/* ==========================================================================
   Silvertip — main.css
   Design tokens, layout, components, motion.
   Brand: navy/blue/green on paper white · Spectral (serif) + Hanken Grotesk
   ========================================================================== */

:root{
  --navy:#1d305f;
  --navy-deep:#131f3d;
  --navy-ink:#16243f;
  --blue:#39a4db;
  --green:#13b14f;
  --paper:#fbfcfd;
  --paper-warm:#f4f7f9;
  --ink:#1d305f;
  --muted:#5d6c84;
  --line:#dde4ec;
  --maxw:1180px;
  --maxw-wide:1440px;
  --ease-out:cubic-bezier(.2,.7,.2,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scrollbar-width:none}
::-webkit-scrollbar{display:none}
body{
  font-family:'Hanken Grotesk',-apple-system,'Segoe UI',sans-serif;
  color:var(--ink);
  background:var(--paper);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3{font-family:'Spectral',Georgia,serif;font-weight:500;line-height:1.08;letter-spacing:-.01em}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 32px}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto}

/* accessibility ------------------------------------------------------------ */
.skip-link{
  position:absolute;left:16px;top:-60px;z-index:100;
  background:var(--navy);color:#fff;padding:10px 18px;border-radius:0 0 8px 8px;
  font-size:.9rem;font-weight:600;transition:top .2s;
}
.skip-link:focus{top:0}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:2px}
.btn:focus-visible,.nav-cta:focus-visible{outline-offset:4px}

/* tri-color rule motif ------------------------------------------------------ */
.rule{height:3px;width:64px;border-radius:3px;flex:none;
  background:linear-gradient(90deg,var(--navy) 0 40%,var(--blue) 40% 72%,var(--green) 72% 100%)}
.eyebrow{font-size:.78rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--blue);margin-bottom:18px;display:flex;align-items:center;gap:14px}
.eyebrow.on-dark{color:#7fc7ec}
.eyebrow.center{justify-content:center}
/* rule draws in when its .reveal parent enters */
.js .reveal .rule{width:0;transition:width .9s var(--ease-out) .15s}
.js .reveal.in .rule{width:64px}

/* ==========================================================================
   NAV
   ========================================================================== */
header{position:fixed;top:0;left:0;right:0;z-index:50;padding:22px 0;
  transition:background .35s ease,box-shadow .35s ease,padding .35s ease}
header.scrolled{background:rgba(19,31,61,.92);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);box-shadow:0 1px 0 rgba(255,255,255,.06);padding:14px 0}
.nav{display:flex;align-items:center;justify-content:space-between}
.nav-logo img{height:40px;width:auto;display:block;filter:drop-shadow(0 1px 6px rgba(0,0,0,.25))}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{color:#fff;font-size:.88rem;font-weight:500;letter-spacing:.01em;opacity:.85;transition:opacity .2s;white-space:nowrap;position:relative;padding:4px 0}
.nav-links a:not(.nav-cta)::after{
  content:"";position:absolute;left:0;right:100%;bottom:0;height:1.5px;
  background:linear-gradient(90deg,var(--blue),var(--green));
  transition:right .3s var(--ease-out);
}
.nav-links a:not(.nav-cta):hover::after,
.nav-links a:not(.nav-cta):focus-visible::after{right:0}
.nav-links a:hover{opacity:1}
.nav-cta{border:1px solid rgba(255,255,255,.45);padding:9px 22px;border-radius:100px;transition:background .25s,border-color .25s,color .25s}
.nav-cta:hover{background:#fff;color:var(--navy)!important;border-color:#fff;opacity:1!important}
.burger{display:none;background:none;border:0;cursor:pointer;flex-direction:column;gap:5px;padding:6px}
.burger span{width:24px;height:2px;background:#fff;display:block;transition:.3s}

/* ==========================================================================
   HERO
   ========================================================================== */
.hero{position:relative;min-height:100svh;display:flex;align-items:center;color:#fff;isolation:isolate;overflow:hidden}
.hero-media{position:absolute;inset:0;z-index:-2}
.hero-img{width:100%;height:100%;object-fit:cover;object-position:center 35%;display:block;position:absolute;inset:0}
.js .hero-img{animation:kenburns 22s var(--ease-out) forwards;transform-origin:52% 40%}
@keyframes kenburns{from{transform:scale(1.09)}to{transform:scale(1)}}
.hero-scrim{position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(19,31,61,.94) 0%,rgba(19,31,61,.78) 38%,rgba(19,31,61,.30) 75%,rgba(19,31,61,.15) 100%)}
.hero-inner{padding:150px 0 110px;max-width:780px}
.hero-kicker{margin-bottom:26px}
.hero h1{font-size:clamp(2.7rem,6.6vw,6rem);font-weight:500;margin:0 0 26px}
.hero h1 .lighter{font-weight:400;color:#a8d8f2;font-size:.6em;margin-top:.22em}
.hero-cta{display:flex;gap:16px;margin-top:40px;flex-wrap:wrap}

/* masked line-by-line headline reveal */
.hero h1 .line{display:block;overflow:hidden;padding-bottom:.08em;margin-bottom:-.08em}
.hero h1 .line>span{display:inline-block}
.js .reveal-line>span{transform:translateY(112%);transition:transform 1s var(--ease-out)}
.js .reveal-line.in>span{transform:none}
.js .reveal-line:nth-child(1)>span{transition-delay:.10s}
.js .reveal-line:nth-child(2)>span{transition-delay:.22s}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:10px;font-weight:600;font-size:.98rem;padding:15px 30px;border-radius:100px;
  transition:transform .2s,box-shadow .25s,background .25s,border-color .25s}
.btn .arr{display:inline-block;transition:transform .25s var(--ease-out)}
.btn:hover .arr{transform:translateX(5px)}
.btn-primary{background:#fff;color:var(--navy)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(0,0,0,.28)}
.btn-ghost{border:1px solid rgba(255,255,255,.5);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}

.scroll-cue{position:absolute;bottom:34px;left:50%;transform:translateX(-50%);color:rgba(255,255,255,.6);font-size:.74rem;letter-spacing:.2em;text-transform:uppercase;display:flex;flex-direction:column;align-items:center;gap:10px}
.scroll-cue::after{content:"";width:1px;height:34px;background:linear-gradient(rgba(255,255,255,.7),transparent);animation:cue 2.2s ease-in-out infinite}
@keyframes cue{0%,100%{opacity:.3;transform:scaleY(.6)}50%{opacity:1;transform:scaleY(1)}}

/* ==========================================================================
   SECTIONS
   ========================================================================== */
section{padding:120px 0}
.sec-head{max-width:680px;margin-bottom:60px}
.sec-head h2{font-size:clamp(2rem,3.9vw,3.6rem);margin:20px 0 22px}
.sec-head p{color:var(--muted);font-size:1.12rem}

/* mission — editorial two-column band, paper background */
.mission{background:var(--paper);padding-bottom:60px}
.about{padding-top:60px}
.mission-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:70px;align-items:start}
.mission-grid h2{font-size:clamp(2rem,3.7vw,3.5rem)}
.mission-body p{font-size:clamp(1.16rem,1.05vw,1.35rem);color:#33415c;margin-bottom:22px}
.mission-body p:last-child{margin-bottom:0}

/* about */
.about-banner{background:var(--navy);color:#fff;border-radius:18px;padding:38px 48px;margin-top:22px;display:flex;align-items:center;gap:36px;position:relative;overflow:hidden}
.about-banner::after{content:"";position:absolute;left:0;right:0;bottom:0;height:5px;
  background:linear-gradient(90deg,var(--navy),var(--blue) 55%,var(--green))}
.about-banner .big{font-family:'Spectral',serif;font-size:3.4rem;line-height:1;flex:none}
.about-banner .big em{font-style:normal;color:var(--blue)}
.about-banner .cap{color:#bccadf;font-size:1.05rem;max-width:520px}
@media(min-width:920px){
  .about-banner .cap{max-width:none;white-space:nowrap;font-size:clamp(.82rem,1.4vw,1.25rem)}
}
.team-block{margin-top:100px}
.team-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:64px}
.team-card{border:1px solid var(--line);border-radius:14px;padding:26px 22px;display:flex;flex-direction:column;background:#fff;
  transition:border-color .25s,box-shadow .25s,transform .25s var(--ease-out)}
.team-card:hover{border-color:var(--blue);box-shadow:0 14px 34px rgba(20,60,110,.10);transform:translateY(-4px)}
.team-card .name{font-family:'Spectral',serif;font-size:1.2rem;color:var(--navy);margin-bottom:4px}
.team-card .title{color:var(--muted);font-size:.9rem;line-height:1.4;margin-bottom:16px}
.team-card .li-link{font-size:.85rem;font-weight:600;color:var(--blue);display:inline-flex;align-items:center;gap:6px;margin-top:auto}
.team-card .li-link .arr{transition:transform .25s var(--ease-out)}
.team-card .li-link:hover .arr{transform:translateX(4px)}
.team-card .li-link:hover{text-decoration:underline}

/* contact */
.contact{background:var(--navy-deep);color:#fff;text-align:center}
.contact h2{font-size:clamp(2rem,4.3vw,3.75rem);margin-bottom:18px}
.contact h2 em{font-style:italic;color:#9fd5f3}
.contact>.wrap>p{color:#aebcd2;font-size:clamp(1.12rem,1vw,1.3rem);max-width:520px;margin:0 auto 40px}
.contact-card{display:inline-flex;flex-direction:column;align-items:center;gap:6px;margin-top:8px}
.contact-card .name{font-family:'Spectral',serif;font-size:1.5rem}
.contact-card .role{color:#8fa0bc;font-size:.95rem;margin-bottom:22px}

/* footer */
footer{background:#0f1830;color:#fff;padding:64px 0 40px}
.foot{display:flex;justify-content:space-between;align-items:flex-start;gap:40px;flex-wrap:wrap}
footer img{height:44px;width:auto;margin-bottom:18px}
footer .tag{color:#8c9bb6;max-width:300px;font-size:.96rem}
.foot-bottom{margin-top:48px;padding-top:24px;border-top:1px solid rgba(255,255,255,.08);display:flex;justify-content:space-between;color:#8695ad;font-size:.82rem;flex-wrap:wrap;gap:10px}

/* ==========================================================================
   MOTION — scroll reveals
   ========================================================================== */
.js .reveal{opacity:0;transform:translateY(28px);transition:opacity .8s var(--ease-out),transform .8s var(--ease-out)}
.js .reveal.in{opacity:1;transform:none}
.d1{transition-delay:.08s}.d2{transition-delay:.16s}.d3{transition-delay:.24s}.d4{transition-delay:.32s}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media(max-width:1023px){
  .team-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .nav-links{position:fixed;inset:0 0 0 auto;width:78%;max-width:320px;background:var(--navy-deep);flex-direction:column;justify-content:center;align-items:flex-start;gap:8px;padding:40px 36px;transform:translateX(100%);transition:transform .35s ease;box-shadow:-20px 0 60px rgba(0,0,0,.4);visibility:hidden}
  .nav-links.open{transform:none;visibility:visible}
  .nav-links a{font-size:1.15rem;padding:10px 0}
  .nav-cta{margin-top:14px}
  .burger{display:flex;z-index:60}
  .burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .burger.open span:nth-child(2){opacity:0}
  .burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .mission-grid{grid-template-columns:1fr;gap:40px}
  .about-banner{flex-direction:column;align-items:flex-start;text-align:left;gap:16px;padding:32px}
  section{padding:84px 0}
}
@media(max-width:520px){
  .wrap{padding:0 20px}
  .nav-logo img{height:32px}
  .hero-cta .btn{width:100%;justify-content:center}
}
@media(max-width:380px){
  .hero-inner{padding:120px 0 90px}
  .about-banner .big{font-size:2.6rem}
  .team-grid{grid-template-columns:1fr}
}

/* ==========================================================================
   WIDE-SCREEN SCALING — content column and type keep growing on big monitors
   instead of plateauing at --maxw:1180px
   ========================================================================== */
@media (min-width:1600px){
  :root{--maxw:var(--maxw-wide);}
  html{font-size:1.15rem;}
}
@media (min-width:2000px){
  :root{--maxw:1680px;}
  html{font-size:1.25rem;}
}

/* ==========================================================================
   REDUCED MOTION — every animation opts out
   ========================================================================== */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .js .reveal,.js .reveal-line>span{opacity:1;transform:none;transition:none}
  .js .reveal .rule{width:64px;transition:none}
  .js .hero-img{animation:none}
  .scroll-cue::after{animation:none}
  .btn,.team-card,.aud-card,.work-item .n,.arr{transition:none}
  .btn-primary:hover,.team-card:hover,.aud-card:hover{transform:none}
}