:root {
  --bg: #0a0a0f;
  --bg-secondary: #12121a;
  --text: #e4e4ed;
  --text-muted: #8888a0;
  --accent: #6c5ce7;
  --accent-glow: rgba(108, 92, 231, 0.3);
  --border: rgba(255, 255, 255, 0.06);
  --card-bg: rgba(255, 255, 255, 0.03);
  --card-hover: rgba(255, 255, 255, 0.06);
  --highlight: #a29bfe;
  --green: #00e676;
  --red: #ff5252;
  --yellow: #ffd740;
  --terminal-bg: rgba(10, 10, 15, 0.85);
  --radius: 16px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  --bg: #f8f8fc;
  --bg-secondary: #ffffff;
  --text: #1a1a2e;
  --text-muted: #6b6b80;
  --accent: #5b4ae0;
  --accent-glow: rgba(91, 74, 224, 0.15);
  --border: rgba(0, 0, 0, 0.08);
  --card-bg: rgba(0, 0, 0, 0.02);
  --card-hover: rgba(0, 0, 0, 0.04);
  --highlight: #6c5ce7;
  --green: #00c853;
  --red: #e53935;
  --yellow: #f9a825;
  --terminal-bg: rgba(30, 30, 46, 0.9);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

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

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

/* ---- Background glows ---- */

.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.4;
  pointer-events: none;
  z-index: 0;
  transition: opacity 1s ease;
}

.bg-glow-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow), transparent 70%);
  top: -200px;
  right: -200px;
}

.bg-glow-2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 230, 118, 0.12), transparent 70%);
  bottom: 10%;
  left: -150px;
}

.bg-glow-3 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 215, 64, 0.08), transparent 70%);
  top: 45%;
  left: 50%;
  transform: translate(-50%, -50%);
}

/* ---- Navigation ---- */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border var(--transition);
}

.nav.scrolled {
  background: var(--bg-secondary);
  border-bottom-color: var(--border);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: "JetBrains Mono", monospace;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 2px;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition);
  position: relative;
}

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

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

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

/* Theme toggle */

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: border-color var(--transition), transform var(--transition);
}

.theme-toggle:hover {
  transform: scale(1.1);
  border-color: var(--accent);
}

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

/* ---- Hero ---- */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 100px 24px 40px;
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 1200px;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-greeting {
  font-family: "JetBrains Mono", monospace;
  font-size: 1rem;
  color: var(--accent);
  margin-bottom: 8px;
}

.hero-name {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.05;
  margin-bottom: 16px;
}

.hero-name-line {
  display: block;
  background: linear-gradient(135deg, var(--text) 0%, var(--highlight) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-role {
  font-family: "JetBrains Mono", monospace;
  font-size: 1.1rem;
  color: var(--accent);
  margin-bottom: 20px;
}

.hero-tagline {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 480px;
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 24px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--accent-glow);
}

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

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

/* Hero terminal */

.hero-terminal {
  background: var(--terminal-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.4);
  transform: perspective(800px) rotateY(-3deg) rotateX(2deg);
  transition: transform 0.4s ease;
}

.hero-terminal:hover {
  transform: perspective(800px) rotateY(0deg) rotateX(0deg);
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(0, 0, 0, 0.3);
  border-bottom: 1px solid var(--border);
}

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

.dot-red {
  background: var(--red);
}

.dot-yellow {
  background: var(--yellow);
}

.dot-green {
  background: var(--green);
}

.terminal-title {
  margin-left: 12px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.terminal-body {
  padding: 20px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.85rem;
  line-height: 1.8;
}

.terminal-body p {
  color: var(--text-muted);
}

.prompt {
  color: var(--green);
}

.terminal-output {
  color: var(--text) !important;
  margin-bottom: 4px;
  margin-left: 20px;
}

.cursor {
  color: var(--accent);
  animation: blink 1s step-end infinite;
}

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

.terminal-input {
  outline: none;
  min-width: 20px;
  display: inline-block;
  caret-color: var(--accent);
  color: var(--text);
}

.terminal-body {
  max-height: 340px;
  overflow-y: auto;
}

/* Snake overlay */

.snake-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: #0a0a0f;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.3s ease;
}

.snake-close {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 1001;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 1.2rem;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.snake-close:hover {
  color: var(--text);
  border-color: var(--accent);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Scroll indicator */

.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0.5;
  animation: fadeInUp 1s ease 1s both;
}

.scroll-text {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--text-muted);
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%,
  100% {
    opacity: 0.3;
    transform: scaleY(1);
  }
  50% {
    opacity: 1;
    transform: scaleY(1.3);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
  }
  to {
    opacity: 0.5;
    transform: translateX(-50%) translateY(0);
  }
}

/* ---- Sections ---- */

.section-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 48px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.section-number {
  font-family: "JetBrains Mono", monospace;
  font-size: 1.25rem;
  color: var(--accent);
  font-weight: 500;
}

/* ---- About ---- */

.about {
  padding: 100px 0;
  position: relative;
  z-index: 1;
}

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: start;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 16px;
  font-size: 1.05rem;
}

.about-text .highlight {
  color: var(--highlight);
  font-weight: 500;
}

.about-stats {
  display: flex;
  gap: 40px;
  margin-top: 32px;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--highlight));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 4px;
}

.about-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: background var(--transition), border var(--transition);
}

.tech-stack h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text);
}

.tech-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tech-item {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.75rem;
  padding: 6px 14px;
  border-radius: 50px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: all var(--transition);
}

.tech-item:hover {
  border-color: var(--accent);
  color: var(--text);
  background: var(--card-hover);
}

/* ---- Interests ---- */

.interests {
  padding: 100px 0;
  position: relative;
  z-index: 1;
  background: var(--card-bg);
}

.interests-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.interest-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: all var(--transition);
  cursor: default;
}

.interest-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
  background: var(--card-hover);
}

.interest-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.interest-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.interest-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ---- Experience & Certifications ---- */

.experience {
  padding: 100px 0;
  position: relative;
  z-index: 1;
}

.exp-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.exp-subtitle {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent);
  margin-bottom: 24px;
  font-family: "JetBrains Mono", monospace;
}

.exp-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
  transition: all var(--transition);
}

.exp-card:hover {
  border-color: var(--accent);
  background: var(--card-hover);
  transform: translateY(-2px);
}

.exp-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 8px;
}

.exp-card-role {
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text);
}

.exp-card-company {
  color: var(--accent);
  font-weight: 500;
  font-size: 0.9rem;
}

.exp-card-period {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.exp-card-location {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.exp-card-highlights {
  list-style: none;
  padding: 0;
}

.exp-card-highlights li {
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 4px 0;
  padding-left: 16px;
  position: relative;
}

.exp-card-highlights li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--accent);
}

.cert-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all var(--transition);
}

.cert-card:hover {
  border-color: var(--accent);
  background: var(--card-hover);
  transform: translateY(-2px);
}

.cert-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.cert-name {
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--text);
}

.cert-issuer {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: "JetBrains Mono", monospace;
}

.about-card-section h3 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.edu-line {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.edu-institution {
  font-weight: 600;
  color: var(--text);
}

@media (max-width: 900px) {
  .exp-grid {
    grid-template-columns: 1fr;
  }
}

/* ---- Contact ---- */

.contact {
  padding: 100px 0 0;
  position: relative;
  z-index: 1;
}

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

.contact-content p {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 32px;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

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

.contact-link-icon {
  font-size: 1.2rem;
}

/* ---- Footer ---- */

.footer {
  margin-top: 80px;
  padding: 32px 24px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ---- Reveal animation ---- */

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ---- Responsive ---- */

@media (max-width: 900px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-visual {
    order: -1;
  }

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

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

  .about-stats {
    justify-content: flex-start;
  }

  .hero-terminal {
    transform: none;
  }
}

@media (max-width: 600px) {
  .interests-grid {
    grid-template-columns: 1fr;
  }

  .nav-links {
    gap: 16px;
  }

  .nav-links a {
    font-size: 0.8rem;
  }

  .hero-name {
    font-size: 2.2rem;
  }

  .hero-actions {
    flex-direction: column;
  }

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