/* ===== CSS Variables & Theme ===== */
:root {
  --bg-primary: #0f1117;
  --bg-secondary: #1a1d27;
  --bg-tertiary: #242836;
  --bg-card: #1e2230;
  --bg-card-hover: #252a3a;
  --bg-input: #181b25;
  --border: #2d3348;
  --border-light: #363c52;
  --text-primary: #e4e6f0;
  --text-secondary: #8b8fa8;
  --text-muted: #d9dce9;
  --accent: #6c5ce7;
  --accent-hover: #7c6ef7;
  --accent-glow: rgba(108, 92, 231, 0.3);
  --success: #00d68f;
  --success-bg: rgba(0, 214, 143, 0.12);
  --warning: #ffaa00;
  --warning-bg: rgba(255, 170, 0, 0.12);
  --danger: #ff4757;
  --danger-bg: rgba(255, 71, 87, 0.12);
  --info: #1e90ff;
  --info-bg: rgba(30, 144, 255, 0.12);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 6px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.4);
  --transition: 0.2s ease;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }
input, select, textarea, button { font-family: inherit; font-size: inherit; }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-light); }

/* ===== Utilities ===== */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 20px; border: none; border-radius: var(--radius-sm);
  cursor: pointer; font-weight: 600; transition: all var(--transition);
  background: var(--bg-tertiary); color: var(--text-primary);
}
.btn:hover { background: var(--border); transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); box-shadow: 0 4px 16px var(--accent-glow); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: 0.9; }
.btn-full { width: 100%; justify-content: center; padding: 12px; }
.btn-sm { padding: 6px 14px; font-size: 0.87rem; }
.btn-icon { background: none; padding: 8px; border-radius: 50%; color: var(--text-secondary); }
.btn-icon:hover { background: var(--bg-tertiary); color: var(--text-primary); }

/* Control mode button styling */
.control-mode-btn { margin-right: 4px; }
/* default: locked = white icon */
.control-mode-icon { filter: invert(1) brightness(1.2) contrast(1.05); }
/* enabled: unlocked = green icon */
.control-mode-btn.control-enabled .control-mode-icon { filter: invert(35%) sepia(100%) saturate(600%) hue-rotate(80deg) brightness(0.95) contrast(1.05); }

.form-group { margin-bottom: 16px; }
.form-group label {
  display: block; margin-bottom: 6px;
  color: var(--text-secondary); font-size: 0.87rem; font-weight: 500;
}
.form-group input, .form-group select {
  width: 100%; padding: 10px 14px;
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-primary);
  transition: border-color var(--transition);
}
.form-group input:focus, .form-group select:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-error { color: var(--danger); font-size: 0.87rem; margin-bottom: 12px; min-height: 1.2em; }
.form-actions { display: flex; gap: 12px; margin-top: 20px; }

.search-input {
  padding: 8px 14px; background: var(--bg-tertiary); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-primary); width: 220px;
}
.search-input:focus { outline: none; border-color: var(--accent); }
.select-input {
  padding: 8px 12px; background: var(--bg-tertiary); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-primary);
}
.select-sm { padding: 4px 8px; font-size: 0.8rem; }

/* ===== Spinner ===== */
.spinner {
  width: 36px; height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loading-placeholder {
  display: flex; flex-direction: column; align-items: center;
  gap: 16px; padding: 60px 20px; color: var(--text-muted);
}

/* ===== Auth Screen ===== */
.auth-screen {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: radial-gradient(ellipse at 50% 0%, rgba(108,92,231,0.15) 0%, transparent 60%), var(--bg-primary);
}
.auth-container { width: 100%; max-width: 420px; padding: 20px; }
.auth-header { text-align: center; margin-bottom: 40px; }
.logo { display: flex; align-items: center; justify-content: center; gap: 12px; margin-bottom: 12px; }
.logo-icon { width: 44px; height: 44px; }
.logo h1 { font-size: 1.6rem; font-weight: 700; }
.auth-subtitle { color: var(--text-secondary); }
.auth-form {
  background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px;
  box-shadow: var(--shadow-lg);
}
.auth-form h2 { margin-bottom: 24px; font-size: 1.3rem; }
.auth-switch { text-align: center; margin-top: 20px; color: var(--text-secondary); font-size: 0.93rem; }

/* ===== Top Nav ===== */
.topnav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px; height: 60px;
  background: var(--bg-secondary); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
}
.topnav-left { display: flex; align-items: center; gap: 10px; }
.logo-icon-sm { width: 28px; height: 28px; }
.topnav-title { font-weight: 700; font-size: 1.05rem; }
.topnav-right { display: flex; align-items: center; gap: 12px; }
.topnav-device-filters {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.topnav-device-filters .search-input { width: 260px; }
.user-display { color: var(--text-secondary); font-size: 0.9rem; }

/* Connection status */
.conn-status {
  display: flex; align-items: center; gap: 6px; font-size: 0.8rem;
  padding: 4px 10px; border-radius: 20px; background: var(--bg-tertiary);
}
.conn-dot { width: 8px; height: 8px; border-radius: 50%; }
.conn-connecting .conn-dot { background: var(--warning); animation: pulse 1.5s infinite; }
.conn-connected .conn-dot { background: var(--success); }
.conn-disconnected .conn-dot { background: var(--danger); }
.conn-connecting .conn-text { color: var(--warning); }
.conn-connected .conn-text { color: var(--success); }
.conn-disconnected .conn-text { color: var(--danger); }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

/* Offline badge */
.offline-badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 10px; border-radius: 20px;
  background: var(--danger-bg); color: var(--danger);
  font-size: 0.8rem; font-weight: 600;
}

/* Poll timer */
.poll-timer {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 0.75rem; color: var(--text-muted);
  padding: 4px 8px; border-radius: 20px; background: var(--bg-tertiary);
}

/* Refresh button spin animation */
.btn-icon.refreshing svg {
  animation: spin 0.8s linear infinite;
}

/* ===== Main Content ===== */
.main-content { padding: 24px; max-width: 1800px; margin: 0 auto; }

/* Banner */
.banner {
  display: flex; align-items: center; gap: 16px;
  padding: 16px 20px; border-radius: var(--radius);
  margin-bottom: 24px;
}
.banner-info { background: var(--info-bg); border: 1px solid rgba(30,144,255,0.3); }
.banner svg { flex-shrink: 0; color: var(--info); }
.banner p { color: var(--text-secondary); font-size: 0.9rem; margin-top: 4px; }

/* ===== Stats Row ===== */
.stats-row { display: none; }
.stat-card {
  display: flex; align-items: center; gap: 16px;
  padding: 20px; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: var(--radius);
  transition: all var(--transition);
}
.stat-card:hover { border-color: var(--border-light); transform: translateY(-2px); box-shadow: var(--shadow); }
.stat-icon {
  width: 52px; height: 52px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
}
.stat-icon-devices { background: rgba(108,92,231,0.15); color: var(--accent); }
.stat-icon-online { background: var(--success-bg); color: var(--success); }
.stat-icon-offline { background: var(--danger-bg); color: var(--danger); }
.stat-icon-categories { background: var(--warning-bg); color: var(--warning); }
.stat-value { display: block; font-size: 1.8rem; font-weight: 700; line-height: 1.2; }
.stat-label { color: var(--text-secondary); font-size: 0.85rem; }

/* ===== Section Header ===== */
.section-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px; flex-wrap: wrap; gap: 12px;
}
.section-header h2 { font-size: 1.2rem; }
.section-actions { display: flex; gap: 10px; align-items: center; }

/* ===== Device Grid ===== */
.devices-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(420px, 1fr));
  gap: 16px;
}
.device-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
  transition: all var(--transition);
  position: relative; overflow: hidden;
}
.device-card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
/* Device icon styling */
.device-icon { width: 48px; height: 48px; margin-right: 12px; flex-shrink: 0; display: inline-block; }
.device-card-header h3 { margin: 0; font-size: 1.05rem; }
.lucide-icon { width: 16px; height: 16px; display: inline-block; }

/* Ensure lucide icons (SVG) are visible on dark backgrounds */
.lucide-icon { filter: invert(1) brightness(1.4) contrast(1.05); }

/* Make SVG device icons (from Tuya) brighter when they are SVGs so they don't look dark on dark theme */
img.device-icon[src$=".svg"] { filter: invert(1) brightness(1.3) contrast(1.05); }

/* Per-card info collapse (separate from expanded stats/params) */
.device-card-info {
  display: none; margin-top: 10px; padding: 12px; background: var(--bg-tertiary);
  border-radius: var(--radius-xs); border: 1px solid var(--border);
  color: var(--text-primary); font-size: 0.9rem;
}
.device-card-info.open { display: block; }
.device-card-info .info-grid { grid-template-columns: 1fr; gap:8px; }
.device-card:hover {
  border-color: var(--accent);
  box-shadow: 0 8px 30px rgba(108,92,231,0.15);
}
.device-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--accent); opacity: 0; transition: opacity var(--transition);
}
.device-card:hover::before { opacity: 1; }
.device-card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.device-card-name { font-weight: 600; font-size: 1.25rem; }
.device-badge {
  padding: 3px 10px; border-radius: 20px; font-size: 0.75rem; font-weight: 600; text-transform: uppercase;
}
.badge-online { background: var(--success-bg); color: var(--success); }
.badge-offline { background: var(--danger-bg); color: var(--danger); }
.device-card-category { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 12px; }
.device-card-status { display: flex; flex-wrap: wrap; gap: 8px; }
.status-chip {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 4px 10px; background: var(--bg-tertiary);
  border-radius: var(--radius-xs); font-size: 0.8rem;
}
.status-chip-label { color: var(--text-muted); }
.status-chip-value { color: var(--text-primary); font-weight: 500; }
.device-last-update {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 6px;
  font-style: italic;
}
.device-card-id { color: var(--text-muted); font-size: 0.75rem; margin-top: 10px; font-family: monospace; }

/* Device card expanded content */
.device-card-header { cursor: pointer; }
.device-card-expand {
  display: flex; align-items: center; justify-content: center;
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--bg-tertiary); color: var(--text-muted);
  cursor: pointer; transition: all var(--transition); flex-shrink: 0;
  border:1px solid var(--border);
}
/* Tight header layout utilities (replaces inline styles) */
.device-card-header-tight { display:grid; grid-template-columns:auto minmax(0, 1fr); gap:8px 10px; align-items:stretch; }
.device-card-left { display:flex; align-items:center; gap:12px; flex:1; min-width:0; overflow:hidden; }
.device-card-left-tall { grid-row: 1 / span 2; align-self:stretch; }
.device-card-left-tall .device-icon { width:52px; height:52px; margin-right:0; align-self:center; }
.device-card-right { display:flex; flex-direction:column; min-width:0; gap:6px; }
.device-card-title-wrap { min-width:0; overflow:hidden; }
.device-card-name.ellipsis { display:block; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.device-card-name.device-card-name-wide {
  display:block;
  white-space:normal;
  overflow:visible;
  text-overflow:unset;
  line-height:1.25;
  word-break:break-word;
}
.device-card-category.truncate { white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.device-card-category-inline { margin: 2px 0 0 0; }
.device-card-actions { display:flex; align-items:center; gap:6px; justify-content:flex-end; flex-wrap:nowrap; }
.btn-icon-tight { padding:6px; }

/* Drag and drop styles */
.device-card { cursor: default; }
.device-card:active { cursor: default; }
.device-card.dragging {
  opacity: 0.5;
  transform: scale(0.95);
}
.device-card.drag-over {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(108,92,231,0.35);
}
.drag-handle {
  cursor: grab;
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 0 4px;
  user-select: none;
  line-height: 1;
  transform: rotate(90deg);
  display: inline-block;
}
.drag-handle:hover {
  color: var(--text-primary);
}
.drag-handle:active {
  cursor: grabbing;
}

.device-card-expand:hover { background: var(--border); color: var(--text-primary); }
.device-card-expand.expanded { transform: rotate(180deg); }
.device-card-body { display: none; margin-top: 16px; }
.device-card-body.open { display: block; }
.device-card-controls { margin-top: 12px; }
.device-card .device-card-controls { display: none; }
.device-card.controls-on .device-card-controls { display: block; }
.device-card-params { margin-top: 12px; }

/* ===== Slide Panel ===== */
.slide-panel {
  position: fixed; top: 0; right: -600px; width: 580px; max-width: 100vw;
  height: 100vh; background: var(--bg-secondary);
  border-left: 1px solid var(--border);
  z-index: 200; transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: -8px 0 40px rgba(0,0,0,0.4);
  display: flex; flex-direction: column;
}
.slide-panel.open { right: 0; }
.panel-header {
  display: flex; align-items: center; gap: 12px;
  padding: 16px 20px; border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.panel-header h3 { flex: 1; font-size: 1.1rem; }
.panel-body { flex: 1; overflow-y: auto; padding: 20px; }
.panel-section { margin-bottom: 28px; }
.panel-section h4 {
  font-size: 0.95rem; color: var(--text-secondary);
  margin-bottom: 12px; display: flex; align-items: center; gap: 10px;
}

/* Info grid */
.info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.info-item { padding: 8px 12px; background: var(--bg-tertiary); border-radius: var(--radius-xs); }
.info-item-label { font-size: 0.75rem; color: var(--text-muted); display: block; }
.info-item-value { font-size: 0.9rem; font-weight: 500; word-break: break-all; }

/* Controls */
.controls-grid { display: flex; flex-direction: column; gap: 12px; }
.control-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; background: var(--bg-tertiary);
  border-radius: var(--radius-sm); border: 1px solid var(--border);
}
.control-label { font-size: 0.9rem; font-weight: 500; }
.control-desc { font-size: 0.75rem; color: var(--text-muted); }

/* Toggle switch */
.toggle { position: relative; width: 48px; height: 26px; cursor: pointer; }
.toggle input { display: none; }
.toggle-slider {
  position: absolute; inset: 0; background: var(--border);
  border-radius: 13px; transition: background var(--transition);
}
.toggle-slider::before {
  content: ''; position: absolute; left: 3px; top: 3px;
  width: 20px; height: 20px; background: white;
  border-radius: 50%; transition: transform var(--transition);
}
.toggle input:checked + .toggle-slider { background: var(--accent); }
.toggle input:checked + .toggle-slider::before { transform: translateX(22px); }

/* Slider control */
.control-slider {
  width: 120px; accent-color: var(--accent);
  -webkit-appearance: none; appearance: none;
  height: 6px; background: var(--border); border-radius: 3px;
}
.control-slider::-webkit-slider-thumb {
  -webkit-appearance: none; width: 18px; height: 18px;
  background: var(--accent); border-radius: 50%; cursor: pointer;
}
.control-value { min-width: 40px; text-align: right; font-size: 0.85rem; color: var(--text-secondary); }

/* Enum select */
.control-select {
  padding: 6px 10px; background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius-xs); color: var(--text-primary);
}

/* Params list */
.params-list { display: flex; flex-direction: column; gap: 6px; }
.param-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 8px 12px; background: var(--bg-tertiary);
  border-radius: var(--radius-xs); font-size: 0.9rem;
}
.param-row.param-phase { background: linear-gradient(90deg, rgba(108,92,231,0.10) 0%, var(--bg-tertiary) 100%); }
.param-row.param-phase .param-value { color: var(--accent); font-family: monospace; }
.param-code { color: var(--text-secondary); font-family: monospace; font-size: 0.82rem; }
.param-value { font-weight: 500; }

/* Charts */
.charts-container { display: flex; flex-direction: column; gap: 16px; }
.chart-wrapper {
  background: var(--bg-tertiary); border-radius: var(--radius-sm);
  padding: 12px; border: 1px solid var(--border);
}
.chart-wrapper canvas { width: 100% !important; max-height: 200px; }
.chart-wrapper-lg { padding: 16px; }
.chart-wrapper-lg canvas { max-height: 320px; }
.chart-title { font-size: 0.82rem; color: var(--text-muted); margin-bottom: 8px; }
.chart-range-toolbar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  margin-bottom: 8px;
}
.chart-range-toolbar label {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* Device inline charts section */
.device-charts-section {
  margin-top: 16px; padding-top: 16px;
  border-top: 1px solid var(--border);
}
.device-charts-section .chart-wrapper { margin-bottom: 8px; }
.device-charts-section .chart-wrapper canvas { max-height: 160px; }
.device-charts-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 8px;
}

.device-power-hourly-section {
  margin-top: 4px;
}
.device-power-hourly-chart .chart-wrapper {
  margin-bottom: 0;
}
.device-power-hourly-chart .chart-wrapper canvas {
  max-height: 180px;
}

/* Energy overview */
.energy-overview-section { margin-top: 32px; }
.energy-overview-section .section-header { margin-bottom: 12px; }

/* Logs */
.logs-list { max-height: 300px; overflow-y: auto; }
.log-entry {
  display: flex; gap: 12px; padding: 8px 0;
  border-bottom: 1px solid var(--border); font-size: 0.85rem;
}
.log-time { color: var(--text-muted); white-space: nowrap; min-width: 140px; }
.log-code { color: var(--accent); font-family: monospace; min-width: 120px; }
.log-value { color: var(--text-primary); word-break: break-all; }

/* ===== Modal ===== */
.modal { position: fixed; inset: 0; z-index: 300; display: flex; align-items: center; justify-content: center; }
.modal-overlay { position: absolute; inset: 0; background: rgba(0,0,0,0.6); backdrop-filter: blur(4px); }
.modal-content {
  position: relative; background: var(--bg-secondary);
  border: 1px solid var(--border); border-radius: var(--radius);
  width: 100%; max-width: 500px; max-height: 90vh; overflow-y: auto;
  box-shadow: var(--shadow-lg); animation: modalIn 0.25s ease;
}
@keyframes modalIn { from { opacity: 0; transform: scale(0.95) translateY(10px); } }
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px; border-bottom: 1px solid var(--border);
}
.modal-body { padding: 24px; }

/* ===== Toast ===== */
.toast-container {
  position: fixed; bottom: 24px; right: 24px; z-index: 400;
  display: flex; flex-direction: column; gap: 8px;
}
.toast {
  padding: 12px 20px; border-radius: var(--radius-sm);
  font-size: 0.9rem; animation: toastIn 0.3s ease;
  box-shadow: var(--shadow); max-width: 360px;
}
.toast-success { background: var(--success); color: #fff; }
.toast-error { background: var(--danger); color: #fff; }
.toast-info { background: var(--info); color: #fff; }
@keyframes toastIn { from { opacity: 0; transform: translateX(30px); } }

/* ===== Empty State ===== */
.empty-state {
  text-align: center; padding: 60px 20px; color: var(--text-muted);
  grid-column: 1 / -1;
}
.empty-state svg { margin-bottom: 16px; opacity: 0.4; }
.empty-state p { font-size: 1.05rem; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .devices-grid { grid-template-columns: 1fr; }
  .slide-panel { width: 100vw; }
  .section-actions { width: 100%; }
  .search-input { width: 100%; }
  .topnav { padding: 0 12px; }
  .topnav-device-filters { display: none; }
  .main-content { padding: 16px; }
  .info-grid { grid-template-columns: 1fr; }
}