/* =============================================================
   C3ntro Telecom — Shared Stylesheet
   Loaded on every page. Contains: CSS variables, reset,
   primitive utilities, nav, footer, reveal animation.
   Page-specific CSS lives in /assets/PAGE.css.
   ============================================================= */

/* ── CSS Variables ─────────────────────────────────────────── */
:root{
  --bg-deep:#0A1424;
  --bg-surface:#0F1D33;
  --bg-elevated:#15263F;
  --bg-inset:#0C1A2E;
  --band-a:#080c17;
  --band-b:#0d1729;
  --divider:linear-gradient(90deg, transparent, rgba(204,231,255,.18) 18%, rgba(0,229,204,.35) 50%, rgba(204,231,255,.18) 82%, transparent);
  --c3-navy:#0F1D33;
  --c3-navy-mid:#1E3A5F;
  --c3-blue-dark:#1A4FBF;
  --c3-blue-royal:#1A56DB;
  --c3-blue:#2563A8;
  --c3-purple:#5B3AA0;
  --c3-purple-viv:#7C3AED;
  --c3-teal:#4A90C4;
  --c3-cyan:#00E5CC;
  --c3-light-blue:#CCE7FF;
  --c3-gold:#C9A84C;
  --c3-green:#38A169;
  --c3-red:#E53E3E;
  --border-subtle:#1F3354;
  --border-strong:#2D4D80;

  --accent-cyan:#00E5CC;
  --accent-mint:#7FE5A6;
  --accent-orange:#4A90C4;
  --accent-magenta:#C9A84C;
  --accent-blue:#1A56DB;

  --bg-light:#F0F4FF;
  --bg-light-soft:#FAFBFC;
  --ink-primary:#0F1D33;
  --ink-secondary:#424448;

  --text-primary:#FFFFFF;
  --text-secondary:#CCE7FF;
  --text-muted:#6B7B8D;
  --text-mono:#CCE7FF;

  --font-sans:"Montserrat", ui-sans-serif, system-ui, sans-serif;
  --font-body:"Inter", ui-sans-serif, system-ui, sans-serif;
  --font-mono:"JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --max:1440px;
  --gutter:24px;
  --pad-x:clamp(24px, 5vw, 72px);
  --section-py:clamp(72px, 11vw, 160px);
}

/* ── Base Reset ─────────────────────────────────────────────── */
*{box-sizing:border-box;margin:0;padding:0}
html,body{background:#0a0f1e;color:var(--text-primary);font-family:var(--font-body);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
html{scroll-behavior:smooth;scroll-padding-top:88px}
body{overflow-x:hidden}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
h1,h2,h3,h4,h5,h6{font-family:var(--font-sans);font-weight:800;letter-spacing:-0.025em}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}

/* ── Primitive Utilities ────────────────────────────────────── */
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--pad-x)}
.marker{
  font-family:var(--font-sans);
  font-size:11px;font-weight:700;
  letter-spacing:0.22em;
  text-transform:uppercase;
  color:var(--c3-light-blue);
  display:inline-flex;
  align-items:center;
  gap:10px;
  line-height:1;
}
.marker::before{content:"";width:28px;height:2px;background:var(--c3-blue-royal);display:inline-block}
.rule{height:1px;background:var(--border-subtle);width:100%}
.mono{font-family:var(--font-mono);font-feature-settings:"zero","ss01"}
.eyebrow{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:0.16em;
  text-transform:uppercase;
  color:var(--text-muted);
}
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 28px;
  border-radius:999px;
  font-weight:600;font-size:14px;
  transition:all .18s ease;
  border:1px solid transparent;
  line-height:1;
  white-space:nowrap;
}
.btn-primary{background:var(--sublime-grad, linear-gradient(90deg,var(--c3-blue-royal),var(--c3-cyan)));color:#fff;border:0;box-shadow:0 12px 30px -10px rgba(0,0,0,.45)}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 18px 42px -12px rgba(0,0,0,.55)}
.btn-ghost{border-color:rgba(204,231,255,.25);color:var(--text-primary)}
.btn-ghost:hover{border-color:var(--c3-cyan);color:var(--c3-cyan)}
.arrow{display:inline-block;transition:transform .2s ease}
.btn:hover .arrow{transform:translateX(3px)}

/* ── Navigation ─────────────────────────────────────────────── */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  transition:background .25s ease, border-color .25s ease, backdrop-filter .25s ease;
  border-bottom:1px solid transparent;
}
.nav.scrolled{
  background:rgba(10,15,30,.85);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom-color:rgba(204,231,255,.1);
}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:72px;
}
.logo{
  display:inline-flex;align-items:center;gap:8px;
  color:var(--text-primary);
}
.logo-wrap{position:relative;display:block;line-height:0}
.logo-wrap .logo-default{height:22px;width:auto;display:block;filter:brightness(0) invert(1);transition:opacity .2s ease}
.logo-wrap .logo-aqua{position:absolute;top:0;left:0;height:22px;width:auto;display:block;opacity:0;transition:opacity .2s ease}
.logo:hover .logo-default{opacity:0}
.logo:hover .logo-aqua{opacity:1}
.foot-brand .logo-wrap .logo-default,.foot-brand .logo-wrap .logo-aqua{height:28px}
.nav-links{display:flex;align-items:center;gap:36px}
.nav-link{
  font-size:13.5px;color:var(--text-secondary);font-weight:500;
  display:inline-flex;align-items:center;gap:5px;
  cursor:pointer;
  padding:6px 0;
  position:relative;
}
.nav-link:hover{color:var(--text-primary)}
.nav-link svg{opacity:.6;transition:transform .2s ease}
.nav-link:hover svg{transform:translateY(1px)}
.nav-right{display:flex;align-items:center;gap:20px}
.lang{
  font-family:var(--font-mono);font-size:11px;letter-spacing:0.08em;
  color:var(--text-muted);
  display:inline-flex;gap:8px;align-items:center;
}
.lang .active{color:var(--text-primary)}
.lang .sep{opacity:.4}
.nav-cta{
  border:0;
  border-radius:999px;
  padding:10px 20px;
  font-size:13px;font-weight:600;
  color:#fff;
  background:var(--sublime-grad, linear-gradient(90deg,var(--c3-blue-royal),var(--c3-cyan)));
  box-shadow:0 8px 22px -10px rgba(0,0,0,.5);
  transition:all .18s ease;
}
.nav-cta:hover{filter:brightness(1.08);transform:translateY(-1px)}

/* ── Nav Dropdown Menu ──────────────────────────────────────── */
.nav-links .menu-item{position:relative;display:inline-flex;align-items:center}
.nav-links .menu-item>.nav-link{display:inline-flex;align-items:center;gap:6px;cursor:pointer}
.nav-links .menu-item>.nav-link .chev{opacity:.55;transition:transform .2s ease}
.nav-links .menu-item:hover>.nav-link .chev{transform:rotate(180deg)}
.nav-links .menu-item::after{content:"";position:absolute;top:100%;left:0;right:0;height:16px}
.nav-links .menu-dd{
  position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(12px);
  min-width:210px;padding:8px;
  background:rgba(10,15,30,.97);backdrop-filter:blur(16px) saturate(140%);-webkit-backdrop-filter:blur(16px) saturate(140%);
  border:1px solid rgba(204,231,255,.14);border-radius:11px;
  display:flex;flex-direction:column;gap:2px;
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .18s ease, transform .18s ease, visibility .18s ease;
  box-shadow:0 24px 55px -16px rgba(0,0,0,.6);z-index:70;
}
.nav-links .menu-item:hover .menu-dd{opacity:1;visibility:visible;pointer-events:auto;transform:translateX(-50%) translateY(8px)}
.nav-links .menu-dd a{display:block;padding:10px 14px;border-radius:8px;font-size:13.5px;font-weight:500;font-family:var(--font-sans);color:var(--text-secondary,#CCE7FF);white-space:nowrap;transition:background .15s ease, color .15s ease}
.nav-links .menu-dd a:hover{background:rgba(204,231,255,.09);color:#fff}
.nav-links .nav-link.active{color:var(--text-primary,#fff)}

/* ── Section Head ───────────────────────────────────────────── */
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:32px;margin-bottom:72px;flex-wrap:wrap}
.section-head h2{
  font-size:clamp(28px, 3.9vw, 54px);
  font-weight:800;
  letter-spacing:-0.035em;
  line-height:1.04;
  max-width:20ch;
  text-wrap:balance;
}
.section-head .right{max-width:38ch;color:rgba(204,231,255,.7);font-size:16px;line-height:1.6;font-family:var(--font-body)}

/* ── Footer ─────────────────────────────────────────────────── */
footer{padding:96px 0 32px;background:#0a0f1e}
.footer-top{
  display:grid;grid-template-columns:1.4fr repeat(5,1fr);
  gap:32px;
  padding-bottom:64px;
  border-bottom:1px solid var(--border-subtle);
}
.foot-brand .logo{font-size:24px;margin-bottom:20px}
.foot-brand p{color:var(--text-muted);font-size:13.5px;line-height:1.55;max-width:30ch}
.foot-col h6{
  font-family:var(--font-sans);font-size:10.5px;letter-spacing:0.18em;font-weight:700;
  color:var(--c3-cyan);text-transform:uppercase;
  margin-bottom:18px;
}
.foot-col ul{list-style:none;display:flex;flex-direction:column;gap:11px}
.foot-col li a{
  color:var(--text-secondary);font-size:13.5px;
  transition:color .15s ease;
}
.foot-col li a:hover{color:var(--accent-cyan)}

.offices-strip{
  display:grid;grid-template-columns:repeat(5,1fr);gap:32px;
  padding:48px 0;border-bottom:1px solid var(--border-subtle);
}
.office h6::before{content:"\2014 \00a0";color:var(--c3-cyan);opacity:.8}
.office h6{
  font-family:var(--font-mono);font-size:11px;letter-spacing:0.14em;
  color:var(--accent-cyan);text-transform:uppercase;margin-bottom:12px;
}
.office .addr{
  font-size:13.5px;color:var(--text-secondary);line-height:1.55;
}
.office .phone{
  font-family:var(--font-mono);font-size:12.5px;color:var(--text-muted);
  margin-top:8px;display:block;
}

.footer-bottom{
  padding:32px 0 0;
  display:flex;justify-content:space-between;align-items:center;
  gap:24px;flex-wrap:wrap;
}
.foot-bot-l{
  display:flex;gap:24px;align-items:center;
  font-family:var(--font-mono);font-size:11px;letter-spacing:0.1em;
  color:var(--text-muted);text-transform:uppercase;
}
.foot-bot-l a:hover{color:var(--accent-cyan)}
.socials{display:flex;gap:14px}
.social{
  width:36px;height:36px;border:1px solid var(--border-subtle);
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--text-muted);transition:all .15s ease;
}
.social:hover{border-color:var(--accent-cyan);color:var(--accent-cyan)}

/* ── Scroll Reveal ──────────────────────────────────────────── */
.reveal{opacity:0;transform:translateY(8px);transition:opacity .6s ease, transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* ── Responsive — Nav & Footer ──────────────────────────────── */
@media (max-width:980px){
  .nav-links{display:none}
  .footer-top{grid-template-columns:repeat(2,1fr)}
  .offices-strip{grid-template-columns:repeat(2,1fr)}
}

/* ── Cookie Banner ──────────────────────────────────────────── */
#cookie-banner{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);z-index:9999;width:min(680px,calc(100vw - 32px));background:rgba(14,20,27,.96);border:1px solid rgba(0,208,228,.18);border-radius:16px;padding:28px 32px;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:0 8px 40px rgba(0,0,0,.55);opacity:0;transition:opacity .4s ease,transform .4s ease;pointer-events:none}
#cookie-banner.cb-show{opacity:1;transform:translateX(-50%) translateY(0);pointer-events:auto}
#cookie-banner p{color:rgba(255,255,255,.78);font-size:.86rem;line-height:1.65;margin:0 0 8px}
#cookie-banner p:last-of-type{margin-bottom:0}
#cookie-banner a{color:var(--c3-cyan);text-decoration:underline}
.cb-btns{display:flex;gap:12px;margin-top:22px;justify-content:flex-end}
.cb-btn{padding:10px 28px;border-radius:8px;font-size:.88rem;font-weight:600;cursor:pointer;transition:opacity .2s,background .2s;font-family:inherit}
.cb-btn:hover{opacity:.85}
.cb-btn-accept{background:var(--c3-cyan);color:#000;border:none}
.cb-btn-decline{background:transparent;color:rgba(255,255,255,.72);border:1px solid rgba(255,255,255,.22)}
@media(max-width:600px){
  #cookie-banner{padding:20px 18px;bottom:12px;border-radius:12px}
  .cb-btns{flex-direction:column-reverse;gap:8px}
  .cb-btn{width:100%;text-align:center}
}