/* ===========================================================
   Positive Altitudes
   Type: Sora (display) + Manrope (text/UI)
   Palette: cohesive alpine blue — snow, glacier blue, deep navy
   =========================================================== */
:root{
  --bg:#F1F8FC; --surface:#FFFFFF; --surface-2:#E3F1F8; --ink:#0A2130; --muted:#4E6474;
  --line:#D3E5EF; --sky:#1B8CC0; --sky-brand:#78C8E0; --sky-deep:#0E4460; --ember:#F0913C; --ember-deep:#DA761E; --gold:#F6B45A;
  --ring:rgba(27,140,192,.42);
  --shadow-sm:0 1px 2px rgba(11,26,43,.05);
  --shadow:0 2px 6px rgba(11,26,43,.05),0 16px 40px -22px rgba(11,26,43,.28);
  --shadow-lg:0 40px 80px -40px rgba(11,26,43,.45);
  --maxw:1160px; --radius:20px;
  --display:"Sora",-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif;
  --sans:"Manrope",-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,Arial,sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#07161F;--surface:#0D2029;--surface-2:#123039;--ink:#E8F4F9;--muted:#93AEBB;
    --line:#1B3540;--sky:#5FC0E6;--sky-brand:#8FD3EA;--sky-deep:#2E86B0;--ember:#FF9E52;--ember-deep:#F0873A;--gold:#FFC072;
    --ring:rgba(95,192,230,.45);
    --shadow-sm:0 1px 2px rgba(0,0,0,.4);
    --shadow:0 2px 8px rgba(0,0,0,.35),0 20px 46px -24px rgba(0,0,0,.75);
    --shadow-lg:0 40px 80px -36px rgba(0,0,0,.85);}
}
:root[data-theme="light"]{--bg:#F1F8FC;--surface:#FFFFFF;--surface-2:#E3F1F8;--ink:#0A2130;--muted:#4E6474;
  --line:#D3E5EF;--sky:#1B8CC0;--sky-brand:#78C8E0;--sky-deep:#0E4460;--ember:#F0913C;--ember-deep:#DA761E;--gold:#F6B45A;
  --ring:rgba(27,140,192,.42);--shadow-sm:0 1px 2px rgba(11,26,43,.05);
  --shadow:0 2px 6px rgba(11,26,43,.05),0 16px 40px -22px rgba(11,26,43,.28);--shadow-lg:0 40px 80px -40px rgba(11,26,43,.45);}
:root[data-theme="dark"]{--bg:#07161F;--surface:#0D2029;--surface-2:#123039;--ink:#E8F4F9;--muted:#93AEBB;
  --line:#1B3540;--sky:#5FC0E6;--sky-brand:#8FD3EA;--sky-deep:#2E86B0;--ember:#FF9E52;--ember-deep:#F0873A;--gold:#FFC072;
  --ring:rgba(95,192,230,.45);--shadow-sm:0 1px 2px rgba(0,0,0,.4);
  --shadow:0 2px 8px rgba(0,0,0,.35),0 20px 46px -24px rgba(0,0,0,.75);--shadow-lg:0 40px 80px -36px rgba(0,0,0,.85);}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.65;
  -webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3{margin:0;font-family:var(--display);font-weight:700;line-height:1.1;
  letter-spacing:-.02em;text-wrap:balance}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
.eyebrow{font-family:var(--sans);font-size:.76rem;font-weight:700;text-transform:uppercase;letter-spacing:.22em;
  color:var(--sky);margin:0 0 16px;display:inline-block}

/* Section rhythm */
.sec{padding:104px 0}
.sec.tint{background:var(--surface-2)}
.stats-sec{padding:56px 0 64px}
.donate-sec{padding:40px 0 8px}
.sec-head{max-width:34ch}
.sec-head.ctr{margin-left:auto;margin-right:auto;text-align:center;max-width:40ch}
.sec-head h2{font-size:clamp(2rem,4vw,3.1rem);font-weight:700}
.sec-head p{color:var(--muted);font-size:1.14rem;margin:18px 0 0;line-height:1.6}
.sec-head.ctr p{margin-left:auto;margin-right:auto}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:9px;font-family:var(--sans);font-weight:700;font-size:.96rem;
  text-decoration:none;border-radius:999px;padding:13px 24px;letter-spacing:.005em;
  transition:transform .16s ease,box-shadow .22s ease,background .2s,border-color .2s,color .2s}
.btn:focus-visible{outline:3px solid var(--ring);outline-offset:3px}
.btn-donate{background:linear-gradient(180deg,#40B2E3,#1B8CC0);color:#fff;
  box-shadow:0 10px 26px -10px rgba(27,140,192,.8)}
.btn-donate:hover{transform:translateY(-2px);box-shadow:0 16px 34px -8px rgba(27,140,192,.95)}
.btn-primary{background:var(--sky);color:#fff;box-shadow:0 10px 24px -12px rgba(28,116,192,.9)}
.btn-primary:hover{transform:translateY(-2px);background:var(--sky-deep)}
.btn-glass{background:rgba(255,255,255,.12);color:#fff;border:1.5px solid rgba(255,255,255,.5);backdrop-filter:blur(6px)}
.btn-glass:hover{background:rgba(255,255,255,.95);color:var(--ink);border-color:#fff;transform:translateY(-2px)}

/* Header */
header.nav{position:sticky;top:0;z-index:60;transition:background .3s,border-color .3s,box-shadow .3s;
  background:transparent;border-bottom:1px solid transparent}
header.nav.scrolled{background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:saturate(150%) blur(14px);
  border-bottom-color:var(--line);box-shadow:var(--shadow-sm)}
.nav-in{display:flex;align-items:center;gap:30px;height:72px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--display);font-weight:600;font-size:1.15rem;
  letter-spacing:-.01em;text-decoration:none;color:#fff}
header.nav.scrolled .brand{color:var(--ink)}
.brand img{height:34px;width:auto;object-fit:contain}
.nav-links{display:flex;gap:28px;margin-left:auto;align-items:center}
.nav-links a{text-decoration:none;color:rgba(255,255,255,.82);font-weight:600;font-size:.93rem;padding:6px 0;position:relative;transition:color .18s}
header.nav.scrolled .nav-links a{color:var(--muted)}
.nav-links a:hover,header.nav.scrolled .nav-links a:hover{color:var(--sky)}
.nav-links a::after{content:"";position:absolute;left:0;right:100%;bottom:-3px;height:2px;background:var(--sky);transition:right .25s ease}
.nav-links a:hover::after,.nav-links a.active::after{right:0}
.nav-links a.active{color:#fff}
header.nav.scrolled .nav-links a.active{color:var(--ink)}
.nav-toggle{display:none;margin-left:auto}

/* Hero */
.hero{position:relative;overflow:hidden;background:#06141d;color:#EAF2F9;isolation:isolate;
  min-height:min(92vh,780px);display:flex;align-items:center;margin-top:-72px;padding-top:72px}
.hero .bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 42%;z-index:0;
  transform:scale(1.06);animation:heroZoom 20s ease-out forwards}
@keyframes heroZoom{to{transform:scale(1)}}
.hero .veil{position:absolute;inset:0;z-index:1;background:
  linear-gradient(92deg,rgba(5,13,22,.95) 0%,rgba(5,13,22,.78) 42%,rgba(5,13,22,.32) 100%),
  linear-gradient(0deg,rgba(5,13,22,.85),transparent 46%)}
.hero .grain{position:absolute;inset:0;z-index:1;opacity:.06;pointer-events:none;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
.hero-in{position:relative;z-index:2;max-width:var(--maxw);margin:0 auto;padding:96px 28px 132px;width:100%}
.hero .eyebrow{color:var(--sky-brand)}
.hero h1{font-size:clamp(2.5rem,5.6vw,4.6rem);font-weight:700;line-height:1.04;letter-spacing:-.035em;margin:0 0 24px}
.hero p.lead{font-size:clamp(1.08rem,1.65vw,1.34rem);line-height:1.55;max-width:46ch;color:#CFDFEC;margin:0 0 36px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.hero-note{margin-top:28px;font-size:.92rem;color:#A9BDCE;display:flex;align-items:center;gap:11px}
.hero-note .tag{font-family:var(--sans);font-weight:700;font-size:.72rem;letter-spacing:.08em;color:#06141d;
  background:var(--sky-brand);border-radius:999px;padding:4px 10px}
.hero .ridge{position:absolute;left:0;right:0;bottom:-1px;width:100%;height:clamp(36px,4.5vw,72px);z-index:2;display:block}
.hero .ridge path{fill:var(--bg)}

/* Reveal */
.fade{opacity:0;transform:translateY(22px);transition:opacity .7s cubic-bezier(.22,.61,.36,1),transform .7s cubic-bezier(.22,.61,.36,1)}
.fade.in{opacity:1;transform:none}

/* Stats */
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.stat{text-align:center;padding:14px 10px;position:relative}
.stat:not(:last-child)::after{content:"";position:absolute;right:-10px;top:22%;height:56%;width:1px;background:var(--line)}
.stat .n{font-family:var(--display);font-weight:600;font-size:clamp(2.6rem,5vw,3.7rem);line-height:1;color:var(--ink);
  letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.stat .n span{color:var(--sky);font-size:.62em;vertical-align:super;margin-left:.02em}
.stat .l{margin-top:10px;color:var(--muted);font-size:.95rem;font-weight:500;line-height:1.4}

/* Mission split */
.split{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:60px;align-items:center}
.frame{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line);background:#0d2338}
.frame img{width:100%;height:100%;object-fit:cover;display:block}
.frame.tall img{aspect-ratio:3/2}
.split h2{font-size:clamp(1.9rem,3.6vw,2.7rem);font-weight:700;margin-bottom:22px}
.split p{color:var(--muted);font-size:1.1rem;margin:0 0 18px;line-height:1.66}
.split p strong{color:var(--ink);font-weight:700}
.split .btn{margin-top:14px}

/* Benefits */
.benefits{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;margin-top:56px}
.benefit{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:26px 24px;
  transition:transform .22s ease,border-color .22s,box-shadow .22s}
.benefit:hover{transform:translateY(-5px);border-color:var(--sky);box-shadow:var(--shadow)}
.benefit .ic{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:var(--surface-2);margin-bottom:16px}
.benefit .ic svg{width:23px;height:23px;stroke:var(--sky);fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.benefit .ic.ember{background:color-mix(in srgb,var(--sky) 20%,transparent)}
.benefit .ic.ember svg{stroke:var(--sky)}
.benefit.accent{background:linear-gradient(160deg,var(--sky-deep),#082b3d);border:none;color:#fff}
.benefit.accent p{color:#c6dcee}
.benefit h3{font-family:var(--display);font-size:1.24rem;font-weight:600;letter-spacing:-.01em;margin-bottom:8px}
.benefit p{margin:0;color:var(--muted);font-size:.96rem;line-height:1.55}

/* Videos */
.vids{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:52px}
.vid-card{background:var(--surface);border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:var(--shadow);
  transition:transform .22s ease,box-shadow .22s}
.vid-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.vid-card .media{position:relative;aspect-ratio:16/10;background:#07121e}
.vid-card video{width:100%;height:100%;object-fit:cover;display:block;background:#07121e}
.vid-card .cap{padding:16px 20px;display:flex;align-items:baseline;justify-content:space-between;gap:10px}
.vid-card .cap .yr{font-family:var(--display);font-size:1.2rem;font-weight:600}
.vid-card .cap .lb{font-size:.72rem;text-transform:uppercase;letter-spacing:.16em;color:var(--muted);font-weight:700}

/* Gallery */
.gallery{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:22px}
.gallery .frame img{aspect-ratio:1/1.08}

/* Testimonials */
.tgrid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:52px}
.qc{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:32px 30px;margin:0;position:relative}
.qc::before{content:"\201C";position:absolute;top:14px;left:24px;font-family:var(--display);font-size:3.4rem;line-height:1;color:var(--sky);opacity:.5}
.qc blockquote{margin:0;padding-top:26px;font-family:var(--sans);font-style:normal;font-weight:500;
  font-size:1.1rem;line-height:1.55;color:var(--ink)}
.qc.feature{grid-column:span 3;background:linear-gradient(135deg,var(--sky-deep),#07242f 70%);color:#fff;border:none;
  padding:44px 46px;display:flex;flex-direction:column;justify-content:center}
.qc.feature::before{color:var(--sky-brand);opacity:.6;font-size:4.2rem;top:18px;left:34px}
.qc.feature blockquote{color:#EAF4FB;font-size:clamp(1.3rem,2.2vw,1.72rem);line-height:1.42;max-width:46ch}
.qc .who{margin-top:22px;font-family:var(--sans);font-style:normal;font-weight:700;font-size:.96rem}
.qc .who span{display:block;color:var(--muted);font-weight:500;font-size:.85rem;margin-top:3px}
.qc.feature .who{margin-top:26px}.qc.feature .who span{color:#b9d2e8}

/* Press */
.press{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:52px}
.press a{display:flex;flex-direction:column;gap:10px;text-decoration:none;background:var(--surface);border:1px solid var(--line);
  border-radius:16px;padding:26px 26px;box-shadow:var(--shadow-sm);transition:transform .22s,border-color .22s,box-shadow .22s}
.press a:hover{transform:translateY(-5px);border-color:var(--sky);box-shadow:var(--shadow)}
.press .out{font-size:.74rem;text-transform:uppercase;letter-spacing:.14em;color:var(--sky);font-weight:800}
.press .hl{font-family:var(--display);font-weight:600;font-size:1.1rem;letter-spacing:-.01em;line-height:1.32}
.press .go{margin-top:auto;color:var(--muted);font-size:.86rem;font-weight:600}
.press a:hover .go{color:var(--sky)}

/* Sponsors */
.logos{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px;margin-top:50px}
.logo-tile{background:#fff;border:1px solid var(--line);border-radius:16px;aspect-ratio:3/2;display:grid;place-items:center;
  padding:24px;box-shadow:var(--shadow-sm);transition:transform .22s,box-shadow .22s}
.logo-tile:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.logo-tile img{max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain;filter:none;opacity:1;transition:filter .3s,opacity .3s}
.logo-tile.dark{background:#0b1a2b}
/* greyscale-until-hover only on devices that can hover (desktop); touch shows full colour */
@media (hover:hover){
  .logo-tile img{filter:grayscale(1);opacity:.66}
  .logo-tile:hover img{filter:none;opacity:1}
  .logo-tile.dark img{filter:none;opacity:1}
}
.partners-head{text-align:center;margin-top:72px}
.partners-head p{color:var(--muted);margin:2px 0 0;font-size:1.05rem}
.partners{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:28px}
.partner{border:1px solid var(--line);border-radius:16px;background:var(--surface);box-shadow:var(--shadow-sm);
  padding:26px 20px;text-align:center;font-family:var(--display);font-weight:600;font-size:1.14rem;line-height:1.25;
  display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:110px}
.partner span{font-family:var(--sans);font-weight:500;font-size:.9rem;color:var(--muted);margin-top:4px}

/* Founders */
.founders{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin-top:52px;max-width:760px}
.founder{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);
  transition:transform .22s,box-shadow .22s}
.founder:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.founder .pic{aspect-ratio:1/1;overflow:hidden;background:#0d2338}
.founder .pic img{width:100%;height:100%;object-fit:cover;object-position:center 20%;transition:transform .5s ease}
.founder:hover .pic img{transform:scale(1.04)}
.founder .body{padding:22px 24px 26px}
.founder h3{font-family:var(--display);font-size:1.34rem;font-weight:600}
.founder .role{color:var(--sky);font-weight:700;font-size:.78rem;text-transform:uppercase;letter-spacing:.12em;margin-top:6px}

/* Donate band */
.band{position:relative;overflow:hidden;border-radius:28px;background:linear-gradient(125deg,var(--sky-deep),#0a2d3f 58%,#06202c);
  color:#fff;padding:76px 44px;text-align:center;box-shadow:var(--shadow-lg)}
.band h2{font-size:clamp(2rem,4vw,3rem);font-weight:700;margin-bottom:16px;color:#fff}
.band .eyebrow{color:var(--sky-brand)}
.band p{color:#c3d8ea;max-width:56ch;margin:0 auto 32px;font-size:1.14rem}
.band .glow{position:absolute;width:600px;height:600px;border-radius:50%;
  background:radial-gradient(circle,rgba(246,180,90,.4),transparent 62%);top:-220px;right:-150px;z-index:0}
.band>*{position:relative;z-index:1}
.band .btnrow{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* Footer */
footer.ft{background:var(--surface);border-top:1px solid var(--line);margin-top:96px;padding:64px 0 42px}
.ft-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:44px}
.ft-brand .brand{color:var(--ink);font-size:1.2rem}
.ft-grid h4{font-size:.78rem;text-transform:uppercase;letter-spacing:.16em;color:var(--muted);margin:0 0 18px;font-weight:800}
.ft-grid>div>a{display:block;text-decoration:none;color:var(--ink);margin-bottom:11px;font-size:.97rem;font-weight:500}
.ft-grid>div>a:hover{color:var(--sky)}
.ft-brand p{color:var(--muted);max-width:36ch;margin:16px 0 0;font-size:.98rem}
.socials{display:flex;gap:12px;margin-top:22px}
.socials a{width:40px;height:40px;border:1px solid var(--line);border-radius:11px;display:grid;place-items:center;margin:0}
.socials a:hover{border-color:var(--sky);background:var(--surface-2);transform:translateY(-2px);transition:.2s}
.socials svg{width:18px;height:18px;fill:var(--muted)}
.socials a:hover svg{fill:var(--sky)}
.ft-base{max-width:var(--maxw);margin:44px auto 0;padding:24px 28px 0;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:var(--muted);font-size:.86rem}

/* Responsive */
@media (max-width:920px){
  .nav-links{display:none}
  .nav-toggle{display:inline-flex}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 20px}
  .stat:nth-child(2)::after{display:none}
  .split{grid-template-columns:1fr;gap:36px}
  .benefits{grid-template-columns:repeat(2,minmax(0,1fr))}
  .vids{grid-template-columns:repeat(2,minmax(0,1fr))}
  .gallery{grid-template-columns:1fr}
  .tgrid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .qc.feature{grid-column:span 2}
  .press{grid-template-columns:repeat(2,minmax(0,1fr))}
  .logos{grid-template-columns:repeat(3,minmax(0,1fr))}
  .partners{grid-template-columns:repeat(2,minmax(0,1fr))}
  .founders{grid-template-columns:repeat(2,minmax(0,1fr));max-width:none}
  .ft-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .sec{padding:80px 0}
  .band{padding:56px 28px}
}
@media (max-width:600px){
  body{font-size:16px}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .stat::after{display:none!important}
  .benefits{grid-template-columns:1fr}
  .vids{grid-template-columns:1fr}
  .tgrid{grid-template-columns:1fr}
  .qc.feature{grid-column:span 1}
  .press{grid-template-columns:1fr}
  .logos{grid-template-columns:repeat(2,minmax(0,1fr))}
  .partners{grid-template-columns:repeat(2,minmax(0,1fr))}
  .founders{grid-template-columns:1fr}
  .ft-grid{grid-template-columns:1fr}
  .ft-base{flex-direction:column;gap:6px}
}
@media (prefers-reduced-motion:reduce){
  .fade{transition:none;opacity:1;transform:none}
  .hero .bg{animation:none;transform:none}
  html{scroll-behavior:auto}
  .founder:hover .pic img{transform:none}
}