/* ==========================================================================
   VK Panel — industrial ops dashboard
   Palette: warm dark / sodium orange accent
   Type:    IBM Plex Sans (body) + IBM Plex Mono (data)
   ========================================================================== */

:root {
  --bg:           #0a0907;
  --bg-grid:      #0f0e0b;
  --surface:      #13110e;
  --surface-2:    #1a1814;
  --surface-3:    #211e19;
  --border:       #2a2621;
  --border-strong:#3a352d;

  --text:         #ebe7df;
  --text-muted:   #9a938a;
  --text-dim:     #5a5349;
  --text-faint:   #3a352d;

  --accent:       #ff8c42;  /* sodium orange */
  --accent-dim:   #b5622a;
  --accent-soft:  rgba(255, 140, 66, 0.08);
  --accent-glow:  rgba(255, 140, 66, 0.25);

  --ok:           #7ab87a;
  --warn:         #e8b46b;
  --danger:       #d97a6b;

  --font-sans:   'IBM Plex Sans', system-ui, sans-serif;
  --font-mono:   'IBM Plex Mono', ui-monospace, monospace;

  --sidebar-w: 232px;
  --gutter: 20px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  font-feature-settings: 'tnum' on, 'lnum' on;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--bg-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--bg-grid) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: .35;
  pointer-events: none;
  z-index: 0;
}

.app {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

/* ==========================================================================
   SIDEBAR
   ========================================================================== */

.sidebar {
  border-right: 1px solid var(--border);
  background: var(--surface);
  padding: 24px 0 20px;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 20px 28px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}
.brand-mark {
  width: 34px; height: 34px;
  display: grid; place-items: center;
  background: var(--accent);
  color: var(--bg);
  font-size: 18px;
  font-weight: 700;
}
.brand-title {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text);
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-top: 2px;
}

.nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 0 12px;
}
.nav-item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 12px;
  border-left: 2px solid transparent;
  font-size: 13px;
  color: var(--text-muted);
  transition: all .15s ease;
}
.nav-item:hover:not(.is-disabled) {
  color: var(--text);
  background: var(--surface-2);
}
.nav-item.is-active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: var(--accent-soft);
}
.nav-item.is-disabled {
  opacity: .35;
  cursor: not-allowed;
}
.nav-num {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  color: var(--text-dim);
  letter-spacing: 0.05em;
}
.nav-item.is-active .nav-num { color: var(--accent-dim); }
.nav-label {
  letter-spacing: 0.02em;
}

.sidebar-foot {
  padding: 20px;
  border-top: 1px solid var(--border);
  margin-top: auto;
}
.clock {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 500;
  color: var(--text);
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
}
.tz-label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-top: 4px;
}
.logout-btn {
  margin-top: 14px;
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text-muted);
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  width: 100%;
  text-align: left;
  transition: all .15s ease;
}
.logout-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ==========================================================================
   MAIN
   ========================================================================== */

.main {
  padding: 32px 40px 60px;
  max-width: 1600px;
  width: 100%;
}

.page-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.page-title {
  margin: 0;
  font-size: 28px;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.page-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-top: 6px;
}
.page-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  text-align: right;
}
.page-meta .hl { color: var(--accent); }

/* Section label — small industrial caption */
.section-label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 0 0 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.section-label::before {
  content: '';
  display: inline-block;
  width: 12px; height: 1px;
  background: var(--accent);
}

/* ==========================================================================
   STAT CARDS (top row)
   ========================================================================== */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  margin-bottom: 32px;
}
@media (max-width: 1100px) { .stat-grid { grid-template-columns: repeat(2, 1fr); } }

.stat {
  background: var(--surface);
  padding: 20px 22px 22px;
  position: relative;
  transition: background .2s ease;
}
.stat:hover { background: var(--surface-2); }
.stat-label {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.stat-value {
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 500;
  color: var(--text);
  line-height: 1;
  margin-top: 14px;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}
.stat-value.is-accent { color: var(--accent); }
.stat-foot {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
}
.stat-foot .delta { color: var(--text-dim); }

/* ==========================================================================
   HEALTH ROW (compact toggles/indicators)
   ========================================================================== */

.health-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  margin-bottom: 36px;
}
@media (max-width: 1100px) { .health-row { grid-template-columns: repeat(2, 1fr); } }
.health {
  background: var(--surface);
  padding: 14px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.health-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.health-value {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text);
}
.health-value.is-ok { color: var(--ok); }
.health-value.is-off { color: var(--text-dim); }

/* ==========================================================================
   TWO-COLUMN LAYOUT (groups + feed)
   ========================================================================== */

.two-col {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 32px;
  margin-bottom: 36px;
}
@media (max-width: 1200px) { .two-col { grid-template-columns: 1fr; } }

/* ---- groups grid ---- */
.groups-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
@media (max-width: 900px) { .groups-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .groups-grid { grid-template-columns: 1fr; } }

.group-card {
  background: var(--surface);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: background .15s ease;
}
.group-card:hover { background: var(--surface-2); }
.group-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.group-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
}
.group-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  margin-top: 2px;
  letter-spacing: 0.02em;
}
.group-stats {
  display: flex;
  gap: 18px;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}
.group-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.group-stat-label {
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.group-stat-value {
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
}
.group-stat-value.accent { color: var(--accent); }
.group-stat-value.muted  { color: var(--text-muted); }

/* LED status dot */
.led {
  width: 8px; height: 8px;
  border-radius: 0;
  flex-shrink: 0;
}
.led.is-ok     { background: var(--ok);    box-shadow: 0 0 6px rgba(122,184,122,.55); }
.led.is-warn   { background: var(--warn);  box-shadow: 0 0 6px rgba(232,180,107,.55); }
.led.is-dead   { background: var(--danger); box-shadow: 0 0 6px rgba(217,122,107,.55); }

/* ---- activity feed ---- */
.feed {
  border: 1px solid var(--border);
  background: var(--surface);
  height: 100%;
  display: flex;
  flex-direction: column;
}
.feed-head {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  display: flex;
  justify-content: space-between;
}
.feed-body { overflow-y: auto; max-height: 640px; }
.feed-item {
  padding: 10px 18px;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 4px 1fr;
  gap: 12px;
  align-items: baseline;
}
.feed-item:last-child { border-bottom: none; }
.feed-bar { width: 2px; height: 100%; background: var(--text-dim); align-self: stretch; }
.feed-item.grabber .feed-bar { background: var(--accent); }
.feed-item.suggest .feed-bar { background: var(--warn); }

.feed-ts {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 0.02em;
}
.feed-kind {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}
.feed-item.suggest .feed-kind { color: var(--warn); }
.feed-title {
  font-size: 12.5px;
  color: var(--text);
  margin-top: 2px;
}
.feed-meta {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ==========================================================================
   CHARTS
   ========================================================================== */

.chart-row {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 32px;
}
@media (max-width: 1200px) { .chart-row { grid-template-columns: 1fr; } }
.chart-box {
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 20px 22px 24px;
}
.chart-box canvas { max-height: 240px; }

/* ==========================================================================
   LOGIN
   ========================================================================== */

.login-screen {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.login-card {
  width: 100%;
  max-width: 420px;
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 36px 40px 40px;
}
.login-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 36px;
}
.login-mark {
  width: 36px; height: 36px;
  background: var(--accent);
  color: var(--bg);
  display: grid;
  place-items: center;
  font-size: 18px;
  font-weight: 700;
}
.login-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}
.login-sub {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.14em;
  color: var(--text-dim);
  text-transform: uppercase;
}
.login-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 8px;
}
.login-input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border-strong);
  color: var(--text);
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  outline: none;
  transition: border-color .15s ease;
}
.login-input:focus { border-color: var(--accent); }
.login-btn {
  margin-top: 22px;
  width: 100%;
  background: var(--accent);
  color: var(--bg);
  border: none;
  padding: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  transition: background .15s ease;
}
.login-btn:hover { background: #ffa05c; }
.login-error {
  margin-top: 16px;
  padding: 10px 14px;
  background: rgba(217, 122, 107, 0.1);
  border: 1px solid var(--danger);
  color: var(--danger);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
}

/* ==========================================================================
   UTILITIES
   ========================================================================== */

.bg-body { background: var(--bg); }
.text-primary { color: var(--text); }
.mt-3 { margin-top: 12px; }

/* Scrollbar (webkit) */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-strong); }
::-webkit-scrollbar-thumb:hover { background: var(--accent-dim); }