:root {
  --bg: #0b0f14;
  --card-bg: #121822;
  --panel-bg: #121822;
  --border: #232b38;
  --text: #e6edf5;
  --text-muted: #8a97a8;
  --accent: #3b82f6;
  --healthy: #10b981;
  --watch: #f59e0b;
  --critical: #ef4444;
  --offline: #64748b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { background: #1a2230; padding: 0.1rem 0.35rem; border-radius: 4px; font-size: 0.85em; }

/* Nav */
.sol-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  background: var(--panel-bg);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 0.75rem;
}
.sol-nav-brand { display: flex; align-items: center; gap: 0.5rem; font-weight: 700; font-size: 1.1rem; }
.sol-nav-sub { color: var(--text-muted); font-weight: 400; }
.sol-nav-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--healthy);
  box-shadow: 0 0 8px var(--healthy);
  display: inline-block;
}
.sol-nav-links { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.sol-nav-links a { color: var(--text-muted); font-weight: 500; }
.sol-nav-links a.active, .sol-nav-links a:hover { color: var(--text); }
.sol-nav-user { display: flex; align-items: center; gap: 0.6rem; font-size: 0.9rem; color: var(--text-muted); }

.sol-role-badge {
  font-size: 0.7rem; text-transform: uppercase; padding: 0.15rem 0.5rem;
  border-radius: 999px; letter-spacing: 0.03em; font-weight: 600;
}
.sol-role-admin { background: rgba(59,130,246,0.15); color: #60a5fa; }
.sol-role-user { background: rgba(148,163,184,0.15); color: #94a3b8; }

.sol-link-btn {
  background: none; border: none; color: var(--accent); cursor: pointer;
  font-size: 0.9rem; padding: 0; text-decoration: underline;
}
.sol-text-danger { color: var(--critical); }
.sol-text-muted { color: var(--text-muted); }
.sol-mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

/* Main / layout */
.sol-main { padding: 1.5rem; max-width: 1400px; margin: 0 auto; }
.sol-main-narrow { max-width: 640px; }
.sol-page-title { margin: 0 0 1rem; font-size: 1.4rem; }
.sol-empty { padding: 2rem; text-align: center; color: var(--text-muted); border: 1px dashed var(--border); border-radius: 10px; }

/* Login */
.sol-login-body {
  display: flex; align-items: center; justify-content: center; min-height: 100vh;
}
.sol-login-card {
  background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px;
  padding: 2rem; width: 100%; max-width: 360px;
}
.sol-login-brand { display: flex; align-items: center; gap: 0.5rem; font-weight: 700; font-size: 1.3rem; margin-bottom: 0.25rem; }
.sol-login-tagline { color: var(--text-muted); margin: 0 0 1.5rem; font-size: 0.9rem; }

/* Forms */
.sol-field { display: flex; flex-direction: column; gap: 0.3rem; margin-bottom: 1rem; font-size: 0.85rem; color: var(--text-muted); }
.sol-field input, .sol-field select {
  background: #0e141d; border: 1px solid var(--border); color: var(--text);
  border-radius: 6px; padding: 0.5rem 0.6rem; font-size: 0.95rem;
}
.sol-field-checkbox { flex-direction: row; align-items: center; gap: 0.5rem; }
.sol-field-wide { grid-column: 1 / -1; }
.sol-form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 0 1rem; align-items: end; }
.sol-form-grid > button { grid-column: 1 / -1; justify-self: start; margin-top: 0.25rem; }
.sol-inline-form { display: flex; gap: 0.5rem; align-items: center; margin: 0.75rem 0; flex-wrap: wrap; }
.sol-checkbox-list { display: flex; flex-direction: column; gap: 0.4rem; margin: 0.5rem 0 1rem; }

.sol-btn {
  background: #1a2230; border: 1px solid var(--border); color: var(--text);
  padding: 0.5rem 1rem; border-radius: 6px; cursor: pointer; font-size: 0.9rem;
}
.sol-btn:hover { background: #212b3b; }
.sol-btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.sol-btn-primary:hover { background: #2563eb; }
.sol-btn-block { width: 100%; }

.sol-alert { padding: 0.6rem 0.9rem; border-radius: 6px; margin-bottom: 1rem; font-size: 0.9rem; }
.sol-alert-error { background: rgba(239,68,68,0.12); color: #fca5a5; border: 1px solid rgba(239,68,68,0.3); }
.sol-alert-success { background: rgba(16,185,129,0.12); color: #6ee7b7; border: 1px solid rgba(16,185,129,0.3); }

/* Admin panels + tables */
.sol-panel { background: var(--panel-bg); border: 1px solid var(--border); border-radius: 10px; padding: 1.25rem; margin-bottom: 1.25rem; }
.sol-panel-title { margin: 0 0 1rem; font-size: 1.05rem; display: flex; align-items: center; gap: 0.6rem; }
.sol-panel-subtitle { font-size: 0.9rem; color: var(--text-muted); margin: 1rem 0 0.5rem; text-transform: uppercase; letter-spacing: 0.03em; }
.sol-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.sol-table th, .sol-table td { padding: 0.4rem 0.5rem; border-bottom: 1px solid var(--border); text-align: left; }
.sol-table input[type=text], .sol-table input[type=number] {
  background: #0e141d; border: 1px solid var(--border); color: var(--text);
  border-radius: 4px; padding: 0.3rem 0.4rem; font-size: 0.85rem; width: 100%;
}
.sol-input-wide { min-width: 220px; }

/* Device cards */
.sol-device-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}
.sol-device-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.1rem;
}
.sol-card-header { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.6rem; }
.sol-card-label { font-weight: 600; flex: 1; }
.sol-card-type {
  font-size: 0.7rem; text-transform: uppercase; color: var(--text-muted);
  border: 1px solid var(--border); padding: 0.1rem 0.5rem; border-radius: 999px;
}
.sol-status-dot { width: 9px; height: 9px; border-radius: 50%; flex-shrink: 0; }
.sol-status-dot.sol-healthy { background: var(--healthy); box-shadow: 0 0 6px var(--healthy); }
.sol-status-dot.sol-offline { background: var(--offline); }

.sol-big-row { display: flex; align-items: baseline; gap: 0.3rem; margin-bottom: 0.6rem; }
.sol-big-volt { font-size: 1.9rem; font-weight: 700; }
.sol-trend-arrow { font-size: 1rem; }
.sol-trend-arrow.sol-trend-up { color: var(--healthy); }
.sol-trend-arrow.sol-trend-down { color: var(--critical); }

.sol-stat-row { display: flex; justify-content: space-between; font-size: 0.85rem; padding: 0.2rem 0; color: var(--text-muted); }
.sol-stat-val { color: var(--text); font-weight: 500; }

.sol-state-charging { color: var(--healthy); }
.sol-state-discharging { color: var(--watch); }
.sol-state-idle { color: var(--offline); }

/* A distinct panel behind the graph so it visually reads as "a graph
   module", not just more text flowing into the rest of the card. */
.sol-graph-body {
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 0.6rem 0.4rem;
  margin: 0.4rem 0 0.5rem;
}

.sol-sparkline-wrap { margin: 0 0 0.3rem; }
.sol-spark { display: block; width: 100%; height: 70px; cursor: crosshair; }

.sol-spark-range { font-size: 0.72rem; color: var(--text-muted); display: flex; justify-content: space-between; }

.sol-metric-block { padding: 0.3rem 0; border-top: 1px solid var(--border); }
.sol-metric-block .sol-stat-row { padding: 0 0 0.15rem; }
.sol-metric-block .sol-graph-body { margin: 0.3rem 0 0.15rem; }
.sol-mini-sparkline-wrap { margin: 0 0 0.2rem; }
.sol-mini-spark { display: block; width: 100%; height: 32px; cursor: crosshair; }
.sol-spark-range-mini { font-size: 0.66rem; }

.sol-chart-tooltip {
  position: fixed; z-index: 1000; pointer-events: none;
  background: #0e141d; border: 1px solid var(--border); border-radius: 6px;
  padding: 0.35rem 0.55rem; font-size: 0.75rem; color: var(--text);
  box-shadow: 0 4px 12px rgba(0,0,0,0.35); display: none; white-space: nowrap;
}
.sol-chart-tooltip strong { color: #60a5fa; }

/* The metric's own name is the expand/collapse control - no separate
   "Graph" affordance, just a chevron in front of the label itself. */
.sol-metric-toggle {
  background: none; border: none; cursor: pointer; font: inherit;
  color: inherit; padding: 0; text-align: left;
}
.sol-metric-toggle:hover { color: var(--text); }
.sol-toggle-chevron { display: inline-block; width: 0.9em; color: var(--text-muted); }

.sol-primary-toggle {
  font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.03em;
  color: var(--text-muted); margin-bottom: 0.15rem; display: block;
}

.sol-stat-label-toggle { font-size: 0.85rem; color: var(--text-muted); }

.sol-poll-ts { font-size: 0.72rem; color: var(--text-muted); margin-top: 0.4rem; }