/* MailHub UI.
   Colour roles come from the validated reference palette; light and dark are
   each selected steps, not an automatic flip. Status colour never carries
   meaning alone — every badge ships an icon + a text label. */

:root {
  color-scheme: light;
  --surface-1:   #fcfcfb;
  --plane:       #f9f9f7;
  --ink:         #0b0b0b;
  --ink-2:       #52514e;
  --muted:       #898781;
  --grid:        #e1e0d9;
  --baseline:    #c3c2b7;
  --border:      rgba(11, 11, 11, .10);

  --accent:      #2a78d6;   /* series slot 1 */
  --accent-soft: #cde2fb;   /* blue 100 — meter track */
  --good:        #0ca30c;
  --warning:     #fab219;
  --serious:     #ec835a;
  --critical:    #d03b3b;
  --good-text:   #006300;

  --radius: 10px;
  --font: system-ui, -apple-system, "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --surface-1: #1a1a19;
    --plane:     #0d0d0d;
    --ink:       #ffffff;
    --ink-2:     #c3c2b7;
    --muted:     #898781;
    --grid:      #2c2c2a;
    --baseline:  #383835;
    --border:    rgba(255, 255, 255, .10);
    --accent:      #3987e5;
    --accent-soft: #184f95;
    --good-text:   #0ca30c;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --surface-1: #1a1a19;
  --plane:     #0d0d0d;
  --ink:       #ffffff;
  --ink-2:     #c3c2b7;
  --grid:      #2c2c2a;
  --baseline:  #383835;
  --border:    rgba(255, 255, 255, .10);
  --accent:      #3987e5;
  --accent-soft: #184f95;
  --good-text:   #0ca30c;
}

* { box-sizing: border-box; }
body {
  margin: 0; background: var(--plane); color: var(--ink);
  font: 15px/1.55 var(--font); -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5rem; font-weight: 600; }
h1 { font-size: 1.5rem; }
h2 { font-size: 1.15rem; }
h3 { font-size: .95rem; }
p { margin: 0 0 .75rem; }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .86em; }

/* ---------- layout ---------- */
.shell { display: flex; min-height: 100vh; }
.side {
  width: 216px; flex: 0 0 216px; background: var(--surface-1);
  border-right: 1px solid var(--border); padding: 18px 12px; position: sticky; top: 0; height: 100vh;
  display: flex; flex-direction: column;
}
.brand { font-weight: 600; font-size: 1.05rem; padding: 0 10px 14px; letter-spacing: -.01em; }
.brand small { display: block; font-weight: 400; font-size: .72rem; color: var(--muted); letter-spacing: 0; }
.nav a {
  display: flex; align-items: center; gap: 9px; padding: 8px 10px; border-radius: 8px;
  color: var(--ink-2); text-decoration: none; font-size: .9rem;
}
.nav a:hover { background: var(--plane); color: var(--ink); }
.nav a.on { background: var(--accent-soft); color: var(--ink); font-weight: 500; }
.nav a .ic { width: 18px; text-align: center; opacity: .85; }
.side-foot { margin-top: auto; padding: 10px; border-top: 1px solid var(--border); font-size: .8rem; color: var(--muted); }
.main { flex: 1; min-width: 0; padding: 26px 30px 60px; max-width: 1180px; }
.head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 20px; }
.head .sub { color: var(--ink-2); font-size: .9rem; margin: 0; }

/* ---------- cards ---------- */
.card {
  background: var(--surface-1); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px; margin-bottom: 18px;
}
.card > h2:first-child, .card > h3:first-child { margin-top: 0; }
.card-note { color: var(--ink-2); font-size: .86rem; }
.grid { display: grid; gap: 14px; }
.g2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.g4 { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }

/* ---------- stat tiles ----------
   label (sentence case) · value (semibold, proportional figures) · optional note */
.tile {
  background: var(--surface-1); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 15px 16px;
}
.tile .label { font-size: .78rem; color: var(--ink-2); margin-bottom: 5px; }
.tile .value { font-size: 1.85rem; font-weight: 600; letter-spacing: -.02em; line-height: 1.1; }
.tile .note { font-size: .76rem; color: var(--muted); margin-top: 4px; }
.hero { font-size: 3rem; font-weight: 600; letter-spacing: -.03em; line-height: 1; }

/* ---------- meter ----------
   Fill carries severity; the track is a lighter step of the same ramp so the
   state reads across the whole bar. */
.meter { height: 8px; border-radius: 4px; background: var(--accent-soft); overflow: hidden; margin: 7px 0 5px; }
.meter > span { display: block; height: 100%; border-radius: 4px; background: var(--accent); }
.meter.is-warning > span  { background: var(--warning); }
.meter.is-critical > span { background: var(--critical); }
.meter-row { display: flex; justify-content: space-between; font-size: .76rem; color: var(--ink-2); }

/* ---------- status badges (icon + label, never colour alone) ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 5px; padding: 2px 8px; border-radius: 999px;
  font-size: .74rem; font-weight: 500; border: 1px solid var(--border); color: var(--ink-2);
  background: var(--plane); white-space: nowrap;
}
.badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--muted); flex: none; }
.badge.good     .dot { background: var(--good); }
.badge.warning  .dot { background: var(--warning); }
.badge.serious  .dot { background: var(--serious); }
.badge.critical .dot { background: var(--critical); }
.badge.good     { color: var(--good-text); }
.badge.critical { color: var(--critical); }

/* ---------- tables ---------- */
table { width: 100%; border-collapse: collapse; font-size: .88rem; }
th {
  text-align: left; font-weight: 500; font-size: .74rem; text-transform: uppercase;
  letter-spacing: .04em; color: var(--muted); padding: 0 10px 8px; border-bottom: 1px solid var(--grid);
}
td { padding: 10px; border-bottom: 1px solid var(--grid); vertical-align: middle; }
tr:last-child td { border-bottom: 0; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .84em; }
.dim { color: var(--muted); }
.empty { padding: 26px; text-align: center; color: var(--muted); font-size: .88rem; }

/* ---------- forms ---------- */
label.f { display: block; margin-bottom: 12px; font-size: .82rem; color: var(--ink-2); }
label.f > span { display: block; margin-bottom: 4px; font-weight: 500; }
input[type=text], input[type=email], input[type=password], input[type=number],
input[type=datetime-local], input[type=file], select, textarea {
  width: 100%; padding: 8px 10px; font: inherit; font-size: .9rem; color: var(--ink);
  background: var(--plane); border: 1px solid var(--baseline); border-radius: 8px;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }
textarea { min-height: 150px; resize: vertical; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .84rem; }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > * { flex: 1 1 180px; }
.check { display: flex; align-items: center; gap: 7px; font-size: .86rem; color: var(--ink-2); margin-bottom: 10px; }
.check input { width: auto; }

.btn {
  display: inline-flex; align-items: center; gap: 6px; padding: 8px 14px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--surface-1); color: var(--ink);
  font: inherit; font-size: .87rem; font-weight: 500; cursor: pointer; text-decoration: none;
}
.btn:hover { border-color: var(--baseline); }
.btn.primary { background: var(--accent); border-color: transparent; color: #fff; }
.btn.primary:hover { filter: brightness(1.06); }
.btn.danger { color: var(--critical); }
.btn.sm { padding: 5px 10px; font-size: .8rem; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
form.inline { display: inline; }

/* ---------- flash & callouts ---------- */
.flash, .callout {
  display: flex; gap: 9px; align-items: flex-start; padding: 11px 14px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--surface-1); font-size: .88rem; margin-bottom: 16px;
}
.flash .dot, .callout .dot { width: 8px; height: 8px; border-radius: 50%; margin-top: 6px; flex: none; background: var(--muted); }
.flash.success .dot, .callout.good .dot     { background: var(--good); }
.flash.warn .dot,    .callout.warning .dot  { background: var(--warning); }
.flash.error .dot,   .callout.critical .dot { background: var(--critical); }
.callout.info .dot { background: var(--accent); }
.callout ul { margin: 6px 0 0; padding-left: 18px; }
.callout li { margin-bottom: 3px; }

/* ---------- misc ---------- */
.kv { display: grid; grid-template-columns: max-content 1fr; gap: 5px 16px; font-size: .87rem; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; }
.tag { font-size: .72rem; padding: 1px 6px; border-radius: 5px; background: var(--plane); border: 1px solid var(--border); color: var(--ink-2); }
.split { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.stack > * + * { margin-top: 14px; }
hr { border: 0; border-top: 1px solid var(--grid); margin: 18px 0; }
.scroll { overflow-x: auto; }

.login-wrap { display: flex; min-height: 100vh; align-items: center; justify-content: center; padding: 20px; }
.login-card { width: 100%; max-width: 380px; }

@media (max-width: 820px) {
  .shell { flex-direction: column; }
  .side { width: auto; flex: none; height: auto; position: static; border-right: 0; border-bottom: 1px solid var(--border); }
  .nav { display: flex; flex-wrap: wrap; gap: 4px; }
  .main { padding: 20px 16px 50px; }
}