/* Frosties HQ — snow at night. Single committed theme (dark, icy). */
:root{
  --night:#0A1328; --night-2:#101C3A; --night-3:#16254A;
  --ice:#7FD3FF; --ice-2:#BFE9FF; --ice-dim:#3C7FB5;
  --frost:#EAF6FF; --mist:#9FB3CF; --line:#22365E; --line-2:#2E4775;
  --gold:#E2B45A; --gold-dim:#8C6B25; --teal:#7FE3D4; --aurora:#C9A6FF;
  --danger:#FF8A80;
  --font-body:"Manrope","Hiragino Sans","Noto Sans",system-ui,sans-serif;
  --font-display:"Playfair Display","Cormorant Garamond",Georgia,serif;
  --font-hand:"Caveat","Segoe Script",cursive;
  --font-mono:"IBM Plex Mono",ui-monospace,Menlo,monospace;
  --r:14px; --shadow:0 10px 30px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--night);color:var(--frost);font-family:var(--font-body);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:var(--ice);text-decoration:none}
a:hover{color:var(--ice-2)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--ice);outline-offset:3px}
img{max-width:100%;display:block}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;line-height:1.15;margin:0;text-wrap:balance;letter-spacing:.005em}
h1{font-size:clamp(40px,8vw,76px)}
h2{font-size:clamp(26px,4.2vw,38px)}
h3{font-size:clamp(19px,2.6vw,24px)}
p{margin:10px 0;color:var(--mist);max-width:62ch}
p strong,li strong{color:var(--frost)}
.flake{color:var(--ice)}
.eyebrow{font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--ice-dim);margin-bottom:10px}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
.narrow{max-width:760px;margin:0 auto}
/* snow canvas */
#snow{position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.55}
.page{position:relative;z-index:1}
/* nav */
.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(10px);background:rgba(10,19,40,.72);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:56px;gap:16px}
.brand{font-family:var(--font-display);font-size:18px;letter-spacing:.08em;color:var(--frost)}
.brand .flake{margin-right:6px}
.navlinks{display:flex;gap:18px;font-size:13px;letter-spacing:.04em}
.navlinks a{color:var(--mist)}
.navlinks a:hover{color:var(--ice-2)}
@media (max-width:640px){.navlinks{display:none}}
/* hero */
.hero{position:relative;min-height:78vh;display:grid;align-items:end;overflow:hidden;border-bottom:1px solid var(--line)}
.hero .bg{position:absolute;inset:0;background:url('../images/fuyu_main.jpg') center 30%/cover no-repeat;opacity:.5}
.hero .veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,19,40,.2) 0%,rgba(10,19,40,.55) 45%,var(--night) 100%)}
.hero .wrap{position:relative;padding:120px 20px 56px}
.hero h1{margin-top:8px}
.hero .sub{font-size:clamp(16px,2.2vw,20px);color:var(--ice-2);max-width:40ch;margin-top:14px}
.hero .made{font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;color:var(--mist);margin-top:26px;text-transform:uppercase}
/* buttons */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 20px;border-radius:999px;border:1px solid var(--ice);color:var(--ice-2);font-weight:600;font-size:15px;background:rgba(127,211,255,.06);transition:background .15s,transform .15s;white-space:nowrap;cursor:pointer;font-family:var(--font-body)}
.btn:hover{background:rgba(127,211,255,.16);color:#fff}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--ice);color:#071022;border-color:var(--ice)}
.btn.primary:hover{background:var(--ice-2);color:#071022}
.btn.ghost{border-color:var(--line-2);color:var(--mist)}
.btn.ghost:hover{border-color:var(--ice);color:var(--ice-2)}
.btn.sm{padding:8px 14px;font-size:13px}
.btnrow{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
/* sections */
section.block{padding:72px 0;border-bottom:1px solid var(--line)}
section.block:last-of-type{border-bottom:0}
.sechead{display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:22px}
.sechead p{margin:6px 0 0}
/* cards */
.card{background:var(--night-2);border:1px solid var(--line);border-radius:var(--r);padding:22px 22px;box-shadow:var(--shadow)}
.card h3{margin-bottom:6px}
.grid{display:grid;gap:14px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media (max-width:820px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.g2,.g3,.g4{grid-template-columns:1fr}}
/* start tiles */
.start .card{display:flex;flex-direction:column;gap:10px;min-height:190px}
.start .k{font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--ice-dim)}
.start .card p{margin:0;font-size:14.5px;flex:1}
/* mission board */
.mission{background:linear-gradient(135deg,#122349,#0F1B3B);border:1px solid var(--line-2);border-radius:var(--r);padding:28px 26px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.mission::after{content:"❄";position:absolute;right:-10px;top:-26px;font-size:160px;color:rgba(127,211,255,.07);line-height:1}
.mission .code{font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;color:var(--ice)}
.mission .text{font-family:var(--font-display);font-size:clamp(22px,3.4vw,30px);color:var(--frost);margin:10px 0 6px;max-width:26ch;line-height:1.3}
.mission .meta{display:flex;flex-wrap:wrap;gap:18px;font-size:13px;color:var(--mist);margin-top:10px;font-family:var(--font-mono)}
.mission .how{margin-top:18px;padding-top:16px;border-top:1px solid var(--line-2);font-size:14.5px;color:var(--mist)}
.mission .how b{color:var(--frost)}
.kbd{display:inline-block;font-family:var(--font-mono);font-size:12.5px;padding:2px 8px;border:1px solid var(--line-2);border-radius:6px;color:var(--ice-2);background:rgba(0,0,0,.2)}
/* progress */
.prog{display:grid;gap:14px}
.prog .row{display:grid;grid-template-columns:1fr;gap:6px}
.prog .lbl{display:flex;justify-content:space-between;font-size:14px;color:var(--mist)}
.prog .lbl b{color:var(--frost);font-family:var(--font-mono);font-weight:500}
.prog .bar{height:10px;background:var(--night-3);border-radius:6px;overflow:hidden}
.prog .bar i{display:block;height:100%;background:linear-gradient(90deg,var(--ice-dim),var(--ice));border-radius:6px}
.prog .north{font-family:var(--font-display);color:var(--ice-2);font-size:20px;margin-top:6px}
/* ranks */
.ranks{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;align-items:end}
@media (max-width:820px){.ranks{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.ranks{grid-template-columns:1fr}}
.rank{background:var(--night-2);border:1px solid var(--line);border-radius:12px;padding:16px 16px 14px;position:relative}
.rank .lv{font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;color:var(--ice-dim)}
.rank h4{font-family:var(--font-display);font-size:20px;margin:4px 0 8px}
.rank p{font-size:13px;margin:4px 0}
.rank .how{color:var(--mist)}
.rank .get{color:var(--frost)}
.rank.r1{border-color:var(--line-2)}
.rank.r2{border-color:var(--ice-dim)}
.rank.r3{border-color:var(--teal)}
.rank.r4{border-color:var(--aurora)}
.rank.r5{border-color:var(--gold)}
.rank.r5 h4{color:var(--gold)}
.rank.r4 h4{color:var(--aurora)}
.rank.r3 h4{color:var(--teal)}
/* hall */
.people{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}
@media (max-width:820px){.people{grid-template-columns:repeat(3,1fr)}}
.person{text-align:center}
.person img{width:100%;aspect-ratio:1;object-fit:cover;border-radius:50%;border:2px solid var(--line-2)}
.person .n{margin-top:8px;font-weight:600;color:var(--frost)}
.person .c{font-size:12px;color:var(--mist);font-family:var(--font-mono)}
.person .t{font-size:11px;color:var(--gold);letter-spacing:.12em;text-transform:uppercase;font-family:var(--font-mono);margin-top:2px}
/* party */
.party{display:grid;grid-template-columns:1.2fr 1fr;gap:18px;align-items:stretch}
@media (max-width:820px){.party{grid-template-columns:1fr}}
.party .when{font-family:var(--font-display);font-size:clamp(22px,3vw,30px);color:var(--frost);margin:6px 0}
/* guide steps */
.steps{counter-reset:s;display:grid;gap:12px}
.steps .st{display:grid;grid-template-columns:34px 1fr;gap:12px;align-items:start;background:var(--night-2);border:1px solid var(--line);border-radius:12px;padding:14px 16px}
.steps .st::before{counter-increment:s;content:counter(s);width:28px;height:28px;border-radius:50%;background:rgba(127,211,255,.12);color:var(--ice);display:flex;align-items:center;justify-content:center;font-family:var(--font-mono);font-size:13px}
.steps .st p{margin:0;font-size:14.5px}
.steps .st b{color:var(--frost)}
/* code list */
.code-list{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
@media (max-width:820px){.code-list{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.code-list{grid-template-columns:1fr}}
.code-list .c{background:var(--night-2);border:1px solid var(--line);border-radius:12px;padding:16px}
.code-list .c b{display:block;font-family:var(--font-display);font-size:19px;color:var(--frost);margin-bottom:4px}
.code-list .c span{font-size:14px;color:var(--mist)}
/* letter */
.letter{background:var(--night-2);border:1px solid var(--line);border-radius:var(--r);padding:30px 28px;font-family:var(--font-hand);font-size:22px;line-height:1.5;color:var(--frost)}
.letter p{font-family:inherit;font-size:inherit;color:var(--frost);max-width:none}
.letter .sig{text-align:right;color:var(--ice-2);margin-top:18px}
/* footer */
footer{padding:48px 0 80px;color:var(--mist);font-size:13px}
footer .row{display:flex;flex-wrap:wrap;gap:14px 24px;margin-top:10px}
footer a{color:var(--mist)}
footer a:hover{color:var(--ice-2)}
/* welcome book (stepper) */
.book{max-width:720px;margin:0 auto;padding:40px 20px 120px}
.card-page{display:none;animation:fade .35s ease}
.card-page.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.book .hd{font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--ice-dim);margin-bottom:10px}
.book h2{margin-bottom:14px}
.book .pic{border-radius:var(--r);overflow:hidden;margin:18px 0;border:1px solid var(--line)}
.book .pic img{width:100%;height:auto}
.bookbar{position:fixed;left:0;right:0;bottom:0;z-index:40;background:rgba(10,19,40,.85);backdrop-filter:blur(10px);border-top:1px solid var(--line)}
.bookbar .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.bookbar .pg{font-family:var(--font-mono);font-size:12px;color:var(--mist)}
.bookbar .prog{height:3px;background:var(--night-3);position:absolute;left:0;right:0;top:0}
.bookbar .prog i{display:block;height:100%;background:var(--ice);width:0;transition:width .3s}
.choice{display:grid;gap:10px;margin-top:18px}
.choice .btn{justify-content:center;text-align:center;white-space:normal}
.members{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:560px){.members{grid-template-columns:1fr}}
.members .m{background:var(--night-2);border:1px solid var(--line);border-radius:12px;padding:16px}
.members .m b{font-family:var(--font-display);font-size:20px;color:var(--frost)}
.members .m span{display:block;font-size:13px;color:var(--mist)}
input.name{width:100%;padding:14px 16px;border-radius:12px;border:1px solid var(--line-2);background:var(--night-2);color:var(--frost);font-size:18px;font-family:var(--font-body)}
input.name::placeholder{color:var(--ice-dim)}
/* pass */
.pass{position:relative;width:min(520px,100%);aspect-ratio:1.586;border-radius:18px;overflow:hidden;border:1px solid var(--line-2);box-shadow:0 20px 50px rgba(0,0,0,.5);margin:18px auto;background:#0c1a3a}
.pass .bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.55}
.pass .veil{position:absolute;inset:0;background:linear-gradient(160deg,rgba(10,19,40,.15),rgba(10,19,40,.85))}
.pass .in{position:absolute;inset:0;padding:22px 24px;display:flex;flex-direction:column;justify-content:space-between}
.pass .top{display:flex;justify-content:space-between;align-items:flex-start;font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;color:var(--ice-2)}
.pass .rar{padding:3px 10px;border:1px solid var(--ice);border-radius:999px;color:var(--ice-2)}
.pass .rar.rare{border-color:var(--teal);color:var(--teal)}
.pass .rar.epic{border-color:var(--aurora);color:var(--aurora)}
.pass .rar.legendary{border-color:var(--gold);color:var(--gold)}
.pass .name{font-family:var(--font-display);font-size:clamp(26px,5vw,38px);color:#fff;line-height:1.1}
.pass .name small{display:block;font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;color:var(--ice-2);margin-bottom:8px;text-transform:uppercase}
.pass .bot{display:flex;justify-content:space-between;align-items:flex-end;font-family:var(--font-mono);font-size:12px;color:var(--ice-2);letter-spacing:.08em}
.pass .rank{background:transparent;border:0;padding:0}
.pass .rank b{display:inline-block;padding:4px 10px;border-radius:6px;border:1px solid var(--ice);color:var(--ice-2);font-size:11px;letter-spacing:.16em;text-transform:uppercase;font-family:var(--font-mono);font-weight:500}
.pass .rank b.frost{border-color:var(--ice-2);color:#fff}
.pass .rank b.glacier{border-color:var(--teal);color:var(--teal)}
.pass .rank b.aurora{border-color:var(--aurora);color:var(--aurora)}
.pass .rank b.council{border-color:var(--gold);color:var(--gold)}
.pass.is-council{box-shadow:0 0 0 1px var(--gold),0 20px 50px rgba(0,0,0,.5)}
.note{font-size:13.5px;color:var(--mist)}
.small{font-size:13px;color:var(--mist)}
.center{text-align:center}
.mt1{margin-top:10px}.mt2{margin-top:20px}.mt3{margin-top:32px}
@media (prefers-reduced-motion: reduce){*{animation:none!important;transition:none!important}#snow{display:none}}