:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #1c2128;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --accent: #58a6ff;
  --accent-dim: #1f6feb33;
  --border: #30363d;
  --green: #3fb950;
  --orange: #d29922;
  --purple: #bc8cff;
  --font-sans: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --font-heading: 'Space Grotesk', sans-serif;
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

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

/* Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: all 0.3s ease;
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: -0.5px;
}

.nav-logo span {
  color: var(--text-muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
  position: relative;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.3s ease;
}

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

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 100px 0;
}

/* Section headers */
.section-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.section-label::before {
  content: '//';
  color: var(--text-muted);
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  letter-spacing: -0.5px;
}

.section-line {
  width: 60px;
  height: 2px;
  background: var(--accent);
  margin-bottom: 3rem;
  border-radius: 1px;
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 72px;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(88,166,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(88,166,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 30%, transparent 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 4rem;
  width: 100%;
}

.hero-text {
  width: 450px;
  flex: 1;
}

.hero-greeting {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.hero-name {
  font-family: var(--font-heading);
  font-size: 4rem;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 0.5rem;
  letter-spacing: -1.5px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-role {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.hero-typed-wrap {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  height: 3em;
}

.typed-cursor {
  color: var(--accent);
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  text-decoration: none;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg-primary);
  font-weight: 500;
}

.btn-primary:hover {
  background: #79c0ff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(88,166,255,0.2);
}

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

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

/* Hero Image */
.hero-image {
  flex-shrink: 0;
  position: relative;
}

.hero-image-frame {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--border);
  position: relative;
  background: var(--bg-secondary);
}

.hero-image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(60%) contrast(1.1) brightness(0.8);
  transition: filter 0.5s ease;
  opacity: 0.8;
}

.hero-image-frame:hover img {
  filter: grayscale(20%) contrast(1) brightness(0.95);
  opacity: 1;
}

.hero-image-frame::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(88,166,255,0.15), transparent 60%);
  pointer-events: none;
}

.hero-image-ring {
  position: absolute;
  top: -12px;
  left: -12px;
  right: -12px;
  bottom: -12px;
  border: 1px solid var(--border);
  border-radius: 50%;
  animation: spin 30s linear infinite;
}

.hero-image-ring::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  font-size: 1.05rem;
}

.about-text p strong {
  color: var(--accent);
  font-weight: 500;
}

.about-details {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2rem;
}

.about-details h3 {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.about-detail-row {
  display: flex;
  justify-content: space-between;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

.about-detail-row:last-child {
  border-bottom: none;
}

.about-detail-label {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.about-detail-value {
  color: var(--text-primary);
  font-weight: 500;
}

/* Tech Stack */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 1rem;
  margin-bottom: 3rem;
}

.stack-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  text-align: center;
  transition: all 0.3s ease;
  cursor: default;
}

.stack-item:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(88,166,255,0.08);
}

.stack-item i {
  font-size: 2rem;
  margin-bottom: 0.75rem;
  color: var(--accent);
  display: block;
}

.stack-item span {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.stack-categories {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.stack-category {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
}

.stack-category-title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.stack-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.stack-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.35rem 0.75rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-secondary);
  transition: all 0.2s;
}

.stack-tag:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Experience */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  padding-bottom: 3rem;
  padding-left: 2rem;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.5s ease;
}

.timeline-item.visible {
  opacity: 1;
  transform: translateY(0);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 6px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: var(--bg-primary);
  z-index: 1;
}

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

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.timeline-company {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.timeline-role {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.timeline-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}

.timeline-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.timeline-stack span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.2rem 0.5rem;
  background: var(--accent-dim);
  border-radius: 3px;
  color: var(--accent);
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.contact-info h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.contact-info p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-size: 1.05rem;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s;
}

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

.contact-link i {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1.1rem;
  transition: all 0.2s;
}

.contact-link:hover i {
  border-color: var(--accent);
  background: var(--accent-dim);
}

/* Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  position: relative;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: border-color 0.2s;
  outline: none;
}

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

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

.form-status {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--green);
  display: none;
}

/* Social */
.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
}

.social-link {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 1.2rem;
  text-decoration: none;
  transition: all 0.3s ease;
}

.social-link:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(88,166,255,0.15);
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

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

.footer-text .heart {
  color: var(--accent);
}

/* Code decoration */
.code-comment {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  opacity: 0.7;
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

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

/* Terminal block */
.terminal-block {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin: 2rem 0;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border);
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.terminal-dot.red { background: #f85149; }
.terminal-dot.yellow { background: #d29922; }
.terminal-dot.green { background: #3fb950; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-left: 0.5rem;
}

.terminal-body {
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

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

.terminal-body .key {
  color: var(--purple);
}

.terminal-body .string {
  color: var(--accent);
}

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

/* Responsive */
@media (max-width: 968px) {
  .hero-content { flex-direction: column-reverse; text-align: center; gap: 2rem; }
  .hero-image-frame { width: 200px; height: 200px; }
  .hero-name { font-size: 2.5rem; }
  .hero-cta { justify-content: center; }
  .about-grid { grid-template-columns: 1fr; gap: 2rem; }
  .contact-grid { grid-template-columns: 1fr; gap: 2rem; }
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(13,17,23,0.98);
    border-bottom: 1px solid var(--border);
    padding: 1.5rem 2rem;
    gap: 1rem;
  }
  .nav-toggle { display: block; }
  .section-title { font-size: 2rem; }
  .stack-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); }
}

@media (max-width: 600px) {
  .hero-name { font-size: 2rem; }
  .hero-role { font-size: 1.2rem; }
  .hero-text { width: unset; }
  .hero-image-frame { width: 160px; height: 160px; }
  section { padding: 60px 0; }
  .container { padding: 0 1.25rem; }
}