/* ============ DooetCalc · dark neumorphic design system ============ */
:root{
  --bg:#0F172A;
  --text:#F1F5F9;
  --muted:#94A3B8;
  --faint:#64748B;
  --indigo:#818CF8;
  --btn:#4F46E5;
  --emerald:#34D399;
  --rose:#F87171;
  --amber:#FBBF24;
  --sd:#060A12;
  --sl:#182442;
  --r-sm:12px;
  --r-md:16px;
  --r-pill:999px;
  color-scheme:dark;
}
*{box-sizing:border-box;margin:0;padding:0;border:none;-webkit-tap-highlight-color:transparent}
html{scroll-behavior:smooth}
body{
  font-family:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:15px;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
.container{max-width:1180px;margin:0 auto;padding:0 16px}
a{color:var(--indigo);text-decoration:none;transition:color .15s ease}
a:hover{color:var(--text)}

/* ---------- Focus: subtle indigo ring, replaces default blue outline/tap box ---------- */
a:focus-visible,button:focus-visible,.btn:focus-visible,
.faq summary:focus-visible,.pills button:focus-visible,
.calc-link:focus-visible,.brand:focus-visible{
  outline:2px solid rgba(129,140,248,.55);
  outline-offset:3px;
}
.calc-link:focus-visible{border-radius:var(--r-md)}
.search:focus-within{
  box-shadow:inset 5px 5px 10px var(--sd), inset -5px -5px 10px var(--sl), 0 0 0 2px rgba(129,140,248,.35);
}
h1,h2,h3,h4{font-weight:600;line-height:1.4;letter-spacing:-.01em}
.num,.result-big,.result-row .v,.kv .v{font-variant-numeric:tabular-nums}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:var(--bg)}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:60px}
.brand{font-weight:600;font-size:17px;color:var(--text);display:flex;align-items:center;gap:10px}
.brand:hover{color:var(--text);text-decoration:none}
.brand-mark{
  width:22px;height:22px;border-radius:7px;flex-shrink:0;
  background:linear-gradient(135deg,#4F46E5,#818CF8);
  box-shadow:2px 2px 5px var(--sd), -2px -2px 5px var(--sl);
}
.brand .dooet{color:var(--indigo)}
.nav-links{display:flex;gap:20px;font-size:14px;font-weight:500}
.nav-links a{color:var(--muted)}
.nav-links a:hover{color:var(--indigo);text-decoration:none}

/* ---------- Hero ---------- */
.hero{
  text-align:center;
  padding:64px 0 48px;
  background:radial-gradient(640px 320px at 50% -60px, rgba(79,70,229,.28), transparent 70%);
}
.hero h1{font-size:24px;margin-bottom:12px;max-width:640px;margin-left:auto;margin-right:auto}
.hero p{color:var(--muted);max-width:620px;margin:0 auto 26px}

/* ---------- Inset search ---------- */
.search{
  display:flex;align-items:center;gap:10px;
  max-width:520px;margin:0 auto;
  background:var(--bg);
  border-radius:var(--r-sm);
  box-shadow:inset 5px 5px 10px var(--sd), inset -5px -5px 10px var(--sl);
  padding:0 16px;height:48px;
}
.search .ico{color:var(--faint);display:flex;align-items:center}
.search .ico svg{width:16px;height:16px}
.search input{
  flex:1;background:transparent;border:none;outline:none;
  color:var(--text);font:inherit;font-size:15px;height:100%;
}
.search input::placeholder{color:var(--faint)}

/* ---------- Sections & cards ---------- */
.section{padding:40px 0}
.section h2{font-size:19px;margin-bottom:6px}
.sub{color:var(--muted);font-size:14px;margin-bottom:22px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:18px}
.neu{
  background:var(--bg);
  border-radius:var(--r-md);
  box-shadow:5px 5px 10px var(--sd), -5px -5px 10px var(--sl);
}
.calc-link{
  display:block;padding:22px 20px;color:var(--text);
  transition:transform .18s ease, box-shadow .18s ease;
}
.calc-link:hover{text-decoration:none;transform:translateY(-3px)}
.calc-link h3{font-size:16px;margin-bottom:6px;transition:color .15s ease}
.calc-link:hover h3{color:var(--indigo)}
.calc-link p{font-size:13.5px;color:var(--muted);line-height:1.55}
.empty{color:var(--faint);text-align:center;padding:32px 0;display:none}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  height:42px;padding:0 26px;
  background:var(--btn);color:#fff;font:inherit;font-weight:600;font-size:15px;
  border-radius:var(--r-sm);cursor:pointer;
  box-shadow:4px 4px 8px var(--sd), -4px -4px 8px var(--sl);
  transition:transform .12s ease, box-shadow .12s ease, filter .15s ease;
}
.btn:hover{color:#fff;text-decoration:none;filter:brightness(1.08)}
.btn:active{transform:scale(.97);box-shadow:inset 3px 3px 6px rgba(0,0,0,.35)}

/* ---------- Breadcrumb ---------- */
.breadcrumb{font-size:13px;color:var(--faint);margin:24px 0 10px}
.breadcrumb a{color:var(--faint)}
.breadcrumb a:hover{color:var(--indigo)}

/* ---------- Calculator page ---------- */
.page-title{font-size:22px;margin-bottom:8px}
.lede{color:var(--muted);margin-bottom:26px;max-width:760px;font-size:14.5px}
.calc-box{padding:26px 22px;margin-bottom:34px}
.calc-box h2{font-size:17px;margin-bottom:18px}
.form-grid{display:grid;grid-template-columns:1fr;gap:16px}
@media(min-width:680px){.form-grid.two{grid-template-columns:1fr 1fr}}
.field label{display:block;font-weight:500;font-size:13px;color:var(--faint);margin-bottom:8px}
.field input,.field select{
  width:100%;height:46px;padding:0 14px;
  background:var(--bg);color:var(--text);
  border-radius:var(--r-sm);font:inherit;font-size:15px;
  box-shadow:inset 4px 4px 8px var(--sd), inset -4px -4px 8px var(--sl);
  outline:none;
  transition:box-shadow .15s ease;
}
.field input:focus,.field select:focus{
  box-shadow:inset 4px 4px 8px var(--sd), inset -4px -4px 8px var(--sl), 0 0 0 2px rgba(129,140,248,.35);
}
.field select option{background:#1a2440}
.field .hint{font-size:12px;color:var(--faint);margin-top:6px}
.input-wrap{position:relative}
.input-wrap .prefix{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--faint);font-weight:600;font-size:14px;pointer-events:none}
.input-wrap input{padding-left:46px}
.input-wrap .suffix{position:absolute;right:14px;top:50%;transform:translateY(-50%);color:var(--faint);font-weight:600;font-size:14px;pointer-events:none}
.input-wrap input.has-suffix{padding-right:46px}
input[type=number]::-webkit-inner-spin-button{opacity:.3}

/* ---------- Results ---------- */
.results{margin-top:22px;padding:22px 20px}
.results h3{font-size:15px;margin-bottom:14px;color:var(--muted);font-weight:500}
.result-main{text-align:center;padding:6px 0 18px}
.result-main .label{font-size:12px;color:var(--faint);font-weight:500;text-transform:uppercase;letter-spacing:.8px;margin-bottom:6px}
.result-main .value{font-size:32px;font-weight:600;color:var(--emerald);line-height:1.25}
.result-main .value.indigo{color:var(--indigo)}
.result-main .value.amber{color:var(--amber)}
.result-rows{display:grid;gap:2px}
.result-row,.kv{
  display:flex;justify-content:space-between;align-items:center;gap:14px;
  padding:11px 2px;font-size:14px;
  box-shadow:0 1px 0 var(--sl);
}
.result-row .k,.kv .k{color:var(--muted)}
.result-row .v,.kv .v{font-weight:600;text-align:right}
.v.good{color:var(--emerald)}
.v.bad{color:var(--rose)}
.v.warn{color:var(--amber)}
.warning{
  margin-top:14px;padding:14px 16px;border-radius:var(--r-sm);
  background:var(--bg);
  box-shadow:inset 3px 3px 6px var(--sd), inset -3px -3px 6px var(--sl);
  color:var(--rose);font-size:13.5px;
}
.note{font-size:12.5px;color:var(--faint);margin-top:14px}

/* ---------- Article ---------- */
.prose{margin-bottom:36px;max-width:780px}
.prose h2{font-size:18px;margin:30px 0 12px}
.prose h3{font-size:16px;margin:24px 0 10px}
.prose p{margin-bottom:14px;color:#dbe4ee}
.prose ul,.prose ol{margin:0 0 16px 22px;color:#dbe4ee}
.prose li{margin-bottom:7px}
.prose strong{color:var(--text)}
.prose table{width:100%;border-collapse:collapse;margin:18px 0;font-size:13.5px;display:block;overflow-x:auto}
.prose th,.prose td{padding:10px 14px;text-align:left;white-space:nowrap;box-shadow:0 1px 0 var(--sl)}
.prose th{color:var(--faint);font-weight:500;font-size:12px;text-transform:uppercase;letter-spacing:.6px}
.prose td{color:#dbe4ee}
.prose .example{
  border-radius:var(--r-sm);padding:16px 18px;margin:20px 0;
  background:var(--bg);
  box-shadow:inset 4px 4px 8px var(--sd), inset -4px -4px 8px var(--sl);
}
.prose .example strong{display:block;margin-bottom:8px;color:var(--amber)}
.prose .example p{margin-bottom:8px;font-size:14px}
.prose em{color:var(--muted)}

/* ---------- FAQ ---------- */
.faq{margin-bottom:44px;max-width:780px}
.faq h2{font-size:18px;margin-bottom:16px}
.faq details{
  background:var(--bg);border-radius:var(--r-sm);margin-bottom:12px;overflow:hidden;
  box-shadow:4px 4px 8px var(--sd), -4px -4px 8px var(--sl);
}
.faq summary{
  padding:15px 18px;font-weight:500;font-size:14.5px;cursor:pointer;list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:12px;
  transition:color .15s ease;
}
.faq summary:hover{color:var(--indigo)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--indigo);font-weight:600;font-size:18px;flex-shrink:0}
.faq details[open] summary::after{content:"–"}
.faq details .a{padding:0 18px 18px;color:var(--muted);font-size:14px}

/* ---------- Related ---------- */
.related{padding:22px 20px;margin-bottom:44px}
.related h2{font-size:16px;margin-bottom:12px}
.related ul{list-style:none;display:grid;gap:10px}
@media(min-width:680px){.related ul{grid-template-columns:1fr 1fr}}
.related a{font-size:14px}

/* ---------- Footer ---------- */
.site-footer{padding:44px 0 30px;margin-top:24px;font-size:13.5px;color:var(--faint)}
.site-footer .cols{display:grid;gap:28px;margin-bottom:28px}
@media(min-width:680px){.site-footer .cols{grid-template-columns:1.3fr 1fr 1fr}}
.site-footer h4{color:var(--text);margin-bottom:12px;font-size:14px}
.site-footer ul{list-style:none}
.site-footer li{margin-bottom:8px}
.site-footer a{color:var(--muted)}
.site-footer a:hover{color:var(--indigo)}
.site-footer .brand{margin-bottom:4px}
.site-footer .disclaimer{font-size:12px;color:var(--faint);opacity:.85;max-width:760px}

/* ---------- Segmented / pills (untuk tab kalkulator bila perlu) ---------- */
.pills{display:inline-flex;gap:6px;padding:6px;border-radius:var(--r-pill);
  box-shadow:inset 4px 4px 8px var(--sd), inset -4px -4px 8px var(--sl)}
.pills button{
  border:none;background:transparent;color:var(--muted);font:inherit;font-size:13.5px;font-weight:500;
  padding:9px 18px;border-radius:var(--r-pill);cursor:pointer;
  transition:all .18s ease;
}
.pills button.active{
  background:var(--bg);color:var(--text);
  box-shadow:3px 3px 6px var(--sd), -3px -3px 6px var(--sl);
}