:root {
  --bg: #0b1020;
  --bg-alt: #0f1630;
  --card: #141c3a;
  --border: #233061;
  --text: #c9d3ee;
  --muted: #8a96b8;
  --heading: #eef2ff;
  --accent: #5eead4;
  --accent-2: #818cf8;
  --radius: 14px;
}

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

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

body {
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
strong { color: var(--heading); font-weight: 600; }

.container { width: min(1100px, 92%); margin: 0 auto; }

/* Nav */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  background: rgba(11, 16, 32, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(35, 48, 97, 0.6);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo { font-weight: 800; font-size: 1.5rem; color: var(--heading); }
.logo span { color: var(--accent); }
.logo:hover { text-decoration: none; }
.nav-links { display: flex; align-items: center; gap: 1.15rem; list-style: none; }
.nav-links a { color: var(--text); font-size: 0.9rem; font-weight: 500; }
.nav-links a:hover { color: var(--accent); text-decoration: none; }
.menu-toggle { display: none; background: none; border: none; color: var(--heading); font-size: 1.6rem; cursor: pointer; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0b1020 !important;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 10px 25px -10px var(--accent); text-decoration: none; }
.btn-outline { background: transparent; color: var(--accent) !important; border: 1.5px solid var(--accent); }
.btn-small { padding: 0.45rem 1rem; font-size: 0.9rem; }

/* Hero */
.hero {
  display: flex; align-items: center;
  padding: 110px 0 40px;
  background:
    radial-gradient(circle at 15% 20%, rgba(94, 234, 212, 0.12), transparent 40%),
    radial-gradient(circle at 85% 70%, rgba(129, 140, 248, 0.15), transparent 45%);
}
.eyebrow { font-family: "JetBrains Mono", monospace; color: var(--accent); margin-bottom: 0.5rem; }
.hero h1 {
  font-size: clamp(2.6rem, 7vw, 4.8rem);
  font-weight: 800; line-height: 1.05;
  color: var(--heading);
  letter-spacing: -0.02em;
}
.role { font-size: clamp(1.2rem, 3vw, 1.9rem); font-weight: 600; color: var(--muted); margin: 0.75rem 0 1.25rem; min-height: 2.4em; }
.typed { color: var(--accent); }
.cursor { color: var(--accent); animation: blink 1s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }
.lead { max-width: 640px; font-size: 1.15rem; margin-bottom: 2rem; }
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }
.hero-cta.center { justify-content: center; margin-top: 2rem; }

.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem;
  margin-top: 3rem; max-width: 760px;
}
.stats div {
  background: rgba(20, 28, 58, 0.7);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  display: flex; flex-direction: column;
}
.stats .num {
  font-size: 1.9rem; font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stats .label { font-size: 0.85rem; color: var(--muted); }
.location { margin-top: 2rem; color: var(--muted); font-size: 0.95rem; }

/* Sections */
.section { padding: 90px 0; }
.section:nth-of-type(odd) { background: var(--bg-alt); }
.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  color: var(--heading);
  margin-bottom: 2.5rem;
  display: flex; align-items: center; gap: 0.75rem;
}
.section-title span { font-family: "JetBrains Mono", monospace; color: var(--accent); font-size: 0.75em; }
.section-title::after { content: ""; flex: 1; height: 1px; background: var(--border); max-width: 300px; }
.section-title.center { justify-content: center; }
.section-title.center::after { display: none; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem;
  transition: border-color 0.25s, transform 0.25s;
}
.card:hover { border-color: rgba(94, 234, 212, 0.45); }
.card h4 { color: var(--heading); font-size: 1.15rem; margin-bottom: 0.6rem; }

/* About */
.about-grid { display: grid; grid-template-columns: 1.6fr 1fr; gap: 2.5rem; align-items: start; }
.about-grid p { margin-bottom: 1rem; font-size: 1.05rem; }

.check-list { list-style: none; }
.check-list li { position: relative; padding-left: 1.6rem; margin-bottom: 0.6rem; }
.check-list li::before { content: "▹"; position: absolute; left: 0; color: var(--accent); }

/* Timeline */
.timeline { position: relative; display: flex; flex-direction: column; gap: 2rem; }
.timeline::before {
  content: ""; position: absolute; left: 180px; top: 0; bottom: 0;
  width: 2px; background: linear-gradient(var(--accent), var(--accent-2), transparent);
}
.timeline-item { display: grid; grid-template-columns: 180px 1fr; gap: 2.5rem; position: relative; }
.timeline-item::before {
  content: ""; position: absolute; left: 174px; top: 1.6rem;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--bg); border: 3px solid var(--accent);
}
.timeline-meta { padding-top: 1.4rem; text-align: right; padding-right: 1.25rem; }
.timeline-meta .date { display: block; font-family: "JetBrains Mono", monospace; font-size: 0.85rem; color: var(--accent); }
.timeline-meta .company { display: block; font-weight: 600; color: var(--heading); font-size: 0.95rem; margin-top: 0.25rem; }
.client { color: var(--muted); font-weight: 500; font-size: 0.95rem; }
.subrole { font-family: "JetBrains Mono", monospace; font-size: 0.85rem; color: var(--accent-2); margin-bottom: 0.8rem; }
.timeline .card ul { margin: 0.8rem 0 0 1.1rem; }
.timeline .card li { margin-bottom: 0.45rem; }

.tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1rem; }
.tags span {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  background: rgba(94, 234, 212, 0.08);
  color: var(--accent);
  border: 1px solid rgba(94, 234, 212, 0.2);
}

/* Skills */
.skills-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.skill-card:hover { transform: translateY(-4px); }

/* Achievements */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.education { margin-top: 1.25rem; }

/* Contact */
.contact-lead { text-align: center; max-width: 620px; margin: 0 auto 2.5rem; font-size: 1.1rem; }
.contact-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.contact-card { display: flex; flex-direction: column; align-items: center; text-align: center; gap: 0.3rem; color: var(--text); }
.contact-card:hover { transform: translateY(-4px); text-decoration: none; }
.contact-card .icon { font-size: 1.8rem; }
.contact-card .c-label { font-size: 0.85rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }
.contact-card .c-value { color: var(--heading); font-weight: 600; word-break: break-all; }

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

/* Shared section intro */
.section-lead { max-width: 720px; margin: -1.2rem 0 2rem; color: var(--muted); }

.sub-title { color: var(--heading); font-size: 1.3rem; margin: 2.5rem 0 1rem; }

/* Principles */
.principles { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1rem; }
.principle h4 { font-size: 1.02rem; }
.principle p { font-size: 0.92rem; }
.p-num {
  display: block;
  font-family: "JetBrains Mono", monospace;
  color: var(--accent);
  font-size: 0.85rem;
  margin-bottom: 0.6rem;
}
.evidence { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.85rem; }
.evidence-item { display: flex; flex-direction: column; gap: 0.2rem; padding: 1.1rem 1.2rem; color: var(--text); }
.evidence-item:hover { text-decoration: none; transform: translateY(-3px); }
.evidence-item strong { font-size: 0.98rem; }
.evidence-item span { color: var(--muted); font-size: 0.86rem; }
.evidence-item span::before { content: "→ "; color: var(--accent); }

/* Before and after */
.before-after { margin-bottom: 1.25rem; }
.ba-table { display: grid; }
.ba-row {
  display: grid;
  grid-template-columns: 1fr 1.4fr 1.6fr;
  gap: 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}
.ba-row:last-child { border-bottom: none; }
.ba-head span {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-2);
}
.ba-row span:first-child { color: var(--heading); font-weight: 600; }
.ba-row:not(.ba-head) span:nth-child(2) { color: var(--muted); }

/* Decisions and lessons */
.decisions { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.decision dl { display: grid; grid-template-columns: auto 1fr; gap: 0.45rem 0.9rem; }
.decision dt {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-2);
  padding-top: 0.2rem;
}
.decision dd { font-size: 0.94rem; }
.lessons li { margin-bottom: 0.85rem; }

/* Impact */
.impact-metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; margin-bottom: 1.25rem; }
.metric { position: relative; overflow: hidden; }
.metric .num {
  display: block;
  font-size: clamp(2.4rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.1;
  margin: 0.4rem 0 0.35rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.metric h4 { margin-bottom: 0.35rem; }
.metric .where { display: block; margin-top: 0.8rem; color: var(--muted); font-size: 0.85rem; }
.badge {
  display: inline-block;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(94, 234, 212, 0.35);
  border-radius: 999px;
  padding: 0.15rem 0.55rem;
}
.impact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.impact-grid p { color: var(--text); }

/* Case studies */
.case { margin-bottom: 1.25rem; }
.kicker {
  font-family: "JetBrains Mono", monospace;
  color: var(--accent);
  font-size: 0.8rem;
  margin-bottom: 0.35rem;
}
.case h4 { font-size: 1.35rem; margin-bottom: 1rem; }
.case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem 1.5rem; }
.case-grid h5 {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 0.3rem;
}

/* Architecture */
.arch { margin-bottom: 1.25rem; }
.arch-note { color: var(--muted); margin-bottom: 1rem; }
.flow { display: flex; align-items: stretch; gap: 0.4rem; }
.flow-step {
  flex: 1;
  background: rgba(94, 234, 212, 0.05);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.85rem 0.7rem;
}
.flow-step strong { display: block; color: var(--heading); margin-bottom: 0.25rem; }
.flow-step span { display: block; color: var(--muted); font-size: 0.82rem; }
.flow-arrow {
  width: 14px;
  position: relative;
  flex: 0 0 14px;
}
.flow-arrow::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 0; right: 0;
  height: 2px;
  background: var(--accent);
}
.flow-arrow::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 0;
  width: 7px; height: 7px;
  border-top: 2px solid var(--accent);
  border-right: 2px solid var(--accent);
  transform: translateY(-50%) rotate(45deg);
}
.arch-split { margin-bottom: 1.25rem; }
.flow-list { margin-left: 1.1rem; }
.flow-list li { margin-bottom: 0.55rem; }
.scale { display: grid; gap: 0.75rem; }
.scale-step { display: grid; grid-template-columns: 42px 1fr; gap: 0.85rem; align-items: start; }
.scale-step > span {
  width: 42px; height: 42px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-weight: 800;
  color: #0b1020;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}
.scale-step p { color: var(--text); }

/* Journal */
.journal { display: grid; gap: 0.85rem; }
.journal-item summary {
  cursor: pointer;
  color: var(--heading);
  font-weight: 600;
  font-size: 1.05rem;
  list-style: none;
}
.journal-item summary::-webkit-details-marker { display: none; }
.journal-item summary::before {
  content: "▸";
  color: var(--accent);
  margin-right: 0.55rem;
  display: inline-block;
}
.journal-item[open] summary::before { content: "▾"; }
.journal-body { margin-top: 0.8rem; }
.journal-body p { margin-bottom: 0.7rem; }

/* Demos */
.demo-tabs { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1rem; }
.demo-tab {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.45rem 0.9rem;
  font: inherit;
  cursor: pointer;
}
.demo-tab.active { color: #0b1020; background: linear-gradient(135deg, var(--accent), var(--accent-2)); border-color: transparent; font-weight: 600; }
.demo-panel.hidden, .hidden { display: none; }
.demo-actions { display: flex; flex-wrap: wrap; gap: 0.6rem; align-items: center; margin-bottom: 0.9rem; }
.demo-input, .demo-code {
  width: 100%;
  background: #0b1020;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.9rem;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.82rem;
  line-height: 1.5;
  resize: vertical;
}
.demo-report { margin-top: 0.9rem; display: grid; gap: 0.45rem; }
.report-line { padding: 0.55rem 0.75rem; border-radius: 8px; background: rgba(255,255,255,0.03); border: 1px solid var(--border); }
.report-line.ok { border-color: rgba(94, 234, 212, 0.45); }
.report-line.warn { border-color: rgba(251, 191, 36, 0.55); }
.report-line.bad { border-color: rgba(251, 113, 133, 0.6); }
.inline-label { display: flex; align-items: center; gap: 0.5rem; color: var(--muted); font-size: 0.9rem; }
.inline-label input[type="range"] { accent-color: var(--accent); }
.batch-stats { display: flex; flex-wrap: wrap; gap: 0.8rem 1.2rem; margin-bottom: 0.9rem; color: var(--muted); font-size: 0.9rem; }
.batch-stats strong { color: var(--heading); margin-left: 0.25rem; }
.batch-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 0.4rem; margin-bottom: 0.9rem; }
.batch-cell {
  aspect-ratio: 1;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #0b1020;
  font-size: 0.68rem;
  display: grid;
  place-items: center;
  color: var(--muted);
}
.batch-cell.running { border-color: var(--accent-2); color: var(--heading); }
.batch-cell.ok { background: rgba(94, 234, 212, 0.32); color: var(--accent); border-color: transparent; }
.batch-cell.retry { background: rgba(251, 191, 36, 0.16); color: #fbbf24; border-color: transparent; }
.batch-cell.bad { background: rgba(251, 113, 133, 0.18); color: #fb7185; border-color: transparent; }
.batch-log { margin-left: 1.1rem; max-height: 160px; overflow: auto; color: var(--muted); font-family: "JetBrains Mono", monospace; font-size: 0.78rem; }
.batch-log li { margin-bottom: 0.25rem; }
#vision-canvas { width: 100%; height: auto; border-radius: 12px; border: 1px solid var(--border); background: #0b1020; display: block; }
.demo-code { margin-top: 0.9rem; white-space: pre-wrap; }
.sample-pills button { font-size: 0.82rem; }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* Responsive */
@media (max-width: 1200px) {
  .menu-toggle { display: block; }
  .nav-links {
    position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; gap: 1.1rem; align-items: flex-start;
    padding: 1.25rem 6%; background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
    display: none;
  }
  .nav-links.open { display: flex; }
}

@media (max-width: 1100px) {
  .principles { grid-template-columns: repeat(3, 1fr); }
  .evidence { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .about-grid, .two-col, .impact-metrics, .impact-grid, .case-grid, .decisions { grid-template-columns: 1fr; }
  .principles { grid-template-columns: 1fr 1fr; }
  .ba-head { display: none; }
  .ba-row { grid-template-columns: 1fr; gap: 0.2rem; }
  .ba-row:not(.ba-head) span:nth-child(2)::before { content: "Before: "; color: var(--accent-2); }
  .ba-row:not(.ba-head) span:nth-child(3)::before { content: "After: "; color: var(--accent); }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .flow { flex-direction: column; }
  .flow-arrow { width: 2px; height: 16px; flex: 0 0 16px; margin-left: 1.2rem; }
  .flow-arrow::before { top: 0; bottom: 0; left: 0; right: auto; width: 2px; height: auto; }
  .flow-arrow::after { top: auto; bottom: 0; left: -3px; right: auto; transform: rotate(135deg); }
  .batch-grid { grid-template-columns: repeat(8, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .timeline::before { left: 6px; }
  .timeline-item { grid-template-columns: 1fr; gap: 0.5rem; padding-left: 2rem; }
  .timeline-item::before { left: 0; top: 0.35rem; }
  .timeline-meta { text-align: left; padding: 0; }
}

@media (max-width: 720px) {
  .skills-grid, .contact-cards, .principles, .evidence { grid-template-columns: 1fr; }
  .batch-grid { grid-template-columns: repeat(6, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .cursor { animation: none; }
}