/* =============================================
   BASE
   ============================================= */

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Segoe UI', system-ui, sans-serif;
  min-height: 100vh;
  margin: 0;
}

/* =============================================
   HEADER
   ============================================= */

#app-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 24px;
  background-color: var(--bg-header);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-right: auto;
}

.brand-logo-icon {
  width: 36px;
  height: 18px;
  flex-shrink: 0;
  color: var(--accent-primary);
  transition: color 0.3s ease;
}

.brand-text-group {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.5px;
  line-height: 1.2;
}

.brand-slogan {
  font-size: 0.68rem;
  color: var(--text-muted);
  letter-spacing: 0.3px;
  line-height: 1.2;
}

#theme-swatches {
  display: flex;
  gap: 8px;
  align-items: center;
}

.theme-swatch {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  padding: 0;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.theme-swatch:hover {
  transform: scale(1.2);
  box-shadow: 0 0 6px rgba(255, 255, 255, 0.3);
}

#btn-add-device {
  padding: 6px 14px;
  background-color: var(--accent-primary);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s ease;
}

#btn-add-device:hover {
  opacity: 0.85;
}

/* =============================================
   EMPTY STATE
   ============================================= */

#empty-state {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 57px);
  padding: 40px 20px;
}

.empty-state-inner {
  text-align: center;
  max-width: 380px;
}

.empty-icon {
  font-size: 4rem;
  margin-bottom: 16px;
}

.empty-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.empty-subtitle {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 28px;
}

.btn-add-primary {
  padding: 12px 28px;
  background-color: var(--accent-primary);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s ease, transform 0.15s ease;
}

.btn-add-primary:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

/* =============================================
   WIDGET SECTION
   ============================================= */

#widget-section {
  padding: 20px 24px 8px;
  border-bottom: 1px solid var(--border);
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

#widget-grid-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

#widget-grid-header h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin: 0;
}

#btn-toggle-widgets {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 6px;
  padding: 2px 10px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

#btn-toggle-widgets:hover {
  background-color: var(--bg-card);
  color: var(--text-primary);
}

#widget-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 16px;
  padding-bottom: 16px;
}

/* =============================================
   WIDGET CARD
   ============================================= */

.widget-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 12px 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  position: relative;
  animation: cardAppear 0.3s ease-out;
  cursor: default;
  transition: box-shadow 0.15s ease;
}

.widget-card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}

.widget-circle-wrap {
  position: relative;
  width: 100px;
  height: 100px;
}

.widget-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 1.6rem;
  line-height: 1;
}

.battery-arc {
  stroke-dasharray: 283;
  stroke-dashoffset: 283;
  stroke-linecap: round;
  transform: rotate(-90deg);
  transform-origin: 50% 50%;
  transition: stroke 0.3s ease;
}

.widget-percent {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
}

.widget-name {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* =============================================
   DEVICE LIST SECTION
   ============================================= */

#list-section {
  padding: 0 24px 32px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

#device-list {
  width: 100%;
  border-collapse: collapse;
  margin-top: 8px;
}

#device-list thead th {
  padding: 10px 12px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  text-align: left;
}

.device-row {
  border-bottom: 1px solid var(--border);
  cursor: default;
}

.device-row:hover {
  background-color: var(--bg-card);
}

.device-row td {
  padding: 12px;
  vertical-align: middle;
}

.device-row .cell-icon {
  font-size: 1.3rem;
  width: 40px;
  text-align: center;
}

.device-row .cell-name {
  font-weight: 600;
  color: var(--text-primary);
  min-width: 120px;
}

.device-row .cell-name .name-text {
  cursor: pointer;
  border-bottom: 1px dashed transparent;
  transition: border-color 0.15s;
}

.device-row .cell-name .name-text:hover {
  border-color: var(--text-muted);
}

.device-row .cell-name input.name-input {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-primary);
  padding: 2px 6px;
  font-size: inherit;
  font-family: inherit;
  width: 100%;
  outline: none;
}

.name-original-hint {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 2px;
  font-weight: 400;
}

.btn-restore {
  background: none;
  border: none;
  color: var(--accent-primary);
  font-size: 0.72rem;
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
}

.btn-restore:hover {
  opacity: 0.75;
}

.device-row .cell-status {
  width: 120px;
}

.device-row .cell-lastseen {
  color: var(--text-muted);
  font-size: 0.85rem;
  white-space: nowrap;
  width: 120px;
}

.device-row .cell-battery {
  min-width: 160px;
}

.battery-bar-track {
  background-color: var(--border);
  border-radius: 4px;
  height: 8px;
  overflow: hidden;
}

.battery-bar-fill {
  height: 100%;
  border-radius: 4px;
  width: 0%;
  transition: width 1s ease-out;
}

.battery-unsupported {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-style: italic;
}

.battery-pct-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 3px;
}

.device-row .cell-trash {
  width: 40px;
  text-align: center;
}

.btn-trash {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  color: var(--text-muted);
  padding: 4px 8px;
  border-radius: 4px;
  opacity: 0;
  transition: opacity 0.15s ease, color 0.15s ease;
}

.device-row:hover .btn-trash {
  opacity: 1;
}

.btn-trash:hover {
  color: var(--accent-red);
}

/* =============================================
   RESPONSIVE — card stack below 600px
   ============================================= */

@media (max-width: 600px) {
  #list-section {
    padding: 0 12px 24px;
  }

  #device-list thead {
    display: none;
  }

  #device-list,
  #device-list tbody,
  .device-row {
    display: block;
    width: 100%;
  }

  .device-row {
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 12px;
    padding: 12px;
  }

  .device-row td {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
    border: none;
  }

  .device-row td[data-label]::before {
    content: attr(data-label);
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: var(--text-muted);
    flex-shrink: 0;
    margin-right: 12px;
  }

  .device-row .cell-icon {
    justify-content: flex-start;
    width: auto;
    font-size: 1.5rem;
  }

  .device-row .cell-battery {
    min-width: unset;
  }

  .device-row .cell-battery > div {
    flex: 1;
  }

  .device-row .cell-trash {
    justify-content: flex-end;
    width: auto;
  }

  .btn-trash {
    opacity: 1;
  }

  #widget-section {
    padding: 16px 12px 8px;
  }
}

/* =============================================
   ANIMATIONS
   ============================================= */

@keyframes fillArc {
  to { stroke-dashoffset: var(--target-offset); }
}

.battery-arc {
  animation: fillArc 1s ease-out forwards;
}

@keyframes pulseGlow {
  0%, 100% { filter: drop-shadow(0 0 0px var(--accent-red)); }
  50%       { filter: drop-shadow(0 0 10px var(--accent-red)); }
}

.low-battery .battery-arc {
  animation: fillArc 1s ease-out forwards,
             pulseGlow 1.5s ease-in-out infinite 1s;
}

@keyframes cardAppear {
  from { opacity: 0; transform: scale(0.8); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes slideUp {
  from { opacity: 1; max-height: 400px; }
  to   { opacity: 0; max-height: 0; }
}

/* =============================================
   CONNECTING / ERROR STATES
   ============================================= */

.connecting-indicator {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 6px 14px;
  animation: pulse 1s ease-in-out infinite alternate;
}

@keyframes pulse {
  from { opacity: 0.5; }
  to   { opacity: 1; }
}

.error-card {
  background-color: var(--bg-card);
  border: 1px solid var(--accent-red);
  border-radius: 14px;
  padding: 20px 12px 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--accent-red);
  font-size: 0.85rem;
  font-weight: 600;
  text-align: center;
  animation: cardAppear 0.3s ease-out;
}