/* Coin theme system.
   Appearance: html[data-appearance] = system | light | dark   (color-scheme drives light-dark())
   Palette:    html[data-palette]    = ocean | forest | sunset | violet | slate                    */

html { color-scheme: light dark; }
html[data-appearance="light"] { color-scheme: light; }
html[data-appearance="dark"] { color-scheme: dark; }

:root {
  --bg: light-dark(#f5f7fb, #0c111b);
  --surface: light-dark(#ffffff, #151c2b);
  --surface-2: light-dark(#eef2f8, #1d2638);
  --text: light-dark(#18202e, #e6ebf5);
  --muted: light-dark(#5b6678, #9aa6bb);
  --border: light-dark(#d8dfeb, #2a3550);
  --good: light-dark(#15803d, #4ade80);
  --bad: light-dark(#b91c1c, #f87171);
  --warn: light-dark(#a16207, #fbbf24);
  --on-accent: light-dark(#ffffff, #0c111b);
  --accent: light-dark(#1f6feb, #58a6ff);
  --radius: 10px;
  --shadow: 0 1px 2px rgb(0 0 0 / 0.08);
}
html[data-palette="forest"] { --accent: light-dark(#15803d, #4ade80); }
html[data-palette="sunset"] { --accent: light-dark(#c2410c, #fb923c); }
html[data-palette="violet"] { --accent: light-dark(#6d28d9, #a78bfa); }
html[data-palette="slate"]  { --accent: light-dark(#334155, #94a3b8); }

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); }
h1 { font-size: 1.6rem; margin: 0.2em 0 0.4em; }
h2 { font-size: 1.15rem; margin: 0 0 0.6em; }
hr { border: 0; border-top: 1px solid var(--border); margin: 1em 0; }
code { background: var(--surface-2); padding: 0.1em 0.35em; border-radius: 4px; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.pos { color: var(--good); }
.neg { color: var(--bad); }
.inline { display: inline; }

/* layout */
.topbar { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; padding: 0.6rem 1.2rem; background: var(--surface); border-bottom: 1px solid var(--border); }
.brand { font-weight: 700; font-size: 1.1rem; text-decoration: none; color: var(--accent); }
.topbar nav { display: flex; gap: 0.2rem; flex-wrap: wrap; }
.topbar nav a { padding: 0.35rem 0.7rem; border-radius: 8px; text-decoration: none; color: var(--text); }
.topbar nav a:hover { background: var(--surface-2); }
.topbar nav a[aria-current="page"] { background: var(--accent); color: var(--on-accent); }
.topbar-right { margin-left: auto; display: flex; gap: 0.6rem; align-items: center; flex-wrap: wrap; }
.container { max-width: 1100px; margin: 0 auto; padding: 1.2rem; }
.footer { text-align: center; color: var(--muted); font-size: 0.8rem; padding: 1.5rem 1rem 2rem; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem 1.2rem; margin-bottom: 1rem; box-shadow: var(--shadow); }
.card.narrow { max-width: 460px; margin: 2rem auto; }
.two-col { display: grid; grid-template-columns: 1fr 1.6fr; gap: 1rem; }
.two-col > .card { margin-bottom: 1rem; }
.row-between { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; }
.status-bar { display: flex; gap: 1.4rem; align-items: center; flex-wrap: wrap; }
.status-bar .label, .stat .label { display: block; color: var(--muted); font-size: 0.8rem; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 1rem; margin-bottom: 1rem; }
.stat { margin: 0; }
.big { font-size: 1.5rem; font-weight: 650; display: block; }
.sub { font-size: 0.9rem; }

/* flash */
.flash { padding: 0.7rem 1rem; border-radius: var(--radius); margin-bottom: 1rem; border: 1px solid var(--border); background: var(--surface); }
.flash.success { border-color: var(--good); }
.flash.error { border-color: var(--bad); color: var(--bad); }

/* forms */
label { display: block; margin-bottom: 0.9rem; font-weight: 500; }
input[type=text], input[type=email], input[type=password], input[type=number], select {
  display: block; width: 100%; margin-top: 0.25rem; padding: 0.55rem 0.7rem; font: inherit; color: var(--text);
  background: var(--surface); border: 1px solid var(--border); border-radius: 8px; }
input:focus-visible, select:focus-visible, button:focus-visible, a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn { display: inline-block; padding: 0.55rem 1rem; font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; border-radius: 8px;
  color: var(--text); background: var(--surface-2); border: 1px solid var(--border); }
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }
.btn.danger { background: var(--bad); color: var(--on-accent); border-color: var(--bad); }
.btn.ghost { background: transparent; }
.btn.small { padding: 0.3rem 0.7rem; font-size: 0.85rem; }
.check { font-weight: 400; font-size: 0.9rem; margin: 0.3rem 0 0; }
.theme-form { display: flex; gap: 0.6rem; align-items: end; flex-wrap: wrap; }
.theme-form label { margin: 0; }
.theme-form select { width: auto; margin: 0; }
.theme-form.compact select { padding: 0.3rem 0.5rem; font-size: 0.85rem; }
.choices { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 0.7rem; margin-bottom: 1rem; }
.choice { display: flex; gap: 0.6rem; align-items: flex-start; margin: 0; padding: 0.7rem; border: 1px solid var(--border); border-radius: 8px; cursor: pointer; font-weight: 400; }
.choice:has(input:checked) { border-color: var(--accent); background: var(--surface-2); }
.choice.disabled { opacity: 0.55; cursor: not-allowed; }
.alloc-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 0.8rem; }
.pct-input { display: flex; align-items: center; gap: 0.3rem; }
.alloc-total.bad strong { color: var(--bad); }
.alloc-total.ok strong { color: var(--good); }
.steps { padding-left: 1.2rem; }
.qr { display: inline-block; background: #fff; padding: 0.5rem; border-radius: 8px; margin: 0.6rem 0; }
.secret { word-break: break-all; font-size: 1rem; }

/* tables */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
th, td { padding: 0.45rem 0.6rem; text-align: left; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { color: var(--muted); font-weight: 600; font-size: 0.8rem; }
td.reason { white-space: normal; min-width: 220px; color: var(--muted); }
.num { text-align: right; }
table.compare td.current, table.compare th.current { background: var(--surface-2); font-weight: 650; }
.pager { display: flex; gap: 1rem; align-items: center; justify-content: center; margin-top: 1rem; }

/* badges, chips */
.badge { display: inline-block; padding: 0.1rem 0.6rem; border-radius: 999px; font-size: 0.8rem; font-weight: 600; background: var(--surface-2); border: 1px solid var(--border); }
.badge.paper { border-color: var(--accent); color: var(--accent); }
.badge.paused, .badge.danger, .badge.neg { border-color: var(--bad); color: var(--bad); }
.chip { display: inline-block; margin: 0.15rem 0.2rem 0.15rem 0; padding: 0.05rem 0.55rem; font-size: 0.8rem; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--border); }
.rules li { margin-bottom: 0.5rem; }
.danger-zone { border-color: var(--bad); }
.facts { display: grid; grid-template-columns: max-content 1fr; gap: 0.4rem 1.2rem; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; }
.swatches { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-top: 0.8rem; }
.swatch { display: inline-flex; align-items: center; gap: 0.4rem; font-size: 0.85rem; }
.swatch i { width: 1rem; height: 1rem; border-radius: 50%; background: var(--accent); display: inline-block; }
.swatch[data-palette-preview="ocean"] i { background: light-dark(#1f6feb, #58a6ff); }
.swatch[data-palette-preview="forest"] i { background: light-dark(#15803d, #4ade80); }
.swatch[data-palette-preview="sunset"] i { background: light-dark(#c2410c, #fb923c); }
.swatch[data-palette-preview="violet"] i { background: light-dark(#6d28d9, #a78bfa); }
.swatch[data-palette-preview="slate"] i { background: light-dark(#334155, #94a3b8); }
.glossary dt { font-weight: 650; margin-top: 1rem; scroll-margin-top: 4rem; }
.glossary dd { margin: 0.15rem 0 0; }
.glossary dt:target { color: var(--accent); }

/* chart */
.chart { width: 100%; height: auto; }
.chart .line { fill: none; stroke: var(--accent); stroke-width: 2.2; stroke-linejoin: round; }
.chart .area { fill: var(--accent); opacity: 0.1; }
.chart .grid { stroke: var(--border); stroke-width: 1; }
.chart .baseline { stroke: var(--muted); stroke-dasharray: 5 4; stroke-width: 1; }
.chart .axis { fill: var(--muted); font-size: 11px; }
.chart .dot { fill: var(--accent); opacity: 0; }
.chart .dot:hover { opacity: 1; r: 6; }
.empty-chart { color: var(--muted); padding: 2rem 0; text-align: center; }

/* help bubbles */
.help-wrap { position: relative; display: inline-block; vertical-align: middle; }
.help, .help-demo { display: inline-flex; align-items: center; justify-content: center; width: 1.15rem; height: 1.15rem; margin-left: 0.25rem;
  padding: 0; font: 700 0.72rem/1 system-ui, sans-serif; color: var(--accent); background: transparent; border: 1.5px solid var(--accent); border-radius: 50%; cursor: help; }
.help-demo { cursor: default; margin: 0 0.1rem; }
.help:hover, .help[aria-expanded="true"] { background: var(--accent); color: var(--on-accent); }
.tip, .pop { position: absolute; z-index: 20; left: 50%; transform: translateX(-50%); top: calc(100% + 0.4rem); width: max-content; max-width: min(280px, 80vw);
  padding: 0.5rem 0.7rem; font-size: 0.82rem; font-weight: 400; line-height: 1.4; text-align: left; color: var(--text); background: var(--surface);
  border: 1px solid var(--border); border-radius: 8px; box-shadow: 0 6px 18px rgb(0 0 0 / 0.18); white-space: normal; }
.tip { display: none; pointer-events: none; }
.help:hover + .tip, .help:focus-visible + .tip { display: block; }
.help[aria-expanded="true"] + .tip { display: none; }
.pop { max-width: min(340px, 86vw); }
.pop[hidden] { display: none; }
.pop strong { display: block; margin-bottom: 0.25rem; }
.pop-body { display: block; }
.pop-more { display: block; margin-top: 0.4rem; font-size: 0.78rem; }
.help-missing { display: none; }

@media (max-width: 760px) {
  .two-col { grid-template-columns: 1fr; }
  .container { padding: 0.8rem; }
  .topbar { padding: 0.5rem 0.8rem; }
  .tip, .pop { left: 0; transform: none; }
}
@media (prefers-reduced-motion: no-preference) { .btn, .help { transition: background 0.15s, border-color 0.15s; } }

/* user management */
.grow { flex: 1; }
td.actions { white-space: normal; }
td.actions form.inline { display: inline-block; margin: 0 0.25rem 0.25rem 0; }
.inline-details { display: inline-block; vertical-align: top; }
.inline-details summary { list-style: none; cursor: pointer; display: inline-block; }
.inline-details summary::-webkit-details-marker { display: none; }
.inline-details form { margin-top: 0.4rem; }

/* landing */
.hero { text-align: center; margin: 0.5rem auto 1rem; }
.hero img { width: min(260px, 70vw); height: auto; border-radius: 18px; }
.hero .tagline { margin: 0.4rem 0 0; font-size: 1.4rem; font-weight: 700; letter-spacing: 0.02em; }