:root {
  --bg-color: #0c0c0c;
  --surface-color: #1a1a1a;
  --surface-hover: #222222;
  --text-primary: #e0e0e0;
  --text-secondary: #808080;
  --accent-color: #00ff88;
  --accent-dim: #00aa55;
  --accent-glow: rgba(0, 255, 136, 0.15);
  --font-main: 'Roboto Mono', monospace;
  --transition: all 0.3s ease;
  --container-width: 900px;
  --border-radius: 2px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-color);
  background-image:
    radial-gradient(circle at 20% 50%, rgba(0, 255, 136, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(0, 255, 255, 0.02) 0%, transparent 50%);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  font-weight: 400;
}

/* Skip to content link for accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--accent-color);
  color: var(--bg-color);
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  font-weight: 600;
  z-index: 1000;
  border-radius: 0 0 var(--border-radius) 0;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* Matrix Canvas Background */
#matrix-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  opacity: 0.08;
}

/* Scan Lines Effect - More Subtle */
.scan-lines {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
  background: repeating-linear-gradient(0deg,
      rgba(0, 0, 0, 0.05),
      rgba(0, 0, 0, 0.05) 1px,
      transparent 1px,
      transparent 3px);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: rgba(12, 12, 12, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--surface-hover);
  transition: var(--transition);
}

.navbar.scrolled {
  padding: 0.75rem 2rem;
  background: rgba(12, 12, 12, 0.95);
}

.nav-brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-color);
  text-shadow: 0 0 10px var(--accent-color);
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-color);
  transition: width 0.3s ease;
}

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

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

/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 101;
}

.hamburger-line {
  width: 24px;
  height: 2px;
  background: var(--accent-color);
  transition: all 0.3s ease;
  box-shadow: 0 0 5px var(--accent-color);
}

.hamburger.active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.hamburger.active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

p,
li {
  text-align: justify;
}

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

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

/* Enhanced keyboard focus indicators */
a:focus,
button:focus,
.social-btn:focus,
.nav-links a:focus,
.skill-tag:focus,
.contact-btn:focus,
.resume-download-btn:focus,
.project-link:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px var(--accent-glow);
}

/* Focus visible for modern browsers */
a:focus-visible,
button:focus-visible,
.social-btn:focus-visible,
.nav-links a:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px var(--accent-glow);
}

/* Remove default outline but keep for keyboard navigation */
a:focus:not(:focus-visible),
button:focus:not(:focus-visible) {
  outline: none;
  box-shadow: none;
}

ul {
  list-style: none;
}

/* Layout */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 2.5rem;
  position: relative;
  z-index: 1;
}

section {
  padding: 4rem 0;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* Header */
header {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 2rem 0;
}

header h1 {
  font-size: clamp(3rem, 7vw, 4.5rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
  position: relative;
  display: inline-block;
  animation: glitch-text 5s infinite;
}

header h1::before {
  content: '> ';
  color: var(--accent-color);
  text-shadow: 0 0 10px var(--accent-color);
}

header h1::after {
  content: '';
  display: inline-block;
  width: 0.15em;
  height: 1em;
  background-color: var(--accent-color);
  margin-left: 0.1em;
  vertical-align: text-bottom;
  animation: blink 1.2s step-end infinite;
  box-shadow: 0 0 10px var(--accent-color);
}

@keyframes blink {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0;
  }
}

/* Glitch Animation */
@keyframes glitch-text {

  0%,
  90%,
  100% {
    text-shadow: none;
  }

  91% {
    text-shadow: 2px 0 var(--accent-color), -2px 0 #ff00ff;
  }

  92% {
    text-shadow: -2px 0 var(--accent-color), 2px 0 #00ffff;
  }

  93% {
    text-shadow: none;
  }
}

header .subtitle {
  font-size: clamp(1.1rem, 2.5vw, 1.3rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 0.5rem;
  font-weight: 400;
  text-align: center;
  line-height: 1.5;
}

.greeting {
  font-size: 1.15rem;
  color: var(--accent-color);
  margin-bottom: 0.75rem;
  font-weight: 400;
}

.tagline {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 550px;
  margin: 0 auto 1.75rem;
  line-height: 1.7;
}

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  animation: fadeInUp 1s ease 2s both;
}

.scroll-arrow {
  font-size: 1.2rem;
  animation: bounce 2s infinite;
  color: var(--accent-color);
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-8px);
  }
  60% {
    transform: translateY(-4px);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

.btn-icon {
  font-weight: 700;
  margin-right: 0.25rem;
}

.social-links {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.25rem;
  flex-wrap: wrap;
  justify-content: center;
}

.social-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: transparent;
  border: 1px solid var(--surface-hover);
  border-radius: var(--border-radius);
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
}

.social-btn:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
  background: rgba(0, 255, 136, 0.05);
}

/* Resume Download Button */
.resume-download-wrapper {
  margin-top: 2rem;
  display: flex;
  justify-content: center;
}

.resume-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2.5rem;
  background: linear-gradient(135deg, rgba(0, 255, 136, 0.1) 0%, rgba(0, 255, 136, 0.05) 100%);
  border: 2px solid var(--accent-color);
  border-radius: var(--border-radius);
  color: var(--accent-color);
  font-size: 1.05rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  box-shadow: 0 0 20px rgba(0, 255, 136, 0.2);
}

.resume-download-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--accent-color);
  transition: left 0.4s ease;
  z-index: -1;
}

.resume-download-btn:hover {
  color: var(--bg-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 30px rgba(0, 255, 136, 0.4);
}

.resume-download-btn:hover::before {
  left: 0;
}

.resume-download-btn:active {
  transform: translateY(0);
}

.download-icon {
  font-size: 1.3rem;
  font-weight: 700;
  animation: bounce-download 2s infinite;
}

@keyframes bounce-download {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-4px);
  }
  60% {
    transform: translateY(-2px);
  }
}

.file-type {
  font-size: 0.7rem;
  padding: 0.2rem 0.5rem;
  background: rgba(0, 0, 0, 0.3);
  border-radius: var(--border-radius);
  margin-left: 0.25rem;
}

/* Section Headings */
h2 {
  font-size: 1.6rem;
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-primary);
  font-weight: 600;
  letter-spacing: -0.01em;
  position: relative;
  padding-bottom: 0.75rem;
}

h2::before {
  content: '#';
  color: var(--accent-color);
  font-weight: 700;
  text-shadow: 0 0 8px var(--accent-color);
  font-size: 1.8rem;
}

h2::after {
  content: '';
  height: 1px;
  background: linear-gradient(90deg, var(--accent-color) 0%, var(--surface-hover) 50%, transparent 100%);
  flex: 1;
  box-shadow: 0 0 5px var(--accent-glow);
}

/* Experience Cards */
.experience-card {
  background: transparent;
  border-left: 1px solid var(--surface-hover);
  padding: 1.25rem 1.25rem 1.25rem 1.75rem;
  margin-bottom: 1.5rem;
  transition: var(--transition);
  position: relative;
}

.experience-card::before {
  content: '';
  position: absolute;
  left: -1px;
  top: 0;
  width: 1px;
  height: 0;
  background: var(--accent-color);
  transition: height 0.4s ease;
}

.experience-card:hover::before {
  height: 100%;
}

.experience-card:hover {
  border-left-color: var(--accent-color);
  animation: glitch-card 0.3s ease;
  background: linear-gradient(90deg, rgba(0, 255, 136, 0.03) 0%, transparent 100%);
  box-shadow: -4px 0 20px rgba(0, 255, 136, 0.15);
}

@keyframes glitch-card {

  0%,
  100% {
    transform: translateX(0);
  }

  25% {
    transform: translateX(-2px);
  }

  50% {
    transform: translateX(2px);
  }

  75% {
    transform: translateX(-1px);
  }
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.role {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.company {
  color: var(--accent-color);
  font-weight: 400;
  font-size: 1.05rem;
}

.date {
  font-family: var(--font-main);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
}

.experience-list {
  list-style-type: none;
  margin-top: 1rem;
}

.experience-list li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.65rem;
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.6;
}

.experience-list li::before {
  content: '·';
  position: absolute;
  left: 0;
  color: var(--accent-dim);
  font-weight: 700;
}

/* Education */
.education-item {
  margin-bottom: 2rem;
}

.degree {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
}

.thesis,
.courses {
  color: var(--text-secondary);
  margin-top: 0.5rem;
  font-size: 0.95rem;
  font-style: normal;
}

/* Skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.skill-category h3 {
  color: var(--accent-color);
  margin-bottom: 1rem;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.skill-tag {
  background: transparent;
  padding: 0.5rem 1.1rem;
  border-radius: var(--border-radius);
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: var(--transition);
  border: 1px solid var(--surface-hover);
  font-weight: 500;
}

.skill-tag:hover {
  color: var(--accent-color);
  border-color: var(--accent-color);
  background: rgba(0, 255, 136, 0.05);
  box-shadow: 0 0 15px rgba(0, 255, 136, 0.3);
  transform: translateY(-2px);
}

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

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.project-card {
  background: transparent;
  border: 1px solid var(--surface-hover);
  padding: 1.75rem;
  border-radius: var(--border-radius);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-color), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.project-card:hover::before {
  transform: scaleX(1);
}

.project-card:hover {
  border-color: var(--accent-color);
  background: linear-gradient(135deg, rgba(0, 255, 136, 0.03) 0%, transparent 100%);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 255, 136, 0.1);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
}

.project-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  flex: 1;
  min-width: 200px;
}

.project-links {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--surface-hover);
  border-radius: var(--border-radius);
  transition: var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.project-link:hover {
  color: var(--accent-color);
  border-color: var(--accent-color);
  background: rgba(0, 255, 136, 0.05);
}

.project-link span {
  font-size: 1rem;
}

.project-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0;
  flex-grow: 1;
}

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: auto;
  padding-top: 0.5rem;
  border-top: 1px solid var(--surface-hover);
}

.tech-tag {
  background: rgba(0, 255, 136, 0.08);
  color: var(--accent-color);
  padding: 0.35rem 0.75rem;
  border-radius: var(--border-radius);
  font-size: 0.75rem;
  font-weight: 500;
  border: 1px solid rgba(0, 255, 136, 0.2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: var(--transition);
}

.tech-tag:hover {
  background: rgba(0, 255, 136, 0.15);
  border-color: var(--accent-color);
  box-shadow: 0 0 8px rgba(0, 255, 136, 0.2);
}

/* Footer */
footer {
  text-align: center;
  padding: 3rem 0 2rem;
  color: var(--text-secondary);
  font-size: 0.85rem;
  border-top: 1px solid var(--surface-hover);
  margin-top: 2rem;
}

footer .footer-note {
  font-size: 0.75rem;
  margin-top: 0.5rem;
  opacity: 0.7;
}

/* Contact Section */
#contact {
  text-align: center;
  padding: 5rem 0;
}

.contact-content {
  max-width: 550px;
  margin: 0 auto;
}

.contact-content p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  text-align: center;
  font-size: 1.1rem;
}

.contact-btn {
  display: inline-block;
  padding: 1.1rem 2.75rem;
  background: transparent;
  border: 2px solid var(--accent-color);
  color: var(--accent-color);
  font-size: 1.05rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.contact-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--accent-color);
  transition: left 0.3s ease;
  z-index: -1;
}

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

.contact-btn:hover::before {
  left: 0;
}

/* Text Glitch Effect */
@keyframes text-glitch {
  0% {
    transform: translate(0);
    text-shadow: none;
  }
  20% {
    transform: translate(-2px, 2px);
    text-shadow: 2px -2px var(--accent-color), -2px 2px #ff00ff;
  }
  40% {
    transform: translate(-2px, -2px);
    text-shadow: -2px 2px var(--accent-color), 2px -2px #00ffff;
  }
  60% {
    transform: translate(2px, 2px);
    text-shadow: 2px 2px var(--accent-color), -2px -2px #ff00ff;
  }
  80% {
    transform: translate(2px, -2px);
    text-shadow: -2px -2px #00ffff, 2px 2px var(--accent-color);
  }
  100% {
    transform: translate(0);
    text-shadow: none;
  }
}

.glitch-active .role,
.glitch-active .company,
.glitch-active h3,
.glitch-active.skill-tag,
.glitch-active.social-btn {
  animation: text-glitch 0.3s ease;
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */

/* Mobile Navigation Overlay */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 75%;
    max-width: 300px;
    height: 100vh;
    background: rgba(12, 12, 12, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    padding: 2rem;
    transition: right 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    border-left: 1px solid var(--accent-color);
    box-shadow: -5px 0 20px rgba(0, 255, 136, 0.1);
    z-index: 100;
  }

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

  .nav-links a {
    font-size: 1.1rem;
    width: 100%;
    text-align: center;
    padding: 1rem;
    border-bottom: 1px solid var(--surface-hover);
  }

  .nav-links a::after {
    bottom: 0;
  }
}

/* Small phones (320px - 480px) */
@media (max-width: 480px) {
  :root {
    --container-width: 100%;
  }

  .container {
    padding: 0 1rem;
  }

  header h1 {
    font-size: 2rem;
  }

  header .subtitle {
    font-size: 0.9rem;
  }

  .tagline {
    font-size: 0.95rem;
  }

  .social-links {
    flex-direction: column;
    width: 100%;
  }

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

  .resume-download-btn {
    width: 100%;
    justify-content: center;
    padding: 1rem 1.5rem;
    font-size: 0.95rem;
  }

  h2 {
    font-size: 1.4rem;
  }

  section {
    padding: 2.5rem 0;
  }

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

  .projects-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .project-header {
    flex-direction: column;
    gap: 0.75rem;
  }

  .project-title {
    font-size: 1.15rem;
  }

  .nav-brand {
    font-size: 1.25rem;
  }
}

/* Medium phones (481px - 768px) */
@media (min-width: 481px) and (max-width: 768px) {
  .container {
    padding: 0 1.5rem;
  }

  header h1 {
    font-size: 2.5rem;
  }

  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .projects-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  section {
    padding: 3rem 0;
  }
}

/* Tablets (769px - 1024px) */
@media (min-width: 769px) and (max-width: 1024px) {
  .container {
    max-width: 750px;
  }

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

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

/* Common mobile styles (max-width: 768px) */
@media (max-width: 768px) {
  .navbar {
    padding: 1rem 1.5rem;
  }

  .navbar.scrolled {
    padding: 0.75rem 1.5rem;
  }

  .card-header {
    flex-direction: column;
    gap: 0.25rem;
  }

  .scroll-indicator {
    display: none;
  }

  /* Ensure touch targets are at least 44px */
  .nav-links a,
  .social-btn,
  .skill-tag,
  .contact-btn,
  .resume-download-btn,
  .project-link {
    min-height: 44px;
    min-width: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
}

/* Landscape mobile devices */
@media (max-height: 600px) and (orientation: landscape) {
  header {
    min-height: auto;
    padding: 6rem 0 3rem;
  }

  .scroll-indicator {
    display: none;
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  #matrix-canvas {
    display: none;
  }

  .scan-lines {
    display: none;
  }

  .download-icon {
    animation: none;
  }
}