/* ============================================
   Submetering Monitor — Premium Dark Theme
   ============================================ */

:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: #1a2236;
    --bg-card-hover: #1f2942;
    --bg-glass: rgba(26, 34, 54, 0.7);
    --border: rgba(255, 255, 255, 0.06);
    --border-glow: rgba(59, 130, 246, 0.3);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #3b82f6;
    --accent-glow: rgba(59, 130, 246, 0.15);
    --success: #22c55e;
    --success-glow: rgba(34, 197, 94, 0.15);
    --warning: #f59e0b;
    --warning-glow: rgba(245, 158, 11, 0.15);
    --danger: #ef4444;
    --danger-glow: rgba(239, 68, 68, 0.15);
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* ── Header ── */

#app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 28px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--accent);
}

.logo h1 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.version-badge {
    font-size: 0.65rem;
    padding: 2px 8px;
    background: var(--accent-glow);
    color: var(--accent);
    border-radius: 20px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.ws-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
}

.ws-indicator.connected {
    background: var(--success-glow);
    color: var(--success);
}

.ws-indicator.disconnected {
    background: var(--danger-glow);
    color: var(--danger);
}

.ws-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* ── Tabs ── */

#tab-nav {
    display: flex;
    gap: 4px;
    padding: 12px 28px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-secondary);
}

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

/* ── Tab Content ── */

.tab-content {
    display: none;
    padding: 24px 28px;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ── Empty State ── */

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 20px;
    color: var(--text-muted);
    text-align: center;
}

.empty-state h2 {
    margin-top: 16px;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.empty-state p {
    margin-top: 8px;
    font-size: 0.85rem;
}

/* ── Monitor Grid ── */

.monitor-grid {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.analyzer-section {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}

.analyzer-section:hover {
    border-color: var(--border-glow);
    box-shadow: 0 0 20px var(--accent-glow);
}

.analyzer-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border);
}

.analyzer-section-header h3 {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.analyzer-section-header .inst-tag {
    font-size: 0.65rem;
    color: var(--text-muted);
    padding: 2px 8px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 12px;
}

.data-grid {
    display: flex;
    flex-direction: column;
}

.data-category {
    border-bottom: 1px solid var(--border);
}

.data-category:last-child {
    border-bottom: none;
}

.category-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 18px;
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    background: rgba(59, 130, 246, 0.04);
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    user-select: none;
    transition: var(--transition);
}

.category-header:hover {
    background: rgba(59, 130, 246, 0.08);
}

.collapse-icon {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.category-body {
    /* collapsible via JS display toggle */
}

/* ── Phase Table ── */

.phase-table {
    width: 100%;
    border-collapse: collapse;
}

.phase-table th, .phase-table td {
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.phase-table thead th {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    border-bottom: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.015);
}

.pt-label {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-weight: 500;
    white-space: nowrap;
    min-width: 120px;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.pt-val {
    transition: background-color 0.3s ease;
}

.pt-val .val-num {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--accent);
    font-variant-numeric: tabular-nums;
}

.pt-val .unit {
    font-size: 0.65rem;
    color: var(--text-muted);
    font-weight: 400;
    margin-left: 3px;
}

.pt-val.error .val-num {
    color: var(--danger);
    font-size: 0.75rem;
}

.pt-val.empty {
    color: var(--text-muted);
    opacity: 0.3;
}

.phase-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

/* ── Monofásico fallback grid ── */

.category-cells {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 1px;
    background: var(--border);
}

.data-cell {
    padding: 12px 14px;
    background: var(--bg-card);
    transition: background-color 0.3s ease;
}

.data-cell:hover {
    background: var(--bg-card-hover);
}

.data-cell .label {
    font-size: 0.65rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.data-cell .val-num {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent);
    font-variant-numeric: tabular-nums;
}

.data-cell .unit {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 400;
    margin-left: 3px;
}

.data-cell.error .val-num {
    color: var(--danger);
    font-size: 0.75rem;
}

/* ── Flash animation on value update ── */

@keyframes valFlash {
    0% { background-color: rgba(34, 197, 94, 0.15); }
    100% { background-color: transparent; }
}

.val-flash {
    animation: valFlash 1.2s ease-out;
}

/* ── Fullscreen button ── */

.fullscreen-btn {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    padding: 2px 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    line-height: 1;
}

.fullscreen-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--accent);
}

/* ── Fullscreen mode styles ── */

.analyzer-section:fullscreen {
    background: var(--bg-primary);
    padding: 24px;
    overflow-y: auto;
}

.analyzer-section:fullscreen .analyzer-section-header {
    padding: 16px 24px;
}

.analyzer-section:fullscreen .analyzer-section-header h3 {
    font-size: 1.3rem;
}

.analyzer-section:fullscreen .pt-val .val-num {
    font-size: 1.5rem;
}

.analyzer-section:fullscreen .pt-label {
    font-size: 0.85rem;
}

.analyzer-section:fullscreen .category-header {
    font-size: 0.8rem;
    padding: 12px 24px;
}

/* ── Analyzer Config List ── */

.config-header {
    margin-bottom: 24px;
}

.config-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
}

.config-header p {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 4px;
}

.analyzer-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow: hidden;
}

.analyzer-row {
    display: grid;
    grid-template-columns: 1fr 180px 120px 80px auto;
    align-items: center;
    padding: 14px 20px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
    gap: 12px;
}

.analyzer-row:last-child {
    border-bottom: none;
}

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

.analyzer-row.group-header {
    background: rgba(59, 130, 246, 0.05);
    padding: 10px 20px;
    grid-template-columns: 1fr;
}

.analyzer-row.group-header .inst-name {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.analyzer-info .name {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
}

.analyzer-info .model {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.analyzer-host {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-family: 'SF Mono', 'Fira Code', monospace;
}

.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
}

.status-pill.reading {
    background: var(--success-glow);
    color: var(--success);
}

.status-pill.stopped {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-muted);
}

.status-pill.connecting {
    background: var(--warning-glow);
    color: var(--warning);
}

.status-pill.error {
    background: var(--danger-glow);
    color: var(--danger);
}

.toggle-btn {
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.toggle-btn.start {
    background: var(--success-glow);
    color: var(--success);
    border: 1px solid rgba(34, 197, 94, 0.2);
}

.toggle-btn.start:hover {
    background: rgba(34, 197, 94, 0.25);
}

.toggle-btn.stop {
    background: var(--danger-glow);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.toggle-btn.stop:hover {
    background: rgba(239, 68, 68, 0.25);
}

.toggle-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ── Historico ── */

.historico-controls {
    display: flex;
    gap: 16px;
    align-items: flex-end;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.control-group label {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.control-group select {
    padding: 10px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.85rem;
    min-width: 180px;
    cursor: pointer;
    transition: var(--transition);
}

.control-group select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.custom-range-inputs {
    display: flex;
    gap: 12px;
    align-items: flex-end;
}

.control-group input[type="datetime-local"] {
    padding: 9px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
    color-scheme: dark;
}

.control-group input[type="datetime-local"]:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.btn-primary {
    padding: 10px 24px;
    background: var(--accent);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary:hover {
    background: #2563eb;
    box-shadow: 0 0 20px var(--accent-glow);
}

.chart-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    min-height: 400px;
}

/* ── UI Improvements ── */

.header-meta {
    display: flex;
    align-items: center;
    gap: 10px;
}

.last-update {
    font-size: 0.65rem;
    color: var(--text-muted);
    font-weight: 500;
    padding: 2px 8px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
}

.error-msg {
    font-size: 0.65rem;
    color: var(--danger);
    margin-top: 3px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 220px;
    cursor: help;
}

.config-toolbar {
    display: flex;
    align-items: flex-end;
    gap: 16px;
    padding: 16px 20px;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    margin-bottom: 16px;
    border: 1px solid var(--border);
    flex-wrap: wrap;
}

.toolbar-actions {
    display: flex;
    gap: 8px;
    margin-left: auto;
}

.btn-secondary {
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

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

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

.gw-badge {
    font-size: 0.65rem;
    padding: 2px 10px;
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent);
    border-radius: 12px;
    font-weight: 500;
}

.interval-select {
    padding: 6px 10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
    appearance: auto;
}

.interval-select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ── Loading ── */

.loading-spinner {
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ── Responsive ── */

@media (max-width: 768px) {
    #app-header { padding: 12px 16px; }
    .tab-content { padding: 16px; }
    .monitor-grid { grid-template-columns: 1fr; }
    .analyzer-row {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }
    .historico-controls {
        flex-direction: column;
        align-items: stretch;
    }
    .control-group select { min-width: unset; width: 100%; }
}

/* ── CRUD Modal ── */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 90%;
    max-width: 560px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: modalIn 0.2s ease-out;
}

@keyframes modalIn {
    from { opacity: 0; transform: translateY(-20px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 24px;
    border-bottom: 1px solid var(--border);
}

.modal-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.06);
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding: 24px;
}

.form-grid .control-group input[type="text"],
.form-grid .control-group input[type="number"] {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.85rem;
    transition: var(--transition);
    box-sizing: border-box;
}

.form-grid .control-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-grid .control-group select {
    min-width: unset;
    width: 100%;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 24px;
    border-top: 1px solid var(--border);
}

/* ── Row action buttons ── */

.row-actions {
    display: flex;
    gap: 6px;
    align-items: center;
}

.icon-btn {
    background: none;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    padding: 6px 8px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: var(--transition);
    line-height: 1;
}

.icon-btn:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--border);
}

.icon-btn.danger:hover {
    background: var(--danger-glow);
    border-color: rgba(239, 68, 68, 0.3);
}

.btn-secondary {
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}

.btn-secondary.btn-danger {
    color: var(--danger);
    border-color: rgba(239, 68, 68, 0.2);
}

.btn-secondary.btn-danger:hover {
    background: var(--danger-glow);
}

/* ── Model Editor Page ── */

.model-editor-page {
    min-height: 100vh;
    background: var(--bg-primary);
}

.editor-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}

.editor-header h2 {
    font-size: 1rem;
    font-weight: 600;
}

.editor-meta {
    display: flex;
    gap: 16px;
    padding: 20px 24px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
}

.editor-meta .control-group input {
    padding: 10px 14px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.85rem;
    min-width: 200px;
}

.editor-meta .control-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.register-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.register-table-wrap {
    overflow-x: auto;
    padding: 0 24px 24px;
}

.register-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
}

.register-table th {
    padding: 10px 12px;
    text-align: left;
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border);
}

.register-table td {
    padding: 6px 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    vertical-align: middle;
}

.register-table tbody tr:hover {
    background: rgba(59, 130, 246, 0.03);
}

.register-table input,
.register-table select {
    padding: 6px 8px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.78rem;
    width: 100%;
    box-sizing: border-box;
    transition: var(--transition);
}

.register-table input:focus,
.register-table select:focus {
    outline: none;
    border-color: var(--accent);
}

.register-table .reg-name { min-width: 200px; }
.register-table .reg-addr { width: 80px; }
.register-table .reg-hex { font-family: monospace; color: var(--text-muted); font-size: 0.75rem; white-space: nowrap; }
.register-table .reg-scale { width: 80px; }
.register-table .reg-count { width: 50px; }