/* ── Reset & custom properties ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --warm-bg: #fdf6ec;
  --warm-accent: #e8875a;
  --warm-text: #2d2d2d;
  --warm-muted: #8a7060;

  --dark-bg: #0d0f12;
  --dark-accent: #4ade80;
  --dark-text: #e2e8f0;
  --dark-muted: #64748b;
  --dark-code-bg: #111318;

  --nav-height: 56px;
  --radius: 16px;
  --transition: 0.2s ease;
}

html { scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, sans-serif;
  line-height: 1.6;
}

/* ── Nav ── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: var(--dark-bg);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  gap: 1.5rem;
  z-index: 100;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

nav .logo {
  font-family: monospace;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--dark-text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

#status-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  display: inline-block;
  background: #ef4444; /* red — initial state */
  transition: background var(--transition);
}
#status-dot.green { background: #4ade80; }
#status-dot.amber { background: #f59e0b; }
#status-dot.red   { background: #ef4444; }

nav .links {
  display: flex;
  gap: 1rem;
  margin-left: auto;
  list-style: none;
}

nav .links a {
  color: var(--dark-muted);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color var(--transition);
}
nav .links a:hover,
nav .links a.active { color: var(--dark-text); }

nav .nav-github { opacity: 0.6; }
nav .nav-github:hover { opacity: 1; color: var(--dark-text); }

/* ── Hamburger button (hidden on desktop) ── */
.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  margin-left: auto;
}
.nav-burger span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--dark-muted);
  border-radius: 2px;
  transition: background var(--transition);
}
.nav-burger:hover span { background: var(--dark-text); }

/* ── Mobile nav ── */
@media (max-width: 700px) {
  .nav-burger { display: flex; }

  nav .links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0; right: 0;
    background: var(--dark-bg);
    flex-direction: column;
    gap: 0;
    margin: 0;
    padding: 0.5rem 0 1rem;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    z-index: 99;
  }
  nav .links li a {
    display: block;
    padding: 0.65rem 1.5rem;
    font-size: 1rem;
  }
  nav.nav-open .links {
    display: flex;
  }
  nav.nav-open .nav-burger span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
  nav.nav-open .nav-burger span:nth-child(2) { opacity: 0; }
  nav.nav-open .nav-burger span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
  .nav-burger span { transition: transform 0.2s ease, opacity 0.2s ease, background var(--transition); }
}

/* ── Sections ── */
section {
  padding: calc(var(--nav-height) + 4rem) 2rem 4rem;
  min-height: 100vh;
}
section:first-of-type { padding-top: calc(var(--nav-height) + 5rem); }

/* ── Accessibility ── */
:focus-visible { outline: 2px solid var(--warm-accent); outline-offset: 3px; }

/* ── Utility ── */
.container { max-width: 900px; margin: 0 auto; }
.null-value::after { content: "—"; opacity: 0.4; }
.hidden { display: none; }

/* Spacing helpers */
.mt-sm  { margin-top: 0.75rem; }
.mt-md  { margin-top: 1.5rem; }
.mt-lg  { margin-top: 3rem; }
.mb-md  { margin-bottom: 1.5rem; }
.mb-lg  { margin-bottom: 2.5rem; }

/* Text helpers */
.text-muted-warm { color: var(--warm-muted); }
.text-muted-dark { color: var(--dark-muted); }
.text-small      { font-size: 0.875rem; }
.text-xs         { font-size: 0.8rem; }
.text-italic     { font-style: italic; }
.text-right      { text-align: right; }
.text-mono       { font-family: monospace; }
.opacity-40      { opacity: 0.4; }
.text-lead       { font-size: 1.2rem; }

/* Flex helpers */
.flex            { display: flex; }
.flex-gap        { display: flex; gap: 1rem; }
.align-center    { align-items: center; }
.justify-between { justify-content: space-between; }

/* Live card inner layout */
.live-meta { display: flex; gap: 1rem; margin-top: 0.75rem; font-size: 0.8rem; opacity: 0.5; }
.live-label { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; opacity: 0.5; margin-bottom: 0.5rem; }