggle::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  background: var(--surface-white);
  border-radius: 50%;
  top: 2px;
  left: 2px;
  transition: transform var(--transition-base);
  box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .theme-toggle {
  background: var(--primary-blue);
}

[data-theme="dark"] .theme-toggle::after {
  transform: translateX(20px);
}

/* Cards */
.card {
  background: var(--surface-white);
  border: 1px solid var(--github-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

.card-header {
  margin-bottom: var(--space-lg);
}

.card-title {
  font-size: var(--text-xl);
  margin-bottom: 0;
}

/* Forms */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--space-sm);
  color: var(--text-heading);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-md);
  font-family: var(--font-body);
  font-size: var(--text-base);
  border: 1px solid var(--github-border);
  border-radius: var(--radius-md);
  background: var(--surface-white);
  color: var(--text-heading);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(10, 102, 194, 0.1);
}

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

/* Tags */
.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  font-family: var(--font-label);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-radius: var(--radius-full);
  background: var(--github-canvas);
  color: var(--text-body);
}

.tag-primary {
  background: rgba(10, 102, 194, 0.1);
  color: var(--primary-blue);
}

.tag-success {
  background: rgba(46, 160, 67, 0.1);
  color: var(--accent-green);
}

.tag-purple {
  background: rgba(130, 80, 223, 0.1);
  color: var(--accent-purple);
}

/* Toast */
.toast {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  background: var(--github-dark);
  color: white;
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  transform: translateY(100px);
  opacity: 0;
  transition: all var(--transition-base);
  z-index: 9999;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast.success {
  border-left: 4px solid var(--accent-green);
}

.toast.error {
  border-left: 4px solid var(--error);
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-md); }
.mt-2 { margin-top: var(--space-xl); }
.mt-3 { margin-top: var(--space-2xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-md); }
.mb-2 { margin-bottom: var(--space-xl); }
.mb-3 { margin-bottom: var(--space-2xl); }

.hidden { display: none; }
.visible { display: block; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-text .subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta {
    justify-content: center;
  }

  .hero-visual {
    order: -1;
    max-width: 400px;
    margin: 0 auto;
  }

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

  .timeline {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2xl);
  }

  .timeline::before {
    display: none;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--surface-white);
    flex-direction: column;
    padding: var(--space-xl);
    gap: var(--space-lg);
    border-bottom: 1px solid var(--github-border);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-base);
  }

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

  .mobile-menu-toggle {
    display: flex;
  }

  .hero {
    padding-top: calc(72px + var(--space-2xl));
  }

  .timeline {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-social {
    justify-content: center;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-cta {
    flex-direction: column;
  }

  .btn-lg {
    width: 100%;
  }
}