/* hackz.blog — design system
   Dark, technical, terminal-tinged, polished. No external deps. */

:root {
  --bg:        #0a0c10;
  --bg-elev:   #11151c;
  --bg-elev2:  #161c25;
  --border:    #232b37;
  --border-2:  #2e3745;
  --text:      #e8edf3;
  --muted:     #96a3b4;
  --faint:     #64707f;
  --accent:    #4ade80;   /* signal green */
  --accent-2:  #38bdf8;   /* sky, used sparingly */
  --danger:    #f87171;
  --warn:      #fbbf24;
  --glow:      0 0 0 1px rgba(74,222,128,.35), 0 8px 40px -12px rgba(74,222,128,.45);
  --radius:    12px;
  --radius-lg: 18px;
  --maxw:      1140px;
  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* backdrop grid + glow */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 500px at 78% -8%, rgba(56,189,248,.10), transparent 60%),
    radial-gradient(1100px 620px at 12% -6%, rgba(74,222,128,.12), transparent 55%);
  pointer-events: none;
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255,255,255,.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.022) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, #000 0%, transparent 70%);
  pointer-events: none;
}

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

h1, h2, h3, h4 { line-height: 1.15; letter-spacing: -.02em; margin: 0 0 .5em; }
h1 { font-size: clamp(2.1rem, 5.2vw, 3.6rem); font-weight: 800; }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.35rem); font-weight: 750; }
h3 { font-size: 1.22rem; font-weight: 700; }
p  { margin: 0 0 1rem; color: var(--muted); }
.lead { font-size: 1.2rem; color: #c3cdd9; max-width: 60ch; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
section { padding: 84px 0; }
.section-tight { padding: 56px 0; }

.mono { font-family: var(--font-mono); }
.accent { color: var(--accent); }
.eyebrow {
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.eyebrow::before { content: ""; width: 22px; height: 1px; background: var(--accent); opacity: .7; }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(10,12,16,.72);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto;
  display: flex; align-items: center; gap: 24px;
  padding: 14px 24px;
}
.brand {
  font-family: var(--font-mono);
  font-weight: 800; font-size: 1.15rem;
  color: var(--text); text-decoration: none;
  display: inline-flex; align-items: center; gap: 2px;
}
.brand:hover { text-decoration: none; }
.brand .b-accent { color: var(--accent); }
.brand .cursor { color: var(--accent); animation: blink 1.1s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }
.nav-links { display: flex; gap: 6px; margin-left: auto; align-items: center; }
.nav-links a {
  color: var(--muted); padding: 8px 12px; border-radius: 8px;
  font-size: .96rem; font-weight: 500;
}
.nav-links a:hover { color: var(--text); background: var(--bg-elev); text-decoration: none; }
.nav-links a.active { color: var(--text); }
.nav-toggle { display: none; background: none; border: 0; color: var(--text); cursor: pointer; padding: 6px; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--font-sans); font-weight: 650; font-size: .98rem;
  padding: 11px 20px; border-radius: 10px;
  border: 1px solid transparent; cursor: pointer;
  transition: transform .12s ease, box-shadow .2s ease, background .2s ease, border-color .2s;
  text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: #06210f; box-shadow: 0 6px 24px -8px rgba(74,222,128,.6); }
.btn-primary:hover { box-shadow: 0 10px 32px -8px rgba(74,222,128,.8); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border-2); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); background: rgba(74,222,128,.05); }
.btn-sm { padding: 8px 15px; font-size: .9rem; }

/* ---------- hero ---------- */
.hero { padding: 92px 0 64px; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 52px; align-items: center; }
.hero h1 { margin-bottom: 20px; }
.hero h1 .grad {
  background: linear-gradient(100deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .lead { margin-bottom: 30px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 26px; }
.hero-meta { display: flex; gap: 26px; flex-wrap: wrap; color: var(--faint); font-size: .9rem; font-family: var(--font-mono); }
.hero-meta b { color: var(--text); font-weight: 700; }

/* terminal card */
.terminal {
  background: linear-gradient(180deg, #0d1219, #0b0f15);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  box-shadow: 0 30px 80px -30px rgba(0,0,0,.8), var(--glow);
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: .86rem;
}
.term-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 16px; border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,.02);
}
.term-dot { width: 11px; height: 11px; border-radius: 50%; }
.d-r { background: #ff5f56; } .d-y { background: #ffbd2e; } .d-g { background: #27c93f; }
.term-title { margin-left: 8px; color: var(--faint); font-size: .78rem; }
.term-body { padding: 18px 18px 22px; line-height: 1.85; }
.term-body .cmd { color: var(--text); }
.term-body .pr { color: var(--accent); }
.term-body .ok { color: var(--accent); }
.term-body .hi { color: var(--warn); }
.term-body .cr { color: var(--danger); }
.term-body .mut { color: var(--faint); }
.term-body .path { color: var(--accent-2); }

/* ---------- cards / grids ---------- */
.grid { display: grid; gap: 22px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: linear-gradient(180deg, var(--bg-elev), var(--bg));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: transform .16s ease, border-color .2s ease, box-shadow .2s ease;
}
.card:hover { transform: translateY(-3px); border-color: var(--border-2); box-shadow: 0 18px 44px -24px rgba(0,0,0,.9); }
.card .ico {
  width: 42px; height: 42px; border-radius: 10px;
  display: grid; place-items: center; margin-bottom: 16px;
  background: rgba(74,222,128,.08); border: 1px solid rgba(74,222,128,.22);
  color: var(--accent); font-family: var(--font-mono); font-weight: 800;
}
.card h3 { margin-bottom: 8px; }
.card p { margin-bottom: 0; font-size: .98rem; }

.pill {
  display: inline-block; font-family: var(--font-mono); font-size: .74rem;
  padding: 3px 10px; border-radius: 999px; letter-spacing: .04em;
  background: rgba(56,189,248,.09); border: 1px solid rgba(56,189,248,.25); color: var(--accent-2);
}
.pill.green { background: rgba(74,222,128,.09); border-color: rgba(74,222,128,.28); color: var(--accent); }

/* section heading block */
.sec-head { max-width: 62ch; margin-bottom: 44px; }
.sec-head.center { margin-left: auto; margin-right: auto; text-align: center; }

/* stat strip */
.stats { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; }
.stat { text-align: center; padding: 22px 14px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg-elev); }
.stat .n { font-family: var(--font-mono); font-size: 1.9rem; font-weight: 800; color: var(--text); }
.stat .l { font-size: .84rem; color: var(--muted); margin-top: 4px; }

/* feature list */
.flist { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.flist li { display: flex; gap: 12px; align-items: flex-start; color: var(--muted); }
.flist li::before { content: "▹"; color: var(--accent); font-family: var(--font-mono); margin-top: 1px; }
.flist li b { color: var(--text); font-weight: 650; }

/* split feature block */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.split.rev .split-media { order: 2; }

/* process steps */
.steps { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; counter-reset: step; }
.step { position: relative; padding: 24px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg-elev); }
.step .num { font-family: var(--font-mono); color: var(--accent); font-weight: 800; font-size: .9rem; }
.step h3 { font-size: 1.05rem; margin: 8px 0 6px; }
.step p { font-size: .92rem; margin: 0; }

/* CTA band */
.cta-band {
  text-align: center;
  background: linear-gradient(140deg, rgba(74,222,128,.09), rgba(56,189,248,.06));
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  padding: 56px 32px;
}
.cta-band h2 { margin-bottom: 12px; }
.cta-band p { max-width: 52ch; margin: 0 auto 26px; }

/* ---------- pricing ---------- */
.tiers { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; align-items: stretch; }
.tier { display: flex; flex-direction: column; background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 30px; }
.tier.feature { border-color: var(--accent); box-shadow: 0 0 0 1px rgba(74,222,128,.25), 0 24px 60px -30px rgba(74,222,128,.4); }
.tier .tname { font-family: var(--font-mono); color: var(--accent); font-size: .9rem; letter-spacing: .08em; text-transform: uppercase; }
.tier .tprice { font-size: 1.5rem; font-weight: 800; margin: 10px 0 4px; }
.tier .tprice span { font-size: .95rem; color: var(--muted); font-weight: 500; }
.tier .flist { margin: 18px 0 24px; }
.tier .btn { margin-top: auto; justify-content: center; }

/* ---------- blog ---------- */
.post-list { display: grid; gap: 20px; }
.post-card {
  display: block; padding: 26px; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-elev); transition: border-color .2s, transform .16s;
}
.post-card:hover { text-decoration: none; border-color: var(--accent); transform: translateY(-2px); }
.post-meta { font-family: var(--font-mono); font-size: .78rem; color: var(--faint); display: flex; gap: 12px; margin-bottom: 10px; flex-wrap: wrap; }
.post-card h3 { color: var(--text); margin-bottom: 8px; }
.post-card p { margin: 0; }

article.prose { max-width: 76ch; margin: 0 auto; }
article.prose h2 { margin-top: 2em; }
article.prose h3 { margin-top: 1.6em; }
article.prose p, article.prose li { color: #c3cdd9; }
article.prose ul, article.prose ol { padding-left: 1.3em; }
article.prose li { margin-bottom: .4em; }
article.prose code {
  font-family: var(--font-mono); font-size: .88em;
  background: var(--bg-elev2); border: 1px solid var(--border);
  padding: 1px 6px; border-radius: 6px; color: var(--accent);
}
article.prose pre {
  background: #0c1118; border: 1px solid var(--border-2); border-radius: var(--radius);
  padding: 18px; overflow-x: auto; font-family: var(--font-mono); font-size: .86rem; line-height: 1.7;
}
article.prose pre code { background: none; border: 0; padding: 0; color: #d5deea; }
article.prose blockquote {
  border-left: 3px solid var(--accent); margin: 1.4em 0; padding: 4px 0 4px 18px; color: var(--muted);
}
.post-hero { text-align: center; padding: 64px 0 36px; border-bottom: 1px solid var(--border); margin-bottom: 44px; }

/* ---------- forms ---------- */
.form { display: grid; gap: 16px; max-width: 620px; }
.field label { display: block; font-size: .88rem; color: var(--muted); margin-bottom: 6px; font-weight: 600; }
.field input, .field textarea, .field select {
  width: 100%; background: var(--bg-elev); border: 1px solid var(--border-2); color: var(--text);
  border-radius: 10px; padding: 12px 14px; font-family: inherit; font-size: 1rem;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(74,222,128,.15);
}
.field textarea { min-height: 140px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-status { padding: 12px 16px; border-radius: 10px; margin-bottom: 6px; font-size: .94rem; border: 1px solid transparent; }
.form-status.err { background: rgba(248,113,113,.09); border-color: rgba(248,113,113,.4); color: #fecaca; }

/* ---------- footer ---------- */
.footer { border-top: 1px solid var(--border); padding: 56px 0 40px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; }
.footer .brand { font-size: 1.3rem; margin-bottom: 12px; display: inline-block; }
.footer p { font-size: .94rem; max-width: 38ch; }
.footer h4 { font-size: .82rem; text-transform: uppercase; letter-spacing: .1em; color: var(--faint); margin-bottom: 14px; }
.footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 9px; }
.footer ul a { color: var(--muted); font-size: .95rem; }
.footer ul a:hover { color: var(--accent); text-decoration: none; }
.footer-bottom {
  border-top: 1px solid var(--border); margin-top: 40px; padding-top: 22px;
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  color: var(--faint); font-size: .85rem; font-family: var(--font-mono);
}

/* utilities */
.center { text-align: center; }
.mt-0 { margin-top: 0; } .mb-0 { margin-bottom: 0; }
.text-muted { color: var(--muted); }
.divider { height: 1px; background: var(--border); border: 0; margin: 0; }
.badge-row { display: flex; gap: 10px; flex-wrap: wrap; margin: 18px 0 0; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .hero-grid, .split, .split.rev { grid-template-columns: 1fr; }
  .split.rev .split-media { order: 0; }
  .grid-3, .grid-2, .stats, .steps, .tiers, .footer-grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2,1fr); }
  .steps { grid-template-columns: 1fr 1fr; }
  .nav-links {
    position: absolute; top: 62px; left: 0; right: 0; flex-direction: column; align-items: stretch;
    background: rgba(10,12,16,.98); border-bottom: 1px solid var(--border); padding: 10px 16px 16px; gap: 2px;
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px; }
  .nav-links .btn { margin-top: 8px; justify-content: center; }
  .nav-toggle { display: block; margin-left: auto; }
  section { padding: 60px 0; }
  .form-row { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .steps, .stats { grid-template-columns: 1fr; }
  .hero-meta { gap: 14px; }
}