:root {
  color-scheme: dark light;
  --bg: #080b12;
  --bg-soft: #0f1624;
  --card: rgba(17, 25, 40, 0.82);
  --card-strong: rgba(23, 34, 54, 0.95);
  --line: rgba(148, 163, 184, 0.18);
  --text: #e5eefb;
  --muted: #99a8bd;
  --accent: #67e8f9;
  --accent-strong: #22d3ee;
  --green: #9ae6b4;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.36);
  --subtle-button-bg: rgba(255, 255, 255, 0.04);
  --subtle-chip-bg: rgba(255, 255, 255, 0.035);
  --terminal-bg: rgba(8, 13, 24, 0.84);
  --terminal-bar-bg: rgba(255, 255, 255, 0.03);
  --card-shadow: 0 16px 50px rgba(0, 0, 0, 0.16);
  --header-bg: linear-gradient(180deg, rgba(8, 11, 18, 0.78) 0%, rgba(8, 11, 18, 0.42) 62%, rgba(8, 11, 18, 0) 100%);
  --body-bg:
    radial-gradient(circle at 20% 0%, rgba(34, 211, 238, 0.18), transparent 32rem),
    radial-gradient(circle at 80% 10%, rgba(59, 130, 246, 0.14), transparent 30rem),
    linear-gradient(180deg, #070a11 0%, #0b1020 48%, #070a11 100%);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f8fbff;
    --bg-soft: #eef6ff;
    --card: rgba(255, 255, 255, 0.82);
    --card-strong: rgba(255, 255, 255, 0.95);
    --line: rgba(15, 23, 42, 0.12);
    --text: #0f172a;
    --muted: #526173;
    --accent: #0891b2;
    --accent-strong: #06b6d4;
    --green: #166534;
    --shadow: 0 24px 80px rgba(15, 23, 42, 0.12);
    --subtle-button-bg: rgba(15, 23, 42, 0.04);
    --subtle-chip-bg: rgba(15, 23, 42, 0.035);
    --terminal-bg: rgba(255, 255, 255, 0.9);
    --terminal-bar-bg: rgba(15, 23, 42, 0.03);
    --card-shadow: 0 16px 50px rgba(15, 23, 42, 0.08);
    --header-bg: linear-gradient(180deg, rgba(248, 251, 255, 0.82) 0%, rgba(248, 251, 255, 0.5) 62%, rgba(248, 251, 255, 0) 100%);
    --body-bg:
      radial-gradient(circle at 20% 0%, rgba(6, 182, 212, 0.16), transparent 32rem),
      radial-gradient(circle at 80% 10%, rgba(59, 130, 246, 0.12), transparent 30rem),
      linear-gradient(180deg, #f8fbff 0%, #edf7ff 48%, #ffffff 100%);
  }
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f8fbff;
  --bg-soft: #eef6ff;
  --card: rgba(255, 255, 255, 0.82);
  --card-strong: rgba(255, 255, 255, 0.95);
  --line: rgba(15, 23, 42, 0.12);
  --text: #0f172a;
  --muted: #526173;
  --accent: #0891b2;
  --accent-strong: #06b6d4;
  --green: #166534;
  --shadow: 0 24px 80px rgba(15, 23, 42, 0.12);
  --subtle-button-bg: rgba(15, 23, 42, 0.04);
  --subtle-chip-bg: rgba(15, 23, 42, 0.035);
  --terminal-bg: rgba(255, 255, 255, 0.9);
  --terminal-bar-bg: rgba(15, 23, 42, 0.03);
  --card-shadow: 0 16px 50px rgba(15, 23, 42, 0.08);
  --header-bg: linear-gradient(180deg, rgba(248, 251, 255, 0.82) 0%, rgba(248, 251, 255, 0.5) 62%, rgba(248, 251, 255, 0) 100%);
  --body-bg:
    radial-gradient(circle at 20% 0%, rgba(6, 182, 212, 0.16), transparent 32rem),
    radial-gradient(circle at 80% 10%, rgba(59, 130, 246, 0.12), transparent 30rem),
    linear-gradient(180deg, #f8fbff 0%, #edf7ff 48%, #ffffff 100%);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #080b12;
  --bg-soft: #0f1624;
  --card: rgba(17, 25, 40, 0.82);
  --card-strong: rgba(23, 34, 54, 0.95);
  --line: rgba(148, 163, 184, 0.18);
  --text: #e5eefb;
  --muted: #99a8bd;
  --accent: #67e8f9;
  --accent-strong: #22d3ee;
  --green: #9ae6b4;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.36);
  --subtle-button-bg: rgba(255, 255, 255, 0.04);
  --subtle-chip-bg: rgba(255, 255, 255, 0.035);
  --terminal-bg: rgba(8, 13, 24, 0.84);
  --terminal-bar-bg: rgba(255, 255, 255, 0.03);
  --card-shadow: 0 16px 50px rgba(0, 0, 0, 0.16);
  --header-bg: linear-gradient(180deg, rgba(8, 11, 18, 0.78) 0%, rgba(8, 11, 18, 0.42) 62%, rgba(8, 11, 18, 0) 100%);
  --body-bg:
    radial-gradient(circle at 20% 0%, rgba(34, 211, 238, 0.18), transparent 32rem),
    radial-gradient(circle at 80% 10%, rgba(59, 130, 246, 0.14), transparent 30rem),
    linear-gradient(180deg, #070a11 0%, #0b1020 48%, #070a11 100%);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--body-bg);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  width: 100%;
  margin: 0;
  padding: 1rem max(1rem, calc((100vw - 1120px) / 2));
  background: var(--header-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.nav,
.brand,
.hero-actions,
.links,
.site-footer {
  display: flex;
  align-items: center;
}

.brand {
  gap: 0.75rem;
  flex: 0 0 auto;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-avatar {
  width: 2.35rem;
  height: 2.35rem;
  flex: 0 0 2.35rem;
  border: 1px solid var(--line);
  border-radius: 0.85rem;
  object-fit: cover;
  box-shadow: 0 12px 32px rgba(34, 211, 238, 0.12);
}

.nav {
  gap: 1rem;
  margin-left: auto;
  color: var(--muted);
  font-size: 0.94rem;
  white-space: nowrap;
}

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

.nav-button,
.button,
.theme-toggle {
  border: 1px solid var(--line);
  border-radius: 999px;
}

.nav-button {
  padding: 0.55rem 0.85rem;
  color: var(--text);
  background: var(--subtle-button-bg);
}

.theme-toggle {
  display: inline-grid;
  place-items: center;
  width: 2.35rem;
  height: 2.35rem;
  flex: 0 0 2.35rem;
  padding: 0;
  color: var(--text);
  background: var(--subtle-button-bg);
  cursor: pointer;
  font: inherit;
  line-height: 1;
}

.theme-toggle:hover {
  color: var(--accent);
  border-color: rgba(34, 211, 238, 0.42);
}

.theme-toggle-icon {
  display: block;
  font-size: 1rem;
}

.hero,
.section,
.cta {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 3rem;
  align-items: center;
  padding: 6rem 0 5rem;
}

.eyebrow {
  margin: 0 0 0.85rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 780px;
  margin-bottom: 1.3rem;
  font-size: clamp(2.6rem, 8vw, 5.8rem);
  line-height: 0.92;
  letter-spacing: -0.075em;
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1;
  letter-spacing: -0.055em;
}

h3 {
  margin-bottom: 0.7rem;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.hero-text,
.section-heading p,
.split p,
.cta p {
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1.75;
}

.hero-text { max-width: 650px; }

.hero-actions {
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 2.8rem;
  padding: 0 1.1rem;
  font-weight: 750;
}

.button.primary {
  color: #021019;
  border-color: transparent;
  background: linear-gradient(135deg, #67e8f9, #22d3ee);
}

.button.secondary {
  color: var(--text);
  background: var(--subtle-button-bg);
}

.hero-panel { min-width: 0; }

.terminal {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 1.4rem;
  background: var(--terminal-bg);
  box-shadow: var(--shadow);
}

.terminal-bar {
  display: flex;
  gap: 0.45rem;
  padding: 1rem;
  border-bottom: 1px solid var(--line);
  background: var(--terminal-bar-bg);
}

.terminal-bar span {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.45);
}

pre {
  margin: 0;
  padding: 1.4rem;
  overflow: auto;
  color: var(--green);
  font-size: 0.95rem;
  line-height: 1.72;
}

.section { padding: 4rem 0; }
.section-heading {
  max-width: 760px;
  margin-bottom: 2rem;
}

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

.project-card,
.principles article,
.cta {
  border: 1px solid var(--line);
  border-radius: 1.35rem;
  background: var(--card);
  box-shadow: var(--card-shadow);
}

.project-card { padding: 1.25rem; }

.project-card.featured {
  grid-column: span 2;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  background:
    linear-gradient(135deg, rgba(34, 211, 238, 0.13), rgba(59, 130, 246, 0.04)),
    var(--card-strong);
}

.project-icon { font-size: 1.65rem; }

.project-topline {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 0.55rem;
}

.project-topline h3 {
  margin-bottom: 0;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 1.75rem;
  padding: 0.25rem 0.55rem;
  border: 1px solid rgba(34, 211, 238, 0.38);
  border-radius: 999px;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 800;
  line-height: 1;
}

.project-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: -0.2rem 0 0.85rem;
}

.project-meta img {
  display: block;
  height: 20px;
  max-width: 100%;
}

.project-card p,
.project-card li,
.principles p {
  color: var(--muted);
  line-height: 1.65;
}

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

.mini { font-size: 0.95rem; }

.links {
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
  color: var(--accent);
  font-weight: 750;
}

.split {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 2rem;
  align-items: center;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.tag-cloud span {
  padding: 0.75rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: var(--subtle-chip-bg);
}

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

.principles article { padding: 1.25rem; }

.cta {
  margin-top: 4rem;
  margin-bottom: 4rem;
  padding: clamp(1.5rem, 5vw, 3.5rem);
  text-align: center;
  background:
    radial-gradient(circle at 50% 0%, rgba(34, 211, 238, 0.15), transparent 22rem),
    var(--card);
}

.cta .button { margin-top: 1rem; }

.site-footer {
  justify-content: space-between;
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 3rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (max-width: 860px) {
  .site-header { align-items: center; }
  .nav a:not(.nav-button) { display: none; }
  .hero, .split { grid-template-columns: 1fr; }
  .hero { padding-top: 4rem; }
  .project-grid, .principles { grid-template-columns: 1fr; }
  .project-card.featured {
    grid-column: span 1;
    grid-template-columns: 1fr;
  }
  .site-footer {
    flex-direction: column;
    gap: 0.5rem;
    align-items: flex-start;
  }
}

@media (max-width: 520px) {
  .brand span:last-child { display: none; }
  .nav { gap: 0.5rem; }
}