:root {
  color-scheme: dark;
  --color-bg: #0a0d0f;
  --color-bg-elevated: #101519;
  --color-surface: #151b20;
  --color-surface-hover: #1a2228;
  --color-border: #263039;
  --color-border-strong: #34414b;
  --color-text: #f5f7f8;
  --color-text-muted: #95a2ab;
  --color-text-subtle: #6f7b83;
  --color-accent: #b8f33d;
  --color-accent-strong: #9bd41d;
  --color-accent-soft: rgba(184, 243, 61, 0.12);
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --radius-sm: 0.625rem;
  --radius-md: 0.875rem;
  --radius-lg: 1.25rem;
  --radius-pill: 999px;
  --sidebar-width: 17rem;
  --content-width: 90rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --transition-fast: 160ms ease;
}

*, *::before, *::after { box-sizing: border-box; }
html { background: var(--color-bg); font-family: var(--font-sans); scroll-behavior: smooth; }
body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background: radial-gradient(circle at 72% -10%, rgba(184, 243, 61, 0.08), transparent 28rem), var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}
a { color: inherit; }
a:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 3px; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: var(--space-4); font-size: clamp(2.5rem, 5vw, 4.4rem); line-height: 1; letter-spacing: -0.055em; }
h2 { margin-bottom: var(--space-2); font-size: clamp(1.5rem, 2.5vw, 2rem); letter-spacing: -0.035em; }
code { color: var(--color-accent); }

.app-shell { min-height: 100vh; }
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 10;
  display: flex;
  width: var(--sidebar-width);
  flex-direction: column;
  gap: var(--space-8);
  padding: var(--space-6);
  border-right: 1px solid var(--color-border);
  background: rgba(16, 21, 25, 0.92);
  backdrop-filter: blur(18px);
}
.brand { display: flex; align-items: center; gap: var(--space-3); text-decoration: none; }
.brand__mark {
  display: grid;
  width: 2.75rem;
  height: 2.75rem;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid rgba(184, 243, 61, 0.26);
  border-radius: var(--radius-md);
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-size: 1.35rem;
}
.brand strong, .brand small { display: block; }
.brand strong { letter-spacing: -0.02em; }
.brand small { margin-top: 0.1rem; color: var(--color-text-muted); font-size: 0.68rem; }
.navigation { display: flex; }
.navigation--sidebar { flex: 1; flex-direction: column; gap: var(--space-2); }
.navigation__link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 2.9rem;
  padding: 0 var(--space-4);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-size: 0.875rem;
  font-weight: 650;
  text-decoration: none;
  transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}
.navigation__link:hover { background: var(--color-surface-hover); color: var(--color-text); }
.navigation__link.is-active { border-color: rgba(184, 243, 61, 0.2); background: var(--color-accent-soft); color: var(--color-accent); }
.sidebar__status {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-elevated);
}
.sidebar__status strong, .sidebar__status span { display: block; }
.sidebar__status strong { margin-bottom: 0.25rem; font-size: 0.75rem; }
.sidebar__status span { color: var(--color-text-subtle); font-size: 0.68rem; line-height: 1.45; }
.status-dot { width: 0.5rem; height: 0.5rem; flex: 0 0 auto; margin-top: 0.2rem; border-radius: 50%; background: var(--color-accent); box-shadow: 0 0 0 5px var(--color-accent-soft); }

.app-shell__content { min-height: 100vh; margin-left: var(--sidebar-width); }
.page-container { width: min(100%, var(--content-width)); margin: 0 auto; padding: clamp(2rem, 5vw, 5rem); }
.page-stack { display: grid; gap: clamp(2rem, 5vw, 4.5rem); }
.page-header { max-width: 48rem; }
.eyebrow { margin-bottom: var(--space-4); color: var(--color-accent); font-size: 0.75rem; font-weight: 800; letter-spacing: 0.16em; text-transform: uppercase; }
.page-header__description, .about-card > p:last-child { max-width: 38rem; margin-bottom: 0; color: var(--color-text-muted); font-size: 1.125rem; line-height: 1.65; }
.section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-4); margin-bottom: var(--space-4); }
.section-heading h2, .section-heading p { margin: 0; }
.muted-text { color: var(--color-text-muted); font-size: 0.875rem; }
.project-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr)); gap: var(--space-3); }
.project-card, .empty-state, .about-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg-elevated);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.22);
}
.project-card { display: flex; min-height: 13rem; flex-direction: column; justify-content: space-between; padding: var(--space-5); text-decoration: none; transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast); }
.project-card:hover { border-color: var(--color-border-strong); background: var(--color-surface-hover); transform: translateY(-2px); }
.project-card h3 { margin-bottom: var(--space-2); font-size: 1.25rem; }
.project-card p { color: var(--color-text-muted); }
.project-type { color: var(--color-accent); font-size: 0.75rem; font-weight: 800; letter-spacing: 0.08em; text-transform: uppercase; }
.project-link { color: var(--color-text); font-size: 0.875rem; font-weight: 700; }
.empty-state { grid-column: 1 / -1; display: grid; min-height: 22rem; place-items: center; align-content: center; padding: var(--space-10); text-align: center; }
.empty-state p { max-width: 32rem; margin-bottom: 0; color: var(--color-text-muted); line-height: 1.6; }
.empty-state h3 { margin-bottom: var(--space-2); }
.about-card { max-width: 48rem; padding: clamp(1.5rem, 4vw, 2.5rem); }
.about-card h2 { margin-bottom: var(--space-3); }

.mobile-header, .navigation--bottom { display: none; }
@media (max-width: 840px) {
  .sidebar { display: none; }
  .app-shell__content { margin-left: 0; }
  .mobile-header { display: flex; align-items: center; justify-content: space-between; padding: var(--space-4) var(--space-5); border-bottom: 1px solid var(--color-border); background: rgba(10, 13, 15, 0.88); backdrop-filter: blur(16px); }
  .mobile-header .brand__mark { width: 2.25rem; height: 2.25rem; }
  .mobile-profile-link { display: grid; width: 2.75rem; height: 2.75rem; place-items: center; border: 1px solid var(--color-border); border-radius: var(--radius-md); color: var(--color-text-muted); text-decoration: none; }
  .page-container { padding: var(--space-8) var(--space-5) 8.5rem; }
  .navigation--bottom { position: fixed; inset: auto 0 0; z-index: 30; display: grid; grid-template-columns: repeat(2, minmax(5rem, 1fr)); padding: var(--space-2); border-top: 1px solid var(--color-border); background: rgba(16, 21, 25, 0.96); backdrop-filter: blur(18px); }
  .navigation--bottom .navigation__link { flex-direction: column; justify-content: center; gap: 0.25rem; min-height: 3.8rem; padding: var(--space-2); font-size: 0.65rem; }
}
@media (max-width: 560px) {
  .section-heading { display: block; }
  .section-heading > p { margin-top: var(--space-2); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}