/* ============================================================
   SAFINA KITCHEN — POWER MONITORING
   app.css  |  Dark Industrial + Light Cream Pastel
   ============================================================ */

/* ---- 1. THEME VARIABLES ---- */
:root {
    /* Brand */
    --green-neon:   #3ddc84;
    --green-soft:   #2ecc71;
    --green-dark:   #1a6b3a;
    --gold:         #f5c842;
    --gold-soft:    #ffe066;
    --gold-dark:    #b8960c;

    /* Transitions */
    --transition:   0.25s ease;
}

[data-theme="dark"] {
    --bg-body:      #0d1117;
    --bg-sidebar:   #0b0f14;
    --bg-card:      #161b22;
    --bg-card2:     #1c2330;
    --bg-input:     #1c2330;
    --border:       rgba(255,255,255,0.07);
    --border-focus: var(--green-neon);
    --text:         #e6edf3;
    --text-muted:   #8b949e;
    --text-sub:     #6e7681;
    --shadow:       0 4px 24px rgba(0,0,0,0.5);
    --shadow-card:  0 2px 8px rgba(0,0,0,0.4);
    --accent:       var(--green-neon);
    --accent2:      var(--gold);
    --status-on:    #3ddc84;
    --status-off:   #484f58;
    --topbar-bg:    rgba(13,17,23,0.92);
    --table-stripe: rgba(255,255,255,0.025);
    --tab-bg:       #1c2330;
    --tab-active:   var(--green-neon);
    --tab-text:     #8b949e;
}

[data-theme="light"] {
    --bg-body:      #fdf8f0;
    --bg-sidebar:   #fffdf7;
    --bg-card:      #ffffff;
    --bg-card2:     #fdf6ec;
    --bg-input:     #fdf6ec;
    --border:       #e8dcc8;
    --border-focus: var(--green-dark);
    --text:         #2c2416;
    --text-muted:   #8b7355;
    --text-sub:     #b09c7a;
    --shadow:       0 4px 24px rgba(180,150,100,0.10);
    --shadow-card:  0 2px 8px rgba(180,150,100,0.10);
    --accent:       var(--green-dark);
    --accent2:      var(--gold-dark);
    --status-on:    #1a6b3a;
    --status-off:   #ccc0aa;
    --topbar-bg:    rgba(255,253,247,0.95);
    --table-stripe: rgba(200,180,140,0.06);
    --tab-bg:       #fdf6ec;
    --tab-active:   var(--green-dark);
    --tab-text:     #8b7355;
}

/* ---- 2. RESET & BASE ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; scroll-behavior: smooth; }
body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-body);
    color: var(--text);
    display: flex;
    min-height: 100vh;
    transition: background var(--transition), color var(--transition);
    overflow: hidden;
}
a { text-decoration: none; color: inherit; }
button { cursor: pointer; }
input, select, textarea { font-family: inherit; }

/* ---- 3. LAYOUT ---- */
.sidebar {
    width: 220px;
    min-width: 220px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: fixed;
    left: 0; top: 0;
    z-index: 200;
    transition: transform var(--transition), background var(--transition);
}
.main-wrapper {
    margin-left: 220px;
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    width: calc(100% - 220px);
    overflow: hidden;
}

/* ---- 4. SIDEBAR ---- */
.sidebar-header {
    padding: 1.2rem 1rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}
.crown-icon { font-size: 1.8rem; line-height: 1; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-safina {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 0.5px;
}
[data-theme="dark"] .brand-safina { text-shadow: 0 0 12px var(--green-neon); }
.brand-kitchen {
    font-size: 0.75rem;
    color: var(--accent2);
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
}
[data-theme="dark"] .brand-kitchen { text-shadow: 0 0 8px var(--gold); }

.sidebar-close {
    display: none;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.1rem;
    padding: 4px;
}

.sidebar-nav { padding: 1rem 0.75rem; flex: 1; }
.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 8px;
    color: var(--text-muted);
    margin-bottom: 4px;
    font-size: 0.9rem;
    transition: all var(--transition);
}
.nav-item svg { width: 18px; height: 18px; fill: currentColor; flex-shrink: 0; }
.nav-item:hover { background: var(--bg-card); color: var(--text); }
.nav-item.active {
    background: var(--bg-card);
    color: var(--accent);
    font-weight: 600;
    border-left: 3px solid var(--accent);
}
[data-theme="dark"] .nav-item.active { box-shadow: inset 0 0 20px rgba(61,220,132,0.05); }

.sidebar-footer {
    padding: 0.85rem 1rem;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.sf-version {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 1px;
    font-family: 'Courier New', monospace;
}
[data-theme="dark"] .sf-version { text-shadow: 0 0 6px var(--green-neon); }
.sf-name {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.3px;
}
.sf-brand {
    font-size: 0.7rem;
    color: var(--text-sub);
    margin-top: 1px;
}
.sf-brand strong {
    color: var(--accent2);
    font-weight: 700;
    letter-spacing: 0.5px;
}
[data-theme="dark"] .sf-brand strong { text-shadow: 0 0 5px var(--gold); }
.sf-dot { font-size: 0.7rem; }
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 190;
}

/* ---- 5. TOPBAR ---- */
.topbar {
    height: 60px;
    background: var(--topbar-bg);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    position: sticky;
    top: 0;
    z-index: 100;
}
.topbar-left { display: flex; align-items: center; gap: 12px; }
.btn-hamburger {
    display: none;
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 4px;
    border-radius: 6px;
}
.btn-hamburger:hover { color: var(--accent); }

.topbar-brand { display: flex; align-items: center; gap: 6px; }
.crown-sm { font-size: 1.1rem; }
.topbar-title { font-weight: 700; font-size: 0.95rem; color: var(--accent); }
[data-theme="dark"] .topbar-title { text-shadow: 0 0 8px var(--green-neon); }
.topbar-sub { font-size: 0.72rem; color: var(--text-muted); display: none; }

.topbar-right { display: flex; align-items: center; gap: 10px; }
.btn-theme {
    width: 34px; height: 34px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50%;
    color: var(--text-muted);
    display: flex; align-items: center; justify-content: center;
    transition: all var(--transition);
}
.btn-theme:hover { border-color: var(--accent); color: var(--accent); }
.topbar-clock {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: 'Courier New', monospace;
    min-width: 70px;
}

/* ---- 6. PAGE CONTENT ---- */
.page-content {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    max-height: calc(100vh - 60px);
}
.page-header { margin-bottom: 1.5rem; }
.page-title { font-size: 1.4rem; font-weight: 700; color: var(--text); }
.page-date { font-size: 0.8rem; color: var(--text-muted); margin-top: 2px; }

/* ---- 7. CARDS ---- */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.2rem;
    transition: box-shadow var(--transition);
}
[data-theme="dark"] .card { box-shadow: var(--shadow-card); }
[data-theme="light"] .card { box-shadow: 0 2px 12px rgba(180,150,100,0.08); }

.card-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
}
.card-icon { width: 18px; height: 18px; stroke: var(--accent); stroke-width: 2; fill: none; flex-shrink: 0; }
.card-title { font-size: 0.8rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.card-title-main { font-size: 0.95rem; font-weight: 600; color: var(--text); }

/* ---- 8. STAT CARDS ---- */
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-bottom: 1.25rem; }
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.1rem 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 6px;
    position: relative;
    overflow: hidden;
    transition: transform var(--transition);
}
.stat-card:hover { transform: translateY(-2px); }
.stat-card::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 40%;
    height: 2px;
    background: var(--accent);
    border-radius: 0 2px 0 0;
}
.stat-card:nth-child(2)::after { background: var(--accent2); }
.stat-card:nth-child(3)::after { background: #60a5fa; }
.stat-card:nth-child(4)::after { background: #c084fc; }

.stat-label { font-size: 0.72rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.stat-value { font-size: 1.7rem; font-weight: 700; font-family: 'Courier New', monospace; line-height: 1; }
.stat-unit  { font-size: 0.8rem; color: var(--accent); }
.stat-badge {
    display: inline-flex; align-items: center; gap: 4px;
    font-size: 0.7rem; padding: 2px 8px; border-radius: 20px;
    background: rgba(61,220,132,0.1); color: var(--status-on);
    width: fit-content;
}
[data-theme="light"] .stat-badge { background: rgba(26,107,58,0.1); }

/* ---- 9. GRID LAYOUTS ---- */
.grid-2    { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; margin-bottom: 1.25rem; }
.grid-3    { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1.25rem; margin-bottom: 1.25rem; }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 1rem; margin-bottom: 1.25rem; }
.col-span-2 { grid-column: span 2; }

/* ---- 10. DEVICE STATUS CARDS ---- */
.device-status-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 0.9rem;
    transition: transform var(--transition), box-shadow var(--transition);
    position: relative;
    overflow: hidden;
}
.device-status-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-card); }
.device-status-card.online { border-top: 2px solid var(--status-on); }
.device-status-card.offline { border-top: 2px solid var(--status-off); opacity: 0.7; }
[data-theme="dark"] .device-status-card.online::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 40px;
    background: linear-gradient(to bottom, rgba(61,220,132,0.05), transparent);
}

.dev-head { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 0.7rem; }
.dev-name { font-size: 0.78rem; font-weight: 600; color: var(--text); }
.dev-type { font-size: 0.65rem; color: var(--text-muted); margin-top: 1px; }
.status-indicator {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--status-on);
    box-shadow: 0 0 6px var(--status-on);
    flex-shrink: 0;
    margin-top: 3px;
}
.status-indicator.off { background: var(--status-off); box-shadow: none; }
[data-theme="dark"] .status-indicator { animation: pulse-dot 2s infinite; }
@keyframes pulse-dot {
    0%,100% { box-shadow: 0 0 4px var(--status-on); }
    50%      { box-shadow: 0 0 10px var(--status-on), 0 0 20px rgba(61,220,132,0.3); }
}

.dev-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 5px; }
.dev-stat { background: var(--bg-card2); border-radius: 5px; padding: 5px 7px; }
.ds-label { font-size: 0.6rem; color: var(--text-muted); text-transform: uppercase; display: block; }
.ds-val { font-size: 0.88rem; font-weight: 700; font-family: 'Courier New', monospace; color: var(--text); }
.ds-val.highlight { color: var(--accent); }
[data-theme="dark"] .ds-val.highlight { text-shadow: 0 0 6px var(--green-neon); }

/* ---- 11. CHART AREA ---- */
.chart-wrap {
    position: relative;
    width: 100%;
    overflow: hidden;
}
.chart-wrap canvas {
    width: 100% !important;
    max-height: 100% !important;
    display: block;
}

.chart-tabs-row {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 0.75rem;
}
.chart-tab {
    padding: 5px 14px;
    border-radius: 20px;
    font-size: 0.78rem;
    background: var(--tab-bg);
    color: var(--tab-text);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: all var(--transition);
}
.chart-tab.active {
    background: var(--tab-active);
    color: #fff;
    border-color: var(--tab-active);
    font-weight: 600;
}
[data-theme="light"] .chart-tab.active { color: #fff; }

/* ---- 12. CALENDAR HEATMAP ---- */
.heatmap-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 3px;
    margin-top: 0.5rem;
}
.hm-day {
    aspect-ratio: 1;
    border-radius: 3px;
    background: var(--bg-card2);
    position: relative;
    cursor: default;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.62rem;
    color: var(--text-sub);
    transition: transform 0.1s;
}
.hm-day:hover { transform: scale(1.3); z-index: 10; }
.hm-day.low    { background: rgba(61,220,132,0.15); }
.hm-day.med    { background: rgba(61,220,132,0.40); color: #fff; }
.hm-day.high   { background: rgba(61,220,132,0.75); color: #fff; font-weight: bold; }
.hm-day.today  { border: 2px solid var(--accent2); }
[data-theme="light"] .hm-day.low  { background: rgba(26,107,58,0.12); }
[data-theme="light"] .hm-day.med  { background: rgba(26,107,58,0.35); }
[data-theme="light"] .hm-day.high { background: rgba(26,107,58,0.70); }

.hm-tooltip {
    display: none;
    position: absolute;
    bottom: 110%; left: 50%;
    transform: translateX(-50%);
    background: var(--bg-sidebar);
    border: 1px solid var(--border);
    border-top: 2px solid var(--accent);
    color: var(--text);
    padding: 6px 10px;
    border-radius: 6px;
    font-size: 0.7rem;
    white-space: nowrap;
    z-index: 50;
    pointer-events: none;
    box-shadow: var(--shadow);
}
.hm-day:hover .hm-tooltip { display: block; }

/* ---- 13. DEVICE TABS (Devices page) ---- */
.device-tabs-bar {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 1.25rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.75rem;
}
.device-tab-btn {
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    border: 1px solid var(--border);
    background: var(--tab-bg);
    color: var(--tab-text);
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}
.device-tab-btn:hover { border-color: var(--accent); color: var(--accent); }
.device-tab-btn.active {
    background: var(--tab-active);
    color: #fff;
    border-color: var(--tab-active);
    font-weight: 600;
}
[data-theme="light"] .device-tab-btn.active { color: #fff; }

.tab-pane { display: none; }
.tab-pane.active { display: block; }

/* ---- 14. TABLE ---- */
.table-toolbar {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 0.75rem;
}
.table-toolbar input[type="date"],
.table-toolbar select {
    padding: 6px 10px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--bg-input);
    color: var(--text);
    font-size: 0.8rem;
    transition: border-color var(--transition);
}
.table-toolbar input[type="date"]:focus,
.table-toolbar select:focus { outline: none; border-color: var(--border-focus); }

.btn-sm {
    padding: 6px 14px;
    border-radius: 6px;
    border: none;
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex; align-items: center; gap: 5px;
    transition: all var(--transition);
}
.btn-primary { background: var(--accent); color: #0d1117; }
[data-theme="light"] .btn-primary { color: #fff; }
.btn-primary:hover { opacity: 0.85; }
.btn-success { background: #28a745; color: #fff; }
.btn-success:hover { background: #218838; }
.btn-danger  { background: #dc3545; color: #fff; }
.btn-danger:hover  { background: #c82333; }
.btn-gold    { background: var(--accent2); color: #0d1117; }
[data-theme="light"] .btn-gold { color: #2c2416; }
.btn-gold:hover { opacity: 0.85; }
.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.ms-auto { margin-left: auto; }

.table-wrap { overflow-x: auto; border-radius: 8px; border: 1px solid var(--border); }
table.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}
table.data-table thead th {
    background: var(--bg-card2);
    color: var(--text-muted);
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.5px;
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
    cursor: pointer;
    user-select: none;
}
table.data-table thead th:hover { color: var(--accent); }
table.data-table thead th.sort-asc::after  { content: ' ▲'; color: var(--accent); }
table.data-table thead th.sort-desc::after { content: ' ▼'; color: var(--accent); }
table.data-table tbody td {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
    color: var(--text);
    white-space: nowrap;
}
table.data-table tbody tr:last-child td { border-bottom: none; }
table.data-table tbody tr:nth-child(even) { background: var(--table-stripe); }
table.data-table tbody tr:hover { background: var(--bg-card2); }
.td-mono { font-family: 'Courier New', monospace; }
.td-on  { color: var(--status-on); font-weight: 600; font-size: 0.75rem; }
.td-off { color: var(--status-off); font-size: 0.75rem; }

.pagination {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 0.75rem 0.5rem;
    flex-wrap: wrap;
}
.page-btn {
    width: 30px; height: 30px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-muted);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all var(--transition);
}
.page-btn:hover, .page-btn.active { background: var(--accent); color: #0d1117; border-color: var(--accent); }
[data-theme="light"] .page-btn.active { color: #fff; }
.page-info { font-size: 0.78rem; color: var(--text-muted); margin-left: 8px; }

/* ---- 15. SETTINGS FORM ---- */
.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.form-group { display: flex; flex-direction: column; gap: 5px; margin-bottom: 0.9rem; }
.form-label { font-size: 0.78rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.3px; }
.form-control {
    padding: 9px 12px;
    border-radius: 7px;
    border: 1px solid var(--border);
    background: var(--bg-input);
    color: var(--text);
    font-size: 0.88rem;
    transition: border-color var(--transition);
    width: 100%;
}
.form-control:focus { outline: none; border-color: var(--border-focus); }
.form-control.error { border-color: #dc3545; }
.form-select {
    padding: 9px 12px;
    border-radius: 7px;
    border: 1px solid var(--border);
    background: var(--bg-input);
    color: var(--text);
    font-size: 0.88rem;
    width: 100%;
    cursor: pointer;
}
.form-select:focus { outline: none; border-color: var(--border-focus); }

/* Device table in settings */
.settings-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.settings-table th {
    padding: 10px 12px;
    background: var(--bg-card2);
    color: var(--text-muted);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    border-bottom: 1px solid var(--border);
    text-align: left;
}
.settings-table td {
    padding: 9px 12px;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}
.settings-table tr:hover td { background: var(--table-stripe); }
.badge {
    display: inline-block; padding: 2px 8px; border-radius: 10px;
    font-size: 0.7rem; font-weight: 600;
}
.badge-on  { background: rgba(61,220,132,0.15); color: var(--status-on); }
.badge-off { background: rgba(130,130,130,0.15); color: var(--text-muted); }
[data-theme="light"] .badge-on { background: rgba(26,107,58,0.12); }

/* ---- 16. MODAL ---- */
.modal-overlay {
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(6px);
    z-index: 500;
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden;
    transition: all var(--transition);
}
.modal-overlay.open { opacity: 1; visibility: visible; }
.modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 1.8rem;
    width: 90%;
    max-width: 440px;
    transform: translateY(15px);
    transition: transform var(--transition);
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.modal-overlay.open .modal { transform: translateY(0); }
.modal-title { font-size: 1rem; font-weight: 700; margin-bottom: 1.2rem; color: var(--text); }
.modal-footer { display: flex; gap: 10px; justify-content: flex-end; margin-top: 1.4rem; }

/* ---- 17. TOAST ---- */
.toast {
    position: fixed;
    bottom: 1.5rem; right: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent);
    color: var(--text);
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 0.85rem;
    z-index: 9999;
    box-shadow: var(--shadow);
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s;
    pointer-events: none;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.error { border-left-color: #dc3545; }

/* ---- 18. LOADING SPINNER ---- */
.spinner {
    width: 32px; height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    margin: 2rem auto;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-wrap { display: flex; justify-content: center; padding: 2rem; }

/* ---- 19. RESPONSIVE ---- */
@media (max-width: 1100px) {
    .stat-grid { grid-template-columns: repeat(2, 1fr); }
    .settings-grid { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.open {
        transform: translateX(0);
        box-shadow: 4px 0 20px rgba(0,0,0,0.3);
    }
    .sidebar-close { display: flex; }
    .sidebar-overlay.open { display: block; }
    .main-wrapper { margin-left: 0; width: 100%; }
    .btn-hamburger { display: flex; }
    .topbar-sub { display: block; }
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    .col-span-2 { grid-column: span 1; }
}

@media (max-width: 600px) {
    .stat-grid { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
    .stat-value { font-size: 1.3rem; }
    .page-content { padding: 1rem; }
    .topbar { padding: 0 1rem; }
    .table-toolbar { gap: 5px; }
}

@media (max-width: 380px) {
    .stat-grid { grid-template-columns: 1fr 1fr; }
    .device-tab-btn { padding: 5px 10px; font-size: 0.75rem; }
}