/* /assets/css/styles.css */
/* 
 * Nile Anderson Personal Website
 * River-inspired design with deep blues, teals, and gold accents
 */

/* ==================== CSS RESET & BASE ==================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Light Theme - River Colors */
  --color-primary: #0A4D68;      /* Deep ocean blue */
  --color-secondary: #088395;     /* Teal */
  --color-accent: #D4AF37;        /* Gold */
  --color-accent-hover: #B8941F;  
  --color-bg: #F8FAFB;           /* Soft white-blue */
  --color-surface: #FFFFFF;
  --color-text: #1A2332;
  --color-text-muted: #4A5568;
  --color-border: #E2E8F0;
  
  /* Dark Theme - Deep Waters */
  --color-primary-dark: #5DADE2;
  --color-secondary-dark: #48C9B0;
  --color-accent-dark: #F4D03F;
  --color-accent-hover-dark: #F7DC6F;
  --color-bg-dark: #0F1419;
  --color-surface-dark: #1A212C;
  --color-text-dark: #E8EEF3;
  --color-text-muted-dark: #94A3B8;
  --color-border-dark: #2D3748;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2.5rem;
  --spacing-xl: 4rem;
  --spacing-2xl: 6rem;
  
  /* Typography */
  --font-display: 'Cormorant Garamond', 'Georgia', serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* 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);
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
}

[data-theme="dark"] {
  --color-primary: var(--color-primary-dark);
  --color-secondary: var(--color-secondary-dark);
  --color-accent: var(--color-accent-dark);
  --color-accent-hover: var(--color-accent-hover-dark);
  --color-bg: var(--color-bg-dark);
  --color-surface: var(--color-surface-dark);
  --color-text: var(--color-text-dark);
  --color-text-muted: var(--color-text-muted-dark);
  --color-border: var(--color-border-dark);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 2rem;
}

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color var(--transition-base), color var(--transition-base);
}

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

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
}

h4 {
  font-size: 1.5rem;
}

p {
  margin-bottom: var(--spacing-md);
  max-width: 70ch;
}

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

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

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

/* ==================== SKIP TO CONTENT ==================== */
.skip-to-content {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-weight: 600;
  z-index: 10000;
  transition: top var(--transition-fast);
}

.skip-to-content:focus {
  top: var(--spacing-sm);
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

/* ==================== HEADER & NAVIGATION ==================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(248, 250, 251, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

[data-theme="dark"] .site-header {
  background: rgba(15, 20, 25, 0.8);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
  transition: color var(--transition-fast);
}

.logo:hover {
  color: var(--color-accent);
}

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

.theme-toggle {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-xl);
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.theme-toggle:hover {
  border-color: var(--color-accent);
  transform: rotate(15deg);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

.theme-toggle svg {
  width: 1.25rem;
  height: 1.25rem;
  fill: var(--color-text);
  transition: transform var(--transition-base);
}

.theme-toggle .sun-icon {
  display: none;
}

[data-theme="dark"] .theme-toggle .moon-icon {
  display: none;
}

[data-theme="dark"] .theme-toggle .sun-icon {
  display: block;
}

/* ==================== CONTAINERS & LAYOUT ==================== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-2xl) 0;
  position: relative;
}

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

.section-title {
  position: relative;
  display: inline-block;
  padding-bottom: var(--spacing-sm);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 4rem;
  height: 4px;
  background: linear-gradient(90deg, var(--color-secondary), var(--color-accent));
  border-radius: var(--radius-xl);
}

/* ==================== HERO SECTION ==================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-bg) 0%, rgba(8, 131, 149, 0.05) 100%);
  padding-top: 5rem;
}

[data-theme="dark"] .hero {
  background: linear-gradient(135deg, var(--color-bg) 0%, rgba(8, 131, 149, 0.1) 100%);
}

.hero-content {
  text-align: center;
  z-index: 10;
  max-width: 900px;
  padding: var(--spacing-lg);
}

.hero-greeting {
  font-family: var(--font-body);
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-text-muted);
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
  opacity: 0;
  animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.2s forwards;
}

.hero-name {
  margin-bottom: var(--spacing-md);
  opacity: 0;
  animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.4s forwards;
}

.hero-tagline {
  font-family: var(--font-body);
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  color: var(--color-text-muted);
  font-weight: 400;
  margin-bottom: var(--spacing-md);
  opacity: 0;
  animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.6s forwards;
}

.hero-description {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-text-muted);
  margin: 0 auto var(--spacing-xl);
  max-width: 650px;
  line-height: 1.6;
  opacity: 0;
  animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.8s forwards;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 1s forwards;
}

/* Wave Animation Background */
.wave-container {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  overflow: hidden;
  line-height: 0;
  z-index: 1;
}

.wave-container svg {
  position: relative;
  display: block;
  width: calc(100% + 1.3px);
  height: 150px;
}

.wave-container .wave-path-1 {
  fill: rgba(8, 131, 149, 0.1);
  animation: wave 12s cubic-bezier(0.36, 0.45, 0.63, 0.53) infinite;
}

.wave-container .wave-path-2 {
  fill: rgba(10, 77, 104, 0.1);
  animation: wave 18s cubic-bezier(0.36, 0.45, 0.63, 0.53) -0.125s infinite;
}

@keyframes wave {
  0%, 100% {
    transform: translateX(0%);
  }
  50% {
    transform: translateX(-25%);
  }
}

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

/* Floating Gear Decoration */
.hero-decoration {
  position: absolute;
  opacity: 0.03;
  pointer-events: none;
  z-index: 0;
}

.gear-1 {
  top: 10%;
  right: 5%;
  width: 120px;
  height: 120px;
  animation: rotate-slow 30s linear infinite;
}

.gear-2 {
  bottom: 20%;
  left: 5%;
  width: 90px;
  height: 90px;
  animation: rotate-slow 25s linear infinite reverse;
}

@keyframes rotate-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ==================== BUTTONS ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 0.875rem 2rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-xl);
  border: 2px solid;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn:hover::before {
  opacity: 1;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

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

.btn-primary:hover {
  background: var(--color-secondary);
  border-color: var(--color-secondary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary);
}

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

/* ==================== ABOUT SECTION ==================== */
.about {
  background: var(--color-surface);
  transition: background-color var(--transition-base);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  max-width: 800px;
  margin: 0 auto;
}

.about-text p {
  color: var(--color-text);
  line-height: 1.8;
}

.about-text p:last-child {
  margin-bottom: 0;
}

/* ==================== FAITH SECTION ==================== */
.faith {
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.05), transparent);
}

.faith-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.faith-statement {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: var(--spacing-lg);
}

.faith-verse {
  background: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  margin: var(--spacing-lg) 0;
  box-shadow: var(--shadow-md);
}

.verse-text {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-style: italic;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

.verse-reference {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  font-weight: 600;
}

.faith-closing {
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ==================== ACADEMICS SECTION ==================== */
.academics {
  background: var(--color-surface);
}

.academics-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

/* Education Timeline */
.education-timeline {
  position: relative;
}

.timeline-item {
  position: relative;
  padding-left: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
  border-left: 2px solid var(--color-border);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.timeline-item.visible {
  opacity: 1;
  transform: translateY(0);
}

.timeline-item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -8px;
  top: 0;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-bg);
  box-shadow: 0 0 0 4px var(--color-accent);
  transition: all var(--transition-base);
}

.timeline-item:hover::before {
  transform: scale(1.3);
}

.timeline-content {
  background: var(--color-bg);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.timeline-content:hover {
  box-shadow: var(--shadow-lg);
  transform: translateX(4px);
}

.timeline-degree {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
}

.timeline-institution {
  font-size: 1.0625rem;
  color: var(--color-text);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.timeline-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
}

.timeline-meta span {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.timeline-grade {
  display: inline-block;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-xl);
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: var(--spacing-sm);
}

.timeline-highlights {
  list-style: none;
}

.timeline-highlights li {
  position: relative;
  padding-left: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.timeline-highlights li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-secondary);
  font-weight: bold;
}

.timeline-highlights li:last-child {
  margin-bottom: 0;
}

/* Skills Section */
.skills-section {
  margin-top: var(--spacing-2xl);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.skill-category {
  background: var(--color-bg);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.skill-category:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.skill-category-title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.skill-tag {
  background: var(--color-surface);
  color: var(--color-text);
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-xl);
  font-size: 0.875rem;
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.skill-tag:hover {
  background: var(--color-secondary);
  color: white;
  border-color: var(--color-secondary);
}

/* Download CV Button */
.download-cv {
  text-align: center;
  margin-top: var(--spacing-xl);
}

/* ==================== PROJECTS SECTION ==================== */
.projects {
  background: linear-gradient(135deg, var(--color-bg), rgba(8, 131, 149, 0.03));
}

.project-filters {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
}

.filter-btn {
  padding: 0.625rem 1.25rem;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-xl);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn:focus-visible {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
}

.filter-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

.project-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  opacity: 0;
  transform: translateY(20px);
}

.project-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.project-card:hover {
  border-color: var(--color-secondary);
  box-shadow: var(--shadow-xl);
  transform: translateY(-8px);
}

.project-header {
  margin-bottom: var(--spacing-md);
}

.project-year {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.project-title {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.project-description {
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.project-tag {
  background: linear-gradient(135deg, rgba(8, 131, 149, 0.1), rgba(10, 77, 104, 0.1));
  color: var(--color-secondary);
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-md);
  font-size: 0.8125rem;
  font-weight: 500;
  border: 1px solid rgba(8, 131, 149, 0.2);
}

/* ==================== CONTACT SECTION ==================== */
.contact {
  background: var(--color-surface);
}

.contact-content {
  max-width: 600px;
  margin: 0 auto;
}

.contact-intro {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  color: var(--color-text-muted);
}

.contact-form {
  background: var(--color-bg);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group label {
  display: block;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-xs);
  font-size: 0.9375rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(8, 131, 149, 0.1);
}

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

.form-error {
  color: #E53E3E;
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
  display: none;
}

.form-group.error input,
.form-group.error textarea {
  border-color: #E53E3E;
}

.form-group.error .form-error {
  display: block;
}

.form-actions {
  display: flex;
  justify-content: center;
}

.form-status {
  text-align: center;
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  font-weight: 600;
  display: none;
}

.form-status.success {
  background: #C6F6D5;
  color: #22543D;
  display: block;
}

.form-status.error {
  background: #FED7D7;
  color: #742A2A;
  display: block;
}

/* ==================== FOOTER ==================== */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-xl) 0 var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  text-align: center;
}

.footer-social {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
  transform: translateY(-4px);
}

.social-link svg {
  width: 1.25rem;
  height: 1.25rem;
  fill: currentColor;
}

.footer-info {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

.footer-copyright {
  margin-bottom: var(--spacing-xs);
}

.footer-credits {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ==================== RESPONSIVE DESIGN ==================== */
@media (min-width: 768px) {
  .academics-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

@media (max-width: 640px) {
  :root {
    --spacing-lg: 1.5rem;
    --spacing-xl: 2.5rem;
    --spacing-2xl: 4rem;
  }
  
  .hero {
    min-height: 90vh;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .timeline-item {
    padding-left: var(--spacing-lg);
  }
  
  .contact-form {
    padding: var(--spacing-lg);
  }
}

/* ==================== ACCESSIBILITY ==================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Focus visible styles */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

/* ==================== PRINT STYLES ==================== */
@media print {
  .site-header,
  .theme-toggle,
  .hero-cta,
  .project-filters,
  .contact-form,
  .site-footer {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
}