/* ============================================================
   Matt Hagen — portfolio
   Palette:  ink #0A0E14 · slate #141A24 · fog #8B98A9
             paper #E6EDF3 · signal #4DD6C1 · ember #F2A65A
   Type:     Space Grotesk (display) · Inter (body) · JetBrains Mono (data)
   ============================================================ */

:root {
  --ink:    #0A0E14;
  --slate:  #141A24;
  --line:   #232B38;
  --fog:    #8B98A9;
  --paper:  #E6EDF3;
  --signal: #4DD6C1;
  --ember:  #F2A65A;

  --max: 1080px;
  --gap: clamp(1.5rem, 4vw, 4rem);
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

body {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* subtle grid backdrop */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: .18;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 75%);
  pointer-events: none;
  z-index: 0;
}

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gap); position: relative; z-index: 1; }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(10, 14, 20, .72);
  border-bottom: 1px solid var(--line);
}
.nav__inner {
  max-width: var(--max); margin: 0 auto; padding: 1rem var(--gap);
  display: flex; align-items: center; justify-content: space-between;
}
.nav__brand {
  font-family: var(--font-mono);
  font-size: .95rem; font-weight: 600; letter-spacing: -.02em;
  color: var(--paper); text-decoration: none;
}
.nav__brand span { color: var(--signal); }
.nav__links { display: flex; gap: 1.75rem; list-style: none; }
.nav__links a {
  font-family: var(--font-mono); font-size: .82rem;
  color: var(--fog); text-decoration: none; transition: color .2s;
}
.nav__links a:hover, .nav__links a[aria-current="page"] { color: var(--signal); }
.nav__toggle { display: none; background: none; border: 0; color: var(--paper); cursor: pointer; font-size: 1.4rem; }

@media (max-width: 640px) {
  .nav__links {
    position: absolute; top: 100%; right: 0; left: 0;
    flex-direction: column; gap: 0;
    background: var(--slate); border-bottom: 1px solid var(--line);
    max-height: 0; overflow: hidden; transition: max-height .3s ease;
  }
  .nav__links.open { max-height: 320px; }
  .nav__links li { border-top: 1px solid var(--line); }
  .nav__links a { display: block; padding: 1rem var(--gap); }
  .nav__toggle { display: block; }
}

/* ---------- hero / terminal ---------- */
.hero { padding: clamp(3.5rem, 10vw, 7rem) 0 clamp(2.5rem, 6vw, 4rem); }
.eyebrow {
  font-family: var(--font-mono); font-size: .78rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--signal); margin-bottom: 1.25rem;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 7vw, 4.6rem);
  line-height: 1.02; font-weight: 700; letter-spacing: -.03em;
  margin-bottom: 1.5rem;
}
.hero h1 em { font-style: normal; color: var(--signal); }
.hero__lede { max-width: 52ch; color: var(--fog); font-size: 1.12rem; }

.terminal {
  margin-top: 2.5rem;
  border: 1px solid var(--line); border-radius: 10px;
  background: var(--slate); overflow: hidden;
  box-shadow: 0 24px 60px -30px rgba(0,0,0,.8);
}
.terminal__bar {
  display: flex; align-items: center; gap: .5rem;
  padding: .75rem 1rem; border-bottom: 1px solid var(--line);
  font-family: var(--font-mono); font-size: .75rem; color: var(--fog);
}
.dot { width: 11px; height: 11px; border-radius: 50%; }
.dot--r { background: #FF5F56; } .dot--y { background: #FFBD2E; } .dot--g { background: #27C93F; }
.terminal__title { margin-left: .5rem; }
.terminal__body { padding: 1.5rem; font-family: var(--font-mono); font-size: .88rem; line-height: 1.9; }
.terminal__body .k { color: var(--ember); }
.terminal__body .s { color: var(--signal); }
.terminal__body .c { color: var(--fog); }
.terminal__prompt { color: var(--signal); }
.cursor { display: inline-block; width: 9px; height: 1.1em; background: var(--signal); vertical-align: -2px; animation: blink 1.1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* ---------- sections ---------- */
.section { padding: clamp(3rem, 8vw, 5.5rem) 0; border-top: 1px solid var(--line); }
.section__head { display: flex; align-items: baseline; gap: 1rem; margin-bottom: 2.5rem; }
.section__num { font-family: var(--font-mono); font-size: .82rem; color: var(--signal); }
.section__title { font-family: var(--font-display); font-size: clamp(1.5rem, 4vw, 2.2rem); font-weight: 600; letter-spacing: -.02em; }

/* ---------- cards ---------- */
.grid { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.card {
  border: 1px solid var(--line); border-radius: 10px;
  background: linear-gradient(180deg, var(--slate), var(--ink));
  padding: 1.5rem; transition: transform .2s, border-color .2s;
  display: flex; flex-direction: column; gap: .75rem;
}
.card:hover { transform: translateY(-4px); border-color: var(--signal); }
.card__tag { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ember); }
.card__title { font-family: var(--font-display); font-size: 1.25rem; font-weight: 600; }
.card__desc { color: var(--fog); font-size: .95rem; flex: 1; }
.card__links { display: flex; gap: 1rem; flex-wrap: wrap; }
.card__links a { font-family: var(--font-mono); font-size: .82rem; color: var(--signal); text-decoration: none; }
.card__links a:hover { text-decoration: underline; }
.card__note { font-family: var(--font-mono); font-size: .72rem; color: var(--ember); border-top: 1px dashed var(--line); padding-top: .6rem; }

/* ---------- prose (writing / about) ---------- */
.prose { max-width: 68ch; }
.prose p { margin-bottom: 1.25rem; color: var(--paper); }
.prose p.muted { color: var(--fog); }
.prose h3 { font-family: var(--font-display); font-size: 1.3rem; margin: 2rem 0 .75rem; }
.prose a { color: var(--signal); }

.stack { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1rem; }
.chip {
  font-family: var(--font-mono); font-size: .78rem; color: var(--paper);
  border: 1px solid var(--line); border-radius: 999px; padding: .35rem .85rem;
  background: var(--slate);
}

/* ---------- embed ---------- */
.embed {
  display: flex; justify-content: center;
  border: 1px solid var(--line); border-radius: 10px;
  background: var(--slate); padding: 1.5rem; overflow: hidden;
}
.embed iframe { max-width: 100%; border-radius: 6px; }
@media (max-width: 560px) {
  .embed { padding: 1rem 0; }
  /* the FB iframe is a fixed 500px; scale it down to fit small screens */
  .embed iframe { transform: scale(.7); transform-origin: top center; margin-bottom: -170px; }
}

/* ---------- contact ---------- */
.contact__links { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1.5rem; }
.btn {
  font-family: var(--font-mono); font-size: .88rem;
  padding: .8rem 1.4rem; border-radius: 8px; text-decoration: none;
  border: 1px solid var(--line); color: var(--paper); transition: all .2s;
}
.btn:hover { border-color: var(--signal); color: var(--signal); }
.btn--primary { background: var(--signal); color: var(--ink); border-color: var(--signal); font-weight: 600; }
.btn--primary:hover { background: transparent; color: var(--signal); }

/* ---------- footer ---------- */
.footer {
  border-top: 1px solid var(--line); padding: 2.5rem 0;
  font-family: var(--font-mono); font-size: .8rem; color: var(--fog);
}
.footer__inner { max-width: var(--max); margin: 0 auto; padding: 0 var(--gap); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }

/* reveal on scroll */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s, transform .6s; }
.reveal.in { opacity: 1; transform: none; }

/* focus visibility */
a:focus-visible, button:focus-visible, .btn:focus-visible {
  outline: 2px solid var(--signal); outline-offset: 3px; border-radius: 4px;
}