:root {
  --bg: #12151a;
  --bg-elevated: #171b22;
  --bg-panel: #1d232b;
  --border: rgba(255, 255, 255, 0.08);
  --text: #f6f7fb;
  --text-muted: #94a0b4;
  --accent: #39ff88;
  --accent-2: #00d4ff;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  height: 100%;
}

/*
  Background lives on html, pinned with background-attachment: fixed.
  This decouples it from body/content height, so it never reflows,
  tiles, or seams at old-viewport boundaries as the page grows
  (e.g. when web fonts or images shift layout after first paint).
*/
html {
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(0, 212, 255, 0.14), transparent 40%),
    radial-gradient(circle at 88% 92%, rgba(57, 255, 136, 0.08), transparent 45%),
    linear-gradient(135deg, var(--bg), #0a0d11 100%);
  background-attachment: fixed, fixed, fixed;
  background-size: cover, cover, cover;
  background-repeat: no-repeat, no-repeat, no-repeat;
}

body {
  margin: 0;
  min-height: 100%;
  font-family: "Inter", sans-serif;
  color: var(--text);
  background: transparent;
  line-height: 1.6;
}

html::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 38px 38px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(0, 0, 0, 0.55), transparent 75%);
}

.site-shell {
  position: relative;
  z-index: 1;
}

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

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

.site-shell {
  width: min(1200px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 3rem 0 2.5rem;
}

.section {
  padding: 3.5rem 0;
}

.hero {
  display: grid;
  gap: 2rem;
  align-items: center;
  padding-top: 1rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 1rem;
}

.eyebrow::before {
  content: "";
  width: 1.8rem;
  height: 1px;
  background: linear-gradient(90deg, var(--accent-2), transparent);
  transform-origin: left center;
  transform: scaleX(0);
  transition: transform 500ms ease 150ms;
}

.reveal.is-visible .eyebrow::before {
  transform: scaleX(1);
}

.hero h1,
.section-heading h2,
.project-card h3,
.info-card h3,
.timeline-card h3 {
  font-family: "JetBrains Mono", monospace;
  letter-spacing: -0.025em;
}

.hero h1 {
  font-size: clamp(2rem, 4.3vw, 3.35rem);
  line-height: 1.1;
  margin: 0 0 1rem;
  background: linear-gradient(100deg, var(--text) 55%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 0 1.5rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-bottom: 1.4rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.2rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-weight: 600;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 0 0 1px rgba(57, 255, 136, 0.16), 0 10px 24px rgba(0, 212, 255, 0.16);
}

.btn-primary {
  background: linear-gradient(90deg, rgba(57, 255, 136, 0.2), rgba(0, 212, 255, 0.16));
  color: var(--text);
  border-color: rgba(57, 255, 136, 0.22);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.02);
  color: var(--text);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.hero-meta span,
.stack-tags span,
.pill {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--text-muted);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
}

.terminal-card,
.info-card,
.project-card,
.timeline-card,
.contact-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.015));
  border: 1px solid var(--border);
  border-radius: 1.2rem;
  box-shadow: var(--shadow);
  transition: border-color 220ms ease, transform 220ms ease;
}

.info-card:hover,
.project-card:hover,
.timeline-card:hover,
.contact-card:hover {
  border-color: rgba(57, 255, 136, 0.28);
  transform: translateY(-3px);
}

.terminal-card {
  overflow: hidden;
}

.terminal-topbar {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.8rem 1rem;
  background: rgba(0, 0, 0, 0.25);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.terminal-title {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.terminal-dots span {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  display: inline-block;
  margin-right: 0.4rem;
}

.terminal-dots span:nth-child(1) { background: #ff5f56; }
.terminal-dots span:nth-child(2) { background: #ffbd2e; }
.terminal-dots span:nth-child(3) { background: #27c93f; }

.terminal-body {
  padding: 1rem 1rem 1.2rem;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.92rem;
  color: #dce7ef;
  min-height: 250px;
}

.terminal-line {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 1.4rem;
  margin-bottom: 0.45rem;
  white-space: pre-wrap;
}

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

.cursor {
  display: inline-block;
  width: 0.7rem;
  height: 1rem;
  background: var(--accent-2);
  margin-left: 0.2rem;
  animation: blink 1s step-end infinite;
  vertical-align: text-bottom;
}

.section-heading {
  margin-bottom: 1.5rem;
}

.section-heading h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.95rem);
  margin: 0;
  max-width: 640px;
}

.card-grid,
.project-grid,
.timeline-grid,
.contact-grid {
  display: grid;
  gap: 1rem;
}

.info-card,
.project-card,
.timeline-card,
.contact-card {
  padding: 1.4rem;
}

.info-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 0.7rem;
  margin-bottom: 0.9rem;
  font-size: 1.1rem;
  color: var(--accent);
  background: rgba(57, 255, 136, 0.08);
  border: 1px solid rgba(57, 255, 136, 0.18);
}

.info-card h3,
.project-card h3 {
  margin: 0 0 0.7rem;
  font-size: 1.05rem;
}

.info-card p,
.project-card li {
  color: var(--text-muted);
}

.info-card p {
  margin: 0;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 6.8rem;
}

.contact-card .info-icon {
  flex: 0 0 auto;
  margin: 0;
}

.contact-card h3 {
  margin: 0 0 0.2rem;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.contact-link {
  color: var(--accent-2);
  overflow-wrap: anywhere;
  transition: color 180ms ease;
}

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

.project-card ul {
  padding-left: 1.1rem;
  margin: 0 0 1rem;
}

.project-card li + li {
  margin-top: 0.45rem;
}

.diagram {
  border: 1px solid rgba(57, 255, 136, 0.16);
  border-radius: 0.9rem;
  padding: 0.9rem;
  background: rgba(0, 0, 0, 0.2);
  margin-bottom: 1rem;
}

.diagram svg {
  width: 100%;
  height: auto;
}

.diagram rect {
  stroke: rgba(0, 212, 255, 0.75);
  stroke-width: 2;
  fill: rgba(255, 255, 255, 0.05);
}

.diagram line {
  stroke: rgba(0, 212, 255, 0.75);
  stroke-width: 2;
}

.diagram .node-label {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  fill: var(--text-muted);
  text-anchor: middle;
}

.diagram .node-label.small {
  font-size: 10px;
}

.stack-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* Experience & Education timeline cards */
.timeline-card {
  position: relative;
  padding-left: 1.6rem;
  overflow: hidden;
}

.timeline-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
}

.timeline-tag {
  display: inline-block;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 0.6rem;
}

.timeline-card h3 {
  margin: 0 0 0.2rem;
  font-size: 1.05rem;
}

.timeline-org {
  margin: 0;
  color: var(--text);
  font-weight: 600;
}

.timeline-period {
  margin: 0.2rem 0 0.8rem;
  color: var(--text-muted);
  font-size: 0.88rem;
  font-family: "JetBrains Mono", monospace;
}

.timeline-card > p:last-child {
  margin: 0;
  color: var(--text-muted);
}

.marquee-section {
  padding-top: 1rem;
}

.marquee {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.8rem 0;
  background: rgba(255, 255, 255, 0.02);
}

.marquee:hover .marquee-track {
  animation-play-state: paused;
}

.marquee-track {
  display: flex;
  gap: 0.9rem;
  width: max-content;
  animation: marquee 24s linear infinite;
}

.marquee-track .pill {
  transition: border-color 180ms ease, color 180ms ease, box-shadow 180ms ease;
}

.marquee-track .pill:hover {
  color: var(--accent);
  border-color: rgba(57, 255, 136, 0.24);
  box-shadow: 0 0 0 1px rgba(57, 255, 136, 0.1);
}

footer {
  padding: 2rem 0 1rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
  margin-top: 1.5rem;
}

/* Section-level reveal (fade + rise) */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 700ms cubic-bezier(0.22, 1, 0.36, 1), transform 700ms cubic-bezier(0.22, 1, 0.36, 1);
}

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

/* Staggered child reveal for grids — subtle, professional cascade */
.card-grid > *,
.project-grid > *,
.timeline-grid > *,
.contact-grid > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 550ms ease, transform 550ms ease;
  transition-delay: 0ms;
}

.reveal.is-visible .card-grid > *,
.reveal.is-visible .project-grid > *,
.reveal.is-visible .timeline-grid > *,
.reveal.is-visible .contact-grid > * {
  opacity: 1;
  transform: translateY(0);
}

.reveal.is-visible .card-grid > *:nth-child(1),
.reveal.is-visible .project-grid > *:nth-child(1),
.reveal.is-visible .timeline-grid > *:nth-child(1),
.reveal.is-visible .contact-grid > *:nth-child(1) { transition-delay: 40ms; }
.reveal.is-visible .card-grid > *:nth-child(2),
.reveal.is-visible .project-grid > *:nth-child(2),
.reveal.is-visible .timeline-grid > *:nth-child(2),
.reveal.is-visible .contact-grid > *:nth-child(2) { transition-delay: 130ms; }
.reveal.is-visible .card-grid > *:nth-child(3),
.reveal.is-visible .project-grid > *:nth-child(3),
.reveal.is-visible .contact-grid > *:nth-child(3) { transition-delay: 220ms; }
.reveal.is-visible .card-grid > *:nth-child(4) { transition-delay: 310ms; }
.reveal.is-visible .card-grid > *:nth-child(5) { transition-delay: 400ms; }
.reveal.is-visible .card-grid > *:nth-child(6) { transition-delay: 490ms; }

/* Marquee pills drift in on first view, then hand off to the loop */
.marquee-section .pill {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 500ms ease, transform 500ms ease;
}

.marquee-section.is-visible .pill {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal,
  .card-grid > *,
  .project-grid > *,
  .timeline-grid > *,
  .contact-grid > *,
  .marquee-section .pill,
  .eyebrow::before {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .marquee-track {
    animation: none;
  }

  .cursor {
    animation: none;
  }
}

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

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

@media (min-width: 760px) {
  .hero {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .project-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .timeline-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .contact-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 759px) {
  .site-shell {
    width: min(100% - 1.2rem, 1200px);
  }

  .section {
    padding: 3rem 0;
  }
}