/* ============================================
   DESIGN TOKENS
   ============================================ */

:root {
  /* Colors */
  --color-bg: #FAFAFA;
  --color-bg-alt: #F4F4F5;
  --color-bg-dark: #09090B;
  --color-text: #09090B;
  --color-text-secondary: #3F3F46;
  --color-text-muted: #71717A;
  --color-accent: #2563EB;
  --color-accent-hover: #1D4ED8;
  --color-border: #E4E4E7;
  --color-border-light: #F4F4F5;
  --color-white: #FFFFFF;

  /* Typography */
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.25rem;
  --space-xl: 1.75rem;
  --space-2xl: 2.25rem;
  --space-3xl: 3rem;
  --space-4xl: 4.5rem;
  --space-5xl: 6rem;

  /* Sizing */
  --container-max: 1200px;
  --nav-height: 72px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 150ms;
  --duration-base: 250ms;
  --duration-slow: 500ms;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.1);

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
}

/* ============================================
   RESET & BASE
   ============================================ */

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* ============================================
   LAYOUT
   ============================================ */

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

.section {
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--color-border);
}

.section.experience,
.section.projects,
.section.ai-solutions {
  background-color: #F7F7F8;
}

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

.section-label {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.2;
}

.section-subtitle {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  max-width: 540px;
  margin: var(--space-md) auto 0;
  line-height: 1.7;
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.8125rem 1.75rem;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--duration-base) var(--ease-out);
  cursor: pointer;
  letter-spacing: 0.01em;
}

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

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  border: 1.5px solid var(--color-border);
  color: var(--color-text);
  background-color: transparent;
}

.btn-outline:hover {
  border-color: var(--color-text);
  transform: translateY(-1px);
}

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

/* ============================================
   NAVBAR
   ============================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  padding: 0 var(--space-lg);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: background-color var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out),
              backdrop-filter var(--duration-base) var(--ease-out);
}

.navbar.scrolled {
  background-color: rgba(250, 250, 250, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--color-border);
}

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

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

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

.nav-links a {
  font-size: 0.875rem;
  font-weight: 450;
  color: var(--color-text-secondary);
  transition: color var(--duration-fast) var(--ease-out);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background-color: var(--color-accent);
  transition: width var(--duration-base) var(--ease-out);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-text);
}

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

.nav-cta {
  padding: 0.5rem 1.125rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out) !important;
}

.nav-cta::after {
  display: none !important;
}

.nav-cta:hover {
  border-color: var(--color-accent) !important;
  color: var(--color-accent) !important;
}

/* Mobile Nav Toggle */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.hamburger {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-text);
  position: relative;
  transition: background-color var(--duration-fast);
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background-color: var(--color-text);
  transition: transform var(--duration-base) var(--ease-out);
}

.hamburger::before { top: -6px; }
.hamburger::after { top: 6px; }

.nav-toggle[aria-expanded="true"] .hamburger {
  background-color: transparent;
}

.nav-toggle[aria-expanded="true"] .hamburger::before {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .hamburger::after {
  transform: translateY(-6px) rotate(-45deg);
}

/* ============================================
   HERO
   ============================================ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background-color: var(--color-bg);
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(37, 99, 235, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 99, 235, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 70%);
}

.hero-content {
  position: relative;
  text-align: center;
  padding: var(--space-xl);
  max-width: 720px;
}

.hero-greeting {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
  letter-spacing: 0.02em;
}

.hero-name {
  font-family: var(--font-heading);
  font-size: clamp(2.75rem, 7vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  letter-spacing: -0.02em;
}

.hero-title {
  font-family: var(--font-body);
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-xl);
}

.hero-tagline {
  font-size: clamp(1rem, 2vw, 1.125rem);
  color: var(--color-text-secondary);
  line-height: 1.75;
  max-width: 560px;
  margin: 0 auto var(--space-2xl);
}

.hero-inline-link {
  color: inherit;
  text-decoration: none;
  font-style: italic;
  font-weight: inherit;
}

.hero-inline-link:hover {
  text-decoration: none;
}

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

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  opacity: 0.5;
  transition: opacity var(--duration-base);
}

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

.scroll-arrow {
  width: 24px;
  height: 24px;
  border-right: 2px solid var(--color-text-muted);
  border-bottom: 2px solid var(--color-text-muted);
  transform: rotate(45deg);
  animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: rotate(45deg) translate(0, 0); opacity: 0.5; }
  50% { transform: rotate(45deg) translate(4px, 4px); opacity: 1; }
}

/* ============================================
   ABOUT
   ============================================ */

.about {
  background-color: var(--color-white);
}

.about-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-2xl);
  align-items: start;
  margin-bottom: var(--space-xl);
}

.photo-placeholder {
  width: 280px;
  height: 340px;
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  color: var(--color-text-muted);
  border: 1px dashed var(--color-border);
}

.photo-placeholder span {
  font-size: 0.8125rem;
  font-weight: 500;
}

.about-text p {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}

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

.about-intro {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-xl);
}

.about-pillars {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.about-pillar-item {
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
}

.about-pillar-item:last-child {
  border-bottom: none;
}

.about-pillar {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-accent);
  cursor: pointer;
  list-style: none;
  padding: 6px 0;
  border: none;
  background: none;
  letter-spacing: 0.02em;
}

.about-pillar::-webkit-details-marker { display: none; }

.about-pillar::after {
  content: '▾';
  font-size: 0.75rem;
  transition: transform 0.2s;
}

.about-pillar-item[open] .about-pillar::after {
  transform: rotate(-180deg);
}

.about-pillar-list {
  list-style: disc;
  padding-left: 1.25rem;
  margin: var(--space-sm) 0 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.about-pillar-list li {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--color-border);
}

.stat {
  text-align: center;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1;
}

.stat-suffix {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}

.stat-label {
  display: block;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
  font-weight: 500;
}

/* ============================================
   EXPERIENCE TIMELINE
   ============================================ */

.experience {
  background-color: var(--color-bg);
}

.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background-color: var(--color-border);
}

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

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

.timeline-marker {
  position: absolute;
  left: -40px;
  top: 8px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background-color: var(--color-bg);
  border: 2px solid var(--color-accent);
  z-index: 1;
}

.timeline-item:first-child .timeline-marker {
  background-color: var(--color-accent);
}

.timeline-date {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.02em;
}

.timeline-role {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 600;
  margin-top: var(--space-xs);
  color: var(--color-text);
}

.timeline-company {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-top: var(--space-xs);
}

.timeline-desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
  line-height: 1.7;
}

/* More Experience dropdown */
.more-experience {
  max-width: 800px;
  margin: var(--space-lg) auto 0;
}

.more-experience-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  cursor: pointer;
  list-style: none;
  padding: 6px 0;
  border: none;
  background: none;
  letter-spacing: 0.02em;
}

.more-experience-toggle::-webkit-details-marker { display: none; }

.more-experience-toggle::after {
  content: '▾';
  font-size: 0.75rem;
  transition: transform 0.2s;
}

.more-experience[open] .more-experience-toggle::after {
  transform: rotate(-180deg);
}

.more-experience-timeline {
  margin-top: var(--space-lg);
}

.more-experience-timeline .timeline-item {
  padding-bottom: var(--space-sm);
}

.more-experience-timeline .timeline-item:last-child {
  padding-bottom: 0;
}

/* ============================================
   PROJECTS
   ============================================ */

.projects {
  background-color: var(--color-white);
}

/* Carousel */
.carousel {
  position: relative;
  max-width: 600px;
  margin: 0 auto;
  overflow: hidden;
}

.carousel-track {
  display: flex;
  transition: transform 0.5s var(--ease-out);
}

.carousel-slide {
  min-width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-bg);
}

a.carousel-slide.project-link {
  display: block;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  transition: box-shadow var(--duration-base) var(--ease-out);
}

a.carousel-slide.project-link:hover {
  box-shadow: var(--shadow-lg);
}

a.carousel-slide.project-link .project-name {
  transition: color var(--duration-fast) var(--ease-out);
}

a.carousel-slide.project-link:hover .project-name {
  color: var(--color-accent);
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  z-index: 2;
  box-shadow: var(--shadow-sm);
}

.carousel-btn:hover {
  background-color: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.carousel-btn-prev { left: -60px; }
.carousel-btn-next { right: -60px; }

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

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-border);
  border: none;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  padding: 0;
}

.carousel-dot.active {
  background-color: var(--color-accent);
  transform: scale(1.2);
}

.project-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-bg);
  transition: transform var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out);
  cursor: pointer;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.project-image {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--color-bg-alt);
}

.project-image-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  opacity: 0.4;
}

.project-image-real {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out);
}

.carousel-slide:hover .project-image-real {
  transform: scale(1.05);
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(9, 9, 11, 0.9) 0%, rgba(9, 9, 11, 0.4) 50%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-lg);
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-out);
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-category-tag {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  background-color: rgba(37, 99, 235, 0.15);
  padding: 0.25rem 0.625rem;
  border-radius: 100px;
  margin-bottom: var(--space-sm);
  width: fit-content;
}

.project-overlay-desc {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.6;
}

.project-info {
  padding: var(--space-lg) var(--space-xl);
}

.project-desc {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-top: var(--space-md);
}

.project-name {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
}

.project-type {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

.project-card.hidden {
  display: none;
}

/* ============================================
   COMPETENCIES
   ============================================ */

.competencies {
  background-color: var(--color-bg);
}

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

.competency-card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  border: 1px solid var(--color-border);
}

.competency-heading {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-xl);
}

.skill-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.skill-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: var(--space-sm);
}

.skill-name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.skill-level {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.skill-bar {
  height: 4px;
  background-color: var(--color-bg-alt);
  border-radius: 100px;
  overflow: hidden;
}

.skill-fill {
  height: 100%;
  width: 0;
  background-color: var(--color-accent);
  border-radius: 100px;
  transition: width 1s var(--ease-out);
}

.skill-fill.animated {
  /* width set by JS via data-width */
}

.tag-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.tag {
  display: inline-block;
  padding: 0.4375rem 0.875rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background-color: var(--color-bg-alt);
  border-radius: 100px;
  border: 1px solid var(--color-border);
  transition: all var(--duration-fast) var(--ease-out);
}

.tag:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background-color: rgba(37, 99, 235, 0.04);
}

/* ============================================
   RESUME
   ============================================ */

.resume {
  background-color: var(--color-white);
}

.resume-top-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.resume-bottom-row {
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  margin-bottom: var(--space-lg);
}

.resume-col-heading {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.resume-entry-line {
  border-left: 2px solid var(--color-border);
  padding-left: var(--space-md);
  margin-bottom: var(--space-md);
  transition: border-color var(--duration-fast) var(--ease-out);
}

.resume-entry-line:last-child {
  margin-bottom: 0;
}

.resume-entry-line:hover {
  border-left-color: var(--color-accent);
}

.resume-entry-line h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.4;
}

.resume-institution {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-top: var(--space-xs);
}

.resume-year {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-top: var(--space-xs);
}

.resume-detail {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
  line-height: 1.6;
}

.resume-grad-date {
  font-size: 0.8125rem;
  font-weight: 400;
  color: var(--color-text-muted);
}

.resume-badge {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 100px;
  margin-bottom: var(--space-xs);
}

.resume-badge-blue {
  background-color: rgba(37, 99, 235, 0.08);
  color: var(--color-accent);
}

.resume-badge-amber {
  background-color: rgba(234, 179, 8, 0.1);
  color: #B45309;
}

.resume-activities-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.tech-groups {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.tech-group {
  border-left: 2px solid var(--color-border);
  padding-left: var(--space-md);
  transition: border-color var(--duration-fast) var(--ease-out);
}

.tech-group:hover {
  border-left-color: var(--color-accent);
}

.tech-group-heading {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

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

.tech-tag {
  display: inline-block;
  padding: 5px 14px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 100px;
}

.resume-download {
  text-align: center;
}

@media (max-width: 480px) {
  .resume-top-row {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
  .resume-activities-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   CONTACT
   ============================================ */

.contact {
  background-color: var(--color-bg);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  max-width: 900px;
  margin: 0 auto;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.form-group label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  color: var(--color-text);
  transition: border-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
  outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  padding-top: var(--space-lg);
}

.contact-detail h3 {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.contact-detail a {
  color: var(--color-accent);
  font-weight: 500;
  transition: color var(--duration-fast);
}

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

.contact-detail p {
  color: var(--color-text-secondary);
}

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

.social-link {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  transition: all var(--duration-fast) var(--ease-out);
  cursor: pointer;
}

.social-link:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background-color: rgba(37, 99, 235, 0.04);
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer p {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* ============================================
   SCROLL REVEAL ANIMATIONS
   ============================================ */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

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

/* Stagger children */
.reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal:nth-child(3) { transition-delay: 0.2s; }
.reveal:nth-child(4) { transition-delay: 0.3s; }
.reveal:nth-child(5) { transition-delay: 0.4s; }
.reveal:nth-child(6) { transition-delay: 0.5s; }

/* ============================================
   FOCUS STATES (Accessibility)
   ============================================ */

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

a:focus:not(:focus-visible),
button:focus:not(:focus-visible) {
  outline: none;
}

/* ============================================
   REDUCED MOTION
   ============================================ */

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

  html { scroll-behavior: auto; }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .skill-fill {
    transition: none;
  }
}

/* ============================================
   RESPONSIVE — TABLET
   ============================================ */

@media (max-width: 1024px) {
  .carousel-btn-prev { left: 8px; }
  .carousel-btn-next { right: 8px; }

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

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

/* ============================================
   RESPONSIVE — MOBILE
   ============================================ */

@media (max-width: 768px) {
  .section {
    padding: var(--space-3xl) 0;
  }

  /* Mobile Nav */
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: var(--color-white);
    flex-direction: column;
    padding: calc(var(--nav-height) + var(--space-xl)) var(--space-xl) var(--space-xl);
    gap: var(--space-lg);
    box-shadow: var(--shadow-lg);
    transition: right var(--duration-slow) var(--ease-out);
    z-index: 40;
  }

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

  .nav-links a {
    font-size: 1rem;
  }

  .nav-cta {
    text-align: center;
  }

  /* About */
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .photo-placeholder {
    width: 100%;
    height: 280px;
  }

  .stats-row {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
  }

  .stat-number, .stat-suffix {
    font-size: 2rem;
  }

  /* Timeline */
  .timeline {
    padding-left: 32px;
  }

  .timeline-marker {
    left: -32px;
    width: 13px;
    height: 13px;
  }

  /* Carousel mobile */
  .carousel-btn {
    width: 40px;
    height: 40px;
  }

  .carousel-btn-prev { left: 4px; }
  .carousel-btn-next { right: 4px; }

  /* Contact */
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  /* Hero */
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .hero-actions .btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }
}

@media (max-width: 375px) {
  .container {
    padding: 0 var(--space-md);
  }

  .stats-row {
    grid-template-columns: 1fr 1fr;
  }
}