/* VayuSudh cloud dashboard — stylesheet.
   One file, no framework, no CDN. Light and dark both first-class: an operator
   checking a unit at 2am should not be flashbanged, and one checking it on a
   factory floor at noon needs contrast. */

:root {
  color-scheme: light dark;

  --bg:        #f6f8fb;
  --surface:   #ffffff;
  --surface-2: #f1f5f9;
  --border:    #e2e8f0;
  --text:      #0f172a;
  --muted:     #64748b;
  --faint:     #94a3b8;

  --accent:      #0e7490;
  --accent-soft: #ecfeff;
  --accent-text: #ffffff;

  --good:     #16a34a;
  --warning:  #ca8a04;
  --serious:  #ea580c;
  --critical: #dc2626;

  --radius:   12px;
  --radius-s: 8px;
  --shadow:   0 1px 2px rgba(15, 23, 42, .06), 0 8px 24px -12px rgba(15, 23, 42, .18);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:        #0b1220;
    --surface:   #111a2b;
    --surface-2: #17223a;
    --border:    #223049;
    --text:      #e8edf7;
    --muted:     #94a3b8;
    --faint:     #64748b;
    --accent:      #22d3ee;
    --accent-soft: #0d2b33;
    --accent-text: #04222b;
    --shadow:   0 1px 2px rgba(0, 0, 0, .4), 0 10px 30px -14px rgba(0, 0, 0, .7);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code, .mono { font-family: var(--mono); font-size: .9em; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; font-weight: 650; letter-spacing: -.01em; }
h1 { font-size: 22px; }
h2 { font-size: 17px; }
h3 { font-size: 15px; }
.muted { color: var(--muted); font-size: 13.5px; }
.faint { color: var(--faint); }

/* --- Layout --------------------------------------------------------------- */

.shell { display: flex; min-height: 100vh; }

.sidebar {
  width: 232px;
  flex: 0 0 232px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 20px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.main { flex: 1; min-width: 0; padding: 26px 30px 60px; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  margin-bottom: 18px;
  padding: 0 8px;
}
.brand-mark {
  width: 34px; height: 34px;
  flex: 0 0 34px;
  display: grid; place-items: center;
  border-radius: 9px;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 800;
  font-size: 13px;
  letter-spacing: .04em;
}
.brand strong { display: block; font-size: 15px; letter-spacing: -.01em; }
.brand span { display: block; font-size: 11.5px; color: var(--muted); }

.nav-link {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 11px;
  border-radius: var(--radius-s);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
}
.nav-link:hover { background: var(--surface-2); text-decoration: none; }
.nav-link.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.nav-sep { margin: 12px 10px 6px; font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: var(--faint); }
.nav-badge {
  margin-left: auto;
  background: var(--critical);
  color: #fff;
  border-radius: 999px;
  padding: 1px 7px;
  font-size: 11px;
  font-weight: 700;
}
.sidebar-foot { margin-top: auto; padding: 12px 10px 0; border-top: 1px solid var(--border); font-size: 12.5px; color: var(--muted); }

/* --- Cards ---------------------------------------------------------------- */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow);
}
.card + .card { margin-top: 16px; }
.card-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; margin-bottom: 14px; flex-wrap: wrap;
}
.card-head h2 { margin: 0; }

.grid { display: grid; gap: 16px; }
.grid-kpi  { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.grid-half { grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); }
.grid-cards{ grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }

/* --- KPI tiles ------------------------------------------------------------ */

.kpi { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 15px 17px; }
.kpi-label { font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin-bottom: 6px; }
.kpi-value { font-size: 26px; font-weight: 680; letter-spacing: -.02em; line-height: 1.15; }
.kpi-value small { font-size: 14px; font-weight: 500; color: var(--muted); margin-left: 3px; }
.kpi-sub { font-size: 12.5px; color: var(--muted); margin-top: 4px; }

/* --- Tables --------------------------------------------------------------- */

.table-wrap { overflow-x: auto; margin: 0 -20px -18px; padding: 0 20px 18px; }
table.data { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 560px; }
table.data th {
  text-align: left; font-size: 11.5px; text-transform: uppercase; letter-spacing: .06em;
  color: var(--muted); font-weight: 600; padding: 0 12px 9px 0; border-bottom: 1px solid var(--border); white-space: nowrap;
}
table.data td { padding: 11px 12px 11px 0; border-bottom: 1px solid var(--border); vertical-align: middle; }
table.data tr:last-child td { border-bottom: 0; }
table.data tr:hover td { background: var(--surface-2); }
table.data td.num { font-variant-numeric: tabular-nums; }

/* --- Status + severity ---------------------------------------------------- */

.pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 2px 9px; border-radius: 999px;
  font-size: 12px; font-weight: 600; white-space: nowrap;
  border: 1px solid transparent;
}
.dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; flex: 0 0 7px; }

.pill-online  { color: var(--good);     background: color-mix(in srgb, var(--good) 12%, transparent); }
.pill-offline { color: var(--muted);    background: var(--surface-2); }
.pill-never   { color: var(--faint);    background: var(--surface-2); }

.sev-good     { color: var(--good);     background: color-mix(in srgb, var(--good) 12%, transparent); }
.sev-warning  { color: var(--warning);  background: color-mix(in srgb, var(--warning) 14%, transparent); }
.sev-serious  { color: var(--serious);  background: color-mix(in srgb, var(--serious) 14%, transparent); }
.sev-critical { color: var(--critical); background: color-mix(in srgb, var(--critical) 14%, transparent); }

/* --- Buttons + forms ------------------------------------------------------ */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  padding: 8px 15px; border-radius: var(--radius-s);
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  font-size: 14px; font-weight: 600; cursor: pointer; font-family: inherit;
  transition: filter .12s ease, background .12s ease;
}
.btn:hover { background: var(--surface-2); text-decoration: none; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn-primary:hover { filter: brightness(1.08); background: var(--accent); }
.btn-danger { color: var(--critical); border-color: color-mix(in srgb, var(--critical) 40%, var(--border)); }
.btn-sm { padding: 5px 11px; font-size: 13px; }
.btn-block { width: 100%; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

label { display: block; margin-bottom: 13px; font-size: 13.5px; font-weight: 600; color: var(--text); }
input[type=text], input[type=email], input[type=password], input[type=number], select, textarea {
  width: 100%; margin-top: 5px;
  padding: 9px 11px;
  border: 1px solid var(--border); border-radius: var(--radius-s);
  background: var(--bg); color: var(--text);
  font: inherit; font-size: 14px; font-weight: 400;
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid color-mix(in srgb, var(--accent) 45%, transparent);
  outline-offset: 1px; border-color: var(--accent);
}
textarea { min-height: 84px; resize: vertical; }
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 0 16px; }
fieldset { border: 0; padding: 0; margin: 0 0 6px; }

/* --- Alerts --------------------------------------------------------------- */

.alert { padding: 11px 14px; border-radius: var(--radius-s); font-size: 13.5px; margin: 0 0 16px; border: 1px solid transparent; }
.alert-ok   { background: color-mix(in srgb, var(--good) 12%, transparent);     border-color: color-mix(in srgb, var(--good) 30%, transparent); color: var(--good); }
.alert-err  { background: color-mix(in srgb, var(--critical) 12%, transparent); border-color: color-mix(in srgb, var(--critical) 30%, transparent); color: var(--critical); }
.alert-warn { background: color-mix(in srgb, var(--warning) 12%, transparent);  border-color: color-mix(in srgb, var(--warning) 30%, transparent); color: var(--warning); }
.alert-info { background: var(--accent-soft); border-color: color-mix(in srgb, var(--accent) 25%, transparent); color: var(--accent); }
.alert strong { font-weight: 700; }

/* --- Auth pages ----------------------------------------------------------- */

.auth-page { display: grid; place-items: center; min-height: 100vh; padding: 24px; }
.auth-card {
  width: 100%; max-width: 400px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; padding: 28px; box-shadow: var(--shadow);
}
.auth-card h1 { font-size: 19px; margin-bottom: 6px; }
.auth-card .btn { margin-top: 6px; }

/* --- Key reveal ----------------------------------------------------------- */

.keybox {
  background: var(--surface-2); border: 1px dashed var(--border);
  border-radius: var(--radius-s); padding: 13px 15px; margin: 12px 0;
  font-family: var(--mono); font-size: 13px; word-break: break-all; line-height: 1.7;
}
.keybox .k { color: var(--muted); user-select: none; }
.copy-row { display: flex; gap: 8px; align-items: center; margin-top: 10px; flex-wrap: wrap; }

/* --- Charts --------------------------------------------------------------- */

.chart { width: 100%; height: 210px; display: block; overflow: visible; }
.chart .grid-line { stroke: var(--border); stroke-width: 1; }
.chart .axis-label { fill: var(--faint); font-size: 10px; font-family: var(--mono); }
.chart-legend { display: flex; gap: 16px; flex-wrap: wrap; font-size: 12.5px; color: var(--muted); margin-top: 8px; }
.chart-legend span { display: inline-flex; align-items: center; gap: 6px; }
.swatch { width: 11px; height: 3px; border-radius: 2px; }
.chart-empty { display: grid; place-items: center; height: 210px; color: var(--faint); font-size: 13.5px; }

/* --- Misc ----------------------------------------------------------------- */

.empty { padding: 34px 20px; text-align: center; color: var(--muted); font-size: 14px; }
.empty h3 { color: var(--text); }
.stack > * + * { margin-top: 10px; }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.tag { font-size: 11.5px; color: var(--muted); background: var(--surface-2); border-radius: 5px; padding: 2px 7px; font-family: var(--mono); }
hr.sep { border: 0; border-top: 1px solid var(--border); margin: 18px 0; }

.ai-note { border-left: 3px solid var(--accent); padding: 4px 0 4px 13px; margin: 12px 0; }
.ai-note .ai-flag { font-size: 11px; text-transform: uppercase; letter-spacing: .07em; color: var(--faint); }

@media (max-width: 860px) {
  .shell { flex-direction: column; }
  .sidebar {
    width: auto; flex: none; height: auto; position: static;
    flex-direction: row; align-items: center; overflow-x: auto;
    padding: 10px 12px; gap: 6px;
  }
  .brand { margin: 0 10px 0 0; padding: 0; }
  .brand span { display: none; }
  .nav-sep, .sidebar-foot { display: none; }
  .nav-link { white-space: nowrap; padding: 7px 11px; }
  .main { padding: 18px 16px 50px; }
}