:root{
  color-scheme:light dark;
  --bg:light-dark(#EDE8E1,#15131C); --bg2:light-dark(#E5DFD7,#1C1925); --card:light-dark(#FAF8F5,#221E2B); --line:light-dark(#D6CDC1,#332D40);
  --track:light-dark(#D6CDC1,#352E45);
  --ink:light-dark(#1A1622,#F4F1EC); --mut:light-dark(#5E5670,#A79FB5);
  --glass:light-dark(rgba(237,232,225,.8),rgba(21,19,28,.74));
  --tint:light-dark(rgba(0,0,0,.03),rgba(255,255,255,.03));
  --gold-t:light-dark(#905300,#FFB700); --orange-t:light-dark(#A54408,#FF7A18);
  --gold:#FFB700; --orange:#FF7A18;
  --grad:linear-gradient(135deg,var(--orange),var(--gold));
  --max:860px;
}
html[data-theme=light]{color-scheme:light}
html[data-theme=dark]{color-scheme:dark}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.6 "Inter",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
p a,td a,li a,summary+p a{color:var(--orange-t);text-decoration:underline;text-underline-offset:3px}
img,svg{display:block;max-width:100%}
h1,h2{line-height:1.15;letter-spacing:-.02em;margin:0 0 .5em}
h1{font-size:clamp(2.1rem,5vw,3.4rem);font-weight:800}
h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:750}
p{margin:0 0 1em;color:var(--mut)}
.wrap{max-width:var(--max);margin:0 auto;padding:0 22px}
section{padding:clamp(40px,6vw,72px) 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:.8rem;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;color:var(--gold-t);margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--gold);opacity:.6}
.lead{font-size:clamp(1.02rem,1.6vw,1.2rem);max-width:60ch}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:14px 24px;border-radius:999px;font-weight:650;font-size:.98rem;
  background:var(--grad);color:#1A0F00;box-shadow:0 10px 30px -12px rgba(255,122,24,.75);
}
.hero{background:radial-gradient(60% 80% at 15% 0,rgba(255,122,24,.16),transparent 70%),radial-gradient(50% 70% at 90% 0,rgba(141,21,58,.28),transparent 72%)}

/* header */
header{position:sticky;top:0;z-index:50;background:var(--glass);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:16px;height:70px}
.logo{display:flex;align-items:center;gap:10px;margin-right:auto}
.logo em{font-style:normal;font-weight:500;font-size:.9rem;color:var(--mut)}
.logo img{height:36px;width:auto}
.logo .dk,html[data-theme=dark] .logo .lt{display:none}
html[data-theme=dark] .logo .dk{display:block}
@media (prefers-color-scheme:dark){html:not([data-theme=light]) .logo .lt{display:none}html:not([data-theme=light]) .logo .dk{display:block}}
#lang{display:flex;gap:3px;padding:3px;border:1px solid var(--line);border-radius:999px;background:var(--tint)}
#lang a{font:inherit;text-decoration:none;font-size:.82rem;font-weight:600;color:var(--mut);background:none;border:0;padding:6px 13px;border-radius:999px;cursor:pointer;line-height:1.4}
#lang a:hover{color:var(--ink)}
#lang a.on{background:var(--grad);color:#1A0F00}
#theme{position:relative;display:flex;align-items:center;justify-content:space-between;width:60px;height:30px;padding:0 7px;flex:none;border-radius:999px;border:1px solid var(--line);background:var(--track);cursor:pointer}
#theme::before{content:"";position:absolute;top:2px;left:2px;width:26px;height:24px;border-radius:999px;background:var(--grad);transition:transform .18s}
#theme[aria-checked=true]::before{transform:translateX(28px)}
#theme svg{position:relative;width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;color:var(--mut)}
#theme[aria-checked=false] .sun,#theme[aria-checked=true] .moon{color:#1A0F00}
html[lang="si"] body{font-family:"Noto Sans Sinhala","Iskoola Pota","Nirmala UI",system-ui,sans-serif;line-height:1.75}
html[lang="ta"] body{font-family:"Noto Sans Tamil","Latha","Nirmala UI",system-ui,sans-serif;line-height:1.75}
html[lang="si"] h1,html[lang="ta"] h1{font-size:clamp(1.8rem,4.4vw,2.8rem);line-height:1.35}

/* reference tables */
table{width:100%;border-collapse:collapse;margin:8px 0 18px;font-size:.96rem}
th,td{text-align:left;padding:12px 10px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-weight:600;width:38%}
td{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.92rem}

/* faq */
details.faq{border-bottom:1px solid var(--line);padding:18px 0}
details.faq summary{cursor:pointer;list-style:none;font-weight:600;font-size:1.03rem;display:flex;align-items:center;gap:16px}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"+";margin-left:auto;color:var(--orange-t);font-size:1.4rem;font-weight:400;line-height:1}
details.faq[open] summary::after{content:"\2212"}
details.faq p{margin:12px 0 0}
details.faq ul,details.faq ol,details.faq pre{margin:12px 0 0}
details.faq ul,details.faq ol{padding-left:22px}
li{color:var(--mut);margin:0 0 .35em}
h3{font-size:1.1rem;font-weight:650;margin:0 0 .4em;line-height:1.3}
code,pre{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.9rem}
code{background:var(--tint);border:1px solid var(--line);border-radius:6px;padding:1px 5px;color:var(--ink);overflow-wrap:anywhere}
pre{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 16px;overflow-x:auto;color:var(--ink);line-height:1.5}
pre code{background:none;border:0;padding:0;overflow-wrap:normal}

/* guides */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin-top:8px}
.card{display:block;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:20px 22px}
.card:hover,.card:focus-visible{border-color:var(--orange-t)}
.card p{margin:0;font-size:.95rem}
.toc{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px}
.toc a{border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:.9rem;font-weight:600;background:var(--tint)}
.toc a:hover,.toc a:focus-visible{border-color:var(--orange-t)}
a.eyebrow:hover{text-decoration:underline;text-underline-offset:3px}
.guide section{padding:clamp(28px,4vw,48px) 0}
.guide section+section{border-top:1px solid var(--line)}
footer p a{color:var(--orange-t);text-decoration:underline;text-underline-offset:3px}

.final{background:linear-gradient(135deg,rgba(141,21,58,.35),rgba(255,122,24,.14));border:1px solid var(--line);border-radius:26px;padding:clamp(30px,5vw,56px);text-align:center}
.final .lead{margin-inline:auto}
footer{border-top:1px solid var(--line);padding:30px 0 40px;font-size:.88rem}
@media(max-width:600px){
  .logo em{display:none}
  #lang a{padding:6px 10px;font-size:.78rem}
  th{width:auto}
}