:root {
  --bg: #0c0f0d;
  --panel: #121713;
  --line: #232b25;
  --ink: #e8ede9;
  --dim: #8fa096;
  --faint: #5c6b61;
  --charge: #4ade80;
  --discharge: #fbbf24;
  --idle: #2e3a32;
}
* { box-sizing: border-box; margin: 0; }
body {
  background: var(--bg); color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.6; padding: 0 20px 80px;
}
.mono { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; }
main { max-width: 860px; margin: 0 auto; }

nav.tabs {
  max-width: 860px; margin: 0 auto; padding: 18px 0 0;
  display: flex; align-items: baseline; gap: 22px; flex-wrap: wrap;
  font-size: 14px;
}
nav.tabs .brand { font-weight: 700; letter-spacing: -.01em; color: var(--ink); }
nav.tabs .brand .fun { color: var(--charge); }
nav.tabs a { color: var(--dim); text-decoration: none; }
nav.tabs a:hover { color: var(--ink); }
nav.tabs a.active { color: var(--charge); }

header.hero { padding: 46px 0 34px; }
.kicker { font-size: 12px; letter-spacing: .18em; text-transform: uppercase; color: var(--dim); }
h1 { font-size: clamp(32px, 6vw, 50px); letter-spacing: -.02em; line-height: 1.1; margin-top: 10px; }
h1 .fun { color: var(--charge); }
.sub { margin-top: 14px; color: var(--dim); max-width: 58ch; }
.rule-of-thumb { margin-top: 18px; font-size: 13px; color: var(--faint); }
.rule-of-thumb b { color: var(--dim); font-weight: 600; }

section { border: 1px solid var(--line); background: var(--panel); border-radius: 14px; padding: 26px 26px 30px; margin-top: 26px; }
.tool-tag { font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--charge); }
h2 { font-size: 22px; letter-spacing: -.01em; margin-top: 6px; }
.what { color: var(--dim); margin-top: 10px; max-width: 62ch; }

.chart-wrap { margin-top: 28px; }
.chart-title { font-size: 12px; color: var(--faint); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.legend span { display: inline-flex; align-items: center; gap: 6px; margin-left: 14px; }
.dot { width: 9px; height: 9px; border-radius: 2px; display: inline-block; }
#chart { display: flex; align-items: flex-end; gap: 3px; height: 180px; margin-top: 12px; }
#chart .bar { flex: 1; border-radius: 3px 3px 0 0; background: var(--idle); position: relative; min-width: 8px; }
#chart .bar.charge { background: var(--charge); }
#chart .bar.discharge { background: var(--discharge); }
#chart .bar:hover::after {
  content: attr(data-tip); position: absolute; bottom: calc(100% + 8px); left: 50%; transform: translateX(-50%);
  background: #000; color: var(--ink); font-size: 11px; padding: 4px 8px; border-radius: 6px;
  white-space: nowrap; border: 1px solid var(--line); font-family: ui-monospace, Consolas, monospace; z-index: 2;
}
.axis { display: flex; gap: 3px; margin-top: 6px; }
.axis span { flex: 1; font-size: 9px; color: var(--faint); text-align: center; min-width: 8px; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-top: 28px; }
.stat { border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; background: var(--bg); }
.stat .n { font-size: 24px; font-weight: 650; letter-spacing: -.01em; }
.stat .n.green { color: var(--charge); }
.stat .n.amber { color: var(--discharge); }
.stat .l { font-size: 12px; color: var(--faint); margin-top: 4px; }

.honest { margin-top: 26px; border-left: 3px solid var(--discharge); padding: 4px 0 4px 16px; color: var(--dim); font-size: 14px; max-width: 66ch; }
.honest b { color: var(--ink); }

.links { margin-top: 24px; display: flex; gap: 18px; flex-wrap: wrap; font-size: 14px; }
a { color: var(--charge); text-decoration: none; }
a:hover { text-decoration: underline; }

footer { margin-top: 44px; color: var(--faint); font-size: 13px; max-width: 860px; margin-left: auto; margin-right: auto; }
footer a { color: var(--dim); }

/* Kardashev page */
.kbig { font-size: clamp(56px, 12vw, 96px); font-weight: 700; letter-spacing: -.03em; line-height: 1; color: var(--charge); }
.kbig small { font-size: .3em; color: var(--dim); font-weight: 500; letter-spacing: 0; }
.kbar-wrap { margin-top: 26px; }
.kbar-label { display: flex; justify-content: space-between; font-size: 12px; color: var(--faint); }
.kbar { height: 14px; border-radius: 7px; background: var(--idle); overflow: hidden; margin-top: 6px; }
.kbar > div { height: 100%; background: linear-gradient(90deg, var(--charge), var(--discharge)); border-radius: 7px; }
.formula { margin-top: 22px; padding: 14px 18px; background: var(--bg); border: 1px solid var(--line); border-radius: 10px; font-size: 15px; overflow-x: auto; }
.slider-row { margin-top: 26px; }
.slider-row label { font-size: 13px; color: var(--dim); display: block; margin-bottom: 8px; }
.slider-row input[type=range] { width: 100%; accent-color: var(--charge); }
.eta-line { margin-top: 14px; font-size: 15px; }
.eta-line b { color: var(--discharge); font-size: 20px; }
.assumptions { margin-top: 24px; font-size: 13px; color: var(--faint); }
.assumptions li { margin: 6px 0 6px 18px; }

/* Study prose */
.study h3 { font-size: 17px; margin-top: 26px; letter-spacing: -.01em; color: var(--ink); }
.study p { margin-top: 10px; color: var(--dim); font-size: 14.5px; }
.study p b { color: var(--ink); }
.study ol { margin: 14px 0 0 20px; }
.study ol li { margin-top: 12px; color: var(--dim); font-size: 14.5px; }
.study ol li b { color: var(--ink); }
.tbl-wrap { overflow-x: auto; margin-top: 18px; }
table.numbers { border-collapse: collapse; width: 100%; min-width: 720px; font-size: 13px; }
table.numbers th, table.numbers td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.numbers th { font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--faint); }
table.numbers td { color: var(--dim); }
table.numbers td:first-child { color: var(--ink); font-weight: 600; white-space: nowrap; }
details.contested { margin-top: 10px; border: 1px solid var(--line); border-radius: 10px; padding: 12px 16px; }
details.contested summary { cursor: pointer; color: var(--dim); font-size: 13px; font-weight: 600; }
details.contested ul { margin: 8px 0 4px 18px; }
details.contested li { font-size: 13px; color: var(--faint); margin-top: 6px; }

/* Live prices page */
.price-now { font-size: clamp(48px, 10vw, 84px); font-weight: 700; letter-spacing: -.03em; line-height: 1; color: var(--charge); }
.price-now small { font-size: .32em; color: var(--dim); font-weight: 500; letter-spacing: 0; }
.price-meta { margin-top: 10px; font-size: 13px; color: var(--faint); }
.hub-row { margin-top: 18px; display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--dim); }
.hub-row select {
  background: var(--bg); color: var(--ink); border: 1px solid var(--line);
  border-radius: 8px; padding: 6px 10px; font-size: 13px;
}
#chart.dense, .dense { gap: 1px; }
.dense .bar { min-width: 2px; border-radius: 1px 1px 0 0; }
.chart-block { margin-top: 26px; }
.err { margin-top: 20px; border: 1px solid #7f1d1d; background: #1a0f0f; color: #fca5a5; border-radius: 10px; padding: 12px 16px; font-size: 14px; }

/* Kardashev history series */
.kseries { display: flex; align-items: flex-end; gap: 10px; height: 150px; margin-top: 16px; }
.kseries .kcol { flex: 1; display: flex; flex-direction: column; justify-content: flex-end; align-items: center; gap: 6px; height: 100%; }
.kseries .kbarv { width: 100%; max-width: 54px; background: linear-gradient(180deg, var(--charge), var(--idle)); border-radius: 4px 4px 0 0; }
.kseries .kv { font-size: 12px; color: var(--ink); font-weight: 600; }
.kseries .ky { font-size: 10px; color: var(--faint); }

/* Titans page */
.roster { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 16px; margin-top: 24px; }
.titan { border: 1px solid var(--line); border-radius: 12px; background: var(--bg); padding: 18px; }
.titan .era { font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--faint); }
.titan h3 { font-size: 17px; margin-top: 4px; letter-spacing: -.01em; }
.titan ul { list-style: none; margin-top: 10px; }
.titan li { font-size: 13px; color: var(--dim); margin-top: 5px; }
.titan li b { color: var(--ink); font-weight: 600; }
.titan .lesson { margin-top: 12px; font-size: 13px; color: var(--charge); }
.wip { margin-top: 22px; border: 1px dashed var(--line); border-radius: 10px; padding: 14px 18px; color: var(--faint); font-size: 13px; }