/* zpersona brand — dark, serious, mainframe-adjacent */

:root {
  --bg:          #08090c;
  --bg-elev:     #0f1116;
  --bg-card:     #10131a;
  --border:      #1e232d;
  --border-soft: #161a22;
  --ink:         #e8ebf0;
  --ink-muted:   #8a93a4;
  --ink-dim:     #586072;
  --accent:      #5eead4;     /* teal-green phosphor, modernized */
  --accent-dim:  #2dd4bf;
  --accent-soft: rgba(94, 234, 212, 0.12);
  --danger:      #f87171;
  --warn:        #fbbf24;

  --font-sans: -apple-system, BlinkMacSystemFont, "Inter", "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  --font-serif: "Fraunces", "Iowan Old Style", "Palatino", Georgia, serif;
  --font-mono: "JetBrains Mono", "SF Mono", ui-monospace, Menlo, Consolas, monospace;

  --maxw: 1120px;
  --radius: 10px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background:
    radial-gradient(ellipse 900px 500px at 50% -10%, rgba(94, 234, 212, 0.06), transparent 70%),
    var(--bg);
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dim); text-decoration: underline; text-underline-offset: 3px; }

p { margin: 0 0 1em 0; color: var(--ink); }
p.muted, .muted { color: var(--ink-muted); }

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 0.5em 0;
  color: var(--ink);
}
h1 { font-size: clamp(2.25rem, 5vw, 3.75rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.25rem); margin-top: 0; }
h3 { font-size: 1.2rem; letter-spacing: -0.01em; }

code, .mono { font-family: var(--font-mono); font-size: 0.93em; }

/* ---------- layout ---------- */

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

section { padding: 88px 0; border-top: 1px solid var(--border-soft); }
section.hero { border-top: 0; padding-top: 40px; padding-bottom: 120px; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
@media (max-width: 820px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; gap: 24px; }
}

/* ---------- header ---------- */

header.site {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(8, 9, 12, 0.85);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border-soft);
}
header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 1.0rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-decoration: none;
}
.brand:hover { text-decoration: none; color: var(--ink); }
.brand .mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px; height: 26px;
  border-radius: 6px;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 700;
}
nav.site {
  display: flex; align-items: center; gap: 28px;
}
nav.site a { color: var(--ink-muted); font-size: 0.93rem; }
nav.site a:hover { color: var(--ink); text-decoration: none; }
nav.site .btn { padding: 7px 14px; font-size: 0.9rem; }
@media (max-width: 640px) {
  nav.site a:not(.btn) { display: none; }
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 18px;
  border-radius: 8px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform 0.08s ease, background 0.15s ease, border-color 0.15s ease;
  border: 1px solid transparent;
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary {
  background: var(--accent);
  color: #08090c;
  font-weight: 600;
}
.btn-primary:hover { background: #79f0d9; color: #08090c; }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--border);
}
.btn-ghost:hover { border-color: var(--ink-muted); color: var(--ink); }

/* ---------- hero ---------- */

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 6px 12px;
  border-radius: 999px;
  margin-bottom: 24px;
}
.hero p.lead {
  font-size: 1.2rem;
  color: var(--ink-muted);
  max-width: 640px;
  margin-top: 20px;
}
.hero .cta-row { margin-top: 32px; display: flex; gap: 12px; flex-wrap: wrap; }
.hero .console-preview {
  margin-top: 72px;
  background: #05060a;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0,0,0,0.5);
}
.console-preview .bar {
  display: flex; align-items: center; gap: 6px;
  padding: 10px 14px;
  background: #0b0d12;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-dim);
}
.console-preview .dot { width: 10px; height: 10px; border-radius: 50%; background: #2a2f3b; }
.console-preview pre {
  margin: 0;
  padding: 20px 22px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.7;
  color: #c3cbd9;
  overflow-x: auto;
  white-space: pre;
}
.console-preview .sys { color: #6db58e; }
.console-preview .abend { color: #f08a8a; }
.console-preview .ai { color: var(--accent); }
.console-preview .dim { color: var(--ink-dim); }
.console-preview .caret {
  display: inline-block;
  width: 9px;
  height: 1.1em;
  background: var(--accent);
  vertical-align: -2px;
  animation: blink 1.1s steps(2) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ---------- cards ---------- */

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.card h3 { margin-bottom: 8px; }
.card .icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: 8px;
  background: var(--accent-soft); color: var(--accent);
  margin-bottom: 16px;
  font-family: var(--font-mono);
}
.card p { color: var(--ink-muted); margin: 0; }

/* ---------- feature rows ---------- */

.feature-row {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: start;
  padding: 40px 0;
  border-bottom: 1px solid var(--border-soft);
}
.feature-row:last-child { border-bottom: 0; }
.feature-row .kicker {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
}
.feature-row .art {
  background: #05060a;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.7;
  color: #c3cbd9;
  min-height: 180px;
  white-space: pre;
  overflow-x: auto;
}
@media (max-width: 820px) {
  .feature-row { grid-template-columns: 1fr; gap: 20px; }
  .feature-row .art { white-space: pre-wrap; }
}

/* ---------- benchmark table ---------- */

.bench {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}
.bench th, .bench td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-soft);
  text-align: left;
}
.bench th {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
  font-weight: 500;
  border-bottom: 1px solid var(--border);
}
.bench td.num { font-family: var(--font-mono); text-align: right; color: var(--ink); }
.bench tr.us td { background: rgba(94, 234, 212, 0.04); }
.bench tr.us td:first-child { border-left: 2px solid var(--accent); }
.bench .note {
  margin-top: 18px;
  font-size: 0.85rem;
  color: var(--ink-dim);
  font-family: var(--font-mono);
}

/* ---------- contact / CTA ---------- */

.cta-block {
  background:
    radial-gradient(ellipse 600px 200px at 50% 0%, rgba(94, 234, 212, 0.08), transparent 70%),
    var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 56px 40px;
  text-align: center;
}
.cta-block .eyebrow { margin-bottom: 18px; }
.cta-block h2 { margin-bottom: 12px; }
.cta-block p { color: var(--ink-muted); max-width: 560px; margin: 0 auto 24px; }

/* ---------- footer ---------- */

footer.site {
  border-top: 1px solid var(--border-soft);
  padding: 56px 0 40px;
  color: var(--ink-dim);
  font-size: 0.9rem;
}
footer.site .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  align-items: flex-start;
  justify-content: space-between;
}
footer.site .cols { display: flex; gap: 48px; flex-wrap: wrap; }
footer.site .col { display: flex; flex-direction: column; gap: 10px; }
footer.site .col strong {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-muted);
  font-weight: 500;
  margin-bottom: 6px;
}
footer.site a { color: var(--ink-dim); }
footer.site a:hover { color: var(--ink); text-decoration: none; }
footer.site .legal { margin-top: 40px; font-size: 0.82rem; color: var(--ink-dim); width: 100%; border-top: 1px solid var(--border-soft); padding-top: 20px; }

/* ---------- prose pages (privacy, terms, security) ---------- */

.prose { max-width: 760px; margin: 0 auto; padding: 80px 28px 120px; }
.prose h1 { font-size: clamp(1.9rem, 3.5vw, 2.5rem); margin-bottom: 8px; }
.prose .meta { color: var(--ink-dim); font-family: var(--font-mono); font-size: 0.85rem; margin-bottom: 40px; }
.prose h2 { font-size: 1.3rem; margin: 40px 0 10px; }
.prose h3 { font-size: 1.05rem; margin: 24px 0 6px; color: var(--ink); }
.prose p, .prose li { color: var(--ink); }
.prose ul { padding-left: 22px; }
.prose li { margin-bottom: 6px; }
.prose strong { color: var(--ink); font-weight: 600; }
.prose hr { border: 0; border-top: 1px solid var(--border-soft); margin: 48px 0; }

/* ---------- util ---------- */

.center { text-align: center; }
.small { font-size: 0.88rem; }
.row { display: flex; gap: 16px; flex-wrap: wrap; }
.tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}