/* 
 * Modern Portfolio - Vikas N Murthy
 * A clean, elegant design with distinctive aesthetics
 */

/* ========================================
   CSS Variables & Root
======================================== */
:root {
  /* Color Palette - Warm & Sophisticated */
  --color-bg: #0f0f0f;
  --color-bg-alt: #1a1a1a;
  --color-bg-card: #151515;
  --color-text: #f5f5f5;
  --color-text-muted: #a0a0a0;
  --color-accent: #e07a5f;
  --color-accent-light: #f2a58d;
  --color-accent-dark: #c45d43;
  --color-secondary: #81b29a;
  --color-border: rgba(255, 255, 255, 0.08);

  /* Typography */
  --font-sans: "Outfit", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: "Playfair Display", Georgia, serif;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 5rem;
  --space-3xl: 8rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Borders */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 9999px;
}

/* ========================================
   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-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

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

ul,
ol {
  list-style: none;
}

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

/* ========================================
   Typography
======================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 8vw, 5rem);
}
h2 {
  font-size: clamp(2rem, 5vw, 3rem);
}
h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
}
h4 {
  font-size: clamp(1rem, 2vw, 1.25rem);
}

p {
  max-width: 65ch;
}

strong {
  font-weight: 600;
  color: var(--color-text);
}

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

.section {
  padding: var(--space-3xl) 0;
}

/* ========================================
   Navigation
======================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-md) 0;
  transition: all var(--transition-base);
}

.nav.scrolled {
  background: rgba(15, 15, 15, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-sm) 0;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.05em;
}

.nav-menu {
  display: flex;
  gap: var(--space-lg);
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  position: relative;
  padding: var(--space-xs) 0;
}

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

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

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

/* Mobile Navigation Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  padding: var(--space-xs);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: all var(--transition-base);
  transform-origin: center;
}

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

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

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

/* ========================================
   Hero Section
======================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(
      ellipse at 20% 80%,
      rgba(224, 122, 95, 0.08) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse at 80% 20%,
      rgba(129, 178, 154, 0.06) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse at 50% 50%,
      rgba(15, 15, 15, 1) 0%,
      var(--color-bg) 100%
    );
  z-index: -1;
}

.hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.02'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.hero-content {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  padding-top: var(--space-3xl);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.hero-text {
  animation: fadeInUp 0.8s ease-out;
}

.hero-greeting {
  font-size: 1rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.hero-name {
  margin-bottom: var(--space-md);
}

.hero-first,
.hero-last {
  display: block;
}

.hero-first {
  color: var(--color-text-muted);
  font-weight: 400;
}

.hero-last {
  color: var(--color-text);
  font-weight: 600;
}

.hero-title {
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  font-family: var(--font-sans);
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
  max-width: 450px;
}

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

/* Hero Image */
.hero-visual {
  display: flex;
  justify-content: center;
  animation: fadeIn 1s ease-out 0.3s both;
}

.hero-image-wrapper {
  position: relative;
  width: 320px;
  height: 320px;
  overflow: visible;
}

html,
body {
  overflow-x: clip;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
  filter: grayscale(20%);
  transition: filter var(--transition-base);
}

.hero-image:hover {
  filter: grayscale(0%);
}

.hero-image-decoration {
  position: absolute;
  inset: -15px;
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-lg);
  opacity: 0.3;
  transform: rotate(3deg);
  z-index: -1;
}

/* Hero Scroll Indicator */
.hero-scroll {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  animation: fadeIn 1s ease-out 1s both;
}

.hero-scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--color-accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* ========================================
   Buttons
======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: 0.875rem 1.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  cursor: pointer;
}

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

.btn-primary:hover {
  background: var(--color-accent-light);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(224, 122, 95, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

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

/* ========================================
   Section Headers
======================================== */
.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
  opacity: 0;
  transform: translateY(30px);
  transition: all var(--transition-slow);
}

.section-header.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
  position: relative;
  padding: 0 var(--space-lg);
}

.section-label::before,
.section-label::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 30px;
  height: 1px;
  background: var(--color-accent);
  opacity: 0.5;
}

.section-label::before {
  left: 0;
}

.section-label::after {
  right: 0;
}

.section-title {
  color: var(--color-text);
}

/* ========================================
   About Section
======================================== */
.about {
  background: var(--color-bg-alt);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
}

.about-text {
  opacity: 0;
  transform: translateX(-30px);
  transition: all var(--transition-slow);
}

.about-text.animate-in {
  opacity: 1;
  transform: translateX(0);
}

.about-intro {
  font-size: 1.25rem;
  line-height: 1.8;
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

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

.about-highlights {
  display: flex;
  gap: var(--space-xl);
  margin-top: var(--space-xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.highlight {
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition-slow);
}

.highlight.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.highlight-number {
  display: block;
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--color-accent);
  line-height: 1;
}

.highlight-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Skills */
.about-skills {
  opacity: 0;
  transform: translateX(30px);
  transition: all var(--transition-slow);
}

.about-skills.animate-in {
  opacity: 1;
  transform: translateX(0);
}

.about-skills h3 {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

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

.skill-card {
  background: var(--color-bg-card);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  opacity: 0;
  transform: translateY(20px);
}

.skill-card.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.skill-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-5px);
}

.skill-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(224, 122, 95, 0.1);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-md);
  color: var(--color-accent);
}

.skill-card h4 {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.skill-card p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ========================================
   Experience Section
======================================== */
.experience {
  background: var(--color-bg);
}

/* Timeline */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto var(--space-2xl);
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(
    to bottom,
    var(--color-accent),
    var(--color-secondary)
  );
  opacity: 0.3;
}

.timeline-item {
  position: relative;
  padding-left: var(--space-2xl);
  padding-bottom: var(--space-2xl);
  opacity: 0;
  transform: translateX(-20px);
  transition: all var(--transition-slow);
}

.timeline-item.animate-in {
  opacity: 1;
  transform: translateX(0);
}

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

.timeline-marker {
  position: absolute;
  left: -6px;
  top: 5px;
  width: 14px;
  height: 14px;
  background: var(--color-bg);
  border: 3px solid var(--color-accent);
  border-radius: 50%;
  transition: all var(--transition-base);
}

.timeline-item:hover .timeline-marker {
  background: var(--color-accent);
  box-shadow: 0 0 20px rgba(224, 122, 95, 0.5);
}

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

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

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

.timeline-date {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.timeline-title {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.timeline-company {
  font-size: 1rem;
  color: var(--color-secondary);
}

.timeline-description {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.timeline-achievements {
  margin-bottom: var(--space-md);
  padding-left: var(--space-md);
}

.timeline-achievements li {
  position: relative;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
  padding-left: var(--space-sm);
  list-style: none;
}

.timeline-achievements li::before {
  content: "→";
  position: absolute;
  left: calc(-1 * var(--space-md));
  color: var(--color-secondary);
  font-weight: 600;
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
}

/* Education */
.education {
  max-width: 800px;
  margin: 0 auto;
}

.education-heading {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
  text-align: center;
}

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

.education-card {
  background: var(--color-bg-card);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  text-align: center;
  transition: all var(--transition-base);
  opacity: 0;
  transform: translateY(20px);
}

.education-card.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.education-card:hover {
  border-color: var(--color-secondary);
  transform: translateY(-5px);
}

.education-icon {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
}

.education-card h4 {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.education-school {
  color: var(--color-secondary);
  font-weight: 500;
  margin-bottom: var(--space-xs);
}

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

.education-courses {
  font-size: 0.8125rem;
  color: var(--color-secondary);
  margin-top: var(--space-xs);
  font-style: italic;
}

/* ========================================
   Projects Section
======================================== */
.projects {
  background: var(--color-bg-alt);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.project-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  opacity: 0;
  transform: translateY(30px);
}

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

.project-card:hover {
  transform: translateY(-10px);
  border-color: var(--color-accent);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.project-image {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
  filter: grayscale(30%);
}

.project-card:hover .project-image img {
  transform: scale(1.1);
  filter: grayscale(0%);
}

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

.project-category {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.project-title {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.project-description {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-accent);
  transition: all var(--transition-fast);
}

.project-link:hover {
  color: var(--color-accent-light);
  gap: var(--space-sm);
}

.project-link svg {
  transition: transform var(--transition-fast);
}

.project-link:hover svg {
  transform: translate(3px, -3px);
}

/* ========================================
   Contact Section
======================================== */
.contact {
  background: var(--color-bg);
  text-align: center;
}

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

.contact-intro {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
}

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

.contact-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-lg);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  min-width: 150px;
  transition: all var(--transition-base);
  opacity: 0;
  transform: translateY(20px);
}

.contact-link.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.contact-link:hover {
  border-color: var(--color-accent);
  transform: translateY(-5px);
}

.contact-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(224, 122, 95, 0.1);
  border-radius: 50%;
  color: var(--color-accent);
}

.contact-link span {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.contact-link:hover span {
  color: var(--color-text);
}

.contact-location {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.contact-location svg {
  color: var(--color-secondary);
}

/* ========================================
   Footer
======================================== */
.footer {
  background: var(--color-bg-alt);
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
}

.footer-content {
  text-align: center;
}

.footer-content p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0 auto;
}

/* ========================================
   Animations
======================================== */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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

@keyframes scrollPulse {
  0%,
  100% {
    opacity: 0.3;
    transform: scaleY(0.5);
    transform-origin: top;
  }
  50% {
    opacity: 1;
    transform: scaleY(1);
  }
}

/* Staggered animations for lists */
.timeline-item:nth-child(1) {
  transition-delay: 0.1s;
}
.timeline-item:nth-child(2) {
  transition-delay: 0.2s;
}
.timeline-item:nth-child(3) {
  transition-delay: 0.3s;
}

.skill-card:nth-child(1) {
  transition-delay: 0.1s;
}
.skill-card:nth-child(2) {
  transition-delay: 0.15s;
}
.skill-card:nth-child(3) {
  transition-delay: 0.2s;
}
.skill-card:nth-child(4) {
  transition-delay: 0.25s;
}

.project-card:nth-child(1) {
  transition-delay: 0.1s;
}
.project-card:nth-child(2) {
  transition-delay: 0.15s;
}
.project-card:nth-child(3) {
  transition-delay: 0.2s;
}
.project-card:nth-child(4) {
  transition-delay: 0.25s;
}
.project-card:nth-child(5) {
  transition-delay: 0.3s;
}
.project-card:nth-child(6) {
  transition-delay: 0.35s;
}

.education-card:nth-child(1) {
  transition-delay: 0.1s;
}
.education-card:nth-child(2) {
  transition-delay: 0.2s;
}

.contact-link:nth-child(1) {
  transition-delay: 0.1s;
}
.contact-link:nth-child(2) {
  transition-delay: 0.15s;
}
.contact-link:nth-child(3) {
  transition-delay: 0.2s;
}

.highlight:nth-child(1) {
  transition-delay: 0.1s;
}
.highlight:nth-child(2) {
  transition-delay: 0.2s;
}
.highlight:nth-child(3) {
  transition-delay: 0.3s;
}

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

  .hero-visual {
    order: -1;
  }

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

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

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

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

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
    position: relative;
    z-index: 1002;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 15, 15, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-lg);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all var(--transition-base);
    z-index: 1001;
  }

  .nav-menu.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .nav-link {
    font-size: 1.5rem;
  }

  .hero-image-wrapper {
    width: 250px;
    height: 250px;
  }

  .about-highlights {
    flex-direction: column;
    gap: var(--space-lg);
    align-items: flex-start;
  }

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

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

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

  .contact-links {
    flex-direction: column;
    align-items: center;
  }

  .contact-link {
    width: 100%;
    max-width: 300px;
  }
}

@media (max-width: 480px) {
  :root {
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 5rem;
  }

  .hero-cta {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
  }

  .timeline::before {
    left: -1px;
  }

  .timeline-item {
    padding-left: var(--space-lg);
  }

  .timeline-marker {
    left: -7px;
    width: 12px;
    height: 12px;
  }
}

/* ========================================
   Selection & Scrollbar
======================================== */
::selection {
  background: var(--color-accent);
  color: var(--color-bg);
}

::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--color-accent);
  border-radius: 0;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-accent-light);
}

::-webkit-scrollbar-corner {
  background: var(--color-bg);
}

/* ========================================
   Focus States (Accessibility)
======================================== */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* ========================================
   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;
  }
}