/* ---------- Tokens ---------- */
:root {
  --bg: #141414;
  --bg-elevated: #181818;
  --bg-card: #1c1c1c;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #ffffff;
  --text-muted: #9a9a9a;
  --text-faint: #6f6f6f;
  --accent-green: #1dbf73;
  --radius-pill: 80px;
  --radius-card: 16px;
  --font-heading: "Manrope", sans-serif;
  --font-body: "Inter", sans-serif;
  --font-mono: "JetBrains Mono", monospace;
  --container-width: 1180px;
}

/* ---------- Reset ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3 { margin: 0; font-family: var(--font-heading); font-weight: 300; }
p { margin: 0; }
.muted { color: var(--text-muted); }

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 32px;
}

section[id] { scroll-margin-top: 88px; }

/* ---------- Reveal animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(20, 20, 20, 0.72);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 15px;
  white-space: nowrap;
}
.avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, #2b6cff, #1dbf73);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  flex: 1;
  justify-content: center;
}
.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); }

.nav-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s, border-color 0.2s;
  flex-shrink: 0;
}
.icon-btn:hover { color: var(--text); border-color: var(--text); }

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: transparent;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  cursor: pointer;
  flex-shrink: 0;
}
.nav-toggle span {
  display: block;
  width: 16px;
  height: 1.5px;
  background: var(--text);
  margin: 0 auto;
  transition: transform 0.25s, opacity 0.25s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.nav-mobile {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 8px 32px 20px;
  border-top: 1px solid var(--border);
}
.nav-mobile-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-faint);
  padding: 10px 0 2px;
}
.nav-mobile-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 15px;
  border-bottom: 1px solid var(--border);
  transition: color 0.2s;
}
.nav-mobile-link:hover { color: var(--text); }
.nav-mobile-link svg { color: var(--text-faint); transition: color 0.2s, transform 0.2s; }
.nav-mobile-link:hover svg { color: var(--text); transform: translate(2px, -2px); }
.site-header.menu-open .nav-mobile { display: flex; }

/* ---------- Buttons / chips ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: -0.28px;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.2s, background 0.2s, border-color 0.2s;
  cursor: pointer;
}
.btn-pill { border-radius: var(--radius-pill); }
.btn-primary { background: #fff; color: var(--bg); }
.btn-primary:hover { transform: translateY(-2px); background: #f0f0f0; }
.btn-outline { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn-outline:hover { background: rgba(255, 255, 255, 0.06); }
.btn-lg { padding: 16px 28px; font-size: 15px; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 100px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(29, 191, 115, 0.55); }
  70% { box-shadow: 0 0 0 7px rgba(29, 191, 115, 0); }
  100% { box-shadow: 0 0 0 0 rgba(29, 191, 115, 0); }
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-muted);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  padding: 5px 12px;
  border-radius: 100px;
  margin-bottom: 18px;
}

/* ---------- Hero ---------- */
.hero { padding: 168px 0 100px; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 64px;
  align-items: center;
}
.hero-copy h1 {
  font-size: clamp(36px, 5vw, 52px);
  line-height: 1.1;
  letter-spacing: -0.5px;
  color: var(--text);
  margin-bottom: 20px;
}
.lead {
  color: var(--text-muted);
  font-size: 17px;
  letter-spacing: 0.1px;
  max-width: 540px;
  margin-bottom: 32px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 36px; }

.hero-stack { display: flex; gap: 10px; flex-wrap: wrap; }
.chip-sm {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  padding: 7px 12px;
  border-radius: 100px;
}

.terminal {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4);
}
.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}
.terminal-bar span[class^="dot-"] { width: 10px; height: 10px; border-radius: 50%; }
.dot-red { background: #ff5f56; }
.dot-yellow { background: #ffbd2e; }
.dot-green { background: #27c93f; }
.terminal-title {
  margin-left: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
}
.terminal-body {
  margin: 0;
  padding: 28px 24px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.9;
  color: #d6d6d6;
  white-space: pre-wrap;
  overflow-x: auto;
}
.t-muted { color: var(--text-faint); }
.t-accent { color: var(--accent-green); }
.cursor { animation: blink 1s step-end infinite; color: var(--accent-green); }
@keyframes blink { 50% { opacity: 0; } }

/* ---------- Sections ---------- */
.section { padding: 100px 0; border-top: 1px solid var(--border); }
.section-head { text-align: center; max-width: 600px; margin: 0 auto 56px; }
.section-head h2 { font-size: clamp(28px, 4vw, 38px); letter-spacing: -0.4px; margin-bottom: 16px; }
.section-head p { font-size: 15.5px; }

/* ---------- Skills chip grid ---------- */
.chip-grid { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px 10px 8px;
  border-radius: 100px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  font-size: 14px;
  color: #e5e5e5;
}
.chip-icon {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: #fff;
}
.chip:nth-of-type(6n+1) .chip-icon { background: #2b6cff; }
.chip:nth-of-type(6n+2) .chip-icon { background: #1dbf73; }
.chip:nth-of-type(6n+3) .chip-icon { background: #8b5cf6; }
.chip:nth-of-type(6n+4) .chip-icon { background: #f59e0b; }
.chip:nth-of-type(6n+5) .chip-icon { background: #ec4899; }
.chip:nth-of-type(6n+6) .chip-icon { background: #06b6d4; }

/* ---------- Project / highlight cards ---------- */
.project-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.project-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: transform 0.3s, border-color 0.3s;
}
.project-card:hover { transform: translateY(-4px); border-color: var(--border-strong); }
.project-visual {
  position: relative;
  height: 150px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 22px;
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: 1px;
}
.project-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.4px;
  padding: 5px 12px;
  border-radius: 100px;
  backdrop-filter: blur(6px);
}
.badge-experimental {
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.4);
  color: #f5b942;
}
.badge-production {
  background: rgba(29, 191, 115, 0.12);
  border: 1px solid rgba(29, 191, 115, 0.4);
  color: #4fe0a0;
}
.project-badge .dot { width: 6px; height: 6px; }
.pv-1 { background: linear-gradient(135deg, #1c3a7a, #142a52); }
.pv-2 { background: linear-gradient(135deg, #1f5c4a, #123a2e); }
.pv-3 { background: linear-gradient(135deg, #5a1f3d, #341226); }
.pv-4 { background: linear-gradient(135deg, #5c4a1f, #342a12); }
.pv-5 { background: linear-gradient(135deg, #0e3a52, #0a2438); }
.pv-6 { background: linear-gradient(135deg, #4a3414, #2a1d0c); }
.project-body { padding: 28px; }
.project-body h3 { font-size: 19px; font-weight: 500; color: var(--text); margin-bottom: 12px; }
.project-body p { color: var(--text-muted); font-size: 14.5px; line-height: 1.65; }
.tag-row { display: flex; gap: 8px; margin-top: 18px; flex-wrap: wrap; }
.tag {
  font-size: 12px;
  color: var(--text-muted);
  border: 1px solid var(--border-strong);
  padding: 5px 12px;
  border-radius: 100px;
}
.project-actions { display: flex; gap: 10px; margin-top: 20px; flex-wrap: wrap; }
.btn-sm { padding: 9px 16px; font-size: 13px; }
.project-note { margin-top: 18px; font-size: 13px; color: var(--text-faint); }

/* ---------- Accordion ---------- */
.accordion { border-top: 1px solid var(--border); }
.accordion-item { border-bottom: 1px solid var(--border); }
.accordion-header {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 20px;
  background: transparent;
  border: none;
  color: var(--text);
  padding: 26px 0;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-heading);
}
.acc-title { flex: 1; font-size: 17px; font-weight: 500; }
.acc-meta {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-faint);
  flex-shrink: 0;
}
.chevron { color: var(--text-muted); transition: transform 0.3s; flex-shrink: 0; }
.accordion-item.open .chevron { transform: rotate(180deg); }

.accordion-panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s ease;
}
.accordion-panel > div { overflow: hidden; }
.accordion-item.open .accordion-panel { grid-template-rows: 1fr; }
.accordion-panel ul { padding-bottom: 28px; display: flex; flex-direction: column; gap: 12px; }
.accordion-panel li {
  position: relative;
  padding-left: 20px;
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.65;
}
.accordion-panel li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent-green);
}

/* ---------- Education ---------- */
.edu-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.edu-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 32px;
  transition: transform 0.3s, border-color 0.3s;
}
.edu-card:hover { transform: translateY(-4px); border-color: var(--border-strong); }
.edu-icon { font-size: 24px; display: block; margin-bottom: 16px; }
.edu-card h3 { font-size: 17px; font-weight: 500; color: var(--text); margin-bottom: 8px; }
.edu-sub { color: #c7c7c7; font-size: 14.5px; margin-bottom: 6px; }
.edu-meta { font-family: var(--font-mono); font-size: 12.5px; color: var(--text-faint); margin-bottom: 12px; }
.edu-desc { color: var(--text-muted); font-size: 14px; line-height: 1.6; }

/* ---------- Contact / CTA ---------- */
.cta-band { text-align: center; }
.cta-inner { display: flex; flex-direction: column; align-items: center; }
.cta-inner .eyebrow { margin-bottom: 18px; }
.cta-inner h2 { margin-bottom: 14px; }
.cta-inner .muted { margin-bottom: 32px; }

.contact-cards {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 40px;
  width: 100%;
}
.contact-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 24px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 14px;
  text-decoration: none;
  min-width: 220px;
  transition: transform 0.25s, border-color 0.25s;
}
.contact-card:hover { transform: translateY(-3px); border-color: var(--border-strong); }
.contact-label-row { display: flex; align-items: center; gap: 6px; }
.contact-icon { color: var(--text-faint); flex-shrink: 0; }
.contact-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-faint);
}
.contact-value { color: var(--text); font-size: 14.5px; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); padding-top: 64px; }
.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  flex-wrap: wrap;
  padding-bottom: 48px;
}
.footer-brand { max-width: 360px; }
.footer-brand .muted { margin: 14px 0 18px; font-size: 14.5px; }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s, border-color 0.2s;
}
.footer-social a:hover { color: var(--text); border-color: var(--text); }
.footer-links { display: flex; flex-direction: column; gap: 12px; align-items: flex-end; }
.footer-links a { color: var(--text-muted); text-decoration: none; font-size: 14px; }
.footer-links a:hover { color: var(--text); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 24px 32px;
  text-align: center;
}
.footer-bottom p { color: var(--text-faint); font-size: 13.5px; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .nav-links { display: none; }
  .project-grid, .edu-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .container { padding: 0 20px; }
  .hero { padding: 140px 0 72px; }
  .section { padding: 72px 0; }
  .accordion-header { flex-wrap: wrap; gap: 8px; }
  .acc-meta { order: 3; flex-basis: 100%; }
  .footer-grid { flex-direction: column; }
  .footer-links { align-items: flex-start; }
  .contact-card { width: 100%; }
}