/* ═══════════════════════════════════════════
   CSS CUSTOM PROPERTIES — edit these to theme
   ═══════════════════════════════════════════ */
:root {
  /* Dark theme (default) */
  --bg-primary: #0a0f1c;
  --bg-secondary: #111827;
  --bg-card: #1a2236;
  --bg-card-hover: #1f2a42;
  --bg-nav: rgba(10, 15, 28, 0.85);

  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-heading: #f1f5f9;

  --accent: #38bdf8;
  --accent-hover: #7dd3fc;
  --accent-dim: rgba(56, 189, 248, 0.1);

  --border: #1e293b;
  --border-accent: rgba(56, 189, 248, 0.3);

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

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', monospace;

  /* Layout */
  --max-width: 1100px;
  --nav-height: 64px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

/* Light theme overrides — warm, low-contrast palette */
[data-theme="light"] {
  --bg-primary: #faf8f5;
  --bg-secondary: #f3f0eb;
  --bg-card: #ffffff;
  --bg-card-hover: #f5f2ed;
  --bg-nav: rgba(250, 248, 245, 0.88);

  --text-primary: #4a4542;
  --text-secondary: #7a7570;
  --text-heading: #2d2926;

  --accent: #2a7b9b;
  --accent-hover: #1e6280;
  --accent-dim: rgba(42, 123, 155, 0.08);

  --border: #e5e0da;
  --border-accent: rgba(42, 123, 155, 0.25);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  /* Smooth theme transition so dark↔light doesn't flashbang */
  transition: background-color 500ms ease, color 500ms ease;
}

/* Propagate the smooth transition to major themed surfaces */
.navbar,
.about,
.experience,
.education,
.skill-category,
.project-card,
.project-description,
.timeline-content,
.about-photo-placeholder,
.education-card,
.coursework-item,
.footer {
  transition: background-color 500ms ease, color 500ms ease, border-color 500ms ease;
}

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

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

ul {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

::selection {
  background: var(--accent);
  color: var(--bg-primary);
}

/* ═══════════════════════════════════════════
   LAYOUT
   ═══════════════════════════════════════════ */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section {
  padding: var(--space-2xl) 0;
}

/* ═══════════════════════════════════════════
   SECTION HEADINGS
   ═══════════════════════════════════════════ */
.section-heading {
  font-size: clamp(1.5rem, 4vw, 1.75rem);
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: var(--space-xl);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  white-space: nowrap;
}

.section-heading::after {
  content: '';
  display: block;
  width: 100%;
  max-width: 300px;
  height: 1px;
  background: var(--border);
}

.heading-number {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
  color: var(--accent);
}

/* ═══════════════════════════════════════════
   NAVIGATION
   ═══════════════════════════════════════════ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--bg-nav);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.navbar.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-heading);
  letter-spacing: -0.5px;
  transition: color var(--transition-fast);
}

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

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

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

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
  position: relative;
  padding: var(--space-xs) 0;
  transition: color var(--transition-fast);
}

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

.nav-link:hover,
.nav-link.active {
  color: var(--accent);
}

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

/* Hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  z-index: 1001;
}

.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-base);
}

.hamburger {
  position: relative;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
}

.hamburger::before { top: -7px; }
.hamburger::after { top: 7px; }

.nav-toggle.active .hamburger {
  background: transparent;
}

.nav-toggle.active .hamburger::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle.active .hamburger::after {
  top: 0;
  transform: rotate(-45deg);
}

/* Theme toggle */
.theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.theme-toggle:hover {
  border-color: var(--accent);
}

.theme-icon {
  font-size: 0.85rem;
  transition: opacity var(--transition-fast);
}

[data-theme="dark"] .theme-icon.sun { opacity: 0.3; }
[data-theme="dark"] .theme-icon.moon { opacity: 1; }
[data-theme="light"] .theme-icon.sun { opacity: 1; }
[data-theme="light"] .theme-icon.moon { opacity: 0.3; }

/* ═══════════════════════════════════════════
   HERO
   ═══════════════════════════════════════════ */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  padding-top: calc(var(--nav-height) + var(--space-xl));
  padding-bottom: var(--space-xl);
  position: relative;
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: var(--text-secondary);
  opacity: 0.6;
  transition: opacity var(--transition-base);
}

.scroll-indicator:hover {
  opacity: 1;
}

.scroll-text {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.scroll-chevron {
  animation: bounce 2s ease infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(6px);
  }
  60% {
    transform: translateY(3px);
  }
}

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

.hero-greeting {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--accent);
  margin-bottom: var(--space-sm);
}

.hero-name {
  font-size: clamp(2.5rem, 7vw, 4rem);
  font-weight: 800;
  color: var(--text-heading);
  line-height: 1.1;
  margin-bottom: var(--space-sm);
}

.hero-title {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--text-secondary);
  line-height: 1.2;
  margin-bottom: var(--space-lg);
}

.hero-description {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: var(--space-lg);
}

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

/* Terminal widget */
.terminal-window {
  background: #0d1117;
  border: 1px solid #30363d;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.35);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  background: #161b22;
  border-bottom: 1px solid #30363d;
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.terminal-dot.red { background: #ff5f57; }
.terminal-dot.yellow { background: #febc2e; }
.terminal-dot.green { background: #28c840; }

.terminal-title {
  margin-left: auto;
  margin-right: auto;
  font-size: 0.75rem;
  color: #8b949e;
}

.terminal-body {
  padding: 16px 20px;
  line-height: 1.9;
  color: #c9d1d9;
}

.terminal-body .prompt { color: #28c840; }
.terminal-body .cmd { color: #79c0ff; }
.terminal-body .output { color: #8b949e; padding-left: 1.5rem; }

.cursor-blink {
  animation: blink 1s step-end infinite;
  color: #28c840;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* ═══════════════════════════════════════════
   BUTTONS
   ═══════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: 6px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: var(--bg-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(56, 189, 248, 0.3);
}

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

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

.btn-large {
  padding: 16px 40px;
  font-size: 0.95rem;
}

/* ═══════════════════════════════════════════
   ABOUT
   ═══════════════════════════════════════════ */
.about {
  background: var(--bg-secondary);
}

.about-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: var(--space-xl);
  align-items: start;
}

.about-text p {
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
}

.about-tech-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xs) var(--space-lg);
  margin-top: var(--space-md);
}

.about-tech-list li {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  position: relative;
  padding-left: 20px;
}

.about-tech-list li::before {
  content: '▹';
  color: var(--accent);
  position: absolute;
  left: 0;
  font-size: 0.9rem;
}

.about-photo-wrapper {
  position: relative;
}

.about-photo-wrapper::after {
  content: '';
  position: absolute;
  top: 14px;
  left: 14px;
  width: 100%;
  height: 100%;
  border: 2px solid var(--accent);
  border-radius: 8px;
  z-index: 0;
  transition: all var(--transition-base);
}

.about-photo-wrapper:hover::after {
  top: 8px;
  left: 8px;
}

.about-photo-placeholder {
  position: relative;
  z-index: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  transition: all var(--transition-base);
}

.photo-icon {
  font-size: 3rem;
  opacity: 0.5;
}

.about-photo {
  position: relative;
  z-index: 1;
  width: 100%;
  border-radius: 8px;
  border: 1px solid var(--border);
  display: block;
  filter: grayscale(20%);
  transition: filter var(--transition-base);
}

.about-photo-wrapper:hover .about-photo {
  filter: grayscale(0%);
}

.photo-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  opacity: 0.6;
}

/* ═══════════════════════════════════════════
   SKILLS
   ═══════════════════════════════════════════ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-lg);
}

.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: var(--space-lg);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.skill-category::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.skill-category:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.skill-category:hover::before {
  transform: scaleX(1);
}

.skill-category-icon {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
}

.skill-category h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: var(--space-md);
}

.skill-category li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 4px 0;
  padding-left: 16px;
  position: relative;
}

.skill-category li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* ═══════════════════════════════════════════
   PROJECTS — Featured
   ═══════════════════════════════════════════ */
.project-featured {
  margin-bottom: var(--space-2xl);
}

.project-overline {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: var(--space-xs);
}

.project-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: var(--space-md);
  transition: color var(--transition-fast);
}

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

.project-description {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: var(--space-lg);
  margin-bottom: var(--space-md);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.project-description p {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.project-tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-md);
  margin-bottom: var(--space-md);
}

.project-tech-list li {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.project-links {
  display: flex;
  gap: var(--space-md);
}

.project-link {
  color: var(--text-secondary);
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.project-link:hover {
  color: var(--accent);
  transform: translateY(-2px);
}

/* Other projects grid */
.projects-other-heading {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-heading);
  text-align: center;
  margin-bottom: var(--space-lg);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
}

.project-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-6px);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.15);
}

.project-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-md);
}

.project-card-icon {
  font-size: 1.75rem;
}

.project-card-links a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.project-card-links a:hover {
  color: var(--accent);
}

.project-card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: var(--space-sm);
  transition: color var(--transition-fast);
}

.project-card:hover .project-card-title {
  color: var(--accent);
}

.project-card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  flex-grow: 1;
  margin-bottom: var(--space-md);
}

.project-card-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.project-card-tech li {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* ═══════════════════════════════════════════
   EDUCATION
   ═══════════════════════════════════════════ */
.education-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.education-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: var(--space-lg);
  position: relative;
  transition: all var(--transition-base);
  overflow: hidden;
}

.education-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--border);
  transition: background var(--transition-base);
}

.education-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.education-card:hover::before {
  background: var(--accent);
}

.education-card-primary {
  border-color: var(--border-accent);
}

.education-card-primary::before {
  background: var(--accent);
}

.education-card-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: var(--space-md);
  border: 1px solid var(--border-accent);
}

.education-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: var(--space-xs);
}

.education-school-sub {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.education-degree {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: var(--space-xs);
}

.education-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Coursework */
.coursework-section {
  margin-top: var(--space-lg);
}

.coursework-heading {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--border);
}

.coursework-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-sm) var(--space-lg);
}

.coursework-item {
  display: flex;
  align-items: baseline;
  gap: var(--space-md);
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  transition: border-color var(--transition-fast);
}

.coursework-item:hover {
  border-color: var(--border-accent);
}

.coursework-code {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
  min-width: 65px;
}

.coursework-name {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ═══════════════════════════════════════════
   EDUCATION
   ═══════════════════════════════════════════ */
.education {
  background: var(--bg-secondary);
}

/* ═══════════════════════════════════════════
   EXPERIENCE — Timeline
   ═══════════════════════════════════════════ */
.experience {
  background: var(--bg-primary);
}

.timeline {
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--space-xl);
}

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

.timeline-marker {
  position: absolute;
  left: -40px;
  top: 6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 3px solid var(--accent);
  z-index: 1;
  transition: background var(--transition-fast);
}

.timeline-item:hover .timeline-marker {
  background: var(--accent);
}

.timeline-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: var(--space-lg);
  transition: border-color var(--transition-base);
}

.timeline-item:hover .timeline-content {
  border-color: var(--border-accent);
}

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

.timeline-header h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-heading);
}

.timeline-company {
  color: var(--accent);
  font-weight: 500;
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.timeline-details li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 4px 0;
  padding-left: 20px;
  position: relative;
}

.timeline-details li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* ═══════════════════════════════════════════
   CONTACT
   ═══════════════════════════════════════════ */
.contact {
  text-align: center;
}

.contact-content {
  max-width: 560px;
  margin: 0 auto;
}

.contact-text {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

.contact-socials {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.social-link {
  color: var(--text-secondary);
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.social-link:hover {
  color: var(--accent);
  transform: translateY(-3px);
}

/* ═══════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════ */
.footer {
  padding: var(--space-lg) 0;
  text-align: center;
  border-top: 1px solid var(--border);
}

.footer p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.footer strong {
  color: var(--accent);
  font-weight: 500;
}

.footer-sub {
  font-size: 0.75rem;
  margin-top: var(--space-xs);
  opacity: 0.7;
}

/* ═══════════════════════════════════════════
   SCROLL REVEAL ANIMATIONS
   ═══════════════════════════════════════════ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ═══════════════════════════════════════════
   RESPONSIVE — Mobile First Adjustments
   ═══════════════════════════════════════════ */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    max-width: 300px;
    height: 100vh;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border);
    flex-direction: column;
    justify-content: center;
    gap: var(--space-lg);
    padding: var(--space-xl);
    transition: right var(--transition-slow);
  }

  .nav-links.open {
    right: 0;
  }

  .nav-link {
    font-size: 1rem;
  }

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

  .hero-description {
    margin-left: auto;
    margin-right: auto;
  }

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

  .hero-visual {
    display: none;
  }

  .scroll-indicator {
    display: none;
  }

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

  .about-photo-wrapper {
    max-width: 280px;
    margin: 0 auto;
  }

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

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

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

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

  .section {
    padding: var(--space-xl) 0;
  }

  .section-heading::after {
    max-width: 120px;
  }
}

@media (max-width: 480px) {
  .skills-grid {
    grid-template-columns: 1fr;
  }

  .hero-name {
    font-size: 2rem;
  }

  .hero-title {
    font-size: 1.25rem;
  }

  .about-tech-list {
    grid-template-columns: 1fr;
  }

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

/* Mobile nav overlay */
.nav-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 999;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.nav-overlay.active {
  display: block;
  opacity: 1;
}