/* ============================================================
   Portfolio Hub — design system
   Clean, technical, restrained. Dark "engineering" aesthetic.
   Zero dependencies. Single source of truth for tokens.
   ============================================================ */

:root {
  /* palette */
  --bg:        #0b0e14;
  --bg-soft:   #10141d;
  --panel:     #141926;
  --panel-2:   #1a2030;
  --border:    #222b3d;
  --border-lit:#2e3a52;

  --text:      #e6e9ef;
  --muted:     #8b93a7;
  --faint:     #5c6478;

  --accent:    #4f8cff;
  --accent-2:  #a06bff;
  --accent-soft: rgba(79, 140, 255, 0.12);

  --good:      #3fb96b;
  --warn:      #e0a94a;

  /* type */
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "JetBrains Mono", "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;

  /* space + shape */
  --container: 1080px;
  --radius: 14px;
  --radius-sm: 9px;
  --gap: 24px;

  --shadow: 0 10px 40px -12px rgba(0,0,0,0.6);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 0.5em; font-weight: 650; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }

/* subtle top glow */
body::before {
  content: "";
  position: fixed;
  inset: 0 0 auto 0;
  height: 480px;
  background: radial-gradient(1200px 480px at 50% -180px, rgba(79,140,255,0.14), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* ---------- layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}
.section { padding: 72px 0; }
.section-tight { padding: 48px 0; }
.divider { height: 1px; background: var(--border); border: 0; margin: 0; }

/* ---------- nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11,14,20,0.72);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 62px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 1.05rem;
}
.brand .mark {
  width: 26px; height: 26px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: grid; place-items: center;
  font-family: var(--mono);
  font-size: 13px; font-weight: 700; color: #fff;
}
.nav-links { display: flex; gap: 6px; align-items: center; }
.nav-links a {
  color: var(--muted);
  font-size: 0.94rem;
  padding: 8px 12px;
  border-radius: 8px;
  transition: color .15s, background .15s;
}
.nav-links a:hover { color: var(--text); background: var(--panel); }
.nav-links a.active { color: var(--text); }

/* ---------- hero ---------- */
.hero { padding: 96px 0 40px; }
.eyebrow {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  max-width: 16ch;
  margin-bottom: 22px;
}
.hero .lede {
  font-size: clamp(1.05rem, 2vw, 1.28rem);
  color: var(--muted);
  max-width: 60ch;
  margin-bottom: 30px;
}
.gradient-text {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- buttons ---------- */
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 11px 18px;
  border-radius: 10px;
  border: 1px solid var(--border-lit);
  color: var(--text);
  background: var(--panel);
  transition: transform .12s, border-color .15s, background .15s;
  cursor: pointer;
}
.btn:hover { transform: translateY(-1px); border-color: var(--accent); }
.btn-primary {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  border-color: transparent;
  color: #fff;
}
.btn-primary:hover { border-color: transparent; filter: brightness(1.06); }
.btn .arrow { transition: transform .15s; }
.btn:hover .arrow { transform: translateX(3px); }
.btn-ghost { background: transparent; }

/* ---------- cards / product grid ---------- */
.grid { display: grid; gap: var(--gap); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: linear-gradient(180deg, var(--panel), var(--bg-soft));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color .18s, transform .18s;
  position: relative;
  overflow: hidden;
}
.card:hover { border-color: var(--border-lit); transform: translateY(-2px); }
.card .kicker {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--faint);
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}
.card h3 { font-size: 1.5rem; margin-bottom: 8px; }
.card .card-sub { color: var(--muted); margin-bottom: 20px; }
.card .card-foot {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; flex-wrap: wrap; margin-top: 8px;
}

/* traction tag */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--mono);
  font-size: 0.78rem;
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid var(--border-lit);
  color: var(--muted);
  background: var(--panel-2);
}
.tag .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--good); box-shadow: 0 0 8px var(--good); }
.tag .dot.warm { background: var(--warn); box-shadow: 0 0 8px var(--warn); }
.tag.accent { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); }

/* ---------- browser frame (demo preview) ---------- */
.frame {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
  box-shadow: var(--shadow);
}
.frame-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 11px 14px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--border);
}
.frame-bar .dots { display: flex; gap: 6px; }
.frame-bar .dots i { width: 11px; height: 11px; border-radius: 50%; background: var(--border-lit); display: block; }
.frame-bar .url {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--faint);
  margin-left: 8px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.frame-body {
  min-height: 260px;
  display: grid;
  place-items: center;
  padding: 40px;
  text-align: center;
  background:
    linear-gradient(180deg, rgba(79,140,255,0.05), transparent),
    var(--bg-soft);
}
.frame-body .placeholder-note {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--faint);
}

/* ---------- case study ---------- */
.cs-header { padding: 88px 0 24px; }
.cs-title { font-size: clamp(2rem, 4vw, 2.8rem); }
.cs-meta { display: flex; gap: 10px; flex-wrap: wrap; margin: 18px 0 4px; }

.step {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 22px;
  padding: 34px 0;
  border-top: 1px solid var(--border);
}
.step:first-of-type { border-top: 0; }
.step .num {
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--accent);
  border: 1px solid var(--border-lit);
  border-radius: 10px;
  width: 44px; height: 44px;
  display: grid; place-items: center;
}
.step h3 { font-size: 1.35rem; }
.step .step-body { color: var(--muted); }
.step .step-body strong { color: var(--text); font-weight: 600; }

/* feature list — flow layout so inline <strong> labels + text stay on one run */
.feature-list { list-style: none; padding: 0; margin: 14px 0 0; display: grid; gap: 12px; }
.feature-list li {
  position: relative;
  padding-left: 22px;
  color: var(--muted);
}
.feature-list li strong { color: var(--text); font-weight: 600; }
.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px; height: 8px;
  border-radius: 2px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

/* code chip inline */
code, .mono { font-family: var(--mono); font-size: 0.9em; }
:not(pre) > code {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1px 6px;
  color: var(--text);
  font-size: 0.86em;
}

/* ---------- roadmap ---------- */
.roadmap-card { position: relative; }
.roadmap-card .status {
  position: absolute; top: 22px; right: 22px;
  font-family: var(--mono); font-size: 0.72rem;
  color: var(--faint); letter-spacing: 0.05em; text-transform: uppercase;
}
.roadmap-card .organ-code {
  font-family: var(--mono);
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  margin-bottom: 6px;
}
.shipped { opacity: 1; }
.planned { opacity: 0.86; }
.planned .organ-code {
  background: none; color: var(--faint); -webkit-text-fill-color: var(--faint);
}

/* ---------- footnote / GUTS ---------- */
.footnote {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 30px;
  color: var(--muted);
  font-size: 0.98rem;
}
.footnote h3 { color: var(--text); font-size: 1.15rem; }

/* ---------- prose (about) ---------- */
.prose { max-width: 68ch; }
.prose h2 { margin-top: 40px; font-size: 1.5rem; }
.prose ul { color: var(--muted); padding-left: 22px; }
.prose li { margin-bottom: 8px; }
.contact-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 20px; }

/* ---------- footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  color: var(--faint);
  font-size: 0.88rem;
}
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; }
.footer a { color: var(--muted); }
.footer a:hover { color: var(--text); }

/* ---------- utility ---------- */
.center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.section-label {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 26px;
}

/* ---------- responsive ---------- */
@media (max-width: 820px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .nav-links a:not(.btn) { display: none; }
  .nav-links a.btn { display: inline-flex; }
  .hero { padding: 64px 0 24px; }
  .step { grid-template-columns: 1fr; gap: 10px; }
  .step .num { display: none; }
}