/* ============================================================
   NearSpace Education — design system
   ============================================================ */

:root{
  --ink:#0A0B0D;
  --paper:#FFFFFF;
  --mist:#F5F7FA;
  --line:rgba(10,11,13,.10);
  --muted:#6B7280;
  --blue:#1C75BC;
  --blue-dim:#155F99;
  --blue-soft:rgba(28,117,188,.10);

  --nav-h:60px;
  --maxw:1160px;
  --pad:28px;
  --r-card:24px;
  --r-media:20px;

  --ease:cubic-bezier(.16,1,.3,1);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:17px;line-height:1.55;letter-spacing:-.011em;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit}

:focus-visible{outline:3px solid var(--blue);outline-offset:3px;border-radius:6px}

h1,h2,h3,h4{
  font-family:"Inter Tight",Inter,sans-serif;
  margin:0;line-height:1.04;letter-spacing:-.035em;font-weight:600;
}
h1{font-size:clamp(2.9rem,7.2vw,5.6rem);font-weight:600}
h2{font-size:clamp(2.2rem,5vw,3.9rem)}
h3{font-size:clamp(1.35rem,2.4vw,1.85rem);letter-spacing:-.025em}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--pad)}
.wrap-wide{max-width:1400px;margin:0 auto;padding:0 var(--pad)}
section{padding:clamp(72px,11vw,140px) 0}
.tight{padding-top:0}

/* ---------- color modes ---------- */
.mist{background:var(--mist)}
.dark{background:var(--ink);color:#fff}
.dark h1,.dark h2,.dark h3{color:#fff}
.dark .lede,.dark .sub{color:#9BA3AE}
.dark .rule{background:rgba(255,255,255,.16)}

/* ---------- type helpers ---------- */
.kicker{
  font-size:.82rem;font-weight:600;letter-spacing:.01em;color:var(--blue);
  margin:0 0 18px;
}
.dark .kicker{color:#5EA6E0}
.lede{
  font-size:clamp(1.08rem,2vw,1.35rem);line-height:1.5;color:var(--muted);
  max-width:60ch;margin:22px 0 0;font-weight:400;letter-spacing:-.015em;
}
.sub{font-size:1.05rem;color:var(--muted);margin:14px 0 0}
.prose p{font-size:1.08rem;line-height:1.65;color:#33383F;margin:0 0 22px;max-width:68ch}
.dark .prose p{color:#B6BDC6}
.prose p:last-child{margin-bottom:0}
.prose strong{font-weight:600;color:var(--ink)}
.dark .prose strong{color:#fff}
.center{text-align:center}
.center .lede{margin-left:auto;margin-right:auto}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:50px;padding:0 30px;border-radius:999px;border:1px solid transparent;
  font-size:1.02rem;font-weight:500;letter-spacing:-.01em;cursor:pointer;
  transition:transform .28s var(--ease),background .28s var(--ease),color .28s var(--ease),border-color .28s var(--ease);
  will-change:transform;
}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-dim);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--blue);border-color:rgba(28,117,188,.35)}
.btn-ghost:hover{background:var(--blue-soft);transform:translateY(-2px)}
.dark .btn-ghost{color:#fff;border-color:rgba(255,255,255,.3)}
.dark .btn-ghost:hover{background:rgba(255,255,255,.1)}
.btn:active{transform:translateY(0) scale(.98)}
.btn-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:38px}
.center .btn-row{justify-content:center}

.link-arrow{
  display:inline-flex;align-items:center;gap:7px;color:var(--blue);
  font-weight:500;font-size:1.03rem;
}
.link-arrow svg{transition:transform .3s var(--ease)}
.link-arrow:hover svg{transform:translateX(5px)}
.dark .link-arrow{color:#5EA6E0}

/* ---------- scroll progress ---------- */
.progress{
  position:fixed;top:0;left:0;height:2px;width:100%;transform:scaleX(0);
  transform-origin:0 50%;background:var(--blue);z-index:120;
}

/* ---------- nav ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;height:var(--nav-h);z-index:100;
  display:flex;align-items:center;gap:26px;padding:0 var(--pad);
  background:rgba(255,255,255,.72);backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid transparent;
  transition:border-color .3s,background .3s,transform .4s var(--ease);
}
.nav.scrolled{border-bottom-color:var(--line)}
.nav.hidden{transform:translateY(-100%)}
.nav-logo img{height:30px;width:auto}
.nav-links{display:flex;gap:4px;margin-left:auto;align-items:center}
.nav-links a{
  padding:9px 14px;border-radius:999px;font-size:.93rem;font-weight:450;color:#3A3F47;
  transition:background .22s,color .22s;
}
.nav-links a:hover{background:rgba(10,11,13,.05);color:var(--ink)}
.nav-links a.on{color:var(--blue);font-weight:550}
.nav .btn{min-height:38px;padding:0 20px;font-size:.93rem}
.menu-btn{
  display:none;margin-left:auto;width:44px;height:44px;border:0;background:none;
  cursor:pointer;position:relative;
}
.menu-btn i{
  position:absolute;left:11px;width:22px;height:1.6px;background:var(--ink);border-radius:2px;
  transition:transform .34s var(--ease),opacity .2s;
}
.menu-btn i:nth-child(1){top:18px}
.menu-btn i:nth-child(2){top:25px}
.menu-btn.open i:nth-child(1){transform:translateY(3.5px) rotate(45deg)}
.menu-btn.open i:nth-child(2){transform:translateY(-3.5px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{
  position:relative;min-height:100svh;display:flex;align-items:flex-end;
  padding:0 0 clamp(70px,10vh,120px);overflow:hidden;background:#000;
}
.hero-media{position:absolute;inset:0;overflow:hidden}
.hero-media img{
  width:100%;height:100%;object-fit:cover;object-position:center 42%;
  transform:scale(1.08);will-change:transform;
}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(0,0,0,.5) 0%,rgba(0,0,0,.15) 38%,rgba(0,0,0,.82) 100%);
}
.hero-body{position:relative;z-index:2;width:100%;color:#fff}
.hero h1{color:#fff;max-width:14ch}
.hero .lede{color:rgba(255,255,255,.82);max-width:44ch}
.hero-sm{min-height:auto;padding:calc(var(--nav-h) + clamp(90px,13vw,150px)) 0 clamp(70px,10vw,120px);align-items:center}
.hero-sm .hero-media img{object-position:center 45%}

.scroll-cue{
  position:absolute;left:50%;bottom:26px;z-index:3;transform:translateX(-50%);
  width:22px;height:36px;border:1.5px solid rgba(255,255,255,.45);border-radius:12px;
}
.scroll-cue::after{
  content:"";position:absolute;left:50%;top:7px;width:3px;height:7px;border-radius:2px;
  background:#fff;transform:translateX(-50%);animation:cue 1.9s var(--ease) infinite;
}
@keyframes cue{0%{opacity:0;transform:translate(-50%,0)}35%{opacity:1}100%{opacity:0;transform:translate(-50%,12px)}}

/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(20px,4vw,50px)}
.stat b{
  display:block;font-family:"Inter Tight",sans-serif;font-weight:600;
  font-size:clamp(2.6rem,5.6vw,4.2rem);letter-spacing:-.045em;line-height:1;
  font-variant-numeric:tabular-nums;
}
.stat span{display:block;margin-top:12px;font-size:.98rem;color:var(--muted)}
.dark .stat span{color:#9BA3AE}

/* ---------- media ---------- */
figure{margin:0}
.media{border-radius:var(--r-media);overflow:hidden;background:var(--mist)}
.media img{width:100%;height:100%;object-fit:cover;transition:transform .9s var(--ease)}
.media-tall img{aspect-ratio:4/5}
.media-wide img{aspect-ratio:16/10}
.media-video{aspect-ratio:16/9;background:#000}
.media-video iframe{width:100%;height:100%;border:0;display:block}
figcaption{margin-top:16px;font-size:.97rem;color:var(--muted)}

/* ---------- sticky program scroller ---------- */
.scroller{display:grid;grid-template-columns:0.85fr 1.15fr;gap:clamp(40px,7vw,100px);align-items:start}
.scroller-pin{position:sticky;top:calc(var(--nav-h) + 60px)}
.pin-item{display:none}
.pin-item.on{display:block;animation:pinIn .55s var(--ease) both}
@keyframes pinIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.pin-count{font-size:.9rem;color:var(--muted);margin-top:26px}
.pin-count b{color:var(--ink);font-weight:600}
.dark .pin-count b{color:#fff}
.scroller-list{display:flex;flex-direction:column;gap:clamp(22px,4vw,44px)}
.prog{
  border-radius:var(--r-card);overflow:hidden;background:#101216;position:relative;
  transition:transform .6s var(--ease);
}
.prog img{width:100%;aspect-ratio:16/11;object-fit:cover;transition:transform 1s var(--ease),opacity .6s}
.prog:hover img{transform:scale(1.035)}
.prog-label{
  position:absolute;left:0;right:0;bottom:0;padding:64px 30px 26px;color:#fff;
  background:linear-gradient(180deg,transparent,rgba(0,0,0,.85));
}
.prog-label h3{font-size:1.3rem;letter-spacing:-.02em}
.prog-label p{margin:6px 0 0;font-size:.98rem;color:rgba(255,255,255,.72)}

/* ---------- feature split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(36px,6vw,86px);align-items:center}
.split.top{align-items:start}

/* ---------- cards ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cards-2{grid-template-columns:repeat(2,1fr)}
.card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r-card);
  padding:34px 30px;transition:transform .5s var(--ease),box-shadow .5s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:0 18px 44px rgba(10,11,13,.09)}
.dark .card{background:#131519;border-color:rgba(255,255,255,.09)}
.dark .card:hover{box-shadow:0 18px 44px rgba(0,0,0,.5)}
.card h3{font-size:1.22rem;margin-bottom:10px}
.card p{margin:0;color:var(--muted);font-size:1rem}
.dark .card p{color:#9BA3AE}
.card ul{margin:14px 0 0;padding-left:19px;color:var(--muted)}
.card li{margin-bottom:7px}
.dark .card ul{color:#9BA3AE}

/* ---------- numbered steps ---------- */
.steps{list-style:none;padding:0;margin:clamp(40px,6vw,64px) 0 0;counter-reset:st}
.steps li{
  display:grid;grid-template-columns:64px 1fr;gap:24px;padding:30px 0;
  border-top:1px solid var(--line);
}
.dark .steps li{border-top-color:rgba(255,255,255,.11)}
.steps li:last-child{border-bottom:1px solid var(--line)}
.dark .steps li:last-child{border-bottom-color:rgba(255,255,255,.11)}
.steps li::before{
  counter-increment:st;content:counter(st);
  font-family:"Inter Tight",sans-serif;font-size:1.5rem;font-weight:600;
  color:var(--blue);letter-spacing:-.03em;line-height:1.2;
}
.dark .steps li::before{color:#5EA6E0}
.steps h3{font-size:1.2rem;margin-bottom:7px}
.steps p{margin:0;color:var(--muted)}
.dark .steps p{color:#9BA3AE}

/* ---------- ledger rows ---------- */
.rows{list-style:none;padding:0;margin:clamp(34px,5vw,54px) 0 0}
.rows li{
  display:flex;justify-content:space-between;align-items:baseline;gap:24px;flex-wrap:wrap;
  padding:22px 0;border-top:1px solid var(--line);
}
.dark .rows li{border-top-color:rgba(255,255,255,.11)}
.rows li:last-child{border-bottom:1px solid var(--line)}
.dark .rows li:last-child{border-bottom-color:rgba(255,255,255,.11)}
.rows .r-main{font-size:1.15rem;font-weight:500;letter-spacing:-.02em}
.rows .r-meta{color:var(--muted);font-size:1rem}
.dark .rows .r-meta{color:#9BA3AE}
.rows .r-tag{
  font-size:.82rem;font-weight:550;color:var(--blue);background:var(--blue-soft);
  padding:5px 13px;border-radius:999px;
}

/* ---------- pills ---------- */
.pills{display:flex;flex-wrap:wrap;gap:10px;padding:0;margin:28px 0 0;list-style:none}
.pills li{
  border:1px solid var(--line);border-radius:999px;padding:10px 18px;
  font-size:.95rem;color:#3A3F47;
}
.dark .pills li{border-color:rgba(255,255,255,.16);color:#C3C9D1}

/* ---------- logo wall ---------- */
.logos{
  display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-top:clamp(34px,5vw,54px);
}
.logos-3{grid-template-columns:repeat(3,1fr);max-width:660px}
.logos figure{
  background:#fff;border:1px solid var(--line);border-radius:16px;
  height:104px;display:flex;align-items:center;justify-content:center;padding:16px;
  transition:transform .45s var(--ease),box-shadow .45s var(--ease);
}
.logos figure:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(10,11,13,.09)}
.logos img{max-height:100%;width:auto;object-fit:contain}

/* ---------- countdown ---------- */
.clock{display:flex;gap:clamp(10px,2vw,20px);margin-top:36px;flex-wrap:wrap}
.clock div{
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);
  border-radius:18px;padding:20px 24px;min-width:104px;text-align:center;
  backdrop-filter:blur(10px);
}
.clock b{
  display:block;font-family:"Inter Tight",sans-serif;font-size:2.3rem;font-weight:600;
  letter-spacing:-.04em;font-variant-numeric:tabular-nums;line-height:1;color:#fff;
}
.clock span{display:block;margin-top:8px;font-size:.82rem;color:rgba(255,255,255,.6)}

/* ---------- panel ---------- */
.panel{
  border-radius:32px;padding:clamp(38px,6vw,72px);
  background:linear-gradient(150deg,#1C75BC,#124b78);color:#fff;
}
.panel h2,.panel h3{color:#fff}
.panel p{color:rgba(255,255,255,.86)}
.aims{list-style:none;padding:0;margin:36px 0 0;display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.aims b{
  display:block;font-family:"Inter Tight",sans-serif;font-size:clamp(2rem,4vw,3rem);
  font-weight:600;letter-spacing:-.04em;line-height:1;
}
.aims span{display:block;margin-top:10px;color:rgba(255,255,255,.82);font-size:.98rem}

/* ---------- form ---------- */
.form{max-width:600px;margin-top:38px}
.field{margin-bottom:20px}
.field label{display:block;font-size:.95rem;font-weight:500;margin-bottom:9px}
.field input,.field textarea{
  width:100%;background:var(--paper);border:1px solid var(--line);border-radius:14px;
  padding:15px 17px;font:inherit;font-size:1rem;color:var(--ink);
  transition:border-color .25s,box-shadow .25s;
}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--blue);box-shadow:0 0 0 4px var(--blue-soft);
}
.field textarea{min-height:150px;resize:vertical}
.two-up{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.note{font-size:.9rem;color:var(--muted);margin-top:14px}

/* ---------- footer ---------- */
.foot{background:var(--mist);padding:clamp(56px,8vw,84px) 0 40px;border-top:1px solid var(--line)}
.foot-top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px}
.foot-logo img{height:38px}
.foot h4{font-size:.94rem;font-weight:600;margin-bottom:16px}
.foot ul{list-style:none;padding:0;margin:0}
.foot li{margin-bottom:11px}
.foot a{color:var(--muted);font-size:.97rem;transition:color .2s}
.foot a:hover{color:var(--blue)}
.foot-base{
  margin-top:clamp(40px,6vw,64px);padding-top:26px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  font-size:.9rem;color:var(--muted);
}

/* ---------- reveal ---------- */
[data-reveal]{opacity:0;transform:translateY(26px)}
[data-reveal].in{
  opacity:1;transform:none;
  transition:opacity .95s var(--ease),transform .95s var(--ease);
}

/* ---------- responsive ---------- */
@media(max-width:1000px){
  .logos{grid-template-columns:repeat(3,1fr)}
  .cards{grid-template-columns:repeat(2,1fr)}
  .foot-top{grid-template-columns:1fr 1fr}
}
@media(max-width:860px){
  .nav-links{
    position:fixed;top:var(--nav-h);left:0;right:0;flex-direction:column;gap:0;
    background:rgba(255,255,255,.97);backdrop-filter:blur(20px);
    padding:14px var(--pad) 26px;border-bottom:1px solid var(--line);
    transform:translateY(-8px);opacity:0;pointer-events:none;
    transition:opacity .3s var(--ease),transform .3s var(--ease);
  }
  .nav-links.open{opacity:1;transform:none;pointer-events:auto}
  .nav-links a{padding:15px 4px;font-size:1.06rem;border-radius:10px}
  .menu-btn{display:block}
  .nav>.btn{display:none}
  .stats{grid-template-columns:repeat(2,1fr);gap:36px 20px}
  .scroller{grid-template-columns:1fr;gap:30px}
  .scroller-pin{position:static}
  .pin-item{display:block !important;animation:none}
  .pin-item:not(.on){display:none !important}
  .split{grid-template-columns:1fr}
  .cards,.cards-2,.aims,.two-up{grid-template-columns:1fr}
  .logos{grid-template-columns:repeat(2,1fr)}
  .foot-top{grid-template-columns:1fr;gap:34px}
  .steps li{grid-template-columns:40px 1fr;gap:16px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  [data-reveal]{opacity:1;transform:none}
  .hero-media img{transform:none}
}