:root{
  --bg:#0b1220; --surface:#0f172a; --panel:#0b1529; --muted:#98a4b7; --text:#eaf2ff;
  --brand:#06b6d4; --brand2:#3b82f6; --ok:#10b981; --warn:#f59e0b; --danger:#ef4444;
  --chip:#0c1f3b; --chip-bd:#1e3a8a;
  --radius:18px; --shadow:0 16px 40px rgba(0,0,0,.35);
}
/* Light theme */
:root.light{
  --bg:#f8fafc; --surface:#ffffff; --panel:#ffffff; --muted:#475569; --text:#0f172a;
  --chip:#eef2ff; --chip-bd:#c7d2fe;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,Arial,sans-serif;line-height:1.65}
.container{max-width:1200px;margin:0 auto;padding:0 16px}
/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(11,18,32,.75);backdrop-filter:blur(12px);border-bottom:1px solid #1f2a40}
:root.light .site-header{background:#fff;border-color:#e5e7eb}
.navbar{display:flex;align-items:center;justify-content:space-between;padding:12px 0}
.brand{display:flex;align-items:center;gap:12px}
.brand img{width:36px;height:36px;border-radius:10px;box-shadow:var(--shadow)}
.brand .title{font-weight:900;letter-spacing:.2px}
.brand .sub{color:var(--muted);font-size:12px;margin-top:2px}
.nav{display:flex;gap:8px;flex-wrap:wrap}
.nav a{color:var(--text);text-decoration:none;border:1px solid #27406a;padding:8px 12px;border-radius:12px;background:var(--surface)}
.nav a:hover{filter:brightness(1.1)}
:root.light .nav a{border-color:#e5e7eb}
#navToggle{display:none}
@media (max-width:880px){
  #navToggle{display:inline-flex;align-items:center;justify-content:center;border:1px solid #27406a;color:var(--text);background:transparent;border-radius:12px;padding:8px 12px}
  :root.light #navToggle{border-color:#e5e7eb}
  .nav{display:none}
  .nav.open{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:10px 0 12px}
  .nav.open a{text-align:center}
}
/* Cards */
.section{margin:22px 0}
.card{background:linear-gradient(180deg,rgba(18,28,48,.92),rgba(12,20,36,.92));border:1px solid #1f2a40;border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}
:root.light .card{background:#fff;border:1px solid #e5e7eb}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
@media (max-width:900px){.grid2{grid-template-columns:1fr}}
/* Number chips */
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{display:inline-flex;align-items:center;justify-content:center;min-width:46px;height:46px;padding:0 12px;border-radius:12px;background:var(--chip);border:1px solid var(--chip-bd);font-family:'Roboto Mono',monospace;font-weight:800}
:root.light .chip{background:#eef2ff;border-color:#c7d2fe;color:#1e3a8a}
/* Prediksi labels */
.pred-label{color:var(--muted);font-weight:700;text-transform:uppercase;font-size:12px;letter-spacing:.5px;margin-bottom:6px}
.pred-val{font-family:'Roboto Mono',monospace;font-size:22px;letter-spacing:4px}
/* Footer */
.footer{padding:20px 0;margin-top:28px;border-top:1px solid #1f2a40;color:#a7b4cc}
:root.light .footer{background:#fff;border-color:#e5e7eb;color:#6b7280}
.toggle{border:1px solid #27406a;padding:8px 12px;border-radius:12px;background:transparent;color:var(--text);cursor:pointer}
:root.light .toggle{border-color:#e5e7eb}
.link{color:#8ecbff;text-decoration:none}
:root.light .link{color:#1d4ed8}
.link:hover{text-decoration:underline}
.section h2{margin:0 0 6px}
.small{font-size:12px;color:var(--muted)}

html,body{height:100%;display:flex;flex-direction:column}
main{flex:1 0 auto}
footer.footer{flex-shrink:0}
.article{margin-top:20px;font-size:15px;line-height:1.7}
.article h2{margin-top:22px;margin-bottom:8px;font-size:20px}
.article h3{margin-top:18px;margin-bottom:6px;font-size:17px}
.article p{margin:6px 0}

/* v14 header & home fixes */
.site-header .topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 0}
.brandbox{display:flex;align-items:center;gap:10px;min-width:0}
.brandlogo{width:36px;height:36px;border-radius:10px;overflow:hidden;flex:0 0 auto}
.brandtext{display:flex;flex-direction:column;min-width:0}
.brandtext .title{font-weight:900;white-space:nowrap}
.brandtext .sub{color:var(--muted);font-size:12px;white-space:nowrap}
.controls{display:flex;gap:8px;align-items:center}
.controls .toggle{height:38px}

.navwrap{padding-bottom:8px}
.nav{display:flex;gap:8px;flex-wrap:wrap}
.nav a{display:inline-flex;align-items:center;gap:8px}

.hero{background:var(--panel);border:1px solid #e5e7eb;border-radius:18px;padding:18px}
:root:not(.light) .hero{border-color:#1f2a40}
.cta-list{display:grid;grid-template-columns:1fr;gap:12px}
.cta{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid #e5e7eb;border-radius:14px;padding:12px}
:root:not(.light) .cta{border-color:#1f2a40}
.cta strong{color:var(--text)}
.home-explain{margin-top:18px}
.home-explain .section{margin:12px 0}
.home-explain p{margin:6px 0;color:var(--muted)}

@media(min-width:740px){ .cta-list{grid-template-columns:1fr 1fr} }

/* v16 cleanup */
.site-header{position:sticky;top:0;z-index:50}
.header-gap{height:8px}
.navwrap{padding:6px 0 10px}
.nav{display:flex;gap:8px;flex-wrap:wrap}
.nav a{white-space:nowrap}
main.container{padding-top:8px}
.hero{margin-top:8px}

/* v17: cleaner header + stacked 4D lines */
.site-header .topbar{padding:14px 0}
.brandbox-min{display:flex;flex-direction:column;gap:2px}
.brandbox-min .title{font-weight:900;font-size:18px}
.brandbox-min .sub{color:var(--muted);font-size:12px}

.pred-lines{margin-top:8px;display:grid;grid-template-columns:1fr;row-gap:8px}
.pred-line{font-family:'Roboto Mono',monospace;font-size:26px;letter-spacing:6px;background:var(--surface);
  border:1px solid #e5e7eb;border-radius:12px;padding:10px 12px}
:root:not(.light) .pred-line{border-color:#1f2a40}
.pred-label{margin-top:10px}

/* v18: result meta & history */
.meta-bar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;color:var(--muted);margin-top:8px}
.meta-bar .badge{background:var(--surface);border:1px solid #e5e7eb;border-radius:10px;padding:6px 10px}
:root:not(.light) .meta-bar .badge{border-color:#1f2a40}
.countdown{font-weight:800}
.table-wrap{overflow:auto;border:1px solid #e5e7eb;border-radius:12px;background:var(--surface);margin-top:12px}
:root:not(.light) .table-wrap{border-color:#1f2a40}
table.history{width:100%;border-collapse:collapse}
table.history th, table.history td{padding:10px;border-bottom:1px solid #e5e7eb;text-align:left}
:root:not(.light) table.history th, :root:not(.light) table.history td{border-color:#1f2a40}
table.history th{font-weight:700;color:var(--muted);background:var(--panel)}
/* prediksi list container */
.pred-lines{margin-top:8px;display:grid;grid-template-columns:1fr;row-gap:8px}
.pred-line{font-family:'Roboto Mono',monospace;font-size:26px;letter-spacing:6px;background:var(--surface);border:1px solid #e5e7eb;border-radius:12px;padding:10px 12px}
:root:not(.light) .pred-line{border-color:#1f2a40}

/* v19 visual tweaks */
.result-digits{font-family:'Roboto Mono',monospace;font-weight:900;font-size:64px;letter-spacing:10px}
.meta-bar .badge{font-size:12px;opacity:.9}
/* prediksi list present */
.pred-lines{margin-top:8px;display:grid;grid-template-columns:1fr;row-gap:10px}
.pred-line{font-family:'Roboto Mono',monospace;font-size:28px;letter-spacing:8px;background:var(--surface);
  border:1px solid #e5e7eb;border-radius:12px;padding:12px}
:root:not(.light) .pred-line{border-color:#1f2a40}

/* v20: mobile-first fixes */
@media (max-width: 740px){
  .brandbox-min .title{font-size:16px}
  .brandbox-min .sub{display:none}
  .controls .toggle{height:36px}
}
/* scrollable nav row, avoid wrapping */
.navwrap{padding:8px 0}
.nav{display:block;overflow-x:auto;white-space:nowrap;-webkit-overflow-scrolling:touch}
.nav a{display:inline-block;margin-right:8px;white-space:nowrap}
/* digits row as big chips */
.digits-wrap{display:flex;justify-content:flex-start;gap:10px;flex-wrap:nowrap;margin:6px 0}
.digit-big{display:flex;align-items:center;justify-content:center;
  min-width:56px;height:64px;border-radius:14px;
  background:var(--surface);border:1px solid #e5e7eb;
  font-family:'Roboto Mono',monospace;font-weight:900;
  font-size:clamp(32px, 8vw, 56px);letter-spacing:2px}
:root:not(.light) .digit-big{border-color:#1f2a40}
/* meta smaller on mobile */
.meta-bar .badge{font-size:12px}
/* prediksi lines responsive */
@media (max-width: 480px){
  .pred-line{font-size:22px;letter-spacing:6px}
}
/* card padding tighter on mobile */
@media (max-width: 740px){
  .card{padding:14px}
}