/* x000.info — Khewra galleries: rock-salt mine, pink halite coursing, lamp-lit niches. DM Serif Display + Mulish. */
:root{
  --salt:#F7EFEA;--sheet:#FFFAF7;--ink:#2A1915;--ink-2:#55413B;--ink-3:#735C55;--line:#E6D2C9;
  --rose-1:#F7DDD4;--rose-2:#EDB6A6;--rose-3:#DD8C77;--rose-4:#B8594A;--rose-t:#9E3C2C;
  --cave:#1C1311;--cave-2:#2A1C18;--cave-3:#3D2A24;--silk:#FBEDE7;--dim:#D9C1B8;
  --amber:#F3A33C;--glow:#FFC978;--brine:#1F5F5B;
  --focus:#1F5F5B;
  --f-head:"DM Serif Display",Georgia,"Times New Roman",serif;
  --f-body:"Mulish",system-ui,-apple-system,"Segoe UI",sans-serif;
  --wrap:1240px;--gut:16px;
  --primary:#2A1C18;--accent:#F3A33C;--surface:#FFFAF7;--surface-2:#F7EFEA;--text:#2A1915;--muted:#55413B;--border:#E6D2C9;--font-head:var(--f-head);--font-body:var(--f-body);
  color-scheme:light;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:96px}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
body{margin:0;background:var(--salt);color:var(--ink);font:400 17px/1.7 var(--f-body);overflow-x:hidden}
a{color:var(--brine);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--rose-t)}
:focus-visible{outline:3px solid var(--focus);outline-offset:3px;border-radius:3px}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 var(--gut)}
@media (min-width:700px){:root{--gut:28px}}
@media (min-width:1100px){:root{--gut:40px}}
h1,h2,h3{font-family:var(--f-head);font-weight:400;color:var(--ink);margin:0;text-wrap:balance}
p{margin:0 0 1em}
strong{font-weight:800;color:var(--ink)}
.skip{position:absolute;left:12px;top:-60px;z-index:100;background:var(--amber);color:var(--cave);padding:12px 16px;font-weight:800;text-decoration:none}
.skip:focus{top:12px}

/* brick coursing (two offset rows of halite bricks) */
.course{height:20px;background:
  linear-gradient(90deg,var(--cave) 2px,transparent 2px) 0 0/52px 10px repeat-x,
  linear-gradient(90deg,var(--cave) 2px,transparent 2px) 26px 10px/52px 10px repeat-x,
  linear-gradient(var(--cave),var(--cave)) 0 9px/100% 2px no-repeat,
  linear-gradient(var(--cave),var(--cave)) 0 19px/100% 1px no-repeat,
  repeating-linear-gradient(90deg,#EDB6A6 0 52px,#E09C87 52px 104px,#F4C9BB 104px 156px,#D98A74 156px 208px) 0 0/100% 10px no-repeat,
  repeating-linear-gradient(90deg,#F2C3B4 0 26px,#DD937E 26px 78px,#EAB09F 78px 130px,#F6D3C7 130px 182px,#E3A18D 182px 234px) 0 10px/100% 10px no-repeat;
  box-shadow:0 6px 18px -8px rgba(221,140,119,.55)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:12px 24px;font:800 16px/1.2 var(--f-body);text-decoration:none;border-radius:999px;border:2px solid transparent;transition:background .15s,color .15s,box-shadow .2s,transform .15s;text-align:center}
.btn-dark{background:var(--cave);color:var(--silk);box-shadow:0 10px 26px -10px rgba(184,89,74,.8)}
.btn-dark:hover{color:var(--silk);background:var(--cave-3);transform:translateY(-1px);box-shadow:0 14px 30px -10px rgba(243,163,60,.8)}
.btn-line{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-line:hover{background:var(--rose-1);color:var(--ink)}
.btn-lamp{background:var(--amber);color:var(--cave);box-shadow:0 0 0 4px rgba(243,163,60,.18),0 10px 30px -8px rgba(243,163,60,.8)}
.btn-lamp:hover{background:var(--glow);color:var(--cave)}
.bulb{display:inline-block;width:10px;height:10px;border-radius:50%;background:radial-gradient(circle at 40% 35%,#FFF1CF,var(--amber) 60%);box-shadow:0 0 10px 2px rgba(243,163,60,.75);flex:0 0 auto}
@media (prefers-reduced-motion:no-preference){.bulb{animation:breathe 3.2s ease-in-out infinite}}
@keyframes breathe{50%{box-shadow:0 0 4px 1px rgba(243,163,60,.45)}}

/* ---------- header ---------- */
.hd{position:sticky;top:0;z-index:50;background:var(--cave);color:var(--silk);--focus:#FFC978}
.hd-bar{display:flex;align-items:center;gap:14px;min-height:68px}
.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;color:var(--silk);min-height:44px;flex:0 0 auto}
.brand:hover{color:var(--silk)}
.crystal{position:relative;width:26px;height:34px;flex:0 0 auto;clip-path:polygon(50% 0,100% 22%,100% 76%,50% 100%,0 76%,0 22%);background:linear-gradient(115deg,#FFE3D8 0 34%,#EDB6A6 34% 58%,#D98A74 58% 100%)}
.crystal i{position:absolute;left:50%;top:0;bottom:0;width:1px;background:rgba(255,255,255,.5)}
.crystal::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 50% 70%,rgba(255,201,120,.9),transparent 55%)}
.brand-t{display:flex;flex-direction:column;line-height:1}
.brand-t strong{color:inherit;font:400 23px/1 var(--f-head);letter-spacing:.005em}
.brand-t small{font:700 10.5px/1.2 var(--f-body);letter-spacing:.18em;text-transform:uppercase;color:var(--rose-2);margin-top:5px}
.menu-btn{margin-left:auto;display:inline-flex;align-items:center;gap:10px;min-height:44px;min-width:44px;padding:0 16px;background:transparent;color:var(--silk);border:1.5px solid var(--rose-3);border-radius:999px;font:800 13px/1 var(--f-body);letter-spacing:.12em;text-transform:uppercase;cursor:pointer}
.menu-ic{display:grid;gap:4px;width:18px}
.menu-ic i{display:block;height:2px;border-radius:2px;background:currentColor;transition:transform .2s,opacity .2s}
.menu-ic i:nth-child(2){background:var(--amber)}
.hd.is-open .menu-ic i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.hd.is-open .menu-ic i:nth-child(2){opacity:0}
.hd.is-open .menu-ic i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav ol{list-style:none;margin:0;padding:0}
.nav a{display:flex;align-items:center;text-decoration:none;color:var(--silk);font:700 15px/1.2 var(--f-body)}
.hd-tools{display:none;align-items:center;gap:12px}
.hd-cta{display:inline-flex;align-items:center;gap:10px;min-height:44px;padding:0 18px;background:var(--amber);color:var(--cave);text-decoration:none;border-radius:999px;font:800 14.5px/1 var(--f-body);white-space:nowrap}
.hd-cta:hover{background:var(--glow);color:var(--cave)}
.hd-cta .bulb{background:var(--cave);box-shadow:none;animation:none}
.lsw{display:flex;gap:4px}
.lsw a{min-height:44px;min-width:44px;display:inline-flex;align-items:center;justify-content:center;font:800 13px/1 var(--f-body);text-decoration:none;border-radius:999px;border:1px solid var(--rose-3);color:var(--silk)}
.lsw a[aria-current]{background:var(--silk);color:var(--cave)}
.nav-play{display:none}
@media (max-width:1179.98px){
  .nav{position:absolute;left:0;right:0;top:100%;background:radial-gradient(ellipse at 50% 0,rgba(221,140,119,.28),transparent 70%),var(--cave-2);display:none;max-height:calc(100vh - 80px);overflow:auto;box-shadow:0 30px 50px -20px rgba(0,0,0,.55)}
  .hd.is-open .nav{display:block}
  .nav ol{padding:14px var(--gut) 22px;display:grid;counter-reset:g}
  .nav li{counter-increment:g;border-bottom:1px solid rgba(237,182,166,.16)}
  .nav a{min-height:54px;font:400 21px/1.2 var(--f-head);gap:14px}
  .nav li:not(.nav-play) a::before{content:counter(g,decimal-leading-zero);font:800 12px/1 var(--f-body);color:var(--rose-2);letter-spacing:.06em;width:22px}
  .nav a:hover,.nav a[aria-current]{color:var(--glow)}
}
@media (max-width:639.98px){.nav-play{display:block;border-bottom:0!important;margin-top:14px}.nav .nav-play a{background:var(--amber);color:var(--cave);justify-content:center;border-radius:999px;font:800 16px/1 var(--f-body)}}
@media (min-width:640px){.hd-tools{display:flex;order:3}}
@media (min-width:1180px){
  .menu-btn{display:none}
  .nav{margin-left:auto}
  .nav ol{display:flex;gap:4px}
  .nav a{min-height:44px;padding:0 12px;border-radius:999px;position:relative}
  .nav a:hover{background:var(--cave-3);color:var(--silk)}
  .nav a[aria-current]{background:var(--rose-1);color:var(--cave)}
  .hd-tools{margin-left:8px}
}

/* ---------- home hero ---------- */
.hero{position:relative;background:radial-gradient(ellipse 60% 50% at 88% 20%,rgba(237,182,166,.38),transparent 70%),radial-gradient(ellipse 40% 40% at 10% 90%,rgba(247,221,212,.7),transparent 70%),var(--salt)}
.hero-grid{display:grid;gap:40px;padding-top:36px;padding-bottom:52px}
.kicker{display:inline-flex;align-items:center;gap:10px;font:800 12.5px/1.3 var(--f-body);letter-spacing:.14em;text-transform:uppercase;color:var(--rose-t);background:var(--sheet);border:1px solid var(--rose-2);border-radius:999px;padding:9px 16px;margin-bottom:22px}
.hero h1{font-size:clamp(2.5rem,1.5rem + 4.4vw,5rem);line-height:1.02;letter-spacing:-.012em;margin-bottom:22px;max-width:14ch}
.lead{font-size:clamp(17px,16px + .3vw,19.5px);line-height:1.65;color:var(--ink-2);max-width:60ch}
.lead p:last-child{margin-bottom:0}
.actions{display:flex;flex-wrap:wrap;gap:14px;margin:30px 0 28px}
.feat{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:10px}
.feat li{display:inline-flex;align-items:center;gap:10px;min-height:44px;padding:8px 16px 8px 12px;border-radius:999px;background:var(--rose-1);font:700 14.5px/1.3 var(--f-body);color:var(--ink)}
.feat li::before{content:"";width:11px;height:14px;flex:0 0 auto;clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%);background:linear-gradient(115deg,#fff 0 35%,var(--rose-3) 35%)}
@media (min-width:980px){.hero-grid{grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);align-items:end;padding-top:60px;padding-bottom:72px;gap:60px}}

/* section map: headframe + shaft + galleries cut through salt strata */
.section-map{margin:0;width:100%;max-width:500px;justify-self:center}
.section-map figcaption{font:800 12px/1.4 var(--f-body);letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);margin-bottom:10px;padding-left:4px}
.mine{position:relative;padding:74px 0 0}
.headframe{position:absolute;left:8px;top:0;width:60px;height:76px}
.headframe::before{content:"";position:absolute;inset:14px 0 0;background:linear-gradient(var(--cave),var(--cave)) 50% 0/3px 100% no-repeat,var(--cave);clip-path:polygon(50% 0,100% 100%,91% 100%,50% 14%,9% 100%,0 100%)}
.headframe::after{content:"";position:absolute;left:18px;top:0;width:24px;height:24px;border-radius:50%;border:3px solid var(--cave);background:var(--salt)}
.galleries{position:relative;list-style:none;margin:0;padding:16px 12px 22px 0;border-radius:4px 22px 22px 22px;background:
  linear-gradient(180deg,transparent 0 13%,rgba(184,89,74,.22) 13% 14%,transparent 14% 38%,rgba(184,89,74,.18) 38% 39.5%,transparent 39.5% 64%,rgba(184,89,74,.24) 64% 65%,transparent 65% 86%,rgba(184,89,74,.18) 86% 87%,transparent 87%),
  linear-gradient(180deg,#F6D9CF,#EFBFB0 30%,#F4CFC3 52%,#E6A796 78%,#DE9985);
  box-shadow:inset 0 3px 0 var(--cave);display:grid;gap:8px}
.galleries::before{content:"";position:absolute;left:30px;top:0;bottom:0;width:16px;background:repeating-linear-gradient(180deg,transparent 0 12px,rgba(251,237,231,.5) 12px 14px),var(--cave);border-radius:0 0 4px 4px}
.galleries li{position:relative;padding-left:38px}
.galleries li:nth-child(odd){margin-right:10%}
.galleries li:nth-child(3n){margin-right:22%}
.galleries a{position:relative;display:flex;align-items:center;gap:12px;min-height:48px;padding:8px 18px 8px 22px;border-radius:0 999px 999px 0;background:linear-gradient(90deg,var(--cave) 0,var(--cave-2) 70%,var(--cave-3));color:var(--silk);text-decoration:none;font:700 15px/1.25 var(--f-body);box-shadow:inset 0 -2px 0 rgba(0,0,0,.3),inset 0 2px 0 rgba(237,182,166,.15);transition:color .2s}
.galleries .lv{font:800 12px/1 var(--f-body);letter-spacing:.06em;color:var(--rose-2)}
.galleries a::after{content:"";margin-left:auto;width:8px;height:8px;border-radius:50%;background:var(--rose-3);box-shadow:0 0 0 3px rgba(221,140,119,.2);flex:0 0 auto}
.galleries a:hover{color:var(--glow)}
.galleries a:hover::after{background:var(--glow);box-shadow:0 0 12px 3px rgba(255,201,120,.7)}
.galleries a:focus-visible{outline-color:var(--cave)}

/* ---------- cave band (game) ---------- */
.cave{position:relative;background:radial-gradient(ellipse 55% 60% at 70% 45%,rgba(221,140,119,.26),transparent 70%),linear-gradient(180deg,#140D0C,var(--cave) 30%,#170F0D);color:var(--dim);padding:56px 0 64px;--focus:#FFC978;overflow:hidden}
.cave-grid{display:grid;gap:36px}
.eyebrow{font:800 12.5px/1.3 var(--f-body);letter-spacing:.16em;text-transform:uppercase;color:var(--rose-2);margin-bottom:12px}
.cave h2{color:var(--silk);font-size:clamp(2.1rem,1.5rem + 2.4vw,3.3rem);line-height:1.05;margin-bottom:14px}
.cave-note>p{color:var(--dim)}
.steps{list-style:none;counter-reset:s;margin:24px 0;padding:0;display:grid;gap:10px}
.steps li{counter-increment:s;display:grid;grid-template-columns:46px 1fr;gap:14px;align-items:center;color:var(--silk);font-weight:600}
.steps li::before{content:counter(s);display:grid;place-items:center;width:46px;height:46px;border-radius:50% 50% 12px 12px;font:400 22px/1 var(--f-head);color:var(--cave);background:radial-gradient(circle at 50% 40%,#FFE2C2,var(--rose-2) 70%);box-shadow:0 0 18px -2px rgba(237,182,166,.55)}
.fig{font-size:14.5px;line-height:1.55;color:#C9B2A9;border-left:2px solid var(--amber);padding-left:14px;margin:0;font-style:italic}
.niche{position:relative;padding:12px;border-radius:50% 50% 22px 22px/150px 150px 22px 22px;background:
  linear-gradient(90deg,rgba(28,19,17,.85) 2px,transparent 2px) 0 0/44px 18px,
  linear-gradient(rgba(28,19,17,.85) 2px,transparent 2px) 0 0/44px 18px,
  linear-gradient(160deg,#F4C9BB,#DD8C77 50%,#B8594A);box-shadow:0 0 60px -6px rgba(237,150,120,.55),0 0 0 1px #0d0807;margin:0 calc(var(--gut) * -1 + 4px);min-width:0}
.niche-in{position:relative;border-radius:50% 50% 14px 14px/140px 140px 14px 14px;background:radial-gradient(ellipse 80% 45% at 50% 0,rgba(255,201,120,.22),transparent 70%),linear-gradient(180deg,#34211C,#221613 55%,#1B110F);padding:72px 14px 16px;box-shadow:inset 0 0 0 1px rgba(237,182,166,.35),inset 0 10px 40px -10px rgba(255,201,120,.35)}
.niche-in::before{content:"";position:absolute;left:50%;top:22px;width:18px;height:22px;margin-left:-9px;border-radius:50% 50% 40% 40%/60% 60% 40% 40%;background:radial-gradient(circle at 50% 60%,#FFF1CF,var(--amber) 55%,#C8641D);box-shadow:0 0 26px 8px rgba(243,163,60,.45)}
@media (prefers-reduced-motion:no-preference){.niche-in::before{animation:flick 4s ease-in-out infinite}}
@keyframes flick{50%{box-shadow:0 0 18px 5px rgba(243,163,60,.35)}}
@media (min-width:700px){.niche{margin:0;padding:16px}.niche-in{padding:84px 22px 20px}}
@media (min-width:1000px){.cave{padding:76px 0 84px}.cave-grid{grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:64px;align-items:start}.cave-note{position:sticky;top:120px;padding-top:110px}.niche{max-width:640px;justify-self:end;width:100%}}

/* ---------- document ---------- */
.doc{padding:44px 0 60px}
.doc-grid{display:grid;gap:28px}
.sheet{min-width:0;font-size:17.5px}
.sheet>:first-child{margin-top:0}
.intro-rest{font-size:18.5px;color:var(--ink-2);margin-bottom:8px;max-width:66ch}
.sec{position:relative;margin-top:48px;padding-top:44px}
.sec::before{content:"";position:absolute;left:0;right:0;top:0;height:10px;opacity:.6;background:
  linear-gradient(90deg,var(--salt) 2px,transparent 2px) 0 0/40px 5px repeat-x,
  linear-gradient(90deg,var(--salt) 2px,transparent 2px) 20px 5px/40px 5px repeat-x,
  linear-gradient(var(--salt),var(--salt)) 0 4px/100% 1px no-repeat,
  linear-gradient(90deg,var(--rose-2),var(--rose-3) 50%,var(--rose-1))}
.sheet>.sec:first-child{margin-top:0;padding-top:0}
.sheet>.sec:first-child::before{display:none}
.sec-head{display:flex;gap:16px;align-items:flex-start;margin-bottom:18px}
.brick{flex:0 0 auto;display:grid;place-items:center;width:54px;height:36px;margin-top:4px;font:400 20px/1 var(--f-head);color:var(--cave);background:linear-gradient(135deg,#FBE3DA,var(--rose-2) 60%,var(--rose-3));clip-path:polygon(7px 0,calc(100% - 7px) 0,100% 7px,100% calc(100% - 7px),calc(100% - 7px) 100%,7px 100%,0 calc(100% - 7px),0 7px)}
.sec h2{font-size:clamp(1.75rem,1.3rem + 1.6vw,2.55rem);line-height:1.1;scroll-margin-top:100px}
.sec-body{max-width:68ch}
.sec-body h3{font-size:1.45rem;line-height:1.2;margin:1.6em 0 .5em}
.sec-body ul,.sec-body ol,.intro-rest ul,.intro-rest ol{margin:0 0 1.2em;padding:0;list-style:none}
.sec-body ul li,.intro-rest ul li{position:relative;padding:5px 0 5px 28px}
.sec-body ul li::before,.intro-rest ul li::before{content:"";position:absolute;left:4px;top:.72em;width:11px;height:14px;clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%);background:linear-gradient(115deg,#FBE3DA 0 35%,var(--rose-3) 35%)}
.sec-body ol,.intro-rest ol{counter-reset:o;display:grid;gap:8px}
.sec-body ol li,.intro-rest ol li{counter-increment:o;position:relative;padding:12px 14px 12px 58px;background:var(--sheet);border:1px solid var(--line);border-radius:14px}
.sec-body ol li::before,.intro-rest ol li::before{content:counter(o);position:absolute;left:14px;top:9px;width:32px;height:32px;display:grid;place-items:center;border-radius:50%;background:var(--cave);color:var(--glow);font:400 18px/1 var(--f-head)}
@media (min-width:1100px){.doc-grid{grid-template-columns:270px minmax(0,1fr);gap:64px;align-items:start}.sheet{max-width:780px}}

/* FAQ with salt-lamp toggles */
.faq-list{display:grid;gap:10px}
.faq details{background:var(--sheet);border:1px solid var(--line);border-radius:18px;transition:box-shadow .2s,border-color .2s}
.faq details[open]{border-color:var(--rose-2);box-shadow:0 12px 30px -18px rgba(184,89,74,.6)}
.faq summary{display:flex;gap:16px;align-items:center;justify-content:space-between;min-height:62px;padding:12px 16px 12px 20px;cursor:pointer;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.q-t{font:800 17px/1.35 var(--f-body);color:var(--ink)}
.lamp{position:relative;flex:0 0 auto;width:26px;height:34px}
.lamp i{position:absolute;left:3px;right:3px;top:0;bottom:7px;border-radius:50% 50% 42% 42%/58% 58% 42% 42%;background:linear-gradient(135deg,#FBE3DA,var(--rose-2));transition:background .25s,box-shadow .25s}
.lamp::after{content:"";position:absolute;left:1px;right:1px;bottom:0;height:6px;border-radius:2px;background:var(--cave-3)}
details[open]>summary .lamp i{background:radial-gradient(circle at 50% 62%,#FFF1CF,var(--amber) 60%,#D9772B);box-shadow:0 0 16px 4px rgba(243,163,60,.55)}
.faq summary:hover .q-t{color:var(--rose-t)}
.q-a{padding:0 20px 18px;color:var(--ink-2)}
.q-a>:last-child{margin-bottom:0}

/* CTA niche */
.cta-niche{position:relative;margin-top:52px;padding:64px 28px 30px;border-radius:50% 50% 22px 22px/90px 90px 22px 22px;background:radial-gradient(ellipse 70% 50% at 50% 0,rgba(255,201,120,.3),transparent 70%),linear-gradient(180deg,#34211C,var(--cave));color:var(--silk);text-align:center;box-shadow:0 0 0 6px var(--rose-2),0 18px 40px -16px rgba(184,89,74,.7);--focus:#FFC978}
.cta-niche::before{content:"";position:absolute;left:50%;top:22px;width:16px;height:20px;margin-left:-8px;border-radius:50% 50% 40% 40%/60% 60% 40% 40%;background:radial-gradient(circle at 50% 60%,#FFF1CF,var(--amber) 55%,#C8641D);box-shadow:0 0 22px 6px rgba(243,163,60,.45)}
.cta-niche p{font:400 clamp(20px,17px + .8vw,26px)/1.35 var(--f-head);max-width:40ch;margin:0 auto 22px;color:var(--silk)}

/* rail: descending shaft contents + demo niche */
.rail{min-width:0}
.rail-in{display:grid;gap:24px}
.shaft{background:var(--sheet);border:1px solid var(--line);border-radius:18px;overflow:hidden}
.shaft summary{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:56px;padding:8px 18px;cursor:pointer;list-style:none;font:800 12.5px/1.2 var(--f-body);letter-spacing:.14em;text-transform:uppercase;color:var(--rose-t)}
.shaft summary::-webkit-details-marker{display:none}
.shaft ol{position:relative;list-style:none;margin:0;padding:4px 14px 16px 14px}
.shaft ol::before{content:"";position:absolute;left:28px;top:0;bottom:16px;width:6px;border-radius:3px;background:repeating-linear-gradient(180deg,var(--cave-3) 0 8px,var(--rose-2) 8px 10px)}
.shaft a{position:relative;display:grid;grid-template-columns:34px 1fr;gap:12px;align-items:center;min-height:46px;padding:6px 8px 6px 0;text-decoration:none;color:var(--ink);font:600 15px/1.35 var(--f-body)}
.shaft .lv{position:relative;z-index:1;display:grid;place-items:center;width:34px;height:26px;border-radius:6px;background:var(--sheet);border:1.5px solid var(--rose-2);font:800 11px/1 var(--f-body);color:var(--ink-3);transition:background .2s,border-color .2s,color .2s,box-shadow .2s}
.shaft a:hover .tl{color:var(--rose-t)}
.shaft a.is-cur .lv{background:var(--cave);border-color:var(--amber);color:var(--glow);box-shadow:0 0 0 3px rgba(243,163,60,.25),0 0 14px rgba(243,163,60,.5)}
.shaft a.is-cur .tl{font-weight:800}
.mini-niche{position:relative;border-radius:50% 50% 18px 18px/70px 70px 18px 18px;padding:56px 22px 24px;background:radial-gradient(ellipse 70% 45% at 50% 0,rgba(255,201,120,.3),transparent 70%),linear-gradient(180deg,#34211C,var(--cave));color:var(--dim);text-align:center;box-shadow:0 0 0 5px var(--rose-2);--focus:#FFC978}
.mini-niche::before{content:"";position:absolute;left:50%;top:18px;width:14px;height:18px;margin-left:-7px;border-radius:50% 50% 40% 40%/60% 60% 40% 40%;background:radial-gradient(circle at 50% 60%,#FFF1CF,var(--amber) 55%,#C8641D);box-shadow:0 0 20px 5px rgba(243,163,60,.45)}
.mini-niche strong{display:block;font:400 25px/1.1 var(--f-head);color:var(--silk);margin-bottom:8px}
.mini-niche p{font-size:15px;line-height:1.55}
.mini-niche .btn{width:100%;padding:12px 16px}
@media (max-width:1099.98px){.mini-niche{display:none}}
@media (min-width:700px) and (max-width:1099.98px){.shaft ol{columns:2;column-gap:20px}.shaft ol::before{display:none}.shaft li{break-inside:avoid}}
@media (min-width:1100px){.rail-in{position:sticky;top:104px}.shaft summary{pointer-events:none}.shaft summary .lamp{display:none}}

/* ---------- inner page head ---------- */
.ph{position:relative;background:radial-gradient(ellipse 50% 70% at 85% 50%,rgba(237,182,166,.4),transparent 70%),var(--salt);border-bottom:1px solid var(--line)}
.ph-grid{display:grid;gap:24px;padding-top:26px;padding-bottom:40px;align-items:center;isolation:isolate}
.crumbs ol{list-style:none;margin:0 0 16px;padding:0;display:flex;flex-wrap:wrap;align-items:center;font:700 14px/1.3 var(--f-body)}
.crumbs li{display:inline-flex;align-items:center}
.crumbs li+li::before{content:"";width:7px;height:9px;margin:0 12px;clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%);background:var(--rose-3)}
.crumbs a{color:var(--brine);display:inline-flex;align-items:center;min-height:44px}
.crumbs span{color:var(--ink-3)}
.ph h1{font-size:clamp(2.3rem,1.4rem + 3.6vw,4.2rem);line-height:1.04;letter-spacing:-.01em;margin-bottom:18px;max-width:18ch}
.lamp-block{display:none;justify-self:center;position:relative;width:200px;height:230px}
.lamp-block::before{content:"";position:absolute;inset:0 0 34px;clip-path:polygon(22% 4%,58% 0,86% 14%,100% 46%,92% 100%,8% 100%,0 52%,6% 20%);background:radial-gradient(circle at 50% 62%,#FFE7C4 0,#F7B98E 26%,#E58C73 52%,#B8594A 85%)}
.lamp-block::after{content:"";position:absolute;left:28px;right:28px;bottom:0;height:34px;border-radius:6px;background:linear-gradient(180deg,#5A3A2E,var(--cave-2))}
.lamp-block span{position:absolute;inset:-20px -30px 20px;border-radius:50%;background:radial-gradient(circle,rgba(255,190,120,.45),transparent 65%);z-index:-1}
@media (prefers-reduced-motion:no-preference){.lamp-block span{animation:halo 5s ease-in-out infinite}}
@keyframes halo{50%{opacity:.55;transform:scale(.94)}}
@media (min-width:860px){.ph-grid{grid-template-columns:minmax(0,1fr) 240px;padding-top:32px;padding-bottom:56px}.lamp-block{display:block}}

/* ---------- related: salt slabs ---------- */
.related{padding:0 0 72px}
.related h2{font-size:clamp(1.9rem,1.4rem + 1.6vw,2.6rem);margin-bottom:22px}
.slabs{list-style:none;margin:0;padding:0;display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(min(100%,250px),1fr))}
.slab{display:flex;flex-direction:column;gap:8px;height:100%;padding:22px 22px 24px;text-decoration:none;color:var(--ink);background:linear-gradient(150deg,#FCE6DE,#F2C5B7 55%,#E9AE9C);clip-path:polygon(14px 0,calc(100% - 14px) 0,100% 14px,100% calc(100% - 14px),calc(100% - 14px) 100%,14px 100%,0 calc(100% - 14px),0 14px);transition:filter .2s}
.slab:hover{color:var(--ink);filter:brightness(1.05) saturate(1.1)}
.slab:focus-visible{outline:none;box-shadow:inset 0 0 0 3px var(--brine)}
.slab-no{font:400 30px/1 var(--f-head);color:var(--rose-t)}
.slab strong{font:400 23px/1.15 var(--f-head)}
.rd{font-size:15.5px;line-height:1.55;color:var(--ink-2)}

/* ---------- footer ---------- */
.ft{background:var(--cave);color:var(--dim);padding:0 0 22px;--focus:#FFC978}
.course-ft{box-shadow:0 -6px 18px -8px rgba(221,140,119,.55)}
.ft-grid{display:grid;gap:32px;padding-top:40px;padding-bottom:30px}
.notice{margin-top:20px;border-radius:16px;border:1px solid rgba(237,182,166,.3);padding:16px 18px;max-width:520px}
.notice-t{font:800 12px/1.2 var(--f-body);letter-spacing:.16em;text-transform:uppercase;color:var(--glow);margin-bottom:8px}
.notice p:last-child{margin:0;font-size:15px;line-height:1.6}
.ft-nav h2{font:800 12.5px/1.2 var(--f-body);letter-spacing:.16em;text-transform:uppercase;color:var(--rose-2);margin-bottom:10px}
.ft-nav ul{list-style:none;margin:0;padding:0}
.ft-nav a{display:flex;align-items:center;min-height:44px;color:var(--silk);text-decoration:none;border-bottom:1px solid rgba(237,182,166,.12);font-size:16px}
.ft-nav a:hover{color:var(--glow)}
.ft-bottom{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding-top:20px;font:600 14px/1.3 var(--f-body);color:#C4ACA3;position:relative}
.ft-bottom::before{content:"";position:absolute;left:var(--gut);right:var(--gut);top:0;height:1px;background:rgba(237,182,166,.2)}
.age{display:inline-grid;place-items:center;width:48px;height:48px;border-radius:50%;background:radial-gradient(circle at 50% 40%,#FFE2C2,var(--amber));color:var(--cave);font:800 14px/1 var(--f-body);box-shadow:0 0 18px -2px rgba(243,163,60,.6)}
@media (min-width:760px){.ft-grid{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr) minmax(0,1fr);gap:44px}}

/* ---------- 404 ---------- */
.nf{padding:64px 0 90px}
.nf h1{font-size:clamp(2.3rem,1.5rem + 3vw,3.8rem);margin-bottom:12px}
.nf-no{font:400 clamp(4rem,14vw,8rem)/1 var(--f-head);color:var(--rose-3);margin-bottom:8px}

@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}