/* Interline Freight Partners — corporate / institutional design system.
   Spectral (serif headings) + Inter (body UI). Navy with a muted-gold accent, white with generous space. */
:root{
  --ink:#16222E; --navy:#0E2A47; --navy-700:#143659; --navy-900:#091D33;
  --gold:#B5873A; --gold-700:#7B6230; --gold-bright:#D8AD53;
  --paper:#FFFFFF; --mist:#F5F6F8; --line:#E4E7EC; --hair:#EDEFF2; --muted:#5B6673;
  --serif:"Spectral",Georgia,"Times New Roman",serif;
  --sans:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0}
body{font-family:var(--sans);color:var(--ink);background:var(--paper);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%}

h1,h2,h3{font-family:var(--serif);color:var(--navy);font-weight:600;line-height:1.16;margin:0}
h1{font-size:clamp(34px,5.2vw,54px);font-weight:700;letter-spacing:-.01em}
h2{font-size:clamp(24px,3.3vw,32px)}
h3{font-size:19px}
p{margin:0 0 14px}

/* mark — navy + muted gold interlock */
.mk{display:block}
.mk .lk{fill:none;stroke-width:7;stroke-linecap:round}
.mk .lk-a{stroke:var(--navy)} .mk .lk-b{stroke:var(--gold)}
footer .mk .lk-a{stroke:#fff}

/* header — white corporate bar */
header{background:#fff;border-top:3px solid var(--gold);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:100;display:flex;align-items:center;gap:30px;padding:0 clamp(20px,5vw,40px);height:72px}
header .brand{display:flex;align-items:center;gap:13px}
header .brand .mk{width:40px;height:24px}
header .brand b{font-family:var(--sans);font-weight:700;font-size:18px;letter-spacing:.09em;color:var(--navy)}
header .brand span{font-family:var(--sans);font-weight:400;font-size:13px;color:var(--muted);border-left:1px solid var(--line);padding-left:13px}
header nav{display:flex;gap:28px;margin-left:14px}
header nav a{font-size:15px;font-weight:500;color:var(--ink);padding:4px 0;border-bottom:2px solid transparent}
header nav a:hover{color:var(--gold-700);border-bottom-color:var(--gold)}
.hdr-cta{margin-left:auto;background:var(--navy);color:#fff;font-weight:600;font-size:14px;padding:10px 18px;border-radius:3px}
.hdr-cta:hover{background:var(--navy-700)}
@media(max-width:760px){header nav{display:none}.hdr-cta{margin-left:auto}}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:15px;padding:13px 26px;border-radius:3px;cursor:pointer;border:1.5px solid var(--navy);background:var(--navy);color:#fff}
.btn:hover{background:var(--navy-700);border-color:var(--navy-700)}
.btn.accent{background:var(--gold);border-color:var(--gold)}
.btn.accent:hover{background:var(--gold-700);border-color:var(--gold-700)}
.btn.ghost{background:transparent;color:var(--navy)}
.btn.ghost:hover{background:var(--mist)}
.btn.ghost-light{background:transparent;border-color:rgba(255,255,255,.55);color:#fff}
.btn.ghost-light:hover{background:rgba(255,255,255,.1);border-color:#fff}
.cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}

/* hero — navy with a faint brand watermark */
.hero{background:var(--navy);color:#fff;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-70px;top:50%;transform:translateY(-50%);width:600px;height:340px;opacity:.06;pointer-events:none;background:no-repeat center/contain url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 92 48"><path d="M 40.69 40.71 A 18 18 0 1 1 49.86 32.51" fill="none" stroke="%23ffffff" stroke-width="7" stroke-linecap="round"/><path d="M 51.31 7.29 A 18 18 0 1 1 42.14 15.49" fill="none" stroke="%23ffffff" stroke-width="7" stroke-linecap="round"/></svg>')}
.hero-in{position:relative;z-index:1;max-width:1120px;margin:0 auto;padding:clamp(52px,7vw,86px) clamp(20px,5vw,40px);display:grid;grid-template-columns:1.25fr .75fr;gap:56px;align-items:center}
@media(max-width:820px){.hero-in{grid-template-columns:1fr;gap:40px}}
.overline{font-size:13px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--gold-700);margin-bottom:16px}
.hero .overline{color:var(--gold-bright)}
.hero h1{max-width:16ch;color:#fff}
.hero-copy>p{font-size:clamp(17px,1.9vw,19px);color:rgba(255,255,255,.82);max-width:52ch;margin:20px 0 0}

/* at-a-glance facts panel */
.facts-panel{background:#fff;border:1px solid var(--line);border-top:3px solid var(--gold);box-shadow:0 24px 60px rgba(0,0,0,.26)}
.fp-head{font-family:var(--serif);font-size:18px;color:var(--navy);font-weight:600;padding:18px 22px 6px}
.facts-panel dl{margin:0;padding:0 22px 12px}
.facts-panel dl>div{display:flex;justify-content:space-between;gap:16px;padding:12px 0;border-top:1px solid var(--hair)}
.facts-panel dt{color:var(--muted);font-size:14px}
.facts-panel dd{margin:0;font-weight:600;font-size:15px;text-align:right;color:var(--ink)}
.facts-panel dd.status{color:var(--gold-700)}

/* sections */
.block{max-width:1120px;margin:0 auto;padding:clamp(46px,6vw,74px) clamp(20px,5vw,40px);border-bottom:1px solid var(--line)}
.block:last-child{border-bottom:0}
.sect-head{margin-bottom:22px}
.sect-head h2{position:relative;padding-top:20px}
.sect-head h2::before{content:"";position:absolute;top:0;left:0;width:46px;height:3px;background:var(--gold)}
.body-copy{color:var(--muted);font-size:17px;max-width:72ch;margin:0}

/* about — corporate three-up */
.deflist{margin-top:30px;display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
@media(max-width:760px){.deflist{grid-template-columns:1fr;gap:0}}
.deflist>div{border-top:2px solid var(--navy);padding-top:16px}
.deflist dt{font-family:var(--serif);font-size:20px;color:var(--navy);font-weight:600;margin-bottom:7px}
.deflist dd{margin:0;color:var(--muted);font-size:15px}
@media(max-width:760px){.deflist>div{border-top:1px solid var(--line);padding:20px 0}.deflist>div:first-child{border-top:2px solid var(--navy)}}

/* members */
.roster{margin-top:28px;display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
@media(max-width:860px){.roster{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.roster{grid-template-columns:1fr}}
.mcard{display:block;background:#fff;border:1px solid var(--line);border-top:3px solid var(--gold);min-height:172px;color:inherit;text-decoration:none;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.mcard:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(14,42,71,.12)}
.mcard.open{border-top-color:var(--line);background:var(--mist)}
.mcard.open:hover{border-top-color:var(--gold);box-shadow:0 10px 24px rgba(14,42,71,.08)}
.mcard .tab{display:none}
.mcard-in{padding:22px 20px;display:flex;flex-direction:column;gap:9px;height:100%}
.mlogo{width:52px;height:52px;border-radius:8px;display:grid;place-items:center;font-weight:800;font-size:16px;color:#fff;background:var(--navy)}
.mlogo-open{background:#fff;border:1px dashed var(--line);color:var(--muted);font-size:22px}
.mlogo.has-img{background:none;border:0}
.mlogo.has-img img{width:52px;height:52px;border-radius:8px;object-fit:cover}
.mname{font-family:var(--serif);font-weight:600;font-size:18px;color:var(--navy);line-height:1.2}
.mdesc{font-size:13.5px;color:var(--muted)}
.mrole{margin-top:auto;font-size:12px;font-weight:600;letter-spacing:.04em;color:var(--gold-700)}
.mcard.open .mrole{color:var(--muted)}

/* interline relay — light corporate diagram */
.dispatch{margin-top:26px;border:1px solid var(--line);background:#fff}
.dispatch-head{border-bottom:1px solid var(--line);padding:16px 24px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;align-items:baseline}
.dh-code{font-family:var(--serif);font-weight:600;color:var(--navy);font-size:17px}
.dh-note{color:var(--muted);font-size:14px}
.relay{display:flex;align-items:flex-start;padding:36px 28px}
.stop{flex:none;width:132px;text-align:center}
.stop .icao{font-weight:700;font-size:26px;letter-spacing:.02em;color:var(--navy)}
.stop.hub .icao{color:var(--gold-700)}
.st-city{font-family:var(--serif);font-size:16px;color:var(--ink);margin-top:4px}
.st-role{font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);margin-top:5px}
.stop.hub .st-role{color:var(--gold-700)}
.leg{flex:1;min-width:60px;height:1px;background:var(--navy);position:relative;margin-top:21px}
.leg.v{background:var(--gold)}
.leg::after{content:"";position:absolute;right:-1px;top:-4px;border-left:8px solid var(--navy);border-top:4.5px solid transparent;border-bottom:4.5px solid transparent}
.leg.v::after{border-left-color:var(--gold)}
.leg span{position:absolute;left:50%;top:-22px;transform:translateX(-50%);font-size:11px;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);white-space:nowrap}
.dispatch-foot{border-top:1px solid var(--line);padding:16px 24px;color:var(--muted);font-size:14.5px}
@media(max-width:640px){
  .relay{flex-direction:column;align-items:flex-start;padding:24px}
  .stop{width:auto;text-align:left;display:flex;align-items:baseline;gap:10px}
  .stop .icao{font-size:23px}.st-role{margin-top:0}
  .leg{width:1px;height:34px;min-width:0;margin:6px 0 6px 42px}
  .leg::after{right:-4px;top:auto;bottom:-1px;border-left:4.5px solid transparent;border-right:4.5px solid transparent;border-top:8px solid var(--navy);border-bottom:0}
  .leg.v::after{border-top-color:var(--gold);border-left-color:transparent}
  .leg span{top:50%;left:14px;transform:translateY(-50%)}
}

/* commitments — navy panel */
.pledge{margin-top:0;background:var(--navy);color:#fff;padding:clamp(26px,4vw,38px)}
.never{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr}
@media(max-width:620px){.never{grid-template-columns:1fr}}
.never li{padding:14px 18px 14px 30px;position:relative;font-size:15px;border-bottom:1px solid rgba(255,255,255,.12)}
.never li::before{content:"";position:absolute;left:14px;top:21px;width:7px;height:2px;background:var(--gold)}
.pledge-foot{margin:18px 0 0;color:rgba(255,255,255,.72);font-size:14.5px;max-width:72ch}

/* plain lists (requirements, charter) */
.plainlist{margin-top:20px;padding:0;list-style:none;max-width:72ch}
.plainlist li{position:relative;padding:13px 0 13px 24px;border-bottom:1px solid var(--line);font-size:15.5px}
.plainlist li::before{content:"";position:absolute;left:2px;top:20px;width:7px;height:7px;border-radius:50%;background:var(--gold)}

/* faq */
.faq{margin-top:20px}
.faq>div{padding:20px 0;border-bottom:1px solid var(--line)}
.faq>div:first-child{border-top:1px solid var(--line)}
.faq dt{font-family:var(--serif);font-weight:600;font-size:19px;color:var(--navy);margin-bottom:6px}
.faq dd{margin:0;color:var(--muted);font-size:15.5px;max-width:74ch}

/* join band */
.join{background:var(--navy);color:#fff}
.join-in{max-width:1120px;margin:0 auto;padding:clamp(52px,7vw,82px) clamp(20px,5vw,40px);text-align:center}
.join h2{color:#fff}
.join p{color:rgba(255,255,255,.8);font-size:17px;max-width:52ch;margin:16px auto 0}
.join .cta{justify-content:center}

/* charter title band */
.charter-hero{background:var(--navy);color:#fff}
.ch-in{max-width:1120px;margin:0 auto;padding:clamp(48px,6vw,76px) clamp(20px,5vw,40px)}
.charter-hero h1{color:#fff}
.charter-hero p{color:rgba(255,255,255,.82);font-size:18px;max-width:64ch;margin:16px 0 0}
.doc-ref{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--gold);margin-bottom:14px}

/* charter steps */
.steps{margin-top:26px;list-style:none;padding:0;border-left:1px solid var(--line);margin-left:16px}
.steps li{position:relative;padding:0 0 28px 30px}
.steps li:last-child{padding-bottom:0}
.steps li::before{content:attr(data-n);position:absolute;left:-16px;top:-3px;width:32px;height:32px;border-radius:50%;background:#fff;border:1.5px solid var(--navy);color:var(--navy);display:grid;place-items:center;font-family:var(--serif);font-weight:600;font-size:14px}
.steps li h3{margin:3px 0 5px;font-size:18px}
.steps li p{margin:0;color:var(--muted);font-size:15px;max-width:66ch}

/* footer */
footer{background:var(--navy-900);color:#fff}
.foot-in{max-width:1120px;margin:0 auto;padding:40px clamp(20px,5vw,40px)}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.foot-brand .mk{width:36px;height:22px}
.foot-brand b{font-weight:700;letter-spacing:.07em;font-size:15px}
.foot-dis{color:rgba(255,255,255,.55);font-size:12.5px;line-height:1.7;max-width:80ch;margin:0}
.foot-ref{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:18px;padding-top:16px;border-top:1px solid rgba(255,255,255,.12);font-size:11.5px;letter-spacing:.06em;color:rgba(255,255,255,.42)}

/* ---- motion & interaction (the spark) ---- */
.btn,.hdr-cta{transition:background .15s ease,border-color .15s ease,transform .15s ease,box-shadow .15s ease}
.btn:hover,.hdr-cta:hover{transform:translateY(-1px)}
.btn.accent:hover{box-shadow:0 8px 20px rgba(181,135,58,.3)}
@keyframes rise{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.hero-copy>*{animation:rise .6s cubic-bezier(.2,.7,.3,1) backwards}
.hero-copy>.overline{animation-delay:.03s}
.hero-copy>h1{animation-delay:.1s}
.hero-copy>p{animation-delay:.18s}
.hero-copy>.cta{animation-delay:.26s}
.facts-panel{animation:rise .6s cubic-bezier(.2,.7,.3,1) .32s backwards}
@media(prefers-reduced-motion:reduce){
  .hero-copy>*,.facts-panel{animation:none}
  .btn:hover,.hdr-cta:hover,.mcard:hover{transform:none}
}