/* NIXUMA v4 — design system
   Obsidian #08090B / Ivory #F0F0EA / NIXUMA Lime #C9F169
   Figure-grade restraint: one idea per section, huge quiet type, hairlines. */
:root{
  color-scheme:dark;
  --bg:#08090B;
  --bg-2:#0C0E10;
  --panel:#0D0F11;
  --ink:#F0F0EA;
  --muted:rgba(240,240,234,.64);
  --faint:rgba(240,240,234,.42);
  --line:rgba(240,240,234,.14);
  --lime:#C9F169;
  --lime-ink:#08090B;
  --max:1120px;
  --radius:18px;
  --font:"Hiragino Kaku Gothic ProN","Hiragino Sans","Noto Sans JP",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='1200' height='1200' viewBox='0 0 1200 1200'%3E%3Cg fill='none' stroke='%23C9F169'%3E%3Ccircle cx='600' cy='600' r='170' stroke-opacity='0.05'/%3E%3Ccircle cx='600' cy='600' r='295' stroke-opacity='0.045'/%3E%3Ccircle cx='600' cy='600' r='425' stroke-opacity='0.04'/%3E%3Ccircle cx='600' cy='600' r='555' stroke-opacity='0.035'/%3E%3Cpath d='M600 45 A555 555 0 0 1 1155 600' stroke-opacity='0.08'/%3E%3C/g%3E%3Ccircle cx='600' cy='600' r='7' fill='%23C9F169' fill-opacity='0.09'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-size:1150px auto;
  background-position:right -300px top -320px;background-attachment:fixed;
  font-family:var(--font);
  font-size:16.5px;line-height:1.85;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img,video{max-width:100%;display:block}
a{color:var(--lime);text-decoration:none}
a:hover{text-decoration:underline}
::selection{background:var(--lime);color:var(--lime-ink)}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---------- header (v4.1: text wordmark + globe + curtain menu) ---------- */
.site-head{
  position:sticky;top:0;z-index:100;
  background:transparent;border-bottom:1px solid transparent;
  transition:background .35s ease,border-color .35s ease;
}
.site-head.scrolled{
  background:rgba(8,9,11,.85);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
}
.home .site-head{position:fixed;left:0;right:0}
.site-head .wrap{display:flex;align-items:center;gap:16px;min-height:64px}
.brand{color:var(--ink);font-size:19px;font-weight:600;letter-spacing:.34em;padding:8px 0;white-space:nowrap}
.brand:hover{text-decoration:none}
.head-tools{margin-left:auto;display:flex;gap:10px;align-items:center}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;padding:0;cursor:pointer;color:var(--ink);
  background:rgba(8,9,11,.28);border:1px solid var(--line);border-radius:12px;
}
.icon-btn:hover{border-color:rgba(240,240,234,.45)}
.burger{flex-direction:column;gap:5px}
.burger span{display:block;width:18px;height:1.5px;background:currentColor}

/* curtain menu */
.curtain{
  position:fixed;inset:0;z-index:200;background:rgba(8,9,11,.985);
  overflow-y:auto;opacity:0;transition:opacity .3s ease;
}
.curtain[hidden]{display:none}
.curtain.open{opacity:1}
.curtain-top{display:flex;align-items:center;min-height:64px}
.curtain-brand{color:var(--ink);font-size:19px;font-weight:600;letter-spacing:.34em}
.curtain-brand:hover{text-decoration:none}
.curtain-close{margin-left:auto}
.curtain-nav{display:flex;flex-direction:column;padding-top:5vh}
.curtain-nav a{
  color:var(--ink);font-size:clamp(1.65rem,5.2vw,2.5rem);font-weight:600;line-height:1.35;
  padding:12px 0;border-bottom:1px solid var(--line);
}
.curtain-nav a:hover{color:var(--lime);text-decoration:none}
.curtain.open .curtain-nav a{animation:curtainIn .55s cubic-bezier(.2,.7,.2,1) both}
.curtain.open .curtain-nav a:nth-child(2){animation-delay:.05s}
.curtain.open .curtain-nav a:nth-child(3){animation-delay:.1s}
.curtain.open .curtain-nav a:nth-child(4){animation-delay:.15s}
.curtain.open .curtain-nav a:nth-child(5){animation-delay:.2s}
.curtain.open .curtain-nav a:nth-child(6){animation-delay:.25s}
.curtain.open .curtain-nav a:nth-child(7){animation-delay:.3s}
@keyframes curtainIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.curtain-foot{display:flex;flex-direction:column;gap:22px;padding-top:36px;padding-bottom:56px}
.curtain-course{color:var(--lime);font-size:16px}
.curtain-legal{display:flex;gap:14px 24px;flex-wrap:wrap;list-style:none;padding:0;margin:0}
.curtain-legal a{color:var(--muted);font-size:14px}
.curtain-legal a:hover{color:var(--ink)}
html.locked{overflow:hidden}

/* ---------- type ---------- */
h1,h2,h3{font-weight:600;line-height:1.3;letter-spacing:.01em;margin:0}
h1{font-size:clamp(2.35rem,6.2vw,4.3rem);line-height:1.22}
h2{font-size:clamp(1.65rem,3.6vw,2.5rem)}
h3{font-size:1.18rem;line-height:1.5}
p{margin:0 0 1.1em}
.kicker{
  font-family:var(--mono);font-size:12px;letter-spacing:.32em;text-transform:uppercase;
  color:var(--lime);margin:0 0 22px;
}
.lede{font-size:clamp(1.05rem,2vw,1.28rem);color:var(--muted);max-width:44em;line-height:1.9}
.sub{color:var(--muted)}
.lime{color:var(--lime)}
.updated,.note-line{font-size:13px;color:var(--faint);letter-spacing:.04em}
strong{font-weight:600}

/* answer-first lead block (carried from v3 drafts) */
.answer-first{
  font-size:clamp(1.08rem,2.1vw,1.3rem);line-height:1.95;color:var(--ink);
  border-left:2px solid var(--lime);padding-left:22px;max-width:46em;margin:0 0 8px;
}
.answer-first strong{color:var(--ink)}

/* ---------- layout sections ---------- */
.hero{padding:92px 0 70px}
.hero h1{margin-bottom:26px;max-width:16em}
.sec{padding:76px 0;border-top:1px solid var(--line)}
.sec-block{padding:34px 0;border-top:1px solid var(--line)}
.sec-block:first-of-type{border-top:none}
.section-head{margin-bottom:40px;max-width:46em}
.section-head .kicker{margin-bottom:14px}
.section-head p{color:var(--muted);margin-top:14px}

/* numbered rows (carried markup: .what / .log / .log-row / .n) */
.what,.log{display:flex;flex-direction:column}
.log-row{
  display:flex;gap:22px;align-items:baseline;
  padding:24px 0;border-top:1px solid var(--line);
}
.log-row:first-child{border-top:none}
.log-row .n{
  font-family:var(--mono);color:var(--lime);font-size:14px;letter-spacing:.12em;
  flex:0 0 44px;padding-top:2px;
}
.log-row h3{margin-bottom:6px}
.log-row p{color:var(--muted);margin:0;max-width:52em}
.log-row .price{margin-left:auto;text-align:right;flex:0 0 auto}

/* cards */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.card{
  border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);
  padding:30px 28px;display:flex;flex-direction:column;gap:10px;
}
.card h3{font-size:1.25rem}
.card p{color:var(--muted);margin:0;font-size:15.5px}
.c-kicker{font-family:var(--mono);font-size:11.5px;letter-spacing:.26em;text-transform:uppercase;color:var(--faint)}
.card .price{margin-top:auto;padding-top:12px}
.go{color:var(--lime);font-size:14.5px;margin-top:auto}
.price{font-size:1.55rem;font-weight:600;letter-spacing:.01em;white-space:nowrap}
.price small{font-size:.55em;color:var(--muted);font-weight:400}
.tag{
  display:inline-block;font-size:12px;letter-spacing:.08em;color:var(--lime);
  border:1px solid rgba(201,241,105,.45);border-radius:999px;padding:2px 12px;white-space:nowrap;
}
.tag.dim{color:var(--muted);border-color:var(--line)}

/* buttons */
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:36px}
.btn-link{
  display:inline-block;padding:14px 30px;border-radius:999px;font-size:15px;font-weight:600;
  border:1px solid var(--line);color:var(--ink);letter-spacing:.03em;
}
.btn-link:hover{text-decoration:none;border-color:var(--ink)}
.btn-link.primary{background:var(--lime);border-color:var(--lime);color:var(--lime-ink)}
.btn-link.primary:hover{background:#d7f78d}

/* FAQ */
.faq-item{border-top:1px solid var(--line);padding:26px 0}
.faq-item:first-of-type{border-top:none}
.faq-item .q, .faq-item h3{font-size:1.12rem;margin-bottom:8px}
.faq-item p{color:var(--muted);margin:0;max-width:52em}

/* panels, art, misc components */
.panel{
  border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);
  padding:34px 32px;
}
.panel p:last-child{margin-bottom:0}
.art{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#000}
.art img{width:100%;height:auto}
/* ---------- v4.1 homepage: film hero, motto, artefacts, ivory band ---------- */
.hero-motto{
  position:relative;min-height:96svh;
  display:flex;align-items:center;
}
.hero-motto .motto-text{margin:0}
.m-line{display:block;overflow:hidden;padding-bottom:.06em;margin-bottom:-.06em}
.m-line>span{display:inline-block;animation:mottoUp 1.15s cubic-bezier(.16,.8,.24,1) both}
.m-line:nth-child(2)>span{animation-delay:.18s}
@keyframes mottoUp{from{opacity:0;transform:translateY(105%)}to{opacity:1;transform:none}}
.hero-motto .motto-sub{animation:mottoFade 1s ease .6s both}
@keyframes mottoFade{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
.scroll-hint{
  position:absolute;left:50%;bottom:26px;transform:translateX(-50%);margin:0;
  color:var(--faint);font-family:var(--mono);font-size:11px;letter-spacing:.34em;text-transform:uppercase;
  display:flex;flex-direction:column;align-items:center;gap:10px;
}
.scroll-hint::after{
  content:"";width:1px;height:44px;transform-origin:top;
  background:linear-gradient(var(--lime),transparent);
  animation:hint 2.2s ease-in-out infinite;
}
@keyframes hint{0%,100%{transform:scaleY(.35);opacity:.35}50%{transform:scaleY(1);opacity:1}}
.motto-text{font-size:clamp(2.5rem,7.4vw,5.1rem);font-weight:600;line-height:1.32;letter-spacing:.02em;margin:0}
.motto-sub{
  margin:26px 0 0;color:var(--muted);font-family:var(--mono);
  font-size:13px;letter-spacing:.28em;text-transform:uppercase;
}
.lab{font-family:var(--mono);font-size:12.5px;letter-spacing:.13em;color:var(--faint);margin:0 0 30px}
.proof{
  display:grid;grid-template-columns:repeat(4,1fr);margin-top:58px;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.proof>div{padding:24px 20px 20px;border-left:1px solid var(--line)}
.proof>div:first-child{border-left:none;padding-left:0}
.proof .num{display:block;font-family:var(--mono);font-size:clamp(1.65rem,3.8vw,2.45rem);line-height:1.1;color:var(--lime)}
.proof .cap{display:block;margin-top:9px;color:var(--muted);font-size:13.5px;line-height:1.65}
.qa-card{
  border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);
  padding:30px 30px 26px;max-width:46em;
}
.qa-card+.qa-card{margin-top:22px}
.qa-card.offset{margin-left:auto}
.qa-tag{font-family:var(--mono);font-size:11.5px;letter-spacing:.26em;text-transform:uppercase;color:var(--faint);margin:0 0 12px}
.qa-q{font-size:1.22rem;font-weight:600;line-height:1.6;margin:0}
.qa-a{margin:18px 0 0;padding-top:18px;border-top:1px dashed var(--line);color:var(--muted)}
.qa-a strong{color:var(--ink)}
.band-ivory{background:var(--ink);color:#08090B;border-top:none}
.band-ivory .kicker{color:rgba(8,9,11,.55)}
.band-ivory .section-head p{color:rgba(8,9,11,.68)}
.band-ivory .log-row{border-top-color:rgba(8,9,11,.16)}
.band-ivory .log-row p{color:rgba(8,9,11,.7)}
.band-ivory .log-row .n{color:rgba(8,9,11,.5)}
.band-ivory a{color:#08090B;text-decoration:underline;text-underline-offset:3px}
.band-note{margin:24px 0 0;color:rgba(8,9,11,.64);font-size:14px}
.price-list{margin-top:46px;border-top:1px solid rgba(8,9,11,.16)}
.price-row{
  display:flex;align-items:baseline;gap:8px 18px;flex-wrap:wrap;
  padding:17px 0;border-bottom:1px solid rgba(8,9,11,.16);
}
.price-row .p-name{font-weight:600}
.price-row .p-desc{color:rgba(8,9,11,.62);font-size:14.5px}
.price-row .p-amt{margin-left:auto;font-size:1.3rem;font-weight:600;white-space:nowrap}
.interlude{padding:64px 0}
.interlude-line{
  font-size:clamp(1.3rem,3vw,1.8rem);font-weight:600;line-height:1.7;letter-spacing:.02em;
  max-width:24em;margin:0;
}
.guide-list{border-top:1px solid var(--line)}
.guide-row{
  display:flex;gap:22px;align-items:baseline;color:var(--ink);
  padding:24px 0;border-bottom:1px solid var(--line);
}
.guide-row:hover{text-decoration:none}
.guide-row:hover h3{color:var(--lime)}
.guide-row .n{font-family:var(--mono);color:var(--lime);font-size:14px;flex:0 0 44px}
.guide-row h3{margin-bottom:4px}
.guide-row p{color:var(--muted);margin:0;font-size:15px;max-width:46em}
.guide-row .go{margin-left:auto;flex:0 0 auto}
.score-wrap{display:flex;align-items:baseline;gap:20px;flex-wrap:wrap}
.score-big{font-size:clamp(4.2rem,12vw,7.5rem);font-weight:600;line-height:1;color:var(--lime)}
.score-band{font-family:var(--mono);letter-spacing:.24em;font-size:13px;color:var(--muted);text-transform:uppercase}
table{width:100%;border-collapse:collapse;margin:10px 0 26px;font-size:15px}
th,td{padding:13px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{color:var(--faint);font-weight:500;font-size:12.5px;letter-spacing:.14em;text-transform:uppercase}
td p{margin:0}
ul,ol{margin:0 0 1.2em;padding-left:1.35em;color:var(--muted)}
li{margin-bottom:.45em}
li strong,td strong{color:var(--ink)}
blockquote{
  margin:0 0 26px;padding:22px 26px;border:1px solid var(--line);border-left:2px solid var(--lime);
  border-radius:0 var(--radius) var(--radius) 0;background:var(--bg-2);color:var(--muted);
}
hr{border:none;border-top:1px solid var(--line);margin:38px 0}

/* forms */
form.check{display:grid;gap:18px;max-width:620px}
form.check label{display:block;font-size:14px;letter-spacing:.05em;color:var(--muted)}
form.check input,form.check textarea,form.check select{
  width:100%;margin-top:7px;background:var(--bg-2);border:1px solid var(--line);border-radius:12px;
  color:var(--ink);font:inherit;font-size:16px;padding:13px 15px;
}
form.check input:focus,form.check textarea:focus,form.check select:focus{outline:2px solid var(--lime);outline-offset:1px;border-color:transparent}
form.check button{
  justify-self:start;background:var(--lime);color:var(--lime-ink);border:none;cursor:pointer;
  font:inherit;font-weight:600;padding:14px 34px;border-radius:999px;letter-spacing:.03em;
}
form.check button:hover{background:#d7f78d}

/* ---------- footer ---------- */
.site-foot{border-top:1px solid var(--line);padding:60px 0 46px;margin-top:20px}
.site-foot .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px}
.site-foot h4{font-size:12px;letter-spacing:.26em;text-transform:uppercase;color:var(--faint);margin:0 0 16px;font-weight:500}
.site-foot ul{list-style:none;padding:0;margin:0}
.site-foot li{margin-bottom:9px}
.site-foot a{color:var(--muted);font-size:14.5px}
.site-foot a:hover{color:var(--ink)}
.foot-brand img{width:120px;height:auto;margin-bottom:16px}
.foot-brand p{color:var(--faint);font-size:14px;max-width:30em}
.foot-base{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;gap:18px;flex-wrap:wrap;align-items:center;
  color:var(--faint);font-size:13px;
}
.foot-base 
/* scroll reveal (JS-enhanced only; content is fully visible without JS) */
html.js .rv{opacity:0;transform:translateY(46px);transition:opacity .95s cubic-bezier(.16,.8,.24,1),transform .95s cubic-bezier(.16,.8,.24,1)}
html.js .rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  html.js .rv{opacity:1;transform:none;transition:none}
  .curtain{transition:none}
  .curtain.open .curtain-nav a{animation:none}
  .scroll-hint::after{animation:none}
  .m-line>span,.hero-motto .motto-sub{animation:none}
}

@media (max-width:760px){
  body{font-size:16px}
  .hero{padding:60px 0 48px}
  .sec{padding:54px 0}
  .site-foot .cols{grid-template-columns:1fr}
  .log-row{flex-wrap:wrap;gap:8px}
  .log-row .price{margin-left:0;text-align:left}
  .proof{grid-template-columns:1fr 1fr}
  .proof>div{padding:18px 14px 16px}
  .proof>div:nth-child(odd){border-left:none;padding-left:0}
  .qa-card{padding:24px 22px 20px}
  .qa-card.offset{margin-left:0}
  .guide-row{flex-wrap:wrap;gap:8px}
  .guide-row .go{margin-left:0}
  th,td{padding:10px 8px}
}