/* Tact Net Productions — site styles
   Tokens mirror claude/03-brand-kit.md. Change brand values here only. */
:root {
  --tn-teal-900: #022a3a;
  --tn-teal-850: #03303f;
  --tn-teal-800: #033d52;
  --tn-teal-700: #005778;
  --tn-teal-500: #1a7fa3;
  --tn-mint-200: #ccf0e4;
  --tn-mint-400: #7fddc0;
  --tn-ink: #0b1b22;
  --tn-paper: #f6f8fa;

  --bg: var(--tn-teal-900);
  --surface: rgba(204, 240, 228, 0.04);
  --surface-2: rgba(204, 240, 228, 0.07);
  --line: rgba(204, 240, 228, 0.14);
  --text: #e7f2ef;
  --muted: #9dbcc4;
  --accent: var(--tn-mint-400);

  --font-head: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --radius: 14px;
  --maxw: 1160px;
  --gutter: clamp(16px, 4vw, 32px);
  --section-y: clamp(72px, 10vw, 128px);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 17px/1.65 var(--font-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--tn-mint-200); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
.skip { position: absolute; left: -999px; top: 8px; background: var(--tn-paper); color: var(--tn-ink); padding: 8px 12px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }

h1, h2, h3 { font-family: var(--font-head); line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 0.5em; color: #fff; }
h1 { font-size: clamp(2.6rem, 6.4vw, 4.6rem); font-weight: 700; }
h2 { font-size: clamp(1.9rem, 3.8vw, 2.9rem); font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 600; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }
.lede { font-size: clamp(1.08rem, 1.6vw, 1.25rem); color: var(--muted); max-width: 60ch; }
.eyebrow {
  font: 500 0.78rem/1 var(--font-mono);
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent); display: inline-flex; align-items: center; gap: 10px; margin-bottom: 18px;
}
.eyebrow::before { content: ""; width: 22px; height: 1px; background: currentColor; }
.hl { color: var(--tn-mint-200); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font: 600 0.98rem/1 var(--font-body);
  padding: 15px 22px; border-radius: 999px; text-decoration: none; cursor: pointer;
  border: 1px solid transparent; transition: transform .15s ease, background .2s ease, border-color .2s ease, color .2s;
  min-height: 48px;
}
.btn-primary { background: var(--accent); color: var(--tn-teal-900); }
.btn-primary:hover { background: var(--tn-mint-200); color: var(--tn-teal-900); transform: translateY(-1px); }
.btn-ghost { border-color: var(--line); color: var(--text); background: transparent; }
.btn-ghost:hover { border-color: var(--tn-mint-200); color: #fff; }
.btn svg { width: 18px; height: 18px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(2, 42, 58, 0.82);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid transparent; transition: border-color .2s;
}
.site-header.scrolled { border-bottom-color: var(--line); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: #fff; }
.brand img { width: 40px; height: 40px; }
.brand-name { font: 600 1.08rem/1.1 var(--font-head); letter-spacing: -0.01em; }
.brand-name small { display: block; font: 500 0.66rem/1.3 var(--font-mono); color: var(--muted); letter-spacing: 0.12em; text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: 28px; list-style: none; margin: 0; padding: 0; }
.nav-links a { color: var(--muted); text-decoration: none; font-size: 0.95rem; font-weight: 500; }
.nav-links a:hover { color: #fff; }
.nav-cta { padding: 11px 18px; min-height: 42px; font-size: 0.92rem; }
.nav-links a.btn-primary, .nav-links a.btn-primary:hover { color: var(--tn-teal-900); }
.menu-btn { display: none; background: none; border: 1px solid var(--line); color: var(--text); border-radius: 10px; width: 44px; height: 44px; cursor: pointer; }
.menu-btn svg { margin: auto; }

@media (max-width: 900px) {
  .menu-btn { display: grid; place-items: center; }
  .nav-links {
    position: fixed; inset: 72px 0 auto 0; flex-direction: column; align-items: stretch; gap: 0;
    background: var(--tn-teal-900); border-bottom: 1px solid var(--line);
    padding: 8px var(--gutter) 20px; transform: translateY(-8px); opacity: 0; pointer-events: none;
    transition: opacity .2s, transform .2s;
  }
  .nav-links.open { opacity: 1; transform: none; pointer-events: auto; }
  .nav-links li a { display: block; padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 1.05rem; }
  .nav-links li:last-child a { border: 0; margin-top: 14px; }
  .nav-links .nav-cta { width: 100%; }
}

/* Hero */
.hero { position: relative; padding: clamp(56px, 9vw, 110px) 0 var(--section-y); overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -20% -10% auto auto; width: 70vw; height: 70vw; max-width: 900px; max-height: 900px;
  background: radial-gradient(closest-side, rgba(0, 87, 120, 0.55), transparent 70%);
  pointer-events: none;
}
.hero-grid { position: relative; display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 48px; align-items: center; }
.hero h1 .hl { display: block; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-meta { margin-top: 38px; display: flex; flex-wrap: wrap; gap: 10px 22px; color: var(--muted); font: 500 0.82rem/1.4 var(--font-mono); }
.hero-meta span { display: inline-flex; align-items: center; gap: 8px; }
.hero-meta span::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.hero-visual { position: relative; aspect-ratio: 1; width: 100%; max-width: 460px; justify-self: end; }
.hero-visual svg { width: 100%; height: 100%; }
.pulse { animation: pulse 3.2s ease-in-out infinite; transform-origin: center; }
.spin { animation: spin 26s linear infinite; transform-origin: 200px 200px; }
.flow { stroke-dasharray: 6 10; animation: flow 2.4s linear infinite; }
@keyframes pulse { 0%, 100% { opacity: .35; } 50% { opacity: 1; } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes flow { to { stroke-dashoffset: -32; } }

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { max-width: 320px; justify-self: center; order: -1; margin-bottom: -8px; }
}

/* Capability strip */
.strip { border-block: 1px solid var(--line); background: var(--surface); }
.strip ul { list-style: none; margin: 0; padding: 22px 0; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 14px 28px; }
.strip li { font: 500 0.86rem/1.3 var(--font-mono); color: var(--muted); display: flex; align-items: center; gap: 10px; }
.strip li svg { width: 18px; height: 18px; color: var(--accent); flex: none; }

/* Sections */
section { scroll-margin-top: 80px; }
.section { padding: var(--section-y) 0; }
.section-head { max-width: 720px; margin-bottom: clamp(36px, 5vw, 56px); }
.section-alt { background: linear-gradient(180deg, var(--tn-teal-850), var(--tn-teal-900)); }

/* Cards */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 1000px) { .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; position: relative; transition: border-color .2s, background .2s, transform .2s;
}
.card:hover { border-color: rgba(127, 221, 192, 0.45); background: var(--surface-2); }
.card p { color: var(--muted); font-size: 0.98rem; }
.card ul { margin: 14px 0 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.card li { font-size: 0.92rem; color: var(--text); display: flex; gap: 10px; }
.card li::before { content: ""; flex: none; width: 6px; height: 6px; margin-top: 9px; border-radius: 50%; background: var(--accent); }
.icon {
  width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 20px;
  background: rgba(0, 87, 120, 0.55); border: 1px solid var(--line); color: var(--tn-mint-200);
}
.icon svg { width: 24px; height: 24px; }

/* Process */
.steps { counter-reset: step; }
.step { padding-top: 58px; }
.step::before {
  counter-increment: step; content: "0" counter(step);
  position: absolute; top: 24px; left: 28px; font: 600 0.82rem/1 var(--font-mono); color: var(--accent); letter-spacing: .1em;
}
.step .out { margin-top: 16px; padding-top: 14px; border-top: 1px dashed var(--line); font: 500 0.8rem/1.5 var(--font-mono); color: var(--muted); margin-bottom: 0; }
.step .out b { color: var(--tn-mint-200); font-weight: 500; }

/* AI teams split */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 72px); align-items: center; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; } }
.agent-board { background: rgba(0, 0, 0, 0.18); border: 1px solid var(--line); border-radius: var(--radius); padding: 10px; font-family: var(--font-mono); font-size: 0.84rem; }
.agent-row { display: grid; grid-template-columns: auto 1fr auto; gap: 14px; align-items: center; padding: 14px 14px; border-radius: 10px; }
.agent-row + .agent-row { border-top: 1px solid var(--line); }
.agent-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgba(127, 221, 192, 0.15); }
.agent-row b { color: #fff; font-weight: 500; }
.agent-row span { color: var(--muted); }
.agent-tag { font-size: 0.72rem; color: var(--tn-teal-900); background: var(--tn-mint-200); padding: 3px 8px; border-radius: 999px; white-space: nowrap; }
.agent-tag.human { background: transparent; color: var(--tn-mint-200); border: 1px solid var(--tn-mint-200); }
.checks { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 14px; }
.checks li { display: flex; gap: 12px; color: var(--muted); }
.checks li svg { flex: none; width: 22px; height: 22px; color: var(--accent); margin-top: 2px; }
.checks b { color: #fff; font-weight: 600; }

/* About */
.about { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: clamp(32px, 6vw, 72px); align-items: start; }
@media (max-width: 900px) { .about { grid-template-columns: 1fr; } }
.founder-card { background: linear-gradient(160deg, var(--tn-teal-700), var(--tn-teal-800)); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px; }
.founder-card .mono { font: 500 0.78rem/1.6 var(--font-mono); color: var(--tn-mint-200); letter-spacing: .08em; text-transform: uppercase; }
.founder-card h3 { font-size: 1.6rem; margin: 8px 0 4px; }
.founder-card dl { margin: 22px 0 0; display: grid; gap: 12px; }
.founder-card dt { font: 500 0.72rem/1 var(--font-mono); color: var(--tn-mint-200); text-transform: uppercase; letter-spacing: .12em; }
.founder-card dd { margin: 4px 0 0; color: #fff; font-size: 0.95rem; }

/* FAQ */
.faq { max-width: 820px; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  list-style: none; cursor: pointer; padding: 22px 40px 22px 0; position: relative;
  font: 600 1.08rem/1.4 var(--font-head); color: #fff;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 18px; font: 400 1.6rem/1 var(--font-body); color: var(--accent); transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { color: var(--muted); padding-bottom: 20px; margin: 0; max-width: 70ch; }

/* Contact */
.contact { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(32px, 6vw, 72px); }
@media (max-width: 900px) { .contact { grid-template-columns: 1fr; } }
.contact-info { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 16px; }
.contact-info li { display: flex; gap: 14px; align-items: flex-start; color: var(--muted); }
.contact-info svg { width: 22px; height: 22px; color: var(--accent); flex: none; margin-top: 2px; }
form.card { padding: clamp(22px, 4vw, 36px); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 560px) { .field-row { grid-template-columns: 1fr; } }
.field { display: grid; gap: 8px; margin-bottom: 16px; }
label { font-size: 0.86rem; font-weight: 600; color: var(--text); }
label .opt { color: var(--muted); font-weight: 400; }
input, select, textarea {
  width: 100%; font: 400 1rem/1.4 var(--font-body); color: #fff;
  background: rgba(0, 0, 0, 0.22); border: 1px solid var(--line); border-radius: 10px; padding: 13px 14px;
  transition: border-color .2s, box-shadow .2s;
}
select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none' stroke='%23CCF0E4' stroke-width='1.6'%3E%3Cpath d='M1 1l5 5 5-5'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; padding-right: 38px; }
select option { background: var(--tn-teal-900); }
textarea { min-height: 130px; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(127, 221, 192, 0.2); }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.form-note { font-size: 0.82rem; color: var(--muted); margin: 14px 0 0; }
.form-status { margin-top: 16px; padding: 14px 16px; border-radius: 10px; font-size: 0.95rem; display: none; }
.form-status.ok { display: block; background: rgba(127, 221, 192, 0.12); border: 1px solid rgba(127, 221, 192, 0.5); color: var(--tn-mint-200); }
.form-status.err { display: block; background: rgba(255, 120, 120, 0.08); border: 1px solid rgba(255, 140, 140, 0.45); color: #ffd1d1; }
button[disabled] { opacity: .6; cursor: progress; }

/* CTA band */
.cta-band { text-align: center; padding: clamp(56px, 8vw, 96px) 0; background: radial-gradient(60% 120% at 50% 0%, rgba(0, 87, 120, 0.6), transparent 70%); border-top: 1px solid var(--line); }
.cta-band h2 { max-width: 20ch; margin-inline: auto; }
.cta-band .lede { margin: 0 auto 28px; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 44px 0 36px; color: var(--muted); font-size: 0.9rem; }
.footer-grid { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 24px; align-items: flex-start; }
.footer-links { display: flex; flex-wrap: wrap; gap: 10px 24px; list-style: none; margin: 0; padding: 0; }
.footer-links a { color: var(--muted); text-decoration: none; }
.footer-links a:hover { color: #fff; }
.legal { margin-top: 28px; font-size: 0.8rem; }

/* Prose pages (privacy, 404) */
.prose { max-width: 760px; padding: clamp(48px, 8vw, 96px) 0; }
.prose h1 { font-size: clamp(2.2rem, 5vw, 3.2rem); }
.prose h2 { font-size: 1.4rem; margin-top: 2em; }
.prose p, .prose li { color: var(--muted); }

/* Reveal */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .pulse, .spin, .flow { animation: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
}