:root {
  --bg-primary: #f0f4f8;
  --bg-secondary: #e4e9f0;
  --bg-card: #ffffff;
  --bg-card-alt: #f8fafc;
  --border: #d0d8e4;
  --border-hover: #a0b0c8;
  --text-primary: #0a1a3a;
  --text-secondary: #4a5a7a;
  --text-muted: #8a9ab0;
  --accent: #1a3a6a;
  --accent-glow: rgba(26, 58, 106, 0.08);
  --green: #16a34a;
  --green-dim: rgba(22, 163, 74, 0.12);
  --amber: #d97706;
  --amber-dim: rgba(217, 119, 6, 0.12);
  --red: #dc2626;
  --red-dim: rgba(220, 38, 38, 0.12);
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  --transition: 0.25s ease;
  --font: -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

input, select, button {
  font-family: inherit;
  font-size: inherit;
}

.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* HEADER */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.header-left {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.header-logo {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  object-fit: contain;
  flex-shrink: 0;
}

.header-brand {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.header-brand .brand-name {
  font-size: 11px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.header-brand h1 {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-primary);
  margin: 0;
}

.header-left .subtitle {
  font-size: 12px;
  color: var(--text-muted);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mode-toggle {
  display: flex;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.mode-btn {
  padding: 5px 14px;
  font-size: 12px;
  font-weight: 600;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.2px;
}

.mode-btn:hover {
  color: var(--text-secondary);
}

.mode-btn.active {
  background: var(--accent-glow);
  color: var(--accent);
}

/* PANELS */
.panels {
  display: flex;
  gap: 16px;
  flex: 1;
  overflow: hidden;
  padding: 16px 24px;
}

.panel-left {
  flex: 0 0 54%;
  overflow-y: auto;
  padding-right: 8px;
}

.panel-right {
  flex: 1;
  overflow-y: auto;
  padding-left: 8px;
}

.panel-left::-webkit-scrollbar,
.panel-right::-webkit-scrollbar {
  width: 4px;
}

.panel-left::-webkit-scrollbar-track,
.panel-right::-webkit-scrollbar-track {
  background: transparent;
}

.panel-left::-webkit-scrollbar-thumb,
.panel-right::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

/* CARDS */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-bottom: 12px;
  box-shadow: var(--shadow);
  transition: border-color var(--transition);
}

.card:hover {
  border-color: var(--border-hover);
}

.card h2 {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.card h3 {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

/* PRESET BUTTONS */
.preset-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-bottom: 10px;
}

.preset-btn {
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
}

.preset-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

.preset-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

/* FORM FIELDS */
.fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 12px;
}

.fields label {
  display: flex;
  flex-direction: column;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.3px;
  gap: 3px;
}

.fields input,
.fields select {
  width: 100%;
  padding: 6px 8px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 13px;
  transition: border-color var(--transition);
  outline: none;
}

.fields input:focus,
.fields select:focus {
  border-color: var(--accent);
}

.fields input[type="number"] {
  -moz-appearance: textfield;
}

.fields input::-webkit-outer-spin-button,
.fields input::-webkit-inner-spin-button {
  -webkit-appearance: none;
}

/* UPS INFO */
.ups-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 10px;
  padding: 8px 12px;
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  font-size: 12px;
}

.ups-info span {
  color: var(--text-muted);
}

.ups-info strong {
  color: var(--accent);
  font-size: 15px;
}

/* BATTERY TYPES */
.battery-types {
  display: flex;
  gap: 12px;
  margin-top: 10px;
}

.radio-label {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
}

.radio-label input[type="radio"] {
  accent-color: var(--accent);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
  cursor: pointer;
  margin-top: 8px;
}

.checkbox-label input[type="checkbox"] {
  accent-color: var(--amber);
}

/* SEARCH BAR */
.search-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
}

.search-bar input {
  flex: 1;
  padding: 6px 10px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 12px;
  outline: none;
  transition: border-color var(--transition);
}

.search-bar input:focus {
  border-color: var(--accent);
}

.search-bar select {
  padding: 6px 10px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 12px;
  outline: none;
  cursor: pointer;
}

.search-bar select:focus {
  border-color: var(--accent);
}

/* DEVICE LIST */
.device-list {
  max-height: 200px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
}

.device-list::-webkit-scrollbar {
  width: 4px;
}

.device-list::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

.device-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.device-item:last-child {
  border-bottom: none;
}

.device-item:hover {
  background: var(--bg-card-alt);
}

.device-name {
  font-size: 12px;
  color: var(--text-primary);
  flex: 1;
}

.device-category {
  font-size: 10px;
  color: var(--text-muted);
  margin: 0 8px;
}

.device-watts {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-right: 8px;
  white-space: nowrap;
}

.add-btn {
  width: 24px;
  height: 24px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: transparent;
  color: var(--accent);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  line-height: 1;
}

.add-btn:hover {
  background: var(--accent-glow);
  border-color: var(--accent);
}

/* SELECTED LOADS */
.selected-loads {
  margin-top: 12px;
}

.loads-container {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.load-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  gap: 8px;
}

.load-info {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 0;
}

.load-name {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.load-watts {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  white-space: nowrap;
}

.load-controls {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.load-controls label {
  display: flex;
  align-items: center;
  gap: 3px;
  font-size: 10px;
  color: var(--text-muted);
  white-space: nowrap;
}

.load-controls input {
  width: 36px;
  padding: 3px 4px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-primary);
  font-size: 12px;
  text-align: center;
  outline: none;
}

.load-controls input:focus {
  border-color: var(--accent);
}

.remove-btn {
  width: 22px;
  height: 22px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: transparent;
  color: var(--text-muted);
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.remove-btn:hover {
  border-color: var(--red);
  color: var(--red);
  background: var(--red-dim);
}

.empty-state {
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
  padding: 20px;
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
}

/* GAUGE */
.gauge-card {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.gauge-container {
  position: relative;
  width: 160px;
  height: 160px;
  margin: 0 auto;
}

.gauge-container svg {
  width: 100%;
  height: 100%;
  display: block;
}

.gauge-bg {
  fill: none;
  stroke: var(--border);
  stroke-width: 10;
}

.gauge-fill {
  fill: none;
  stroke: var(--green);
  stroke-width: 10;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.6s ease, stroke 0.4s ease;
}

.gauge-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.gauge-value {
  display: block;
  font-size: 32px;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
}

.gauge-label {
  display: block;
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 2px;
}

/* AUTONOMY */
.autonomy-card {
  text-align: center;
}

.autonomy-display {
  padding: 8px 0;
}

.autonomy-time {
  font-size: 36px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.5px;
}

.autonomy-sub {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* STATS */
.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.stat {
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat-label {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-value {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

/* BAR */
.bar-container {
  height: 10px;
  background: var(--bg-primary);
  border-radius: 5px;
  overflow: hidden;
  margin-top: 4px;
}

.bar-fill {
  height: 100%;
  border-radius: 5px;
  transition: width 0.5s ease, background 0.4s ease;
  min-width: 0;
}

.bar-label {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* WARNINGS */
.warnings-container {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.warning-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 500;
}

.warning-ok {
  background: var(--green-dim);
  color: var(--green);
  border: 1px solid rgba(0, 230, 118, 0.2);
}

.warning-warning {
  background: var(--amber-dim);
  color: var(--amber);
  border: 1px solid rgba(255, 171, 0, 0.2);
}

.warning-danger {
  background: var(--red-dim);
  color: var(--red);
  border: 1px solid rgba(255, 23, 68, 0.2);
}

/* ANIMATIONS */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.card {
  animation: fadeIn 0.3s ease;
}

/* RESPONSIVE */
@media (max-width: 1100px) {
  .panels {
    padding: 12px 16px;
    gap: 12px;
  }

  .panel-left {
    flex: 0 0 50%;
  }

  .fields {
    grid-template-columns: 1fr;
  }

  .gauge-container {
    width: 140px;
    height: 140px;
  }

  .autonomy-time {
    font-size: 28px;
  }

  .stat-value {
    font-size: 15px;
  }
}

@media (max-width: 900px) {
  body {
    overflow: auto;
  }

  .app {
    height: auto;
    min-height: 100vh;
    overflow: visible;
  }

  .panels {
    flex-direction: column;
    overflow: visible;
  }

  .panel-left,
  .panel-right {
    flex: none;
    overflow: visible;
    padding: 0;
  }

  .header {
    padding: 10px 16px;
    flex-wrap: wrap;
    gap: 8px;
  }

  .header-left .subtitle {
    display: none;
  }

  .gauge-container {
    width: 130px;
    height: 130px;
  }

  .autonomy-time {
    font-size: 26px;
  }
}

@media (max-width: 480px) {
  .panels {
    padding: 8px 10px;
  }

  .card {
    padding: 12px;
  }

  .preset-buttons {
    gap: 4px;
  }

  .preset-btn {
    font-size: 10px;
    padding: 3px 7px;
  }

  .load-item {
    flex-wrap: wrap;
  }

  .load-controls {
    flex-wrap: wrap;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 6px;
  }

  .battery-types {
    flex-direction: column;
    gap: 6px;
  }
}