/* ─────────────────────────────────────────────────────────────
   Seering LLC — "Instrument" design system
   Shared by index.html, privacy.html, terms.html, support.html
   ───────────────────────────────────────────────────────────── */

:root{
  /* surfaces */
  --bg:#fbfbf9;
  --bg-card:#ffffff;
  --border:#e2e1da;
  --rule:#d9d8d2;

  /* ink scale — kept under the original variable names so page
     markup that references them needs no edits */
  --text-1:#15181c;
  --text-2:#4b5159;
  --text-3:#8a8f97;
  --ink-2:#3d434b;
  --faint:#b3b1a8;

  /* accent: ink by default. Brand cyan is reserved for the live
     star in the Threadlytics mark and nothing else. */
  --accent:#15181c;
  --cyan:#4EC5D6;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--text-1);
  font-family:'IBM Plex Sans',-apple-system,system-ui,sans-serif;
  font-size:16px;line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit}
.container,.wrap{max-width:1080px;margin:0 auto;padding:0 40px}
.mono{font-family:'IBM Plex Mono',monospace}

/* ── nav ── */
nav{display:flex;justify-content:space-between;align-items:center;padding:20px 0;border-bottom:1px solid var(--text-1)}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.brand svg{display:block;width:30px;height:30px}
.brand .word{font-family:'IBM Plex Mono',monospace;font-weight:600;font-size:15px;letter-spacing:-.01em}
nav .links{display:flex;gap:26px}
nav .links a,nav a.nav-link{
  font-family:'IBM Plex Mono',monospace;font-size:12px;text-transform:uppercase;
  letter-spacing:.08em;color:var(--text-2);text-decoration:none;
}
nav .links a:hover,nav a.nav-link:hover{color:var(--text-1);text-decoration:underline;text-underline-offset:4px}

/* ── the mark: live star ── */
@keyframes starPulse{0%,100%{opacity:.35}45%{opacity:1}}
@keyframes haloPulse{0%,100%{opacity:.10;r:16}45%{opacity:.30;r:26}}
.live-core{animation:starPulse 2.4s ease-in-out infinite}
.live-halo{animation:haloPulse 2.4s ease-in-out infinite}
@media (prefers-reduced-motion:reduce){.live-core,.live-halo{animation:none;opacity:.9}}

/* ── hero (home) ── */
.hero{display:grid;grid-template-columns:1.12fr .88fr;gap:56px;padding:76px 0 64px;align-items:start}
.kicker{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--text-3);margin-bottom:18px}
h1{font-size:clamp(32px,4.4vw,50px);line-height:1.06;letter-spacing:-.025em;font-weight:600;max-width:15ch}
.lede{margin-top:22px;font-size:17px;color:var(--ink-2);max-width:46ch;line-height:1.62}
.hero-aside{display:flex;flex-direction:column;gap:24px;align-items:stretch}
.plate{width:100%;max-width:300px;align-self:center}
.plate svg{display:block;width:100%;height:auto}

/* ── spec / detail tables ── */
.spec,.card-detail{border:1px solid var(--text-1);background:var(--bg-card);font-family:'IBM Plex Mono',monospace;font-size:12.5px}
.spec div,.card-detail div{display:flex;justify-content:space-between;gap:16px;padding:9px 14px;border-bottom:1px solid var(--border)}
.spec div:last-child,.card-detail div:last-child{border-bottom:0}
.spec span:first-child,.card-detail span:first-child{color:var(--text-3)}

/* ── sections ── */
section{padding:56px 0}
.rule{border-top:1px solid var(--rule)}
h2{font-family:'IBM Plex Mono',monospace;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--text-3);margin-bottom:26px}
h3{letter-spacing:-.015em}

.feat{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--text-1)}
.feat > div{padding:26px 24px 30px;border-right:1px solid var(--border)}
.feat > div:last-child{border-right:0}
.feat h3{font-size:18px;font-weight:600;margin-bottom:10px}
.feat p{font-size:14.5px;color:var(--text-2);line-height:1.6}
.num{font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--faint);display:block;margin-bottom:14px;letter-spacing:.1em}

.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split h3{font-size:26px;font-weight:600;margin-bottom:14px}
.split p{color:var(--text-2);font-size:15.5px;margin-bottom:12px}

.panel{border:1px solid var(--text-1);background:var(--bg-card);padding:20px;font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--ink-2)}
.panel .hd{color:var(--text-3);letter-spacing:.1em;text-transform:uppercase;font-size:10.5px;margin-bottom:18px}
.bar{height:6px;background:#e6e5de;margin:6px 0 14px;position:relative}
.bar i{position:absolute;left:0;top:0;bottom:0;background:var(--text-1)}
.bar-lbl{color:var(--text-3)}

.chat{border:1px solid var(--text-1);background:var(--bg-card)}
.chat .tag{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--text-3);padding:11px 18px;border-bottom:1px solid var(--border)}
.chat .q{padding:14px 18px;border-bottom:1px solid var(--border);font-size:14.5px}
.chat .ans{padding:16px 18px;font-size:14.5px;color:var(--text-2);line-height:1.62}
.chat .prov{border-top:1px solid var(--border);border-bottom:0}

.chip{display:inline-block;font-family:'IBM Plex Mono',monospace;font-size:11px;border:1px solid #c9c7bd;padding:4px 10px;margin:4px 6px 0 0;color:var(--text-2)}

/* ── editions ── */
.tiers{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--text-1)}
.tiers > div{padding:28px 26px}
.tiers > div:first-child{border-right:1px solid var(--text-1);background:var(--bg-card)}
.tiers h3{font-size:20px;font-weight:600;margin-bottom:4px}
.tiers .tagline{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--text-3);margin-bottom:18px}
.tiers ul{list-style:none;font-size:14.5px;color:var(--text-2)}
.tiers li{padding:7px 0 7px 18px;position:relative;border-bottom:1px solid #edece6}
.tiers li:before{content:'—';position:absolute;left:0;color:var(--faint)}
.tiers li:last-child{border-bottom:0}
.soon{background:var(--text-1);color:var(--bg)}
.soon h3{color:var(--bg)}
.soon .tagline{color:#8f96a1}
.soon li{color:#cfd4da;border-bottom-color:#2c3037}
.soon li:before{color:#5b6069}
.soon .fine{font-size:13px;color:#8f96a1;margin-top:16px;line-height:1.6}

/* ── about / contact (home) ── */
.about{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.about h3{font-size:26px;font-weight:600;margin-bottom:14px}
.about p{color:var(--text-2);font-size:15.5px;margin-bottom:12px}
.contact{border-top:1px solid var(--text-1);padding:44px 0}
.contact h3{font-size:22px;font-weight:600;margin-bottom:8px}
.contact p{color:var(--text-2);font-size:15px}
.contact a.mail{font-family:'IBM Plex Mono',monospace;font-size:15px;border-bottom:1px solid var(--text-1);text-decoration:none;padding-bottom:1px}

/* ── document pages: privacy / terms / support ── */
.page-header{padding:56px 0 34px;border-bottom:1px solid var(--text-1);margin-bottom:48px}
.page-eyebrow{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--text-3);margin-bottom:16px}
.page-header h1{font-size:clamp(28px,4vw,42px);font-weight:600;letter-spacing:-.025em;margin-bottom:12px;max-width:none}
.page-header .meta{font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--text-3)}

.prose{max-width:720px;padding-bottom:90px}
.prose section{margin-bottom:44px;padding:0}
.prose h2{
  font-family:'IBM Plex Sans',sans-serif;font-size:19px;font-weight:600;
  letter-spacing:-.015em;text-transform:none;color:var(--text-1);
  margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--border);
}
.prose h3{font-size:15px;font-weight:600;color:var(--text-1);margin:22px 0 8px}
.prose p{font-size:15.5px;color:var(--text-2);line-height:1.78;margin-bottom:14px}
.prose ul{list-style:none;margin:0 0 14px 0;padding:0}
.prose ul li{font-size:15.5px;color:var(--text-2);line-height:1.78;padding:4px 0 4px 20px;position:relative}
.prose ul li:before{content:'—';position:absolute;left:0;top:4px;color:var(--faint)}
.prose a{color:var(--text-1);text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--faint)}
.prose a:hover{text-decoration-color:var(--text-1)}
.prose strong{color:var(--text-1);font-weight:600}

.info-card{
  border:1px solid var(--text-1);background:var(--bg-card);
  padding:20px 22px;margin-top:16px;
  font-family:'IBM Plex Mono',monospace;font-size:12.5px;color:var(--text-2);line-height:2;
}
.info-card strong{color:var(--text-3);font-weight:500}

/* support-page helpers */
.faq{border-top:1px solid var(--text-1);margin-top:8px}
.faq > div{border-bottom:1px solid var(--border);padding:20px 0}
.faq h3{margin:0 0 8px;font-size:16px}
.faq p{margin:0}

/* ── footer ── */
footer{
  border-top:1px solid var(--rule);padding:26px 0 60px;
  font-family:'IBM Plex Mono',monospace;font-size:11.5px;color:var(--text-3);
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:center;
}
footer a{text-decoration:none;margin-right:20px}
footer a:hover{color:var(--text-1)}

/* ── responsive ── */
@media(max-width:860px){
  .hero,.split,.about{grid-template-columns:1fr;gap:36px}
  .feat,.tiers{grid-template-columns:1fr}
  .feat > div{border-right:0;border-bottom:1px solid var(--border)}
  .feat > div:last-child{border-bottom:0}
  .tiers > div:first-child{border-right:0;border-bottom:1px solid var(--text-1)}
  .container,.wrap{padding:0 24px}
  .hero{padding:52px 0 44px}
  .split.flip > div:first-child{order:2}
  .page-header{padding:40px 0 28px;margin-bottom:36px}
  footer{flex-direction:column;align-items:flex-start;gap:10px}
  nav .links{gap:18px}
}
@media(max-width:520px){
  nav{flex-direction:column;align-items:flex-start;gap:14px}
}

/* ── support page ── */
.page-header p{font-size:16px;color:var(--text-2);max-width:60ch;margin-top:8px;line-height:1.7}
.contact-card{border:1px solid var(--text-1);background:var(--bg-card);padding:28px 30px;margin-bottom:48px}
.contact-card h2{font-family:'IBM Plex Sans',sans-serif;font-size:20px;font-weight:600;text-transform:none;letter-spacing:-.015em;color:var(--text-1);margin-bottom:8px}
.contact-card p{font-size:15px;color:var(--text-2);margin-bottom:22px;line-height:1.7}
.contact-link{display:inline-flex;align-items:center;gap:9px;background:var(--text-1);color:var(--bg);font-family:'IBM Plex Mono',monospace;font-size:14px;padding:11px 20px;text-decoration:none}
.contact-link:hover{background:#2c3037}
.faq-section h2{font-family:'IBM Plex Sans',sans-serif;font-size:22px;font-weight:600;text-transform:none;letter-spacing:-.02em;color:var(--text-1);margin-bottom:20px}
.faq-item{border-bottom:1px solid var(--border);padding:20px 0}
.faq-item:first-of-type{border-top:1px solid var(--text-1)}
.faq-item:last-child{border-bottom:none}
.faq-q{font-size:16px;font-weight:600;color:var(--text-1);margin-bottom:9px}
.faq-a{font-size:15px;color:var(--text-2);line-height:1.78}
.faq-a a{color:var(--text-1);text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--faint)}
.faq-a a:hover{text-decoration-color:var(--text-1)}
.faq-a code{font-family:'IBM Plex Mono',monospace;font-size:13px;background:#f0efe9;border:1px solid var(--border);padding:1px 6px;color:var(--text-1)}