/* ============================================================
   Ben Rippere — portfolio. Hand-built, no framework, no build step.
   Palette: deep slate + electric indigo/cyan (neuro × systems).
   ============================================================ */

:root {
  --bg:        #0a0d14;
  --bg-soft:   #10141e;
  --card:      #141a26;
  --card-edge: #20283a;
  --text:      #e8ecf4;
  --muted:     #9aa6bd;
  --faint:     #6b7691;
  --accent:    #6ea8fe;   /* indigo-cyan */
  --accent-2:  #8b7bff;   /* violet for ML tags */
  --fin:       #5fd0a8;   /* finance green */
  --sys:       #f0a868;   /* systems amber */
  --maxw:      1080px;
  --radius:    14px;
  --ease:      cubic-bezier(.22,.61,.36,1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(110,168,254,.10), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(139,123,255,.08), transparent 55%),
    var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.skip {
  position: absolute; left: -999px; top: 0;
  background: var(--accent); color: #061018; padding: .6rem 1rem; border-radius: 0 0 8px 0; z-index: 100;
}
.skip:focus { left: 0; }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  max-width: var(--maxw); margin: 0 auto; padding: 1rem 1.5rem;
  backdrop-filter: blur(10px);
  background: linear-gradient(to bottom, rgba(10,13,20,.85), rgba(10,13,20,.4));
}
.brand { font-weight: 800; letter-spacing: .5px; font-size: 1.15rem; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand .dot { color: var(--accent); }
.nav nav { display: flex; gap: 1.4rem; }
.nav nav a { color: var(--muted); font-size: .92rem; }
.nav nav a:hover { color: var(--text); text-decoration: none; }

/* ---------- layout ---------- */
main { max-width: var(--maxw); margin: 0 auto; padding: 0 1.5rem; }
.section { padding: 4.5rem 0; border-top: 1px solid var(--card-edge); }
.section-head { margin-bottom: 2rem; }
.section h2 { font-size: 1.9rem; margin: 0 0 .35rem; letter-spacing: -.01em; }
.muted { color: var(--muted); margin: 0; }
.accent { color: var(--accent); }

/* ---------- hero ---------- */
.hero { padding: 5rem 0 4rem; }
.eyebrow {
  text-transform: uppercase; letter-spacing: .18em; font-size: .76rem;
  color: var(--accent); margin: 0 0 1.1rem; font-weight: 600;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.4rem); line-height: 1.08;
  margin: 0 0 1.4rem; letter-spacing: -.02em; font-weight: 800;
}
.lede { font-size: 1.12rem; color: var(--muted); max-width: 60ch; margin: 0 0 2rem; }

.cta, .links { display: flex; flex-wrap: wrap; gap: .8rem; }
.btn {
  display: inline-block; padding: .72rem 1.25rem; border-radius: 10px;
  border: 1px solid var(--card-edge); color: var(--text); font-weight: 600; font-size: .95rem;
  background: var(--bg-soft); transition: transform .15s var(--ease), border-color .15s var(--ease), background .15s var(--ease);
}
.btn:hover { text-decoration: none; transform: translateY(-2px); border-color: var(--accent); }
.btn.primary { background: var(--accent); color: #061018; border-color: var(--accent); }
.btn.primary:hover { background: #8cbcff; }
.btn[aria-disabled="true"] { opacity: .5; cursor: not-allowed; }
.btn[aria-disabled="true"]:hover { transform: none; border-color: var(--card-edge); }

/* ---------- work grid ---------- */
.grid {
  display: grid; gap: 1.1rem;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}
.card {
  background: linear-gradient(180deg, var(--card), var(--bg-soft));
  border: 1px solid var(--card-edge); border-radius: var(--radius);
  padding: 1.4rem 1.4rem 1.5rem; display: flex; flex-direction: column;
  transition: transform .18s var(--ease), border-color .18s var(--ease), box-shadow .18s var(--ease);
}
.card:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: 0 12px 40px -18px rgba(110,168,254,.5); }
.card header { display: flex; align-items: center; justify-content: space-between; gap: .5rem; margin-bottom: .6rem; }
.card h3 { margin: 0; font-size: 1.18rem; }
.card p { color: var(--muted); margin: 0 0 1rem; font-size: .96rem; }
.card em { color: var(--text); font-style: normal; opacity: .9; }
.card strong { color: var(--text); }

.tag { font-size: .68rem; text-transform: uppercase; letter-spacing: .08em; padding: .25rem .55rem; border-radius: 999px; white-space: nowrap; font-weight: 700; }
.tag-ml  { background: rgba(139,123,255,.14); color: var(--accent-2); }
.tag-fin { background: rgba(95,208,168,.14); color: var(--fin); }
.tag-sys { background: rgba(240,168,104,.14); color: var(--sys); }

.stack { list-style: none; display: flex; flex-wrap: wrap; gap: .4rem; padding: 0; margin: 0 0 1.1rem; }
.stack li { font-size: .76rem; color: var(--faint); border: 1px solid var(--card-edge); border-radius: 6px; padding: .15rem .5rem; }

.card-link { margin-top: auto; font-weight: 600; font-size: .92rem; }
.card-ghost { border-style: dashed; justify-content: center; }
.card-ghost p { margin-bottom: .9rem; }

/* ---------- about ---------- */
.about-body { max-width: 70ch; }
.about-body p { color: var(--muted); margin: 0 0 1.1rem; }
.about-body em { color: var(--text); font-style: italic; }
.about-body strong { color: var(--text); }
.creds { list-style: none; padding: 0; margin: 1.8rem 0 0; display: grid; gap: .8rem; }
.creds li { color: var(--muted); padding-left: 1rem; border-left: 2px solid var(--accent); }
.creds strong { display: inline-block; min-width: 6.5rem; color: var(--accent); font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; }

/* ---------- building in public ---------- */
.public-rows { display: grid; gap: 1rem; }
.prow { display: grid; grid-template-columns: 7rem 1fr; gap: 1rem; align-items: start; padding: 1rem 0; border-bottom: 1px solid var(--card-edge); }
.prow:last-child { border-bottom: 0; }
.ptag { font-size: .72rem; text-transform: uppercase; letter-spacing: .1em; font-weight: 700; color: var(--accent); padding-top: .15rem; }
.prow p { margin: 0; color: var(--muted); }
.prow em { color: var(--text); font-style: italic; }

/* ---------- connect ---------- */
.connect .lede { margin-bottom: 1.6rem; }

/* ---------- footer ---------- */
.foot { max-width: var(--maxw); margin: 0 auto; padding: 2.5rem 1.5rem 3.5rem; border-top: 1px solid var(--card-edge); }
.foot p { color: var(--faint); font-size: .88rem; margin: 0; }
.foot a { color: var(--muted); }

/* ---------- responsive ---------- */
@media (max-width: 620px) {
  .nav nav { gap: .9rem; }
  .nav nav a { font-size: .82rem; }
  .prow { grid-template-columns: 1fr; gap: .3rem; }
  .section { padding: 3.2rem 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}