:root{--ink:#111;--paper:#f6f4ef;--paper-2:#ecE8df;--sea:#0a6c8a;--sea-l:#3fb7d6;--text:#222;--muted:#6b6862;--line:#d9d4c8}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--text);font-family:"IBM Plex Sans",system-ui,sans-serif;font-size:17px;line-height:1.75}
h1,h2,h3{font-family:"Instrument Serif",Georgia,serif;font-weight:400;color:var(--ink);line-height:1.05;margin:0 0 .45em;letter-spacing:-.01em}
h1{font-size:clamp(2.8rem,7vw,5.6rem)}h2{font-size:clamp(1.8rem,3vw,2.4rem)}
em{font-style:italic}
p{margin:0 0 1em}a{color:var(--sea)}a:hover{color:var(--ink)}
.wrap{width:min(1180px,100% - 32px);margin-inline:auto}
.mono{font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:.76rem;letter-spacing:.08em;text-transform:uppercase}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:8px;background:var(--ink);color:#fff;padding:8px 12px;z-index:99}
.ic{width:18px;height:18px;flex:none}
.wave{display:block;width:100%;height:12px;color:var(--sea-l)}
.kick{color:var(--sea);margin-bottom:1.2em}
.dek{font-size:1.2rem;color:var(--muted);max-width:640px}
.btn{display:inline-flex;align-items:center;gap:10px;background:var(--ink);color:var(--paper);font:inherit;font-weight:500;padding:.85em 1.4em;border:0;cursor:pointer;text-decoration:none;transition:.2s}.btn:hover{background:var(--sea);color:#fff}
/* header */
.hdr{position:sticky;top:0;z-index:50;background:var(--paper);border-bottom:1px solid var(--ink)}
.hdr-in{display:flex;align-items:center;justify-content:space-between;height:64px;position:relative;gap:20px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex:none}.logo{width:36px;height:36px}
.brand b{display:block;font-family:"Instrument Serif",serif;font-weight:400;font-size:1.5rem;color:var(--ink);line-height:1}.brand small{font-family:"IBM Plex Mono",monospace;font-size:.66rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.nav ul{display:flex;list-style:none;margin:0;padding:0;white-space:nowrap}
.nav a{display:block;padding:8px 11px;text-decoration:none;color:var(--text);font-size:.88rem;font-weight:500;position:relative}
.nav a::after{content:"";position:absolute;left:11px;right:11px;bottom:2px;height:1px;background:var(--ink);transform:scaleX(0);transition:.2s}
.nav a:hover::after,.nav a.on::after{transform:scaleX(1)}.nav a.on{color:var(--sea)}.nav a.on::after{background:var(--sea);height:2px}
.menu-btn{display:none;font-family:"IBM Plex Mono",monospace;font-size:.8rem;letter-spacing:.1em;text-transform:uppercase;background:none;border:1px solid var(--ink);padding:8px 14px;cursor:pointer}
@media(max-width:1040px){.menu-btn{display:block}.nav{display:none;position:absolute;top:100%;left:-16px;right:-16px;background:var(--paper);border-bottom:1px solid var(--ink);padding:8px 16px 16px}.nav.open{display:block}.nav ul{flex-direction:column}.nav a{padding:12px 0;border-bottom:1px solid var(--line)}.nav a::after{display:none}}
/* cover */
.cover{background:var(--ink);color:#d9d6cf;padding:90px 0 0;overflow:hidden}
.cover-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:60px;align-items:end;padding-bottom:70px}
.cover h1{color:var(--paper);font-size:clamp(3.4rem,10vw,8rem);line-height:.9}.cover h1 em{color:var(--sea-l)}
.cover .kick{color:var(--sea-l)}.cover .dek{color:#bdb9b1}
.spec{margin:0;border-top:1px solid #444}.spec div{display:grid;grid-template-columns:130px 1fr;gap:12px;padding:12px 0;border-bottom:1px solid #333}
.spec dt{color:#8e8a82}.spec dd{margin:0;color:var(--paper)}
.cover-wave{display:grid;gap:6px;padding-bottom:20px;opacity:.7}
/* toc home */
.toc-home{padding:80px 0}
.chapters{list-style:none;margin:0;padding:0;border-top:1px solid var(--ink)}
.chapters a{display:grid;grid-template-columns:110px 1fr 1.2fr 30px;gap:24px;align-items:center;padding:28px 0;border-bottom:1px solid var(--line);text-decoration:none;color:var(--text);transition:.25s}
.chapters .n{font-family:"Instrument Serif",serif;font-size:3.6rem;line-height:1;color:var(--sea)}
.chapters .t{font-family:"Instrument Serif",serif;font-size:2.2rem;color:var(--ink);line-height:1.1}
.chapters .d{color:var(--muted)}.chapters .ic{width:24px;height:24px;transition:.25s}
.chapters a:hover{padding-left:16px;background:var(--paper-2)}.chapters a:hover .ic{transform:translateX(6px);color:var(--sea)}
.kstrip{padding:0 0 80px}
.ks-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.ks-head .kick{margin:0}
.more{display:inline-flex;align-items:center;gap:6px;color:var(--ink);text-decoration:none}.more:hover{color:var(--sea)}
.ks{display:grid;grid-template-columns:repeat(6,1fr);border:1px solid var(--ink)}
.ks a{display:flex;flex-direction:column;gap:20px;padding:18px;border-left:1px solid var(--ink);text-decoration:none;color:var(--ink);font-family:"Instrument Serif",serif;font-size:1.35rem;line-height:1.1;transition:.2s}.ks a:first-child{border-left:0}
.ks a span{color:var(--sea)}.ks a:hover{background:var(--ink);color:var(--paper)}.ks a:hover span{color:var(--sea-l)}
.pull{background:var(--paper-2);padding:80px 0;border-top:1px solid var(--line)}
.pull blockquote{margin:0 0 24px;font-family:"Instrument Serif",serif;font-size:clamp(1.8rem,3.6vw,3rem);line-height:1.15;color:var(--ink);max-width:900px}.pull em{color:var(--sea)}
/* chapter opener */
.ch-open{padding:50px 0 60px;border-bottom:1px solid var(--ink)}.ch-open.sub{background:var(--paper-2)}
.crumbs{color:var(--muted);margin-bottom:40px}.crumbs a{color:var(--muted);text-decoration:none}.crumbs a:hover{color:var(--sea)}.crumbs [aria-current]{color:var(--ink)}
.ch-grid{display:grid;grid-template-columns:220px 1fr;gap:40px;align-items:start}
.numeral{font-family:"Instrument Serif",serif;font-size:clamp(5rem,12vw,10rem);line-height:.8;color:var(--sea)}.numeral.sm{font-size:clamp(3.6rem,8vw,6rem)}
/* article */
.article{display:grid;grid-template-columns:240px 1fr;gap:60px;padding:60px 0 80px}
.toc{position:sticky;top:88px;align-self:start;font-size:.95rem}.toc .mono{color:var(--muted);margin:0 0 10px}
.toc ol{list-style:none;padding:0;margin:0 0 24px;border-left:1px solid var(--line);counter-reset:t}
.toc ol a{display:block;padding:6px 0 6px 16px;margin-left:-1px;border-left:2px solid transparent;text-decoration:none;color:var(--muted);counter-increment:t}
.toc ol a::before{content:counter(t,decimal-leading-zero) "  ";font-family:"IBM Plex Mono",monospace;font-size:.72rem;color:var(--sea)}
.toc ol a:hover,.toc ol a.on{color:var(--ink);border-left-color:var(--sea)}
.content{max-width:720px}
.part{padding-bottom:36px;margin-bottom:36px;border-bottom:1px solid var(--line);scroll-margin-top:88px}.part:last-child{border-bottom:0}
.tbl{width:100%;border-collapse:collapse;margin:8px 0}.tbl th,.tbl td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line)}.tbl th{border-bottom:1px solid var(--ink);font-weight:600}.tbl td.mono{color:var(--sea);font-size:.85rem}
.callout{border:1px solid var(--ink);padding:20px 22px;margin-top:20px;background:#fff}.callout .mono{color:var(--sea);margin-bottom:6px}.callout p:last-child{margin:0}
.dash{list-style:none;padding:0;margin:0 0 1em}.dash li{padding:10px 0 10px 28px;border-bottom:1px dashed var(--line);position:relative}.dash li::before{content:"—";position:absolute;left:0;color:var(--sea)}
.kdata{margin:0 0 26px}.kdata div{padding:10px 0;border-bottom:1px solid var(--line)}.kdata dt{color:var(--muted)}.kdata dd{margin:2px 0 0}
.others{list-style:none;padding:0;margin:0}.others a{display:block;padding:5px 0;text-decoration:none;color:var(--muted)}.others a:hover{color:var(--sea)}
.mapmini{margin-top:10px;border:1px solid var(--ink)}.mapmini iframe{display:block;width:100%;height:220px;border:0}
/* kodim grid */
.kgrid-sec{padding:60px 0 80px}
.kgrid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--ink);border-left:1px solid var(--ink)}
.kcard{display:flex;flex-direction:column;padding:28px;border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);text-decoration:none;color:var(--text);transition:.2s;min-height:320px}
.kno{color:var(--sea)}.kcard h2{margin:10px 0 4px;font-size:2.2rem}.kat{color:var(--muted);margin-bottom:14px}.kcard p:not(.mono){color:var(--muted);font-size:.95rem;flex:1}
.go{display:inline-flex;align-items:center;gap:6px;color:var(--ink)}.kcard:hover{background:var(--ink);color:var(--paper)}.kcard:hover h2{color:var(--paper)}.kcard:hover p:not(.mono){color:#bdb9b1}.kcard:hover .go{color:var(--sea-l)}.kcard:hover .kno{color:var(--sea-l)}
.note{color:var(--muted);font-size:.92rem;margin-top:24px;max-width:720px}
/* indeks */
.letters{display:flex;flex-wrap:wrap;gap:4px;margin-bottom:20px}.letters span{width:30px;height:30px;display:grid;place-items:center;border:1px solid var(--ink);font-family:"Instrument Serif",serif;font-size:1.1rem}
.gloss{margin:0}.term{display:grid;grid-template-columns:180px 1fr;gap:20px;padding:14px 0;border-bottom:1px solid var(--line)}
.term dt{font-family:"Instrument Serif",serif;font-size:1.4rem;color:var(--ink)}.term dd{margin:0;color:var(--muted)}.term dd a{white-space:nowrap}
.faq{border-top:1px solid var(--ink)}
details{border-bottom:1px solid var(--line)}summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:16px;padding:18px 0;font-weight:500;color:var(--ink)}
summary::-webkit-details-marker{display:none}summary::after{content:"+";font-family:"IBM Plex Mono",monospace;color:var(--sea)}details[open] summary::after{content:"−"}details p{color:var(--muted);margin:0;padding-bottom:18px}
/* form */
.form{display:grid;gap:18px}.form label{display:grid;gap:6px}.form .mono{color:var(--muted)}
.form input,.form select,.form textarea{font:inherit;padding:12px 0;border:0;border-bottom:1px solid var(--ink);background:transparent;border-radius:0}
.form select{padding:12px 0}.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-bottom:2px solid var(--sea)}.form .bad{border-bottom-color:#b3261e}
.form .btn{justify-self:start;margin-top:6px}.form-msg{margin:0;color:var(--sea);font-weight:500}.form-msg.err{color:#b3261e}
/* pager */
.pager{display:grid;grid-template-columns:1fr 1fr;gap:0;border-top:1px solid var(--ink);margin-bottom:0}
.pg{display:flex;align-items:center;gap:14px;padding:28px 0;text-decoration:none;color:var(--ink);font-family:"Instrument Serif",serif;font-size:1.6rem;line-height:1.1}
.pg small{display:block;color:var(--muted);margin-bottom:6px;font-family:"IBM Plex Mono",monospace;font-size:.72rem}
.pg.next{justify-content:flex-end;text-align:right;border-left:1px solid var(--line);padding-left:20px}.pg.prev{padding-right:20px}
.pg .ic{width:26px;height:26px;color:var(--sea);transition:.2s}.pg.next:hover .ic{transform:translateX(6px)}.pg.prev:hover .ic{transform:translateX(-6px)}.pg:hover{color:var(--sea)}
/* footer */
.ftr{background:var(--ink);color:#a9a59d;padding:50px 0 24px}
.ftr-wave{margin-bottom:40px;opacity:.6}
.ftr-grid{display:grid;grid-template-columns:1.4fr 1fr 1.1fr 1fr;gap:36px;padding-bottom:36px;border-bottom:1px solid #333}
.ftr .brand b{color:var(--paper)}.ftr .brand small{color:#8e8a82}.ftr-grid>div:first-child p{margin-top:14px;font-size:.93rem}
.ftr .mono{color:var(--sea-l);margin-bottom:12px}
.ftr ul{list-style:none;padding:0;margin:0;display:grid;gap:6px;font-size:.93rem}.ftr a{color:#e4e1da;text-decoration:none}.ftr a:hover{color:var(--sea-l)}
.chap-list span{display:inline-block;width:26px;font-family:"Instrument Serif",serif;color:var(--sea-l)}
.ftr-bot{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;padding-top:20px;font-size:.85rem}.ftr-bot .mono{margin:0;color:#8e8a82}
@media(max-width:980px){.cover-grid{grid-template-columns:1fr;gap:36px}.chapters a{grid-template-columns:70px 1fr 26px}.chapters .d{grid-column:2;grid-row:2;margin-top:-14px}.chapters .ic{grid-row:1/3;grid-column:3}.chapters .n{font-size:2.6rem}.ks{grid-template-columns:repeat(3,1fr)}.ks a:nth-child(4){border-left:0}.ks a:nth-child(n+4){border-top:1px solid var(--ink)}.article{grid-template-columns:1fr;gap:30px}.toc{position:static;border-bottom:1px solid var(--line);padding-bottom:20px}.kgrid{grid-template-columns:1fr 1fr}.ftr-grid{grid-template-columns:1fr 1fr}.ch-grid{grid-template-columns:1fr;gap:10px}}
@media(max-width:600px){body{font-size:16px}.cover{padding-top:60px}.toc-home{padding:56px 0}.chapters .t{font-size:1.7rem}.ks{grid-template-columns:1fr 1fr}.ks a:nth-child(odd){border-left:0}.ks a:nth-child(4){border-left:1px solid var(--ink)}.ks a:nth-child(n+3){border-top:1px solid var(--ink)}.kgrid{grid-template-columns:1fr}.kcard{min-height:0}.term{grid-template-columns:1fr;gap:4px}.pager{grid-template-columns:1fr}.pg.next{border-left:0;border-top:1px solid var(--line);padding-left:0}.pg{font-size:1.3rem}.ftr-grid{grid-template-columns:1fr}.spec div{grid-template-columns:110px 1fr}.brand small{display:none}}