:root {
  color-scheme: light dark;
  --bg: #0f1720;
  --panel: #1a2532;
  --text: #e6edf3;
  --muted: #8b98a5;
  --accent: #4fa3ff;
  --warn: #e5484d;
}

* { box-sizing: border-box; }

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

header {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid #2a3644;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header-logo {
  height: 32px;
  width: auto;
}

header h1 {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 600;
}

header .banner {
  flex-basis: 100%;
}

nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

nav a {
  color: var(--text);
  text-decoration: none;
  font-size: 0.9rem;
}

nav a:hover { color: var(--accent); }

nav a.hidden { display: none; }

nav button {
  background: transparent;
  border: 1px solid #3a4a5c;
  color: var(--text);
  border-radius: 6px;
  padding: 0.4rem 0.8rem;
  cursor: pointer;
  font-size: 0.85rem;
}

nav button:hover { border-color: var(--accent); }

#batteryPanel.hidden, #directionPanel.hidden { display: none; }

.banner {
  padding: 0.6rem 1rem;
  border-radius: 6px;
  background: var(--warn);
  color: white;
  font-weight: 600;
}

.banner.hidden { display: none; }

main {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1rem;
  padding: 1rem 1.5rem;
}

.panel {
  background: var(--panel);
  border-radius: 10px;
  padding: 1rem;
}

.panel h2 {
  margin: 0 0 0.75rem 0;
  font-size: 0.95rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.map-panel { grid-column: span 2; }

#map {
  height: 360px;
  border-radius: 8px;
}

.info-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-top: 0.75rem;
  font-size: 0.9rem;
}

.info-row .stat b {
  display: block;
  font-size: 1.1rem;
  color: var(--accent);
}

.info-row .stat span {
  color: var(--muted);
  font-size: 0.75rem;
}

@media (max-width: 800px) {
  .map-panel { grid-column: span 1; }
}

/* Login page */

.login-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-card {
  background: var(--panel);
  border-radius: 12px;
  padding: 2rem;
  width: 320px;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  text-align: center;
}

.login-logo {
  height: 56px;
  margin: 0 auto 0.5rem;
}

.login-card h1 {
  font-size: 1.05rem;
  margin: 0;
}

.login-subtitle {
  margin: 0 0 0.5rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.login-card label {
  text-align: left;
  font-size: 0.85rem;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.login-card input,
.stacked-form input,
.stacked-form select {
  background: #0f1720;
  border: 1px solid #3a4a5c;
  color: var(--text);
  border-radius: 6px;
  padding: 0.5rem 0.6rem;
  font-size: 0.9rem;
}

.login-card button,
.stacked-form button {
  background: var(--accent);
  color: #05131f;
  border: none;
  border-radius: 6px;
  padding: 0.6rem;
  font-weight: 600;
  cursor: pointer;
}

.login-error {
  color: var(--warn);
  font-size: 0.85rem;
}

.login-error.hidden { display: none; }

/* Admin / forms */

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.data-table th, .data-table td {
  text-align: left;
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid #2a3644;
}

.data-table button {
  background: transparent;
  border: 1px solid var(--warn);
  color: var(--warn);
  border-radius: 6px;
  padding: 0.3rem 0.6rem;
  cursor: pointer;
  font-size: 0.8rem;
}

.stacked-form {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  max-width: 420px;
}

.stacked-form label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.stacked-form fieldset {
  border: 1px solid #2a3644;
  border-radius: 8px;
  padding: 0.75rem;
}

.stacked-form legend {
  font-size: 0.8rem;
  color: var(--muted);
}

.checkbox {
  flex-direction: row !important;
  align-items: center;
  gap: 0.5rem !important;
  font-size: 0.9rem !important;
  color: var(--text) !important;
}

/* Export page */

.stacked-form.stacked-form { max-width: none; }

.date-row {
  display: flex;
  gap: 1.5rem;
}

.date-row label { max-width: 220px; }

.columns-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.columns-container fieldset {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.export-actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.secondary-btn {
  background: transparent !important;
  border: 1px solid #3a4a5c;
  color: var(--text) !important;
  border-radius: 6px;
  padding: 0.5rem 0.9rem;
  cursor: pointer;
  font-weight: 500 !important;
}

.secondary-btn:hover { border-color: var(--accent); }