/* ============================================================================
   TelcoCommand — shared design system
   Dark "command ground" chrome (nav / marquee / footer) + light editorial
   reading surface for long-form insights. Navy #081226 · cyan #2ad4ee.
   ============================================================================ */
:root{
  --ground:#081226; --ground2:#0a1830; --panel:#0d1e3a; --line:#1c3560;
  --ink:#e7eefc; --mut:#9fb3d6; --mut2:#7f97be; --cyan:#2ad4ee; --cyan-deep:#0ea5c9;
  /* light reading surface */
  --paper:#f6f8fc; --paper2:#ffffff; --card-ink:#0c1a33; --body-ink:#2b3a56;
  --body-mut:#5a6b8a; --hair:#e2e8f2; --hair2:#eef2f8;
  --ok:#17a673; --accent-soft:rgba(14,165,201,.09);
  --f:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,"Times New Roman",serif;
  --wrap:1160px; --read:720px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
html,body{margin:0}
body{font-family:var(--f);color:var(--body-ink);background:var(--paper);-webkit-font-smoothing:antialiased}
a{color:var(--cyan-deep)}
img{max-width:100%}

/* ---- top nav (dark) --------------------------------------------------- */
.tc-nav{background:var(--ground2);border-bottom:1px solid var(--line)}
.tc-nav-in{max-width:var(--wrap);margin:0 auto;padding:15px 26px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.tc-brand{display:flex;align-items:center;gap:9px;font-size:20px;font-weight:800;letter-spacing:-.4px;color:var(--ink);text-decoration:none}
.tc-brand b{color:var(--cyan)}
.tc-dot{width:8px;height:8px;border-radius:50%;background:var(--cyan);animation:tc-ping 2.4s ease-out infinite}
@keyframes tc-ping{0%{box-shadow:0 0 0 0 rgba(42,212,238,.55)}70%{box-shadow:0 0 0 8px rgba(42,212,238,0)}100%{box-shadow:0 0 0 0 rgba(42,212,238,0)}}
@media(prefers-reduced-motion:reduce){.tc-dot{animation:none}}
.tc-navlinks{display:flex;align-items:center;gap:24px}
.tc-navlinks a{color:var(--mut);text-decoration:none;font-size:14px;font-weight:600;letter-spacing:.2px}
.tc-navlinks a:hover{color:var(--ink)}
.tc-navcta{background:linear-gradient(90deg,var(--cyan-deep),var(--cyan));color:#04222f!important;padding:9px 16px;border-radius:9px;font-weight:800!important}
.tc-navcta:hover{filter:brightness(1.06)}
@media(max-width:720px){.tc-navlinks .tc-hidesm{display:none}}

/* ---- generic page header band (dark) ---------------------------------- */
.tc-band{background:radial-gradient(760px 380px at 85% -20%,rgba(42,212,238,.16),transparent 60%),linear-gradient(180deg,var(--ground2),var(--ground));color:var(--ink)}
.tc-band-in{max-width:var(--wrap);margin:0 auto;padding:52px 26px 46px}
.tc-eyebrow{display:inline-flex;align-items:center;gap:7px;font-size:11.5px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:var(--cyan);margin:0 0 14px}
.tc-band h1{font-size:40px;line-height:1.06;margin:0;font-weight:800;letter-spacing:-1px;max-width:20ch;text-wrap:balance}
.tc-band .tc-dek{color:#c6d5ef;font-size:18px;line-height:1.55;margin:16px 0 0;max-width:60ch}

/* ---- breadcrumb ------------------------------------------------------- */
.tc-crumb{max-width:var(--read);margin:0 auto;padding:20px 26px 0;font-size:13px;color:var(--body-mut)}
.tc-crumb a{color:var(--body-mut);text-decoration:none}.tc-crumb a:hover{color:var(--cyan-deep)}

/* ---- article (light editorial) ---------------------------------------- */
.doc{max-width:var(--read);margin:0 auto;padding:12px 26px 60px}
.doc-head{padding:26px 0 22px;border-bottom:1px solid var(--hair)}
.doc-cat{font-size:11.5px;font-weight:700;letter-spacing:1.6px;text-transform:uppercase;color:var(--cyan-deep)}
.doc-head h1{font-size:36px;line-height:1.12;letter-spacing:-.9px;color:var(--card-ink);margin:12px 0 12px;font-weight:800;text-wrap:balance}
.doc-dek{font-size:19px;line-height:1.5;color:var(--body-mut);margin:0}
.doc-meta{margin:16px 0 0;font-size:13px;color:var(--body-mut);display:flex;gap:14px;align-items:center}
.doc-meta .tc-pipe{width:4px;height:4px;border-radius:50%;background:#c3cede}
.doc article,.doc-body{font-size:17.5px;line-height:1.72;color:var(--body-ink)}
.doc-body h2{font-size:25px;line-height:1.2;letter-spacing:-.5px;color:var(--card-ink);margin:2.1em 0 .55em;font-weight:800;text-wrap:balance}
.doc-body h3{font-size:19.5px;line-height:1.25;color:var(--card-ink);margin:1.7em 0 .4em;font-weight:700}
.doc-body p{margin:0 0 1.15em}
.doc-body a{color:var(--cyan-deep);text-decoration:underline;text-decoration-color:rgba(14,165,201,.35);text-underline-offset:2px}
.doc-body a:hover{text-decoration-color:var(--cyan-deep)}
.doc-body ul,.doc-body ol{margin:0 0 1.3em;padding-left:1.25em}
.doc-body li{margin:0 0 .5em}
.doc-body li::marker{color:var(--cyan-deep)}
.doc-body strong{color:var(--card-ink);font-weight:700}
.doc-body blockquote{margin:1.5em 0;padding:4px 0 4px 22px;border-left:3px solid var(--cyan);font-family:var(--serif);font-size:21px;line-height:1.5;color:var(--card-ink);font-style:italic}
.doc-body h2:first-child,.doc-body h3:first-child{margin-top:.2em}

/* callout box */
.callout{background:var(--accent-soft);border:1px solid rgba(14,165,201,.22);border-radius:14px;padding:18px 20px;margin:1.7em 0}
.callout p{margin:0 0 .6em;font-size:16px;line-height:1.6}
.callout p:last-child{margin:0}
.callout .callout-k{display:block;font-size:11.5px;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;color:var(--cyan-deep);margin-bottom:6px}

/* inline CTA band inside an article */
.cta-band{margin:2.4em 0 .6em;background:linear-gradient(135deg,var(--ground2),var(--panel));border-radius:16px;padding:26px 26px;color:var(--ink)}
.cta-band h3{margin:0 0 6px;font-size:21px;color:#fff;letter-spacing:-.3px}
.cta-band p{margin:0 0 16px;color:#c6d5ef;font-size:15px;line-height:1.55}
.cta-band .tc-btn{background:linear-gradient(90deg,var(--cyan-deep),var(--cyan));color:#04222f;font-weight:800;text-decoration:none;padding:12px 20px;border-radius:10px;font-size:15px;display:inline-block}
.cta-band .tc-btn:hover{filter:brightness(1.06)}

/* ---- related / hub cards ---------------------------------------------- */
.tc-related{max-width:var(--read);margin:0 auto;padding:8px 26px 8px}
.tc-related h4{font-size:12px;letter-spacing:1.6px;text-transform:uppercase;color:var(--body-mut);margin:0 0 14px}
.tc-relgrid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.tc-relcard{display:block;border:1px solid var(--hair);border-radius:13px;padding:16px 17px;background:var(--paper2);text-decoration:none;transition:border-color .15s,transform .15s}
.tc-relcard:hover{border-color:var(--cyan);transform:translateY(-2px)}
.tc-relcard .rc-cat{font-size:11px;font-weight:700;letter-spacing:1.2px;text-transform:uppercase;color:var(--cyan-deep)}
.tc-relcard .rc-t{display:block;color:var(--card-ink);font-weight:700;font-size:16px;line-height:1.3;margin-top:5px}
@media(max-width:640px){.tc-relgrid{grid-template-columns:1fr}}

/* hub */
.hub{max-width:var(--wrap);margin:0 auto;padding:40px 26px 20px}
.hub-filter{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 26px}
.hub-chip{font-size:13px;font-weight:600;color:var(--body-mut);border:1px solid var(--hair);background:var(--paper2);border-radius:20px;padding:6px 14px;cursor:pointer;transition:all .15s}
.hub-chip:hover{border-color:var(--cyan);color:var(--card-ink)}
.hub-chip.on{background:var(--ground2);color:#fff;border-color:var(--ground2)}
.hub-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.hub-card{display:flex;flex-direction:column;border:1px solid var(--hair);border-radius:16px;padding:22px 20px;background:var(--paper2);text-decoration:none;transition:border-color .15s,transform .15s,box-shadow .15s}
.hub-card:hover{border-color:var(--cyan);transform:translateY(-3px);box-shadow:0 18px 40px rgba(10,24,48,.08)}
.hub-card .hc-cat{font-size:11px;font-weight:700;letter-spacing:1.3px;text-transform:uppercase;color:var(--cyan-deep)}
.hub-card .hc-t{color:var(--card-ink);font-weight:800;font-size:19px;line-height:1.24;letter-spacing:-.3px;margin:9px 0 8px;text-wrap:balance}
.hub-card .hc-d{color:var(--body-mut);font-size:14.5px;line-height:1.55;margin:0 0 16px;flex:1}
.hub-card .hc-r{font-size:12.5px;color:var(--body-mut);font-weight:600}
.hub-card .hc-go{color:var(--cyan-deep);font-weight:700;font-size:13px}
@media(max-width:900px){.hub-grid{grid-template-columns:1fr 1fr}}
@media(max-width:620px){.hub-grid{grid-template-columns:1fr}}

/* ---- carrier marquee (dark) ------------------------------------------- */
.tc-carriers{background:var(--ground);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:30px 0;overflow:hidden}
.tc-carriers .tc-cap{max-width:var(--wrap);margin:0 auto 18px;padding:0 26px;font-size:12px;letter-spacing:1.8px;text-transform:uppercase;color:var(--mut2);text-align:center}
.tc-track{display:flex;gap:52px;width:max-content;animation:tc-scroll 55s linear infinite}
.tc-carriers:hover .tc-track{animation-play-state:paused}
@media(prefers-reduced-motion:reduce){.tc-track{animation:none;flex-wrap:wrap;width:auto;justify-content:center;gap:34px 52px;padding:0 26px}}
@keyframes tc-scroll{from{transform:translateX(0)}to{transform:translateX(-50%)}}
.tc-logo{flex:none;font-size:20px;font-weight:800;letter-spacing:-.5px;color:#8ea6cc;opacity:.72;white-space:nowrap;transition:color .2s,opacity .2s;font-family:var(--f)}
.tc-logo:hover{color:var(--cyan);opacity:1}
.tc-logo .lo-sub{font-weight:500;letter-spacing:0;font-size:14px;opacity:.8}

/* ---- footer (dark) ---------------------------------------------------- */
.tc-foot{background:var(--ground2);border-top:1px solid var(--line);color:var(--mut)}
.tc-foot-in{max-width:var(--wrap);margin:0 auto;padding:38px 26px;display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
.tc-foot h5{color:var(--ink);font-size:13px;letter-spacing:.4px;margin:0 0 12px;text-transform:uppercase;font-weight:700}
.tc-foot a{display:block;color:var(--mut);text-decoration:none;font-size:14px;margin:0 0 9px}
.tc-foot a:hover{color:var(--cyan)}
.tc-foot .tc-foot-brand b{color:var(--cyan)}
.tc-foot .tc-foot-brand p{font-size:13.5px;line-height:1.6;color:var(--mut2);max-width:34ch}
.tc-foot-legal{border-top:1px solid var(--line);text-align:center;font-size:12.5px;color:var(--mut2);padding:16px 26px}
@media(max-width:720px){.tc-foot-in{grid-template-columns:1fr 1fr}}

/* ---- sticky quote button (non-form pages) ----------------------------- */
.tc-sticky{position:fixed;right:20px;bottom:20px;z-index:60;display:inline-flex;align-items:center;gap:9px;background:linear-gradient(90deg,var(--cyan-deep),var(--cyan));color:#04222f;font-weight:800;font-size:15px;text-decoration:none;padding:14px 20px;border-radius:14px;box-shadow:0 14px 34px rgba(4,20,40,.4);transition:transform .15s,filter .15s}
.tc-sticky:hover{transform:translateY(-2px);filter:brightness(1.06)}
.tc-sticky .tc-sdot{width:8px;height:8px;border-radius:50%;background:#04222f;opacity:.55}
@media(max-width:600px){.tc-sticky{right:14px;bottom:14px;padding:12px 16px;font-size:14px}}