/* ===================== Design tokens ===================== */
:root {
  --bg: #0a0e16;
  --bg-elev: #111824;
  --bg-inset: #0c1320;
  --bg-header: rgba(10, 14, 22, 0.72);
  --bg-header-solid: rgba(10, 14, 22, 0.96);

  --border: rgba(255, 255, 255, 0.07);
  --border-soft: rgba(255, 255, 255, 0.06);
  --border-mid: rgba(255, 255, 255, 0.1);
  --border-strong: rgba(255, 255, 255, 0.14);

  --text: #e6edf3;
  --text-muted: #aab6c6;
  --text-dim: #8b97a7;
  --text-dimmer: #7e8b9e;
  --text-nav: #93a1b5;
  --text-nav-hover: #cdd6e2;

  --accent: #2dd4bf;
  --accent-2: #38bdf8;
  --accent-ink: #06121a;
  --accent-soft: rgba(45, 212, 191, 0.12);
  --accent-border: rgba(45, 212, 191, 0.22);

  --radius-sm: 8px;
  --radius-md: 11px;
  --radius-lg: 16px;
  --radius-xl: 22px;

  --font-sans: "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", monospace;

  --container: 1120px;
}

/* ===================== Base ===================== */
html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}
body {
  margin: 0;
  background: var(--bg);
}
::selection {
  background: rgba(45, 212, 191, 0.28);
  color: #eafffb;
}
a {
  text-decoration: none;
}
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}
img {
  max-width: 100%;
}
@keyframes ar-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

.page {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ===================== Skip link ===================== */
.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 100;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 14px;
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 12px;
}

/* ===================== Layout helpers ===================== */
.section {
  max-width: var(--container);
  margin: 0 auto;
  padding: 60px 24px;
}
.section-head {
  margin-bottom: 32px;
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}
.section-title {
  margin: 0;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.section-lede {
  margin: 14px 0 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.65;
  color: var(--text-muted);
  max-width: 640px;
}
.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 18px;
}
.projects-grid {
  grid-template-columns: repeat(2, 1fr);
  align-items: stretch;
}
.projects-grid.has-expanded {
  align-items: start;
}
@media (max-width: 760px) {
  .projects-grid {
    grid-template-columns: 1fr;
  }
}

/* ===================== Cards & chips ===================== */
.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}
.icon-tile {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--accent-soft);
  color: var(--accent);
  flex: none;
}
.chip {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-nav-hover);
  background: var(--bg-inset);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 6px 11px;
  border-radius: var(--radius-sm);
}
.chip-sm {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: #9aa6b6;
  background: var(--bg-inset);
  padding: 4px 9px;
  border-radius: 6px;
}
.badge {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  padding: 4px 9px;
  border-radius: 7px;
}

/* ===================== Buttons ===================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: var(--font-sans);
}
.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
}
.btn-outline {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--text);
}
.btn-ghost-accent {
  background: transparent;
  border: 1px solid var(--accent-border);
  color: var(--accent);
}

/* ===================== Header / nav ===================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  background: var(--bg-header);
  border-bottom: 1px solid var(--border-soft);
}
.nav {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--accent-ink);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 15px;
}
.brand-name {
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.01em;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
}
.nav-link {
  color: var(--text-nav);
  font-size: 14.5px;
  font-weight: 500;
  transition: color 0.15s ease;
}
.nav-link.is-active,
.nav-link:hover {
  color: var(--accent);
}
.nav-resume {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 15px;
  border-radius: 9px;
  border: 1px solid var(--accent-border);
  color: var(--accent);
  font-size: 14px;
  font-weight: 600;
}
.menu-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--border-mid);
  border-radius: 9px;
  width: 42px;
  height: 42px;
  color: var(--text);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.mobile-menu {
  display: none;
  flex-direction: column;
  padding: 8px 24px 18px;
  border-top: 1px solid var(--border-soft);
  background: var(--bg-header-solid);
}
.mobile-menu.is-open {
  display: flex;
}
.mobile-link {
  color: var(--text-nav-hover);
  font-size: 16px;
  font-weight: 500;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.mobile-link:last-of-type {
  border-bottom: none;
}
.mobile-resume {
  margin-top: 14px;
  text-align: center;
  padding: 12px;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
  font-size: 15px;
}

@media (max-width: 960px) {
  .nav-links { display: none; }
  .menu-btn { display: flex; }
}

/* ===================== Hero ===================== */
.hero {
  position: relative;
  padding: 140px 24px 76px;
}
.hero-bg-glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(620px 420px at 78% 18%, rgba(56, 189, 248, 0.1), transparent 60%),
    radial-gradient(560px 420px at 12% 8%, rgba(45, 212, 191, 0.1), transparent 60%);
}
.hero-bg-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
  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: 48px 48px;
  mask-image: radial-gradient(700px 500px at 50% 0%, #000, transparent 75%);
  -webkit-mask-image: radial-gradient(700px 500px at 50% 0%, #000, transparent 75%);
}
.hero-inner {
  position: relative;
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 64px;
  flex-wrap: wrap;
}
.hero-text {
  flex: 1 1 440px;
  min-width: 300px;
}
.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  padding: 6px 12px;
  border-radius: 999px;
  margin-bottom: 24px;
}
.hero-pill-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  animation: ar-pulse 2.4s ease-in-out infinite;
}
.hero-name {
  margin: 0 0 14px;
  font-size: clamp(40px, 6vw, 66px);
  line-height: 1.04;
  font-weight: 800;
  letter-spacing: -0.025em;
}
.hero-role-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}
.hero-role {
  font-size: clamp(18px, 2.4vw, 24px);
  font-weight: 600;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-location {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-dimmer);
  font-size: 14.5px;
}
.hero-summary {
  margin: 0 0 34px;
  font-size: clamp(16px, 1.8vw, 19px);
  line-height: 1.6;
  color: var(--text-muted);
  max-width: 600px;
}
.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 13px;
}
.hero-photo-wrap {
  flex: 0 0 auto;
  position: relative;
}
.hero-photo-glow {
  position: absolute;
  inset: -14px;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(45, 212, 191, 0.5), rgba(56, 189, 248, 0.5));
  filter: blur(36px);
  opacity: 0.35;
}
.hero-photo-frame {
  position: relative;
  padding: 7px;
  border-radius: 22px;
  background: linear-gradient(135deg, rgba(45, 212, 191, 0.6), rgba(56, 189, 248, 0.25));
  box-shadow: 0 30px 80px -30px rgba(0, 0, 0, 0.7);
}
.hero-photo {
  display: block;
  width: 300px;
  height: 368px;
  border-radius: 17px;
  object-fit: cover;
}
.hero-uptime {
  position: absolute;
  bottom: -16px;
  left: -16px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border-radius: 12px;
  background: #0e1521;
  border: 1px solid var(--border-mid);
  box-shadow: 0 14px 40px -16px rgba(0, 0, 0, 0.8);
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: #9fe9dd;
}
.hero-uptime-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}

/* ===================== About ===================== */
.about-body {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
  align-items: flex-start;
}
.about-text {
  flex: 1 1 480px;
  margin: 0;
  font-size: clamp(16px, 1.8vw, 18.5px);
  line-height: 1.72;
  color: var(--text-muted);
}
.about-stats {
  flex: 0 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  min-width: 260px;
}
.stat-num {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  font-family: var(--font-mono);
}
.stat-label {
  font-size: 13.5px;
  color: var(--text-dim);
  margin-top: 4px;
}

/* ===================== Skills ===================== */
.skill-card-head {
  display: flex;
  align-items: center;
  gap: 11px;
  margin-bottom: 16px;
}
.skill-card-title {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
}
.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ===================== Services ===================== */
.service-card-title {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
}
.service-desc {
  margin: 14px 0 0;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--text-muted);
}
.service-keywords {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* ===================== Experience ===================== */
.timeline {
  position: relative;
  padding-left: 34px;
}
.timeline-rail {
  position: absolute;
  left: 9px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), rgba(45, 212, 191, 0.08));
}
.timeline-item {
  position: relative;
  margin-bottom: 30px;
}
.timeline-item:last-child {
  margin-bottom: 0;
}
.timeline-dot {
  position: absolute;
  left: -33px;
  top: 5px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent-2);
  box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.1);
}
.timeline-dot.is-current {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.timeline-head {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  align-items: baseline;
  margin-bottom: 8px;
}
.timeline-role {
  margin: 0;
  font-size: 18.5px;
  font-weight: 600;
}
.timeline-role span {
  color: var(--accent);
}
.timeline-period {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-dim);
  white-space: nowrap;
}
.timeline-desc {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--text-muted);
}

/* ===================== Projects & cards ===================== */
.project-card {
  display: flex;
  flex-direction: column;
  padding: 26px;
}
.project-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.project-icon-tile {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 11px;
  background: linear-gradient(135deg, rgba(45, 212, 191, 0.18), rgba(56, 189, 248, 0.12));
  color: var(--accent);
  flex: none;
}
.project-title {
  margin: 0 0 9px;
  font-size: 18px;
  font-weight: 600;
}
.project-desc {
  margin: 0 0 18px;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--text-muted);
  flex: 1;
}
.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}
.project-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 16px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--accent);
}

/* ===================== Project details (expandable) ===================== */
.project-details {
  margin-top: 18px;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}
.project-details-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  cursor: pointer;
  list-style: none;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  user-select: none;
}
.project-details-toggle::-webkit-details-marker {
  display: none;
}
.project-details-toggle::after {
  content: "";
  flex: none;
  width: 9px;
  height: 9px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform 0.2s ease;
}
.project-details[open] .project-details-toggle::after {
  transform: rotate(-135deg);
}
.project-details-body {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.project-detail-block h4 {
  margin: 0 0 6px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.project-detail-block p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--text-muted);
}
.project-detail-block ul {
  margin: 0;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--text-muted);
}
.project-detail-block li + li {
  margin-top: 4px;
}
.project-detail-block li strong {
  color: var(--text);
  font-weight: 600;
}

/* ===================== Case studies ===================== */
.case-study {
  padding: 28px;
}
.case-study + .case-study {
  margin-top: 18px;
}
.case-study-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.case-study-head-left {
  display: flex;
  align-items: center;
  gap: 13px;
}
.case-study-title {
  margin: 0;
  font-size: 19px;
  font-weight: 600;
}
.case-study-diagram {
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
  margin-bottom: 20px;
  overflow-x: auto;
}
.case-study-diagram svg {
  display: block;
  width: 100%;
  height: auto;
  min-width: 480px;
}
.case-study-overview {
  margin: 0 0 18px;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--text-muted);
}
.case-study-body {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}

/* ===================== Blog ===================== */
.blog-card {
  display: flex;
  flex-direction: column;
  padding: 0;
  overflow: hidden;
  color: var(--text);
  transition: border-color 0.15s ease;
}
.blog-card:hover {
  border-color: var(--accent-border);
}
.blog-card-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  background-color: var(--bg-inset);
  background-size: cover;
  background-position: center;
}
.blog-card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}
.blog-card-date {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-dim);
}
.blog-card-title {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
}
.blog-card-excerpt {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text-muted);
}

/* ===================== Contact ===================== */
.contact-panel {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #0e1521, #0c1320);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-xl);
  padding: clamp(32px, 5vw, 56px);
  text-align: center;
}
.contact-glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(500px 280px at 50% 0%, rgba(45, 212, 191, 0.12), transparent 70%);
}
.contact-body {
  position: relative;
}
.contact-lede {
  margin: 0 auto 30px;
  max-width: 520px;
  font-size: 16.5px;
  line-height: 1.6;
  color: var(--text-muted);
}
.contact-ctas {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 13px;
  margin-bottom: 26px;
}
.contact-socials {
  display: flex;
  justify-content: center;
  gap: 12px;
}
.social-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 11px;
  background: var(--bg-inset);
  border: 1px solid var(--border-mid);
  color: var(--text-nav-hover);
}

/* ===================== Footer ===================== */
.site-footer {
  border-top: 1px solid var(--border-soft);
  padding: 56px 24px 28px;
}
.footer-top {
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--border-soft);
}
.footer-brand {
  max-width: 380px;
}
.footer-tagline {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-dim);
}
.footer-socials {
  display: flex;
  gap: 10px;
}
.footer-socials .social-btn {
  width: 40px;
  height: 40px;
}
.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 11px;
}
.footer-nav-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 3px;
}
.footer-nav a {
  font-size: 14px;
  color: var(--text-nav);
  transition: color 0.15s ease;
}
.footer-nav a:hover {
  color: var(--accent);
}
.footer-bottom {
  max-width: var(--container);
  margin: 28px auto 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-text {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-dim);
}
.footer-top-link {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-nav);
  transition: color 0.15s ease;
}
.footer-top-link:hover {
  color: var(--accent);
}
@media (max-width: 760px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
}

/* ===================== Scroll reveal ===================== */
[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}