/* === Custom Properties === */
:root {
  --color-bg: #0a0a0c;
  --color-surface: #121418;
  --color-surface-hover: #1a1d22;
  --color-text-primary: #e4e4e7;
  --color-text-secondary: #a1a1aa;
  --color-accent: #22d3ee;
  --color-accent-glow: rgba(34, 211, 238, 0.12);
  --color-border: #27272a;
  --color-terminal-green: #4ade80;
  --color-terminal-yellow: #facc15;
  --color-terminal-red: #f87171;

  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --space-section: 5rem;
  --space-container: 1.5rem;
  --max-width: 48rem;
  --border-radius: 0.375rem;
}

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

html {
  background: var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body { min-height: 100vh; }

a { color: var(--color-accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--color-text-primary); }

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

/* === Terminal Bar === */
#terminal-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2rem;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  padding: 0 1rem;
  gap: 0.5rem;
  z-index: 100;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.dot {
  width: 0.625rem;
  height: 0.625rem;
  border-radius: 50%;
}

.dot.red    { background: var(--color-terminal-red); }
.dot.yellow { background: var(--color-terminal-yellow); }
.dot.green  { background: var(--color-terminal-green); }

.bar-title {
  margin-left: 0.5rem;
  opacity: 0.5;
}

/* === Hero === */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem var(--space-container);
  padding-top: 4rem;
}

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

.prompt {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-terminal-green);
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}

#hero-name {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.headline {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--color-accent);
  min-height: 1.5em;
  letter-spacing: 0.03em;
}

.headline::after {
  content: '_';
  animation: blink 1s step-end infinite;
}

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

.location {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-top: 0.5rem;
  min-height: 1.25em;
}

/* Hero Social Icons */
.hero-social {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
}

.hero-social a {
  color: var(--color-text-secondary);
  padding: 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.hero-social a:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  box-shadow: 0 0 12px var(--color-accent-glow);
}

.hero-scroll-hint {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin-top: 3rem;
  opacity: 0.5;
  animation: fadeInOut 2s ease-in-out infinite;
}

@keyframes fadeInOut {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.7; }
}

/* === Sections === */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-container);
}

section {
  padding-block: var(--space-section);
  border-bottom: 1px solid var(--color-border);
}

section:last-of-type { border-bottom: none; }

.section-prompt {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-terminal-green);
  margin-bottom: 1.5rem;
  letter-spacing: 0.05em;
  opacity: 0.7;
}

.section-body {
  font-size: 1.0625rem;
  color: var(--color-text-primary);
  line-height: 1.75;
}

.section-body p + p { margin-top: 0.75rem; }

.empty-state {
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

/* === Skills === */
.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 0.25rem 0.625rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.skill-tag:hover {
  border-color: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent-glow);
}

/* === Timeline (Experience) === */
.timeline {
  position: relative;
  padding-left: 1.5rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.4rem;
  bottom: 0;
  width: 1px;
  background: var(--color-border);
}

.timeline-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
  transition: border-color 0.2s, background 0.2s;
}

.timeline-card::before {
  content: '';
  position: absolute;
  left: -1.85rem;
  top: 1.25rem;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 6px var(--color-accent-glow);
}

.timeline-card:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-accent);
}

.timeline-card .date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.25rem;
}

.timeline-card .role {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-primary);
}

.timeline-card .company {
  font-size: 0.875rem;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.timeline-card .desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* === Education === */
.edu-list { display: flex; flex-direction: column; gap: 0.75rem; }

.edu-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 1rem 1.25rem;
  transition: border-color 0.2s;
}

.edu-card:hover { border-color: var(--color-accent); }

.edu-card .school {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-primary);
}

.edu-card .degree {
  font-size: 0.875rem;
  color: var(--color-accent);
  margin-top: 0.125rem;
}

.edu-card .field {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin-top: 0.125rem;
}

/* === Articles === */
.articles-grid {
  display: grid;
  gap: 0.75rem;
}

.article-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 1rem 1.25rem;
  display: flex;
  gap: 1rem;
  align-items: center;
  transition: border-color 0.2s, background 0.2s;
}

.article-card:hover {
  border-color: var(--color-accent);
  background: var(--color-surface-hover);
}

.article-card img {
  width: 3rem;
  height: 3rem;
  border-radius: var(--border-radius);
  object-fit: cover;
  flex-shrink: 0;
  background: var(--color-border);
}

.article-card .title {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-text-primary);
  font-weight: 500;
}

.article-card .arrow {
  margin-left: auto;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  font-size: 1rem;
  flex-shrink: 0;
}

/* === Contact === */
#contact .section-body { margin-bottom: 1.5rem; }

.contact-links { display: flex; flex-direction: column; gap: 0.5rem; }

.contact-link {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-accent);
  padding: 0.625rem 0.75rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  transition: border-color 0.2s, background 0.2s;
  word-break: break-all;
}

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

/* === Footer === */
#footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem var(--space-container);
  text-align: center;
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
}

.footer-tag {
  margin-top: 0.5rem;
  color: var(--color-terminal-green);
}

.cursor { animation: blink 1s step-end infinite; }

/* === Section Reveals === */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

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

/* === Responsive === */
@media (min-width: 640px) {
  #hero-name { font-size: 3.5rem; }
  .headline { font-size: 1.125rem; }
  .articles-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-links { flex-direction: row; flex-wrap: wrap; }
}

@media (min-width: 768px) {
  :root { --space-section: 6rem; }
  #hero-name { font-size: 4rem; }
  .headline { font-size: 1.25rem; }
  .timeline-card { padding: 1.25rem 1.5rem; }
}