:root {
  --bg: #0a0c0f; --surface: #14181d; --surface2: #1c2229; --line: #262d35;
  --text: #f2f5f7; --muted: #8a949e;
  --green: #1ce26a; --yellow: #ffd60a; --red: #ff3b47;
  --strain: #2e9bff; --sleep: #7fb2e5;
  --awake: #e6ebef; --light: #4c6e94; --deep: #2e5bff; --rem: #a78bfa;
  --radius: 22px;
}
* { box-sizing: border-box; }
html { color-scheme: dark; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.45 -apple-system, "Segoe UI", Roboto, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { margin: 0; font-weight: 700; }
.muted { color: var(--muted); }
.error { color: var(--red); min-height: 1.4em; margin: 8px 0 0; }
button {
  font: inherit; font-weight: 600; color: #04120a; background: var(--green); border: 0; border-radius: 999px;
  padding: 8px 16px; cursor: pointer;
}
button.ghost { background: var(--surface2); color: var(--text); font-weight: 500; }
button:disabled { opacity: .45; cursor: default; }
button:focus-visible, input:focus-visible { outline: 2px solid var(--green); outline-offset: 2px; }
input {
  font: inherit; color: var(--text); background: var(--surface2); border: 1px solid var(--line);
  border-radius: 12px; padding: 10px 14px; width: 100%;
}

.top {
  position: sticky; top: 0; z-index: 5; display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
  padding: 12px 28px; background: rgba(10, 12, 15, .92); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line);
}
.brand { font-weight: 800; font-size: 20px; letter-spacing: .4px; }
.logo { color: var(--green); }
.who { color: var(--muted); }
.daynav { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.daynav button { padding: 6px 14px; background: var(--surface2); color: var(--text); font-weight: 500; }
.daynav button:disabled { opacity: .3; }
#daylabel { min-width: 170px; text-align: center; font-weight: 600; }
.status { color: var(--muted); font-size: 13px; }
.top .status { margin-left: auto; }
.daynav:not([hidden]) ~ .status { margin-left: 0; }

main { max-width: 1500px; margin: 0 auto; padding: 24px 28px 60px; }
.card { background: var(--surface); border-radius: var(--radius); padding: 22px; }
.card h3 { font-size: 12px; letter-spacing: 1.4px; text-transform: uppercase; color: var(--muted); font-weight: 600; margin-bottom: 14px; }
.card .sub { color: var(--muted); font-size: 13px; margin: -8px 0 12px; }

.login { max-width: 460px; margin: 12vh auto 0; }
.login h1 { font-size: 32px; margin-bottom: 8px; }
#loginform { display: flex; gap: 10px; margin-top: 16px; }

.alert { border-radius: var(--radius); padding: 16px 22px; margin-bottom: 18px; background: rgba(255, 214, 10, .1); border: 1px solid rgba(255, 214, 10, .35); }
.alert.strong { background: rgba(255, 59, 71, .1); border-color: rgba(255, 59, 71, .4); }
.alert b { display: block; margin-bottom: 4px; }

.hero { display: grid; grid-template-columns: minmax(0, 2.2fr) minmax(280px, 1fr); gap: 18px; margin-bottom: 18px; }
.rings { display: flex; justify-content: space-around; align-items: center; gap: 12px; background: var(--surface); border-radius: var(--radius); padding: 26px 16px; }
.ring { text-align: center; }
.ring svg { width: 100%; max-width: 230px; height: auto; display: block; margin: 0 auto; }
.ring.small svg { max-width: 180px; }
.ring .lbl { margin-top: 8px; font-size: 12px; letter-spacing: 1.4px; text-transform: uppercase; color: var(--muted); font-weight: 600; }
.ring .cap { color: var(--muted); font-size: 13px; }
.ringval { font: 700 54px/1 "Roboto Condensed", "Arial Narrow", system-ui, sans-serif; fill: var(--text); text-anchor: middle; }
.small .ringval { font-size: 42px; }
.ringunit { font-size: 13px; fill: var(--muted); text-anchor: middle; letter-spacing: 1px; }
.plan dl { margin: 0; display: grid; grid-template-columns: 1fr auto; gap: 8px 14px; }
.plan dt { color: var(--muted); }
.plan dd { margin: 0; font-weight: 700; text-align: right; font-variant-numeric: tabular-nums; }
.plan .big { font: 700 40px/1.1 "Roboto Condensed", "Arial Narrow", system-ui, sans-serif; }
.plan hr { border: 0; border-top: 1px solid var(--line); margin: 14px 0; }

.grid { grid-auto-flow: dense; display: grid; grid-template-columns: repeat(auto-fit, minmax(420px, 1fr)); gap: 18px; }
.grid .wide { grid-column: 1 / -1; }
@media (min-width: 1300px) { .grid .span2 { grid-column: span 2; } }

.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
.tile { background: var(--surface2); border-radius: 16px; padding: 14px 16px; }
.tile .k { font-size: 11px; letter-spacing: 1.2px; text-transform: uppercase; color: var(--muted); font-weight: 600; }
.tile .v { font: 700 30px/1.2 "Roboto Condensed", "Arial Narrow", system-ui, sans-serif; }
.tile .v small { font-size: 13px; color: var(--muted); font-weight: 500; margin-left: 3px; }
.tile .d { font-size: 12px; color: var(--muted); }
.d.good { color: var(--green); } .d.bad { color: var(--red); }

svg.chart { width: 100%; height: auto; display: block; overflow: visible; }
.axis { fill: var(--muted); font-size: 11px; }
.gridline { stroke: var(--line); stroke-width: 1; }
.legend { display: flex; flex-wrap: wrap; gap: 6px 16px; margin-top: 10px; color: var(--muted); font-size: 13px; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 6px; vertical-align: -1px; }

.list { display: grid; gap: 12px; }
.row { display: flex; justify-content: space-between; gap: 14px; align-items: baseline; }
.row .l { color: var(--muted); }
.row .r { font-weight: 700; font-variant-numeric: tabular-nums; text-align: right; }
.bar { height: 8px; border-radius: 999px; background: var(--surface2); overflow: hidden; }
.bar > span { display: block; height: 100%; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { background: var(--surface2); border-radius: 999px; padding: 6px 14px; font-size: 14px; }
.chip.on { background: rgba(28, 226, 106, .18); color: var(--green); font-weight: 600; }

.heat { display: grid; grid-auto-flow: column; grid-template-rows: repeat(7, 1fr); grid-auto-columns: minmax(10px, 1fr); gap: 4px; max-width: 460px; }
.heat button { width: 100%; aspect-ratio: 1; padding: 0; border-radius: 6px; background: var(--surface2); }
.heat button.sel { outline: 2px solid var(--text); outline-offset: 1px; }
.heat button.g { background: var(--green); } .heat button.y { background: var(--yellow); } .heat button.r { background: var(--red); }
.heat button.none { background: var(--surface2); }

.range { display: flex; gap: 6px; margin-bottom: 12px; }
.range button { padding: 4px 12px; font-size: 13px; }
.range button:not(.on) { background: var(--surface2); color: var(--muted); font-weight: 500; }

.lines p { margin: 0 0 8px; }

@media (max-width: 900px) {
  main { padding: 16px; }
  .top { padding: 10px 16px; }
  .hero { grid-template-columns: 1fr; }
  .grid { grid-template-columns: 1fr; }
  .rings { flex-wrap: nowrap; padding: 18px 8px; gap: 4px; }
  .ring { flex: 1; min-width: 0; }
  .ringval { font-size: 56px; }
  .ring .lbl { font-size: 10px; letter-spacing: 1px; }
  .ring .cap { font-size: 11px; }
  .daynav { margin-left: 0; width: 100%; justify-content: space-between; }
}

.card h3.gap { margin-top: 22px; }
.grid > section.wide:not(.card) { display: flex; align-items: center; justify-content: space-between; margin-top: 10px; }
.grid > section.wide:not(.card) .range { margin: 0; }
.dot { background: var(--muted); }

a.btn { display: inline-block; font-weight: 600; color: #04120a; background: var(--green); border-radius: 999px; padding: 12px 22px; text-decoration: none; margin: 14px 0 6px; }
a.btn:focus-visible { outline: 2px solid var(--text); outline-offset: 2px; }
details { margin-top: 14px; }
summary { cursor: pointer; color: var(--muted); }
summary:focus-visible { outline: 2px solid var(--green); outline-offset: 2px; border-radius: 4px; }
details[open] summary { margin-bottom: 8px; }

[hidden] { display: none !important; }