/* NightKnight — Hub System themed dashboard.
   Palette: ink #0C1014, tile #111519, paper #F4F5F6, alert red #E5484D.
   Glucose bands use a calm clinical scheme. */
:root {
  --ink: #0b0e12;
  --tile: #121821;
  --tile-2: #161d27;
  --rim: #232c38;
  --rim-soft: #1b232e;
  --text: #eef1f4;
  --muted: #93a0ad;
  --accent: #e5484d;
  --accent-soft: rgba(229, 72, 77, 0.16);

  --g-inrange: #36c46b;
  --g-warn: #e0a23c;
  --g-danger: #e5484d;

  --radius: 20px;
  --radius-sm: 12px;
  --gap: 18px;
  --shadow: 0 18px 40px -24px rgba(0, 0, 0, 0.85);
  font-synthesis: none;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  min-height: 100vh;
  background: var(--ink);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* Ambient aurora backdrop */
.aurora {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(60% 50% at 80% -5%, rgba(229, 72, 77, 0.10), transparent 70%),
    radial-gradient(50% 45% at 8% 5%, rgba(54, 196, 107, 0.08), transparent 70%),
    radial-gradient(70% 60% at 50% 110%, rgba(46, 86, 160, 0.12), transparent 70%);
  filter: saturate(1.1);
}

h2 { font-size: 0.78rem; font-weight: 650; text-transform: uppercase; letter-spacing: 0.09em; color: var(--muted); margin: 0; }
.muted { color: var(--muted); font-size: 0.86rem; line-height: 1.5; margin: 0 0 14px; }
small { font-size: 0.5em; font-weight: 600; color: var(--muted); margin-left: 2px; }

/* Top bar */
.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px 18px; flex-wrap: wrap;
  padding: 14px 22px;
  background: rgba(11, 14, 18, 0.72);
  backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid var(--rim-soft);
}
.brand { display: flex; align-items: center; gap: 11px; }
.brand-mark { border-radius: 8px; display: block; box-shadow: 0 0 0 1px var(--rim); }
.brand-name { font-weight: 750; letter-spacing: -0.02em; font-size: 1.08rem; }
.brand-accent { color: var(--accent); }
.topbar-right { display: flex; align-items: center; gap: 14px; flex: 0 0 auto; }
.topbar-left { flex: 0 1 auto; min-width: 0; }
.user-email { color: var(--muted); font-size: 0.82rem; max-width: 22vw; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Segmented controls */
.seg { display: inline-flex; background: var(--tile); border: 1px solid var(--rim); border-radius: 999px; padding: 3px; gap: 2px; }
.seg-btn {
  border: 0; background: transparent; color: var(--muted); font: inherit; font-size: 0.8rem; font-weight: 600;
  padding: 6px 13px; border-radius: 999px; cursor: pointer; transition: color .15s, background .15s, transform .05s;
  white-space: nowrap;
}
.seg-btn:hover { color: var(--text); }
.seg-btn:active { transform: scale(0.96); }
.seg-btn.is-active { background: linear-gradient(180deg, #2a333f, #20283200); color: #fff; box-shadow: inset 0 0 0 1px var(--rim); }
.unit-toggle .seg-btn.is-active, .provider-toggle .seg-btn.is-active { background: var(--accent); color: #fff; box-shadow: none; }

/* Layout */
.layout { max-width: 1040px; margin: 0 auto; padding: var(--gap); display: grid; gap: var(--gap); grid-template-columns: 1fr 1fr; }
.card {
  background: linear-gradient(180deg, var(--tile-2), var(--tile));
  border: 1px solid var(--rim); border-radius: var(--radius); padding: 22px;
  box-shadow: var(--shadow);
}
.hero, .analytics-card, .chart-card { grid-column: 1 / -1; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }

/* Hero current value */
.hero { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; position: relative; overflow: hidden; }
.hero::after { content: ""; position: absolute; right: -40px; top: -60px; width: 220px; height: 220px; border-radius: 50%; background: var(--band-glow, transparent); filter: blur(60px); opacity: .5; pointer-events: none; }
.hero-main { display: flex; align-items: baseline; gap: 16px; }
.bg-value { font-size: clamp(3.4rem, 12vw, 5.4rem); font-weight: 800; line-height: .9; letter-spacing: -0.04em; font-variant-numeric: tabular-nums; }
.hero-side { display: flex; flex-direction: column; gap: 4px; }
.bg-unit { color: var(--muted); font-size: 1rem; font-weight: 600; }
.bg-trend { font-size: 2rem; line-height: 1; }
/* Last-hour sparkline that sits between the spotlight number and the meta column. */
.hero-spark { flex: 1 1 110px; min-width: 84px; max-width: 300px; height: 50px; align-self: center; }
.hero-spark[hidden] { display: none; }
@media (max-width: 460px) { .hero-spark { flex-basis: 100%; order: 3; height: 44px; } }
.hero-meta { display: flex; flex-direction: column; align-items: flex-end; gap: 8px; }
.bg-age { color: var(--muted); font-size: 0.84rem; }
.pill { font-variant-numeric: tabular-nums; font-size: 0.82rem; font-weight: 650; padding: 4px 11px; border-radius: 999px; background: var(--tile); border: 1px solid var(--rim); color: var(--muted); }
.pill[hidden] { display: none; }
/* Tint the level pill to match the reading's band, so status reads at a glance and
   does not rely on colour alone (the text says "Urgent low" etc.). */
.pill[data-band="inrange"] { color: var(--g-inrange); border-color: color-mix(in srgb, var(--g-inrange) 40%, var(--rim)); }
.pill[data-band="warn"] { color: var(--g-warn); border-color: color-mix(in srgb, var(--g-warn) 45%, var(--rim)); }
.pill[data-band="danger"] { color: var(--g-danger); border-color: color-mix(in srgb, var(--g-danger) 50%, var(--rim)); }
.hero[data-band="inrange"] { --band-glow: rgba(54,196,107,.5); }
.hero[data-band="inrange"] .bg-value { color: var(--g-inrange); }
.hero[data-band="warn"] { --band-glow: rgba(224,162,60,.5); }
.hero[data-band="warn"] .bg-value { color: var(--g-warn); }
.hero[data-band="danger"] { --band-glow: rgba(229,72,77,.55); }
.hero[data-band="danger"] .bg-value { color: var(--g-danger); }

/* Metric tiles */
.metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 16px; }
.metric { background: var(--tile); border: 1px solid var(--rim); border-radius: var(--radius-sm); padding: 14px 16px; display: flex; flex-direction: column; gap: 3px; }
.metric-hero { background: linear-gradient(180deg, rgba(229,72,77,.08), var(--tile)); border-color: #33262a; }
.metric-label { color: var(--muted); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; display: inline-flex; align-items: center; gap: 5px; }
.metric-label.exact { text-transform: none; letter-spacing: 0.01em; }
.metric-value { font-size: 1.7rem; font-weight: 750; font-variant-numeric: tabular-nums; line-height: 1.1; }
.metric-sub { color: var(--muted); font-size: 0.74rem; }

/* Time in range bar */
.tir-bar { display: flex; height: 14px; border-radius: 8px; overflow: hidden; background: var(--tile); border: 1px solid var(--rim); }
.tir-seg { height: 100%; transition: width .4s ease; }
.tir-legend { display: flex; flex-wrap: wrap; gap: 8px 16px; margin-top: 12px; font-size: 0.78rem; color: var(--muted); }
.tir-legend .dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin-right: 6px; vertical-align: middle; }

/* Chart */
.chart-wrap { position: relative; width: 100%; aspect-ratio: 16 / 6.5; min-height: 220px; }
#chart { width: 100%; height: 100%; display: block; }
.chart-empty { position: absolute; inset: 0; display: grid; place-items: center; color: var(--muted); }

/* Forms */
.stack-form { display: flex; gap: 10px; flex-wrap: wrap; margin: 4px 0 8px; }
.stack-form input, .stack-form select {
  background: var(--tile); border: 1px solid var(--rim); color: var(--text);
  border-radius: var(--radius-sm); padding: 11px 13px; font: inherit; flex: 1; min-width: 150px; transition: border-color .15s;
}
.stack-form input:focus, .stack-form select:focus { outline: none; border-color: var(--accent); }
.stack-form button {
  background: var(--accent); color: #fff; border: 0; border-radius: var(--radius-sm); padding: 11px 20px; font: inherit; font-weight: 650; cursor: pointer; transition: filter .15s, transform .05s;
}
.stack-form button:hover { filter: brightness(1.08); }
.stack-form button:active { transform: scale(0.97); }

.reveal { background: var(--tile); border: 1px dashed var(--accent); border-radius: var(--radius-sm); padding: 12px 14px; margin: 8px 0; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.82rem; word-break: break-all; }

/* Status lists (connectors + tokens) */
.status-list { list-style: none; padding: 0; margin: 8px 0 0; }
.status-list li { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 12px 0; border-top: 1px solid var(--rim-soft); }
.status-list .s-title { font-weight: 650; }
.status-list .s-sub { color: var(--muted); font-size: 0.78rem; }
.status-list .s-dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; margin-right: 7px; background: var(--muted); }
.status-list .s-dot.ok { background: var(--g-inrange); }
.status-list .s-dot.err { background: var(--g-danger); }
.status-list button { background: transparent; border: 1px solid var(--rim); color: var(--muted); border-radius: 9px; padding: 6px 12px; cursor: pointer; font: inherit; font-size: 0.8rem; transition: .15s; }
.status-list button:hover { border-color: var(--accent); color: var(--accent); }

/* Banner */
.banner {
  position: fixed; left: 50%; bottom: 18px; transform: translateX(-50%);
  background: var(--tile-2); border: 1px solid var(--rim); border-left: 3px solid var(--accent);
  padding: 12px 18px; border-radius: var(--radius-sm); max-width: 90vw; box-shadow: var(--shadow); font-size: 0.88rem;
}

/* ── Tabs (top nav) ───────────────────────────────────────────────── */
.topbar-left { display: flex; align-items: center; gap: 22px; min-width: 0; }
.tabs { display: inline-flex; gap: 2px; padding: 3px; background: var(--tile); border: 1px solid var(--rim); border-radius: 12px; }
.tab { border: 0; background: transparent; color: var(--muted); font: inherit; font-weight: 600; font-size: 0.85rem; padding: 7px 15px; border-radius: 9px; cursor: pointer; transition: color .15s, background .15s; white-space: nowrap; }
.tab:hover { color: var(--text); }
.tab.is-active { background: rgba(255, 255, 255, 0.09); color: #fff; }

/* ── Page headers (Analysis / Settings) ───────────────────────────── */
.layout.single { grid-template-columns: 1fr; }
.page-head { grid-column: 1 / -1; display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.page-title { font-size: 1.7rem; font-weight: 800; letter-spacing: -0.02em; margin: 0; color: var(--text); }
.page-sub { color: var(--muted); margin: 6px 0 0; font-size: 0.9rem; }
.caption { grid-column: 1 / -1; color: var(--muted); font-size: 0.82rem; margin: 0; }
.disclaimer { grid-column: 1 / -1; color: #5d6470; font-size: 0.76rem; line-height: 1.5; margin: 6px 2px 0; }

/* ── Inner grids ──────────────────────────────────────────────────── */
.grid-340 { grid-column: 1 / -1; display: grid; grid-template-columns: 340px 1fr; gap: var(--gap); align-items: start; }
.grid-2 { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap); align-items: start; }
.metric-grid.three { grid-template-columns: repeat(3, 1fr); }
.metric-grid.four { grid-template-columns: repeat(4, 1fr); }
.metric-note { color: var(--muted); font-size: 0.74rem; margin-top: 4px; }

/* ── Info tooltips (the "?" explanations) ─────────────────────────── */
h2 { display: inline-flex; align-items: center; gap: 7px; }
.info {
  display: inline-grid; place-items: center; width: 16px; height: 16px; border-radius: 50%;
  background: var(--tile); border: 1px solid var(--rim); color: var(--muted);
  font-size: 0.66rem; font-weight: 700; cursor: help; position: relative; text-transform: none; letter-spacing: 0;
}
.info:hover, .info:focus-visible { color: var(--text); border-color: var(--accent); outline: none; }
.info .tip {
  position: absolute; bottom: calc(100% + 8px); left: 50%; transform: translateX(-50%);
  width: max-content; max-width: 260px; background: var(--tile-2); color: var(--text);
  border: 1px solid var(--rim); border-radius: 10px; padding: 10px 12px; font-size: 0.76rem;
  font-weight: 400; line-height: 1.45; letter-spacing: 0; text-transform: none;
  box-shadow: var(--shadow); opacity: 0; visibility: hidden; transition: opacity .12s; z-index: 20; pointer-events: none;
  white-space: normal;
}
.info:hover .tip, .info:focus-within .tip, .info:focus-visible .tip { opacity: 1; visibility: visible; }
/* keep tooltips inside the viewport edges */
.metric .info .tip, .grid-340 > .card:first-child .info .tip { left: 0; transform: none; }

/* ── GRI card ─────────────────────────────────────────────────────── */
.gri-top { display: flex; align-items: flex-end; gap: 14px; }
.gri-num { font-size: 3.8rem; font-weight: 800; letter-spacing: -0.03em; line-height: 0.85; font-variant-numeric: tabular-nums; }
.zone-badge { display: inline-flex; align-items: center; gap: 7px; padding: 6px 12px; border-radius: 999px; background: var(--tile); border: 1px solid var(--rim); font-size: 0.82rem; font-weight: 700; margin-bottom: 6px; }
.zone-dot { width: 8px; height: 8px; border-radius: 50%; }
.gri-hint { margin-top: 8px; color: var(--muted); font-size: 0.78rem; }
.gri-comp { margin-top: 20px; display: flex; flex-direction: column; gap: 15px; }
.gri-comp-row .gri-comp-head { display: flex; justify-content: space-between; font-size: 0.8rem; margin-bottom: 7px; }
.gri-comp-head .lbl { color: var(--muted); display: inline-flex; align-items: center; gap: 6px; }
.gri-comp-head .val { font-weight: 700; font-variant-numeric: tabular-nums; }
.gri-bar { height: 7px; border-radius: 999px; background: var(--ink); overflow: hidden; }
.gri-bar > div { height: 100%; border-radius: 999px; transition: width .4s ease; }

/* ── AGP ──────────────────────────────────────────────────────────── */
.agp-wrap { position: relative; width: 100%; }
.agp-wrap svg { display: block; width: 100%; height: auto; }
.agp-empty { display: grid; place-items: center; height: 240px; color: var(--muted); }
.agp-legend { display: flex; flex-wrap: wrap; gap: 14px 22px; margin-top: 12px; font-size: 0.78rem; color: var(--muted); }
.agp-legend span { display: inline-flex; align-items: center; gap: 8px; }
.agp-legend .ln { width: 16px; height: 0; border-top: 2px solid; }
.agp-legend .ln.median { border-color: var(--text); }
.agp-legend .ln.target { border-top-style: dashed; border-color: rgba(54, 196, 107, 0.7); }
.agp-legend .sw { width: 16px; height: 11px; border-radius: 3px; }
.agp-legend .sw.iqr { background: rgba(54, 196, 107, 0.28); }
.agp-legend .sw.outer { background: rgba(54, 196, 107, 0.13); }

/* ── Episodes ─────────────────────────────────────────────────────── */
.ep-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-bottom: 16px; }
.ep-stat .ep-n { font-size: 1.7rem; font-weight: 800; line-height: 1; font-variant-numeric: tabular-nums; }
.ep-stat .ep-cap { margin-top: 6px; color: var(--muted); font-size: 0.74rem; }
.ep-summary { color: var(--muted); font-size: 0.78rem; margin: 0 0 12px; }
.ep-list { display: flex; flex-direction: column; gap: 8px; }
.ep-row { display: flex; align-items: center; gap: 12px; padding: 10px 14px; background: var(--tile); border: 1px solid var(--rim-soft); border-radius: 11px; font-size: 0.8rem; }
.ep-row .ep-dot { width: 8px; height: 8px; border-radius: 50%; flex: 0 0 auto; }
.ep-row .ep-kind { font-weight: 700; width: 42px; }
.ep-row .ep-time { color: var(--muted); }
.ep-row .ep-detail { margin-left: auto; color: var(--muted); }

/* ── Settings: display & targets ──────────────────────────────────── */
.targets-row { display: flex; gap: 28px; flex-wrap: wrap; align-items: flex-end; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field-label { color: var(--muted); font-size: 0.78rem; font-weight: 600; }
.targets-row input[type="number"] { width: 130px; background: var(--tile); border: 1px solid var(--rim); color: var(--text); border-radius: var(--radius-sm); padding: 11px 13px; font: inherit; font-weight: 700; }
.targets-row input:focus { outline: none; border-color: var(--accent); }
.target-note { margin-top: 14px; }

/* File-upload button (LibreView import) */
.file-btn { display: inline-block; background: var(--accent); color: #fff; border-radius: var(--radius-sm); padding: 11px 20px; font: inherit; font-weight: 650; cursor: pointer; transition: filter .15s, transform .05s; }
.file-btn:hover { filter: brightness(1.08); }
.file-btn:active { transform: scale(0.97); }

/* ── Chart hover tooltip ──────────────────────────────────────────── */
.chart-tip {
  position: absolute; transform: translate(-50%, -100%); pointer-events: none;
  background: var(--tile-2); border: 1px solid var(--rim); border-radius: 9px; padding: 6px 10px;
  font-size: 0.78rem; box-shadow: var(--shadow); white-space: nowrap; z-index: 5;
}
.chart-tip .ct-val { font-weight: 700; font-variant-numeric: tabular-nums; }
.chart-tip .ct-time { color: var(--muted); margin-left: 6px; }

@media (max-width: 1040px) { .user-email { display: none; } }
@media (max-width: 820px) {
  .grid-340, .grid-2 { grid-template-columns: 1fr; }
  .metric-grid.three { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .metric-grid, .metric-grid.three, .metric-grid.four { grid-template-columns: repeat(2, 1fr); }
  .layout { padding: 12px; gap: 12px; }
  .card { padding: 18px; }
  .user-email { display: none; }
  .topbar { padding: 12px 14px; }
  .topbar-left { gap: 12px; }
  .brand-name { display: none; }
  .tab { padding: 7px 11px; font-size: 0.8rem; }
  .ep-stats { grid-template-columns: 1fr; }
}

/* ── Data coverage page ───────────────────────────────────────────── */
:root { --cal-empty: #161d27; --cal-nostat: #39434f; }
.metric-grid.data-summary { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }

.cal-wrap { overflow-x: auto; padding: 2px 0 4px; }
.cal-wrap svg { display: block; }
.cal-month { fill: var(--muted); font-size: 10px; font-weight: 600; }
.cal-dow { fill: var(--muted); font-size: 9px; }
.cal-wrap rect { stroke: rgba(255, 255, 255, 0.05); stroke-width: 1; transition: stroke .12s; }
.cal-wrap rect:hover { stroke: var(--text); stroke-width: 1.5; }
.cal-legend { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 14px; color: var(--muted); font-size: 0.74rem; }
.cal-leg-item { display: inline-flex; align-items: center; gap: 5px; }
.cal-leg-sw { width: 12px; height: 12px; border-radius: 3px; border: 1px solid rgba(255, 255, 255, 0.06); display: inline-block; }
.cal-leg-label { font-size: 0.72rem; }

.day-list { display: flex; flex-direction: column; gap: 6px; max-height: 640px; overflow-y: auto; }
.day-row {
  display: grid; grid-template-columns: 150px minmax(150px, 1.4fr) 92px 1fr 62px 96px;
  align-items: center; gap: 14px; padding: 9px 12px;
  background: var(--tile); border: 1px solid var(--rim-soft); border-radius: 10px;
}
.day-row:hover { border-color: var(--rim); }
.day-head {
  position: sticky; top: 0; z-index: 1; background: var(--ink); border: 0; padding: 4px 12px 6px;
  color: var(--muted); font-size: 0.72rem; letter-spacing: 0.02em;
}
.day-head:hover { border: 0; }
.day-date { display: flex; flex-direction: column; line-height: 1.15; min-width: 0; }
.day-dow { color: var(--muted); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.05em; }
.day-num { font-weight: 650; font-size: 0.88rem; font-variant-numeric: tabular-nums; }
.day-cov { display: flex; align-items: center; gap: 8px; min-width: 0; }
.cov-bar { flex: 1; height: 7px; min-width: 34px; background: var(--ink); border-radius: 4px; overflow: hidden; }
.cov-fill { height: 100%; background: var(--g-inrange); border-radius: 4px; }
.day-cov-pct { font-size: 0.78rem; font-variant-numeric: tabular-nums; width: 34px; text-align: right; }
.day-n { font-size: 0.72rem; color: var(--muted); width: 64px; text-align: right; }
.day-mean { font-weight: 700; font-variant-numeric: tabular-nums; }
.day-mean-v { font-size: 1.02rem; }
.day-tir { min-width: 0; }
.day-tir-bar { display: flex; width: 100%; height: 8px; border-radius: 5px; overflow: hidden; background: var(--ink); }
.day-tir-bar > div { height: 100%; }
.day-ugmi { font-variant-numeric: tabular-nums; font-weight: 650; font-size: 0.9rem; }
.day-range { font-variant-numeric: tabular-nums; color: var(--muted); font-size: 0.82rem; text-align: right; }

@media (max-width: 720px) {
  .day-row { grid-template-columns: 1fr auto; row-gap: 9px; column-gap: 12px; }
  .day-head { display: none; }
  .day-date { grid-column: 1; grid-row: 1; }
  .day-mean { grid-column: 2; grid-row: 1; text-align: right; justify-self: end; }
  .day-cov { grid-column: 1 / -1; grid-row: 2; }
  .day-tir { grid-column: 1 / -1; grid-row: 3; }
  .day-ugmi { grid-column: 1; grid-row: 4; }
  .day-range { grid-column: 2; grid-row: 4; }
}