/* A++ — Institucional Dark (Linear/Vercel energy)
   Tokens from variant-a-plus-plus.jsx */

:root {
  --bg: #09090b;
  --bgElev: #0f0f11;
  --bgSunk: #16161a;
  --bgCard: #111114;
  --fg: #f4f4f5;
  --fgMuted: #a1a1aa;
  --fgSubtle: #71717a;
  --fgDim: #3f3f46;
  --border: #1e1e22;
  --borderBright: #2a2a30;
  --brand: #7c8eff;
  --brandSoft: rgba(124,142,255,0.12);
  --green: #4ade80;
  --greenSoft: rgba(74,222,128,0.12);
  --orange: #fb923c;
  --font: "Geist", -apple-system, BlinkMacSystemFont, "Inter", "Helvetica Neue", sans-serif;
  --mono: "Geist Mono", ui-monospace, "JetBrains Mono", "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { background: var(--bg); color: var(--fg); overflow-x: hidden; }
body { font-family: var(--font); font-size: 14px; line-height: 1.55; -webkit-font-smoothing: antialiased; letter-spacing: -0.005em; }
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; letter-spacing: 0; }
.tab { font-variant-numeric: tabular-nums; }

/* Shared header (matches B++ pattern across all pages) */
.top { position: sticky; top: 0; z-index: 40; background: var(--bg); border-bottom: 1px solid var(--border); }
.topInner { padding: 11px 28px; display: flex; align-items: center; justify-content: space-between; font-size: 11.5px; }
.lockup { display: flex; align-items: center; gap: 10px; }
.lockup-text { display: flex; align-items: baseline; gap: 6px; font-weight: 600; letter-spacing: -0.01em; font-size: 14px; color: #f4f5f7; }
.lockup-text .duppla { color: rgba(244,245,247,0.55); font-weight: 500; }
.nav { display: flex; gap: 20px; font-family: var(--font); font-size: 13px; margin-left: 24px; }
.nav a { color: var(--fgMuted); text-decoration: none; }
.nav a:hover { color: var(--fg); }
.nav a.active { color: var(--fg); }
.dot { width: 6px; height: 6px; border-radius: 50%; background: var(--green); display: inline-block; margin-right: 7px; box-shadow: 0 0 0 3px var(--greenSoft); }
.top-right { display: flex; gap: 18px; align-items: center; color: var(--fgMuted); }
.top-right .sub { color: var(--fgSubtle); }

.container { max-width: 1120px; margin: 0 auto; padding: 0 40px; position: relative; }
.eyebrow { font-size: 12px; font-weight: 500; color: var(--brand); letter-spacing: 0.01em; margin-bottom: 18px; display: inline-flex; align-items: center; gap: 8px; }
.eyebrow::before { content: ''; width: 5px; height: 5px; border-radius: 50%; background: var(--brand); box-shadow: 0 0 0 3px var(--brandSoft); }
.h1 { font-size: 56px; line-height: 1.02; font-weight: 500; letter-spacing: -0.03em; margin: 0 0 22px; max-width: 820px; }
.h1 em { font-style: normal; color: var(--fgMuted); }
.h2 { font-size: 34px; line-height: 1.12; font-weight: 500; letter-spacing: -0.022em; margin: 0 0 14px; }
.h3 { font-size: 17px; font-weight: 600; letter-spacing: -0.01em; margin: 0 0 8px; }
.lede { font-size: 18px; line-height: 1.55; color: var(--fgMuted); max-width: 660px; margin: 0 0 32px; font-weight: 400; }

.btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 16px; border-radius: 8px; font-size: 13.5px; font-weight: 500; cursor: pointer; font-family: inherit; border: 1px solid transparent; transition: all .12s; text-decoration: none; }
.btnPrimary { background: var(--fg); color: var(--bg); }
.btnPrimary:hover { background: #fff; box-shadow: 0 0 0 4px rgba(244,244,245,0.08); }
.btnGhost { background: var(--bgCard); color: var(--fg); border-color: var(--border); }
.btnGhost:hover { background: var(--bgSunk); border-color: var(--borderBright); }

.bgGlow { position: relative; }
.bgGlow::before { content: ''; position: absolute; top: -120px; left: 50%; transform: translateX(-50%); width: 900px; height: 520px; background: radial-gradient(ellipse at center, var(--brandSoft), transparent 65%); pointer-events: none; opacity: 0.55; }

.section { padding: 88px 0; }
.sectionDiv { border-top: 1px solid var(--border); }

.statGrid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
.stat { background: var(--bgElev); padding: 22px 22px 24px; display: flex; flex-direction: column; gap: 6px; }
.statLabel { font-size: 11.5px; color: var(--fgSubtle); font-weight: 500; letter-spacing: 0.01em; }
.statValue { font-size: 24px; font-weight: 500; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; line-height: 1.15; }
.statSub { font-size: 12px; color: var(--fgMuted); margin-top: 4px; }

.stepGrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.stepCard { border: 1px solid var(--border); border-radius: 12px; padding: 24px; background: var(--bgElev); transition: border-color .12s; }
.stepCard:hover { border-color: var(--borderBright); }
.stepNum { font-family: var(--mono); font-size: 11px; color: var(--brand); margin-bottom: 10px; letter-spacing: 0.04em; }
.stepTitle { font-size: 16px; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 6px; }
.stepBody { font-size: 13.5px; color: var(--fgMuted); line-height: 1.55; }

.prose p { font-size: 15px; line-height: 1.72; color: var(--fgMuted); margin: 0 0 16px; max-width: 660px; }
.prose strong { color: var(--fg); font-weight: 500; }

.badge { display: inline-flex; align-items: center; gap: 5px; padding: 3px 9px 3px 7px; border-radius: 999px; font-size: 11.5px; font-weight: 500; letter-spacing: 0.01em; }
.badgeGreen { background: var(--greenSoft); color: var(--green); }
.badgeOrange { background: rgba(255,144,96,0.12); color: var(--orange); }
.badgeDot { width: 5px; height: 5px; border-radius: 50%; background: currentColor; }

.gateWrap { border: 1px solid var(--border); border-radius: 12px; background: var(--bgElev); overflow: hidden; }
.gate { display: flex; align-items: center; gap: 11px; padding: 14px 18px; border-bottom: 1px solid var(--border); font-size: 13.5px; }
.gate:last-child { border-bottom: none; }
.gateDone { color: var(--green); }
.gatePending { color: var(--orange); }
.gateText { color: var(--fg); flex: 1; }
.gateStatus { font-size: 11.5px; color: var(--fgSubtle); }

.tableWrap { border: 1px solid var(--border); border-radius: 12px; overflow: hidden; background: var(--bgElev); }
.tbl { width: 100%; border-collapse: collapse; font-size: 13px; }
.tbl th { text-align: left; padding: 11px 14px; font-weight: 500; font-size: 11.5px; color: var(--fgSubtle); letter-spacing: 0.02em; border-bottom: 1px solid var(--border); background: var(--bgSunk); }
.tbl td { padding: 13px 14px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.rowClick { cursor: pointer; }
.rowClick:hover { background: var(--bgSunk); }
.rowOpen { background: var(--bgSunk); }
.expInner { padding: 18px 24px 24px; background: var(--bgSunk); border-bottom: 1px solid var(--border); }
.link { color: var(--brand); text-decoration: none; font-weight: 500; }
.link:hover { text-decoration: underline; text-underline-offset: 2px; }

.subTable { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.subTable th { text-align: left; padding: 8px 12px; font-size: 10.5px; font-weight: 500; color: var(--fgSubtle); letter-spacing: 0.02em; border-bottom: 1px solid var(--border); }
.subTable td { padding: 10px 12px; border-bottom: 1px solid var(--border); }
.subTable tr:last-child td { border-bottom: none; }

.flowViz { position: relative; margin: 40px 0 8px; border: 1px solid var(--border); border-radius: 14px; background: radial-gradient(ellipse at top, var(--brandSoft) 0%, transparent 62%), var(--bgElev); padding: 24px; overflow: hidden; height: 260px; }
.flowStage { font-family: var(--mono); font-size: 10.5px; color: var(--fgSubtle); position: absolute; letter-spacing: 0.08em; text-transform: uppercase; }

.chip { display: inline-flex; align-items: center; gap: 6px; padding: 4px 9px; background: var(--bgCard); border: 1px solid var(--border); border-radius: 6px; font-size: 12px; font-family: var(--mono); color: var(--fg); cursor: pointer; transition: all .12s; border-style: solid; }
.chip:hover { background: var(--bgSunk); border-color: var(--borderBright); }

/* Shell (two-column table + side panel) */
.shell { display: grid; grid-template-columns: 1.4fr 1fr; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; background: var(--bgElev); min-height: 420px; }
.shellLeft { border-right: 1px solid var(--border); display: flex; flex-direction: column; }
.shellRight { display: flex; flex-direction: column; }
.shellHead { display: flex; align-items: center; justify-content: space-between; padding: 12px 16px; border-bottom: 1px solid var(--border); background: var(--bgSunk); }
.shellTitle { font-size: 12px; font-weight: 500; color: var(--fgMuted); letter-spacing: 0.01em; }
.shellLeft .tableWrap { flex: 1; overflow-y: auto; }

.sideBody { padding: 16px; overflow-y: auto; flex: 1; }
.sideSection { margin-bottom: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.sideSection:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.sideMeta { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; font-size: 13px; }
.sideMeta div { display: flex; flex-direction: column; gap: 2px; }
.sideLabel { font-size: 10.5px; color: var(--fgSubtle); text-transform: uppercase; letter-spacing: 0.04em; font-weight: 500; }
.sideAssets { display: flex; flex-direction: column; gap: 4px; }
.sideAsset { display: flex; justify-content: space-between; align-items: center; padding: 6px 8px; border-radius: 6px; border: 1px solid var(--border); background: var(--bgCard); }

/* Verify box */
.verifyBox { border: 1px solid var(--border); border-radius: 12px; background: var(--bgElev); overflow: hidden; }
.verifyBoxInner { padding: 24px; }
.selectInput { background: var(--bgCard); color: var(--fg); border: 1px solid var(--border); border-radius: 8px; padding: 9px 14px; font-family: var(--font); font-size: 13.5px; cursor: pointer; min-width: 200px; }
.selectInput:focus { outline: none; border-color: var(--brand); }

.verifyResult { border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.verifyMatch { border-color: rgba(74,222,128,0.3); }
.verifyFail { border-color: rgba(251,146,60,0.3); }
.verifyResultHead { display: flex; align-items: center; gap: 10px; padding: 12px 16px; background: var(--bgSunk); border-bottom: 1px solid var(--border); font-size: 14px; }
.verifyResultBody { padding: 16px; font-size: 13.5px; color: var(--fgMuted); line-height: 1.55; }
.verifyHashes { display: flex; flex-direction: column; gap: 6px; margin-top: 10px; }
.verifyHashes div { display: flex; align-items: center; gap: 10px; }

.footer { border-top: 1px solid var(--border); padding: 28px 0; margin-top: 48px; color: var(--fgSubtle); font-size: 12.5px; display: flex; justify-content: space-between; }

/* ─── Mobile ─── */
@media (max-width: 768px) {
  .topInner { padding: 10px 16px; flex-wrap: wrap; gap: 8px; }
  .top-right { display: none; }
  .nav { margin-left: 16px; gap: 14px; font-size: 12px; }
  .container { padding: 0 18px; }
  .section { padding: 56px 0; }
  .h1 { font-size: 32px; letter-spacing: -0.02em; }
  .h2 { font-size: 24px; }
  .lede { font-size: 15px; }
  .statGrid { grid-template-columns: repeat(2, 1fr); }
  .stepGrid { grid-template-columns: 1fr; }
  .shell { grid-template-columns: 1fr; min-height: auto; }
  .shellLeft { border-right: none; border-bottom: 1px solid var(--border); }
  .shellLeft .tableWrap { max-height: 320px; overflow-x: auto; }
  .tbl th, .tbl td { padding: 10px 10px; font-size: 12px; white-space: nowrap; }
  .tbl .col-num, .tbl .col-root, .tbl .col-tx { display: none; }
  .flowViz { display: none; }
  .verifyBoxInner { padding: 16px; }
  .verifyBoxInner > div:first-child { flex-direction: column; align-items: stretch; }
  .selectInput { min-width: unset; width: 100%; }
  .footer { flex-direction: column; gap: 8px; text-align: center; }
  .bgGlow::before { width: 400px; height: 280px; }
}