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

:root {
  --bg:        #0a0a0a;
  --bg-nav:    #0f0f0f;
  --green:     #00cc44;
  --green-dim: #008833;
  --green-hi:  #33ff77;
  --border:    #1a2a1a;
  --text:      #00cc44;
  --text-muted:#558855;
  --nav-width: 220px;
  --header-h:  56px;
  --font:      "Helvetica Neue", Helvetica, Arial, sans-serif;
  --lh:        1.75;
  --max-prose: 68ch;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: var(--lh);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--green-hi);
  text-decoration: none;
  border-bottom: 1px solid var(--green-dim);
  transition: color .15s, border-color .15s;
}
a:hover { color: #fff; border-color: var(--green-hi); }

/* ── Header ─────────────────────────────────────────────── */
#header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: var(--bg-nav);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  z-index: 100;
  gap: 1rem;
}

#header .logo {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--green-hi);
  border: none;
  white-space: nowrap;
}

#header .tagline {
  font-size: .75rem;
  color: var(--text-muted);
  letter-spacing: .08em;
  border-left: 1px solid var(--border);
  padding-left: 1rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* hamburger — mobile only */
#menu-toggle {
  display: none;
  margin-left: auto;
  background: none;
  border: 1px solid var(--green-dim);
  color: var(--green);
  width: 36px; height: 36px;
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  border-radius: 2px;
  transition: border-color .15s, color .15s;
}
#menu-toggle:hover { border-color: var(--green-hi); color: var(--green-hi); }

/* ── Layout ──────────────────────────────────────────────── */
#layout {
  display: flex;
  padding-top: var(--header-h);
  min-height: 100vh;
}

/* ── Nav ─────────────────────────────────────────────────── */
#nav {
  position: fixed;
  top: var(--header-h);
  left: 0;
  width: var(--nav-width);
  height: calc(100vh - var(--header-h));
  overflow-y: auto;
  background: var(--bg-nav);
  border-right: 1px solid var(--border);
  padding: 1.5rem 0;
  z-index: 90;
  transition: transform .25s ease;
}

#nav ul { list-style: none; }

#nav .nav-section { margin-bottom: 1.5rem; }

#nav .nav-label {
  font-size: .65rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 0 1.25rem .4rem;
  display: block;
}

#nav a {
  display: block;
  padding: .42rem 1.25rem;
  font-size: .875rem;
  color: var(--text-muted);
  border: none;
  letter-spacing: .04em;
  transition: color .12s, background .12s, padding-left .12s;
  border-left: 2px solid transparent;
}
#nav a:hover,
#nav a.active {
  color: var(--green-hi);
  background: rgba(0,204,68,.05);
  padding-left: 1.6rem;
  border-left-color: var(--green-hi);
}

/* ── Main ────────────────────────────────────────────────── */
#main {
  margin-left: var(--nav-width);
  flex: 1;
  padding: 3rem 2.5rem;
}

/* ── Content sections ───────────────────────────────────── */
.page-section {
  display: none;
  max-width: var(--max-prose);
  animation: fadein .2s ease;
}
.page-section.active { display: block; }

@keyframes fadein {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

h1 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--green-hi);
  margin-bottom: 1.5rem;
  padding-bottom: .6rem;
  border-bottom: 1px solid var(--border);
}

h2 {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--green-hi);
  margin: 2rem 0 .75rem;
}

p { margin-bottom: 1rem; font-size: .9375rem; }

ul, ol { padding-left: 1.4rem; margin-bottom: 1rem; }
li { margin-bottom: .3rem; font-size: .9375rem; }

code, pre {
  font-family: "Courier New", Courier, monospace;
  font-size: .85rem;
  background: #0f1a0f;
  border: 1px solid var(--border);
  border-radius: 2px;
}
code { padding: .1em .35em; }
pre  { padding: 1rem 1.25rem; overflow-x: auto; margin-bottom: 1rem; }

.contact-list { list-style: none; padding: 0; }
.contact-list li {
  padding: .5rem 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: .75rem;
}
.contact-list .label {
  width: 80px;
  color: var(--text-muted);
  font-size: .8rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  flex-shrink: 0;
}

/* ── Footer ──────────────────────────────────────────────── */
#footer {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: .75rem;
  color: var(--text-muted);
  letter-spacing: .06em;
}

/* ── Mobile ──────────────────────────────────────────────── */
@media (max-width: 720px) {
  :root { --nav-width: 200px; }

  #menu-toggle { display: block; }

  #nav { transform: translateX(-100%); }
  #nav.open {
    transform: translateX(0);
    box-shadow: 4px 0 24px rgba(0,0,0,.6);
  }

  #main { margin-left: 0; padding: 2rem 1.25rem; }

  #overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 89;
  }
  #overlay.show { display: block; }
}

@media (max-width: 400px) {
  #main { padding: 1.5rem 1rem; }
}