:root {
  color-scheme: dark;
  --bg: #07111f;
  --panel: rgba(15, 23, 42, 0.78);
  --panel-strong: #0f172a;
  --text: #e5edf7;
  --muted: #9fb0c7;
  --accent: #60a5fa;
  --accent-2: #22d3ee;
  --line: rgba(148, 163, 184, 0.22);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.32);
  --radius: 24px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(96, 165, 250, 0.26), transparent 34rem),
    radial-gradient(circle at 85% 8%, rgba(34, 211, 238, 0.18), transparent 28rem),
    linear-gradient(180deg, #08111f 0%, #0b1120 50%, #060b14 100%);
  line-height: 1.6;
}

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

.hero,
.section,
.footer {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 28px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand::before {
  content: "";
  width: 13px;
  height: 13px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 22px rgba(96, 165, 250, 0.95);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 0.96rem;
}

.nav-links a:hover {
  color: var(--text);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.58);
  color: var(--muted);
}

.lang-switch a,
.lang-switch strong {
  min-width: 34px;
  padding: 5px 9px;
  border-radius: 999px;
  text-align: center;
  font-size: 0.78rem;
  line-height: 1;
}

.lang-switch strong {
  color: #06111f;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 44px;
  align-items: center;
  min-height: 72vh;
  padding: 54px 0 86px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent-2);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 880px;
  margin-bottom: 24px;
  font-size: clamp(2.75rem, 7vw, 5.9rem);
  line-height: 0.96;
  letter-spacing: -0.075em;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(2rem, 4vw, 3.3rem);
  line-height: 1.02;
  letter-spacing: -0.045em;
}

h3 {
  margin-bottom: 12px;
  font-size: 1.14rem;
  line-height: 1.25;
}

.lead {
  max-width: 760px;
  color: var(--muted);
  font-size: clamp(1.06rem, 2vw, 1.28rem);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  font-weight: 750;
  border: 1px solid var(--line);
}

.button.primary {
  color: #06101f;
  background: linear-gradient(135deg, #93c5fd, #22d3ee);
  border-color: transparent;
  box-shadow: 0 18px 50px rgba(37, 99, 235, 0.28);
}

.button.secondary {
  color: var(--text);
  background: rgba(15, 23, 42, 0.7);
}

.hero-card,
.project-card,
.capability,
.resume-card,
.principles article,
.contact-card,
.diagram-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.82), rgba(15, 23, 42, 0.58));
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero-card {
  padding: 28px;
}

.hero-card h2 {
  font-size: 1.45rem;
  letter-spacing: -0.025em;
}

.metrics {
  display: grid;
  gap: 16px;
  padding: 0;
  margin: 24px 0 0;
  list-style: none;
}

.metrics li {
  padding: 16px;
  border: 1px solid rgba(148, 163, 184, 0.16);
  border-radius: 18px;
  background: rgba(2, 6, 23, 0.26);
}

.metrics strong,
.metrics span {
  display: block;
}

.metrics strong {
  margin-bottom: 5px;
}

.metrics span {
  color: var(--muted);
  font-size: 0.94rem;
}

.section {
  padding: 82px 0;
}

.section.alt {
  width: 100%;
  max-width: none;
  padding-left: max(20px, calc((100% - var(--max)) / 2));
  padding-right: max(20px, calc((100% - var(--max)) / 2));
  background: rgba(15, 23, 42, 0.32);
  border-top: 1px solid rgba(148, 163, 184, 0.12);
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
}

.section-heading {
  max-width: 800px;
  margin-bottom: 34px;
}

.section-heading p:not(.eyebrow) {
  color: var(--muted);
  font-size: 1.04rem;
}

.resume-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr 1fr 1fr;
  gap: 18px;
}

.resume-card {
  padding: 24px;
}

.resume-card.highlight {
  background:
    linear-gradient(135deg, rgba(96, 165, 250, 0.18), rgba(34, 211, 238, 0.08)),
    linear-gradient(180deg, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.62));
}

.resume-card p {
  color: var(--muted);
}

.diagram-card {
  padding: 18px;
  overflow: hidden;
}

.diagram-card svg {
  display: block;
  width: 100%;
  height: auto;
  min-height: 360px;
}

.diagram-card text {
  fill: var(--text);
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 16px;
  font-weight: 800;
}

.diagram-card text.small {
  fill: #cbd5e1;
  font-size: 12px;
  font-weight: 700;
}

.diagram-card text.tiny {
  fill: #94a3b8;
  font-size: 11px;
  font-weight: 650;
}

.capability-grid,
.principles {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.demo-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.demo-strip article {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  min-height: 100%;
  padding: 26px;
  border: 1px solid rgba(96, 165, 250, 0.28);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(96, 165, 250, 0.16), rgba(34, 211, 238, 0.08)),
    rgba(15, 23, 42, 0.72);
  box-shadow: var(--shadow);
}

.demo-strip h3 {
  margin-bottom: 0;
  font-size: 1.35rem;
}

.demo-strip p:not(.eyebrow) {
  color: var(--muted);
}

.inline-link {
  color: #93c5fd;
  font-weight: 800;
  text-decoration: underline;
  text-decoration-color: rgba(147, 197, 253, 0.45);
  text-underline-offset: 4px;
}

.capability,
.principles article {
  padding: 24px;
}

.capability p,
.project-card p,
.principles p,
.contact p {
  color: var(--muted);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.project-card {
  padding: 24px;
}

.project-card.featured {
  grid-column: span 2;
  background:
    linear-gradient(135deg, rgba(96, 165, 250, 0.18), transparent 42%),
    linear-gradient(180deg, rgba(15, 23, 42, 0.88), rgba(15, 23, 42, 0.62));
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.tag-row span {
  padding: 5px 10px;
  border: 1px solid rgba(96, 165, 250, 0.28);
  border-radius: 999px;
  color: #bfdbfe;
  background: rgba(37, 99, 235, 0.14);
  font-size: 0.76rem;
  font-weight: 750;
}

dl {
  display: grid;
  gap: 12px;
  margin: 20px 0 0;
}

dl div {
  padding-top: 12px;
  border-top: 1px solid rgba(148, 163, 184, 0.12);
}

dt {
  color: #bfdbfe;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

dd {
  margin: 4px 0 0;
  color: var(--muted);
}

.contact {
  display: grid;
  grid-template-columns: 1fr minmax(280px, 0.42fr);
  gap: 28px;
  align-items: center;
}

.contact-card {
  display: grid;
  gap: 12px;
  padding: 24px;
}

.contact-card a {
  color: #bfdbfe;
  font-weight: 750;
  overflow-wrap: anywhere;
}

.footer {
  padding: 34px 0 48px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (max-width: 980px) {
  .hero-grid,
  .contact {
    grid-template-columns: 1fr;
  }

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

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

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

@media (max-width: 680px) {
  .hero,
  .section,
  .footer {
    width: min(var(--max), calc(100% - 28px));
  }

  .nav {
    align-items: flex-start;
    gap: 18px;
    flex-direction: column;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 12px 16px;
  }

  .hero-grid {
    min-height: auto;
    padding-top: 34px;
  }

  .capability-grid,
  .principles,
  .project-grid,
  .resume-grid,
  .demo-strip {
    grid-template-columns: 1fr;
  }

  .diagram-card {
    padding: 10px;
    overflow-x: auto;
  }

  .diagram-card svg {
    min-width: 760px;
    min-height: 320px;
  }

  .project-card.featured {
    grid-column: auto;
  }
}