:root {
  --bg: #f5f6f8;
  --card: #fff;
  --text: #15181e;
  --muted: #5b6472;
  --border: #d5d9e0;
  --accent: #1f5eff;
  --danger: #c4261d;
  --good: #1a7f37;
  --high: #b35900;
  --medium: #8a6d00;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1115; --card: #181b21; --text: #eceff4; --muted: #98a2b3; --border: #2b303a; --accent: #6d97ff; --danger: #ff7b72; --good: #3fb950; --high: #ffa657; --medium: #e3b341; }
}
* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100vh; display: grid; place-items: center;
  background: var(--bg); color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.card {
  width: min(380px, calc(100vw - 32px)); padding: 32px;
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
}
h1 { margin: 0 0 20px; font-size: 1.5rem; }
label { display: block; margin: 14px 0 6px; font-size: .875rem; color: var(--muted); }
input {
  width: 100%; padding: 10px 12px; font: inherit; color: inherit;
  background: transparent; border: 1px solid var(--border); border-radius: 8px;
}
input:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
form button {
  width: 100%; margin-top: 20px; padding: 11px; font: inherit; font-weight: 600;
  color: #fff; background: var(--accent); border: 0; border-radius: 8px; cursor: pointer;
}
form button:disabled { opacity: .6; cursor: progress; }
#error { margin: 14px 0 0; color: var(--danger); font-size: .875rem; }
.linkbtn { width: auto; margin: 0; padding: 0; font: inherit; color: var(--accent); background: none; border: 0; cursor: pointer; font-weight: 500; text-decoration: underline; }

/* ---------- dashboard ---------- */
body.dash { display: block; place-items: normal; padding: 24px 16px 40px; }
.dash-head, .grid { max-width: 1040px; margin: 0 auto; }
.dash-head { display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.dash-head h1 { margin: 0; }
.dash-head p { margin: 2px 0 0; font-variant-numeric: tabular-nums; }
.dash-actions { display: flex; align-items: center; gap: 12px; }
.muted { color: var(--muted); }
.small { font-size: .875rem; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); grid-auto-flow: dense; }
.tile { width: auto; padding: 20px; min-width: 0; }
.tile p { margin: 0 0 4px; }
.tile-chart { grid-column: 1 / -1; }
@media (min-width: 940px) { .tile-chart { grid-column: span 2; } }
.label { margin: 0 0 10px; font-size: .75rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.hero { font-size: clamp(2.25rem, 8vw, 3.5rem); font-weight: 650; line-height: 1.1; font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.kv { display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; margin: 0; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; text-align: right; overflow-wrap: anywhere; font-variant-numeric: tabular-nums; }

.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.seg button { padding: 4px 12px; font: inherit; font-size: .875rem; color: var(--muted); background: transparent; border: 0; cursor: pointer; }
.seg button[aria-pressed="true"] { color: #fff; background: var(--accent); }

.spark-wrap { position: relative; }
.spark { display: block; width: 100%; height: 180px; margin-bottom: 8px; touch-action: pan-y; overflow: visible; }
.spark-line { fill: none; stroke: var(--accent); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.spark-area { fill: var(--accent); opacity: .1; }
.spark-axis { stroke: var(--border); stroke-width: 1; }
.spark-cross { stroke: var(--muted); stroke-width: 1; stroke-dasharray: 3 3; }
.spark-dot { fill: var(--accent); stroke: var(--card); stroke-width: 2; }
.spark-label { fill: var(--muted); font-size: 12px; }
.spark-value { fill: var(--text); font-size: 13px; font-weight: 600; }
.tip {
  position: absolute; transform: translate(-50%, calc(-100% - 12px)); pointer-events: none; white-space: nowrap;
  padding: 4px 8px; font-size: .8125rem; background: var(--card); color: var(--text);
  border: 1px solid var(--border); border-radius: 6px; box-shadow: 0 2px 8px rgb(0 0 0 / .12);
}
#clock { font-size: clamp(2rem, 4.2vw, 2.75rem); white-space: nowrap; }

.tile-markets { grid-column: 1 / -1; }
.tile-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 0 12px; }
.tile-head .label { white-space: nowrap; }
.mkt-status { margin: 0; color: var(--muted); }
.mkt-status::before { content: "●"; margin-right: 6px; }
.mkt-status[data-state="live"]::before { color: var(--good); }
.mkt-status[data-state="down"]::before { color: var(--danger); }
.coins { display: grid; gap: 16px 24px; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.coin { min-width: 0; }
.coin + .coin { border-left: 1px solid var(--border); padding-left: 24px; }
.coin-head { margin: 0 0 2px; }
.coin-sym { font-weight: 650; }
.coin-price { display: inline-block; margin: 0 0 0 -4px; padding: 0 4px; font-size: 1.75rem; font-weight: 650; font-variant-numeric: tabular-nums; border-radius: 4px; }
.coin-change { margin: 2px 0 10px; font-variant-numeric: tabular-nums; }
.coin-change[data-dir="up"] { color: var(--good); }
.coin-change[data-dir="down"] { color: var(--danger); }
.tick-up { animation: flash-up .8s ease-out; }
.tick-down { animation: flash-down .8s ease-out; }
@keyframes flash-up { from { background: color-mix(in srgb, var(--good) 22%, transparent); } }
@keyframes flash-down { from { background: color-mix(in srgb, var(--danger) 22%, transparent); } }
@media (prefers-reduced-motion: reduce) { .tick-up, .tick-down { animation: none; } }
.range { position: relative; height: 4px; margin: 6px 4px; background: var(--border); border-radius: 2px; }
.range-dot { position: absolute; top: 50%; left: 50%; width: 10px; height: 10px; transform: translate(-50%, -50%); background: var(--accent); border: 2px solid var(--card); border-radius: 50%; }
.range-labels { display: flex; justify-content: space-between; gap: 8px; margin: 0; font-variant-numeric: tabular-nums; }
@media (max-width: 760px) {
  .coins { grid-template-columns: 1fr; }
  .coin + .coin { border-left: 0; padding-left: 0; border-top: 1px solid var(--border); padding-top: 16px; }
}

.tile-news { grid-column: 1 / -1; }
.tile-news .tile-head p { margin: 0; }
.news { margin: 0; padding: 0; list-style: none; display: grid; gap: 0 32px; grid-template-columns: 1fr; }
@media (min-width: 760px) { .news { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.news li { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding: 9px 0; border-bottom: 1px solid var(--border); }
.news a { color: var(--text); text-decoration: none; }
.news a:hover { color: var(--accent); text-decoration: underline; }
.news a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }
.news-meta { flex: none; white-space: nowrap; font-variant-numeric: tabular-nums; }

.nav { display: inline-flex; gap: 4px; padding: 3px; border: 1px solid var(--border); border-radius: 10px; background: var(--card); }
.nav a { padding: 5px 12px; border-radius: 7px; font-size: .9375rem; font-weight: 500; color: var(--muted); text-decoration: none; }
.nav a:hover { color: var(--text); background: var(--bg); }
.nav a[aria-current="page"] { color: #fff; background: var(--accent); }
.nav a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.dash-actions { flex-wrap: wrap; }

.news-full li { display: grid; grid-template-columns: 1fr auto; align-content: start; gap: 0 12px; padding: 12px 0; }
.news-full a { font-weight: 600; }
.news-full .news-meta { grid-column: 2; grid-row: 1; }
.news-full .news-summary { grid-column: 1 / -1; margin: 6px 0 0; font-size: .9375rem; }
@media (max-width: 420px) {
  .dash-actions { gap: 8px; }
  .nav a { padding: 5px 10px; }
  .seg button { padding: 4px 9px; }
}
@media (max-width: 420px) {
  .nav { flex: 1 0 100%; max-width: 100%; overflow-x: auto; }
  .nav a { flex: 1; padding: 5px 6px; font-size: .875rem; text-align: center; white-space: nowrap; }
}
@media (max-width: 600px) {
  .news-full li { grid-template-columns: 1fr; }
  .news-full .news-meta { grid-column: 1; grid-row: 2; margin-top: 2px; }
  .news-full .news-summary { grid-row: 3; }
}

/* ---------- PoCs ---------- */
.poc-warn { margin: 8px 0 4px; padding: 8px 12px; color: var(--text); background: color-mix(in srgb, var(--high) 12%, transparent); border: 1px solid color-mix(in srgb, var(--high) 35%, transparent); border-radius: 8px; }
.pocs { margin: 0; padding: 0; list-style: none; display: grid; gap: 0 32px; grid-template-columns: 1fr; }
@media (min-width: 900px) { .pocs { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.poc { padding: 14px 0; border-bottom: 1px solid var(--border); min-width: 0; }
.poc-head { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 10px; }
.poc-id { font-weight: 650; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; color: var(--text); text-decoration: none; }
.poc-id:hover { color: var(--accent); text-decoration: underline; }
.sev { padding: 1px 8px; font-size: .8125rem; font-weight: 600; border-radius: 999px; color: var(--muted); border: 1px solid var(--border); font-variant-numeric: tabular-nums; }
.sev[data-sev="critical"] { color: var(--danger); background: color-mix(in srgb, var(--danger) 12%, transparent); border-color: color-mix(in srgb, var(--danger) 40%, transparent); }
.sev[data-sev="high"] { color: var(--high); background: color-mix(in srgb, var(--high) 12%, transparent); border-color: color-mix(in srgb, var(--high) 40%, transparent); }
.sev[data-sev="medium"] { color: var(--medium); background: color-mix(in srgb, var(--medium) 12%, transparent); border-color: color-mix(in srgb, var(--medium) 40%, transparent); }
.tile p.poc-desc { margin: 6px 0 8px; font-size: .9375rem; }
.poc-repos { margin: 0; padding: 0; list-style: none; }
.poc-repos li { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; padding: 2px 0; min-width: 0; }
.poc-repo { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .875rem; color: var(--accent); }
.poc-repos .muted { flex: none; white-space: nowrap; font-variant-numeric: tabular-nums; }
.poc-repos a { color: var(--accent); }