/* ============================================================
   BEMIHUB SKYHI — Aeronautical chart design system
   Palette derived from ICAO sectional chart conventions:
   controlled-airspace magenta, airspace zone greens/ambers/reds,
   avionics night-mode navy, chart paper.
   ============================================================ */

:root{
  --paper:#E9EDEF;
  --paper-2:#F4F7F8;
  --paper-3:#FFFFFF;
  --navy:#081B25;
  --navy-2:#0F2B39;
  --navy-3:#16394A;
  --ink:#0D1F29;
  --muted:#5A7080;
  --muted-2:#8296A3;
  --rule:#C2CED5;
  --rule-dark:#22485C;
  --magenta:#A81E6E;
  --magenta-lt:#D4569E;
  --zgreen:#2C7A57;
  --zamber:#BE860F;
  --zred:#A5322A;

  --f-display:"Barlow Condensed",Impact,sans-serif;
  --f-body:"IBM Plex Sans",system-ui,-apple-system,sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,monospace;

  --wrap:1180px;
  --gut:clamp(20px,4vw,48px);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--f-body);font-size:16.5px;line-height:1.65;
  font-weight:400;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit}

.wrap{max-width:var(--wrap);margin:0 auto;padding-inline:var(--gut)}

/* ---------- type ---------- */
h1,h2,h3,h4{font-family:var(--f-display);font-weight:700;line-height:1.02;
  letter-spacing:-0.005em;margin:0;text-wrap:balance}
h1{font-size:clamp(2.7rem,6.6vw,5.1rem);text-transform:uppercase}
h2{font-size:clamp(2rem,4.2vw,3.1rem);text-transform:uppercase}
h3{font-size:clamp(1.35rem,2.2vw,1.75rem)}
h4{font-size:1.12rem;font-family:var(--f-body);font-weight:600;letter-spacing:0}
p{margin:0 0 1.05em}
.lede{font-size:clamp(1.05rem,1.7vw,1.24rem);line-height:1.6;color:var(--muted);max-width:64ch}

.eyebrow{
  font-family:var(--f-mono);font-size:.7rem;font-weight:500;
  letter-spacing:.19em;text-transform:uppercase;color:var(--magenta);
  display:flex;align-items:center;gap:.7rem;margin:0 0 1.1rem
}
.eyebrow::after{content:"";flex:1;height:1px;background:var(--rule);max-width:150px}
.eyebrow--solo::after{display:none}

.mono{font-family:var(--f-mono);font-size:.78rem;letter-spacing:.05em}

/* ---------- credential strip ---------- */
.topbar{background:var(--navy);color:#94AEBC;font-family:var(--f-mono);
  font-size:.68rem;letter-spacing:.09em;border-bottom:1px solid var(--rule-dark)}
.topbar .wrap{display:flex;flex-wrap:wrap;gap:.4rem 1.6rem;
  align-items:center;justify-content:space-between;padding-block:.5rem}
.topbar .set{display:flex;flex-wrap:wrap;gap:.4rem 1.4rem}
.topbar b{color:#DCE7EC;font-weight:500}
.topbar a{color:#94AEBC;text-decoration:none}
.topbar a:hover{color:var(--magenta-lt)}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:60;background:rgba(233,237,239,.94);
  backdrop-filter:blur(9px);border-bottom:1px solid var(--rule)}
.nav .wrap{display:flex;align-items:center;gap:1.4rem;
  justify-content:space-between;padding-block:.75rem}
.brand{display:flex;align-items:baseline;gap:.55rem;text-decoration:none;flex-shrink:0}
.brand .bm{font-family:var(--f-display);font-weight:700;font-size:1.5rem;
  letter-spacing:.02em;text-transform:uppercase;color:var(--ink)}
.brand .sk{font-family:var(--f-display);font-weight:600;font-size:1.5rem;
  text-transform:uppercase;color:var(--magenta)}
.navlinks{display:flex;gap:1.35rem;align-items:center;list-style:none;margin:0;padding:0}
.navlinks a{font-size:.86rem;font-weight:500;text-decoration:none;color:var(--ink);
  padding-block:.35rem;border-bottom:2px solid transparent}
.navlinks a:hover,.navlinks a[aria-current="page"]{border-bottom-color:var(--magenta);color:var(--magenta)}
.navtoggle{display:none;background:none;border:1px solid var(--rule);
  border-radius:2px;padding:.4rem .6rem;font-family:var(--f-mono);
  font-size:.72rem;letter-spacing:.1em;cursor:pointer;color:var(--ink)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:.55rem;text-decoration:none;
  font-family:var(--f-mono);font-size:.76rem;font-weight:500;letter-spacing:.12em;
  text-transform:uppercase;padding:.85rem 1.5rem;border-radius:1px;
  border:1px solid var(--magenta);background:var(--magenta);color:#fff;
  transition:background .18s ease,color .18s ease,border-color .18s ease}
.btn:hover{background:#8A1359;border-color:#8A1359}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn--ghost:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.btn--onDark{background:transparent;color:#E4EDF1;border-color:#4A6C7D}
.btn--onDark:hover{background:#E4EDF1;color:var(--navy);border-color:#E4EDF1}
.btnrow{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:1.9rem}

/* ---------- sections ---------- */
.sec{padding-block:clamp(58px,8vw,104px)}
.sec--tight{padding-block:clamp(40px,5vw,64px)}
.sec--dark{background:var(--navy);color:#CBDBE3}
.sec--dark h2,.sec--dark h3{color:#F2F7F9}
.sec--dark .lede{color:#93AEBC}
.sec--dark .eyebrow{color:var(--magenta-lt)}
.sec--dark .eyebrow::after{background:var(--rule-dark)}
.sec--paper2{background:var(--paper-2)}
.sechead{max-width:70ch;margin-bottom:clamp(30px,4vw,52px)}

/* ---------- SIGNATURE: airspace ruler ---------- */
.ruler{position:relative;border-top:1px solid var(--rule);
  border-bottom:1px solid var(--rule);background:
   repeating-linear-gradient(90deg,transparent 0 39px,var(--rule) 39px 40px);
  height:52px;margin:0}
.ruler--dark{border-color:var(--rule-dark);
  background:repeating-linear-gradient(90deg,transparent 0 39px,#1D4356 39px 40px)}
.ruler span{position:absolute;top:50%;transform:translateY(-50%);
  background:var(--paper);padding-inline:.8rem;font-family:var(--f-mono);
  font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;color:var(--muted)}
.ruler--dark span{background:var(--navy);color:#7D9AA9}
.ruler .l{left:var(--gut)}
.ruler .r{right:var(--gut);color:var(--magenta)}

/* ---------- hero ---------- */
.hero{background:var(--navy);color:#DCE8ED;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(168,30,110,.16),transparent 46%),
    repeating-linear-gradient(0deg,transparent 0 79px,rgba(120,160,180,.09) 79px 80px),
    repeating-linear-gradient(90deg,transparent 0 79px,rgba(120,160,180,.09) 79px 80px);
  pointer-events:none}
.hero .wrap{position:relative;z-index:2;padding-block:clamp(60px,9vw,118px)}
.hero h1{color:#fff;max-width:16ch}
.hero h1 em{font-style:normal;color:var(--magenta-lt);display:block}
.hero .lede{color:#9FBBC9;margin-top:1.5rem;max-width:56ch}
.hero-flag{font-family:var(--f-mono);font-size:.7rem;letter-spacing:.2em;
  text-transform:uppercase;color:var(--magenta-lt);margin-bottom:1.5rem;
  display:flex;align-items:center;gap:.65rem}
.hero-flag::before{content:"";width:8px;height:8px;background:var(--magenta);
  border-radius:50%;box-shadow:0 0 0 4px rgba(168,30,110,.25);
  animation:beacon 2.6s ease-in-out infinite}
@keyframes beacon{0%,100%{opacity:1}50%{opacity:.25}}

/* ceiling line device */
.ceiling{position:relative;margin-top:clamp(38px,5vw,58px);
  border-top:1px dashed var(--magenta-lt);padding-top:.55rem;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:.5rem 1rem;
  font-family:var(--f-mono);font-size:.68rem;letter-spacing:.13em;
  text-transform:uppercase;color:#7FA0B1}
.ceiling b{color:var(--magenta-lt);font-weight:500}

/* ---------- grids ---------- */
.grid{display:grid;gap:clamp(16px,2.2vw,26px)}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,5vw,66px);align-items:start}

/* ---------- cards ---------- */
.card{background:var(--paper-3);border:1px solid var(--rule);border-radius:2px;
  padding:clamp(20px,2.6vw,30px);display:flex;flex-direction:column;gap:.55rem;
  transition:border-color .18s ease,transform .18s ease}
.card:hover{border-color:var(--magenta)}
a.card{text-decoration:none;color:inherit}
a.card:hover{transform:translateY(-2px)}
.card .tag{font-family:var(--f-mono);font-size:.66rem;letter-spacing:.16em;
  text-transform:uppercase;color:var(--magenta)}
.card h3{margin-bottom:.15rem}
.card p{color:var(--muted);font-size:.95rem;margin:0}
.card ul{margin:.4rem 0 0;padding-left:1.05rem;color:var(--muted);font-size:.92rem}
.card ul li{margin-bottom:.28rem}
.card .more{margin-top:auto;padding-top:.9rem;font-family:var(--f-mono);
  font-size:.71rem;letter-spacing:.13em;text-transform:uppercase;color:var(--magenta)}
.sec--dark .card{background:var(--navy-2);border-color:var(--rule-dark);color:#C6D8E1}
.sec--dark .card p,.sec--dark .card ul{color:#8FAAB9}
.sec--dark .card:hover{border-color:var(--magenta-lt)}

/* vertical cards carry a chart-style panel reference */
.card--vert{position:relative;padding-top:clamp(26px,3vw,34px)}
.card--vert .ref{position:absolute;top:0;left:0;background:var(--magenta);color:#fff;
  font-family:var(--f-mono);font-size:.63rem;letter-spacing:.15em;padding:.22rem .6rem}

/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:var(--rule-dark);border:1px solid var(--rule-dark)}
.stat{background:var(--navy);padding:clamp(18px,2.4vw,28px)}
.stat .n{font-family:var(--f-display);font-weight:700;font-size:clamp(1.9rem,3.4vw,2.7rem);
  color:#fff;line-height:1}
.stat .k{font-family:var(--f-mono);font-size:.67rem;letter-spacing:.14em;
  text-transform:uppercase;color:#7E9BAA;margin-top:.45rem}

/* ---------- airspace zone chips ---------- */
.zones{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.zone{border:1px solid var(--rule);border-left-width:5px;background:var(--paper-3);
  padding:1.05rem 1.15rem}
.zone .z{font-family:var(--f-mono);font-size:.68rem;letter-spacing:.15em;
  text-transform:uppercase;font-weight:500}
.zone p{font-size:.9rem;color:var(--muted);margin:.35rem 0 0}
.zone--g{border-left-color:var(--zgreen)} .zone--g .z{color:var(--zgreen)}
.zone--a{border-left-color:var(--zamber)} .zone--a .z{color:var(--zamber)}
.zone--r{border-left-color:var(--zred)}   .zone--r .z{color:var(--zred)}

/* ---------- audience router ---------- */
.router{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;
  background:var(--rule);border:1px solid var(--rule)}
.router a{background:var(--paper-3);padding:1.3rem 1.35rem;text-decoration:none;
  display:block;transition:background .16s ease}
.router a:hover{background:var(--navy);color:#EAF2F5}
.router .who{font-family:var(--f-mono);font-size:.66rem;letter-spacing:.15em;
  text-transform:uppercase;color:var(--magenta);margin-bottom:.4rem}
.router a:hover .who{color:var(--magenta-lt)}
.router .what{font-family:var(--f-display);font-weight:600;font-size:1.28rem;line-height:1.1}

/* ---------- placeholder token ---------- */
.ph{font-family:var(--f-mono);font-size:.73rem;letter-spacing:.06em;
  border:1px dashed var(--magenta);color:var(--magenta);
  background:rgba(168,30,110,.06);padding:.15rem .5rem;border-radius:2px;
  display:inline-block;white-space:nowrap}
.sec--dark .ph,.topbar .ph{color:var(--magenta-lt);border-color:var(--magenta-lt);
  background:rgba(212,86,158,.12)}

/* ---------- credential wall ---------- */
.creds{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;
  background:var(--rule);border:1px solid var(--rule)}
.cred{background:var(--paper-3);padding:1.15rem 1.3rem;display:flex;
  justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap}
.cred .k{font-weight:600;font-size:.94rem}
.cred .v{font-family:var(--f-mono);font-size:.8rem;color:var(--muted)}

/* ---------- tables ---------- */
.tbl{width:100%;border-collapse:collapse;font-size:.92rem;background:var(--paper-3)}
.tbl th,.tbl td{text-align:left;padding:.8rem 1rem;border:1px solid var(--rule);vertical-align:top}
.tbl th{font-family:var(--f-mono);font-size:.68rem;letter-spacing:.13em;
  text-transform:uppercase;background:var(--paper-2);font-weight:500;color:var(--ink)}
.tbl td{color:var(--muted)}
.tbl td strong{color:var(--ink);font-weight:600}
.scrollx{overflow-x:auto;-webkit-overflow-scrolling:touch}

/* ---------- lists ---------- */
.checks{list-style:none;margin:0;padding:0;display:grid;gap:.7rem}
.checks li{padding-left:1.65rem;position:relative;color:var(--muted);font-size:.96rem}
.checks li::before{content:"";position:absolute;left:0;top:.62em;width:9px;height:1px;
  background:var(--magenta)}
.checks li strong{color:var(--ink);font-weight:600}
.sec--dark .checks li{color:#93AEBC}
.sec--dark .checks li strong{color:#EAF2F5}

/* ---------- faq ---------- */
.faq{border-top:1px solid var(--rule)}
.faq details{border-bottom:1px solid var(--rule)}
.faq summary{cursor:pointer;padding:1.05rem 0;font-weight:600;font-size:1rem;
  list-style:none;display:flex;justify-content:space-between;gap:1rem;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--f-mono);color:var(--magenta);font-size:1.15rem}
.faq details[open] summary::after{content:"\2212"}
.faq details p{color:var(--muted);font-size:.95rem;padding-bottom:1.05rem;margin:0;max-width:78ch}

/* ---------- CTA band ---------- */
.cta{background:var(--magenta);color:#fff}
.cta .wrap{padding-block:clamp(44px,6vw,72px);display:grid;
  grid-template-columns:1.25fr .75fr;gap:2rem;align-items:center}
.cta h2{color:#fff;max-width:18ch}
.cta p{color:#F6DAEA;margin:.8rem 0 0;max-width:44ch}
.cta .btn{background:#fff;color:var(--magenta);border-color:#fff}
.cta .btn:hover{background:var(--navy);color:#fff;border-color:var(--navy)}
.cta .btn--ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.cta .btn--ghost:hover{background:#fff;color:var(--magenta);border-color:#fff}

/* ---------- forms ---------- */
.form{display:grid;gap:1rem;max-width:640px}
.field{display:grid;gap:.38rem}
.field label{font-family:var(--f-mono);font-size:.68rem;letter-spacing:.13em;
  text-transform:uppercase;color:var(--muted)}
.field input,.field select,.field textarea{
  font-family:var(--f-body);font-size:.96rem;padding:.72rem .85rem;
  border:1px solid var(--rule);border-radius:2px;background:var(--paper-3);color:var(--ink)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:2px solid var(--magenta);outline-offset:1px;border-color:var(--magenta)}
.field textarea{min-height:130px;resize:vertical}
.g2f{display:grid;grid-template-columns:1fr 1fr;gap:1rem}

/* ---------- footer ---------- */
.foot{background:var(--navy);color:#8AA7B6;font-size:.9rem}
.foot .wrap{padding-block:clamp(42px,5vw,64px)}
.footgrid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:2rem}
.foot h4{font-family:var(--f-mono);font-size:.68rem;letter-spacing:.15em;
  text-transform:uppercase;color:#E3EEF2;font-weight:500;margin-bottom:.9rem}
.foot ul{list-style:none;margin:0;padding:0;display:grid;gap:.45rem}
.foot a{color:#8AA7B6;text-decoration:none}
.foot a:hover{color:var(--magenta-lt)}
.foot .addr{color:#7C99A8;font-size:.88rem;line-height:1.7}
.footbase{border-top:1px solid var(--rule-dark);margin-top:2.4rem;padding-top:1.3rem;
  display:flex;flex-wrap:wrap;gap:.6rem 1.6rem;justify-content:space-between;
  font-family:var(--f-mono);font-size:.68rem;letter-spacing:.09em;color:#6D8A99}

/* ---------- whatsapp float ---------- */
.wa{position:fixed;right:16px;bottom:16px;z-index:80;background:var(--zgreen);
  color:#fff;text-decoration:none;font-family:var(--f-mono);font-size:.74rem;
  letter-spacing:.1em;text-transform:uppercase;padding:.8rem 1.05rem;border-radius:2px;
  box-shadow:0 6px 22px rgba(8,27,37,.3)}
.wa:hover{background:#23654a}

/* ---------- notice ---------- */
.notice{border:1px dashed var(--magenta);background:rgba(168,30,110,.05);
  padding:1.1rem 1.25rem;font-size:.92rem;color:var(--muted)}
.notice strong{color:var(--magenta);font-weight:600}

/* ---------- breadcrumb ---------- */
.crumb{font-family:var(--f-mono);font-size:.68rem;letter-spacing:.13em;
  text-transform:uppercase;color:var(--muted-2);padding-block:1.1rem}
.crumb a{color:var(--muted-2);text-decoration:none}
.crumb a:hover{color:var(--magenta)}

/* ---------- page hero (inner pages) ---------- */
.phero{background:var(--navy);color:#DCE8ED;position:relative;overflow:hidden}
.phero::before{content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(90deg,transparent 0 79px,rgba(120,160,180,.08) 79px 80px);
  pointer-events:none}
.phero .wrap{position:relative;z-index:2;padding-block:clamp(46px,6vw,80px)}
.phero h1{color:#fff;font-size:clamp(2.2rem,5vw,3.9rem);max-width:20ch}
.phero .lede{color:#9FBBC9;margin-top:1.2rem}

/* ---------- responsive ---------- */
@media(max-width:1000px){
  .navlinks{display:none;position:absolute;top:100%;left:0;right:0;
    background:var(--paper-2);border-bottom:1px solid var(--rule);
    flex-direction:column;align-items:stretch;gap:0;padding:.5rem var(--gut) 1rem}
  .navlinks.open{display:flex}
  .navlinks a{padding:.7rem 0;border-bottom:1px solid var(--rule)}
  .navtoggle{display:block}
  .nav .wrap{position:relative}
  .g4{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .footgrid{grid-template-columns:1fr 1fr}
  .split{grid-template-columns:1fr}
  .cta .wrap{grid-template-columns:1fr}
}
@media(max-width:720px){
  .g2,.g3,.g4{grid-template-columns:1fr}
  .zones,.router,.creds{grid-template-columns:1fr}
  .g2f{grid-template-columns:1fr}
  .footgrid{grid-template-columns:1fr}
  .topbar .set{gap:.3rem .9rem}
  .ruler{height:44px}
}

/* ---------- a11y ---------- */
a:focus-visible,button:focus-visible,summary:focus-visible{
  outline:2px solid var(--magenta);outline-offset:3px}
.skip{position:absolute;left:-9999px;top:0;background:var(--magenta);color:#fff;
  padding:.7rem 1.1rem;z-index:100;font-family:var(--f-mono);font-size:.75rem}
.skip:focus{left:0}
@media(prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;transition-duration:.01ms!important;
    scroll-behavior:auto!important}
}