/* ===== RESET & BASE ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0a0f1a;
    --bg-secondary: #111827;
    --bg-card: #1a2236;
    --bg-card-hover: #1f2a42;
    --border: #2a3654;
    --border-light: #374362;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --green: #34d399;
    --green-bg: rgba(52, 211, 153, 0.1);
    --blue: #60a5fa;
    --blue-bg: rgba(96, 165, 250, 0.1);
    --purple: #a78bfa;
    --purple-bg: rgba(167, 139, 250, 0.1);
    --amber: #fbbf24;
    --amber-bg: rgba(251, 191, 36, 0.1);
    --rose: #fb7185;
    --rose-bg: rgba(251, 113, 133, 0.1);
    --teal: #2dd4bf;
    --teal-bg: rgba(45, 212, 191, 0.1);
    --indigo: #818cf8;
    --indigo-bg: rgba(129, 140, 248, 0.1);
    --emerald: #34d399;
    --emerald-bg: rgba(52, 211, 153, 0.1);
    --red: #ef4444;
    --header-height: 56px;
    --tabs-height: 44px;
    --footer-height: 36px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
    --radius: 8px;
    --radius-lg: 12px;
}

html, body {
    height: 100%;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== TOP BAR ===== */
.top-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    z-index: 100;
    box-shadow: var(--shadow-md);
}

.top-bar-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

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

.logo h1 {
    font-size: 17px;
    font-weight: 700;
    letter-spacing: -0.3px;
    background: linear-gradient(135deg, #34d399, #60a5fa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 400;
    padding-left: 20px;
    border-left: 1px solid var(--border);
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.status-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.8px;
    padding: 4px 10px;
    border-radius: 20px;
    text-transform: uppercase;
}

.status-badge.live {
    background: var(--green-bg);
    color: var(--green);
    border: 1px solid rgba(52, 211, 153, 0.25);
}

.pulse {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--green);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.85); }
}

.last-updated {
    font-size: 11px;
    color: var(--text-muted);
}

/* ===== SHEET TABS ===== */
.sheet-tabs {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    height: var(--tabs-height);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: stretch;
    padding: 0 12px;
    gap: 2px;
    z-index: 99;
    overflow-x: auto;
    scrollbar-width: none;
}

.sheet-tabs::-webkit-scrollbar {
    display: none;
}

.sheet-tab {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 0 16px;
    font-size: 12.5px;
    font-weight: 500;
    color: var(--text-muted);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s ease;
    font-family: inherit;
}

.sheet-tab:hover {
    color: var(--text-secondary);
    background: rgba(255,255,255,0.03);
}

.sheet-tab.active {
    color: var(--green);
    border-bottom-color: var(--green);
    background: rgba(52, 211, 153, 0.05);
}

.sheet-tab svg {
    flex-shrink: 0;
}

/* ===== DASHBOARD CONTENT ===== */
.dashboard-content {
    position: fixed;
    top: calc(var(--header-height) + var(--tabs-height));
    left: 0;
    right: 0;
    bottom: var(--footer-height);
    overflow-y: auto;
    overflow-x: hidden;
    padding: 20px 24px;
    scroll-behavior: smooth;
}

.dashboard-content::-webkit-scrollbar {
    width: 6px;
}

.dashboard-content::-webkit-scrollbar-track {
    background: transparent;
}

.dashboard-content::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

.dashboard-content::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}

/* ===== SHEETS ===== */
.sheet {
    display: none;
}

.sheet.active {
    display: block;
    animation: fadeIn 0.25s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.sheet-header {
    margin-bottom: 20px;
}

.sheet-header h2 {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.3px;
    margin-bottom: 4px;
}

.sheet-header p {
    font-size: 13px;
    color: var(--text-muted);
}

/* ===== KPI CARDS ===== */
.kpi-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
    margin-bottom: 16px;
}

.kpi-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 16px 18px;
    display: flex;
    align-items: flex-start;
    gap: 14px;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
}

.kpi-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-light);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.kpi-card.green { border-left: 3px solid var(--green); }
.kpi-card.blue { border-left: 3px solid var(--blue); }
.kpi-card.purple { border-left: 3px solid var(--purple); }
.kpi-card.amber { border-left: 3px solid var(--amber); }
.kpi-card.rose { border-left: 3px solid var(--rose); }
.kpi-card.teal { border-left: 3px solid var(--teal); }
.kpi-card.indigo { border-left: 3px solid var(--indigo); }
.kpi-card.emerald { border-left: 3px solid var(--emerald); }

.kpi-icon {
    flex-shrink: 0;
    margin-top: 2px;
}

.kpi-data {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.kpi-value {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.5px;
    line-height: 1.1;
}

.kpi-label {
    font-size: 11.5px;
    color: var(--text-muted);
    font-weight: 500;
}

.kpi-change {
    font-size: 11px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 3px;
    margin-top: 2px;
}

.kpi-change.positive {
    color: var(--green);
}

.kpi-change.positive::before {
    content: '▲';
    font-size: 8px;
}

.kpi-change.negative {
    color: var(--rose);
}

.kpi-change.negative::before {
    content: '▼';
    font-size: 8px;
}

/* ===== CHART GRID ===== */
.chart-grid {
    display: grid;
    gap: 16px;
    margin-bottom: 16px;
}

.chart-grid.two-col {
    grid-template-columns: repeat(2, 1fr);
}

.chart-grid.three-col {
    grid-template-columns: repeat(3, 1fr);
}

.chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
}

.chart-card:hover {
    border-color: var(--border-light);
    box-shadow: var(--shadow-md);
}

.chart-card h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 2px;
    letter-spacing: -0.2px;
}

.chart-subtitle {
    font-size: 11.5px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.chart-card canvas {
    width: 100% !important;
    max-height: 280px;
}

/* ===== DATA TABLE ===== */
.data-table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12.5px;
}

.data-table th {
    text-align: left;
    padding: 10px 14px;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    background: rgba(255,255,255,0.02);
    white-space: nowrap;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table td {
    padding: 10px 14px;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    color: var(--text-primary);
}

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

/* ===== FOOTER ===== */
.dashboard-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--footer-height);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    font-size: 11px;
    color: var(--text-muted);
    z-index: 98;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1200px) {
    .kpi-row {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 900px) {
    .chart-grid.two-col,
    .chart-grid.three-col {
        grid-template-columns: 1fr;
    }
    .subtitle {
        display: none;
    }
    .dashboard-content {
        padding: 16px;
    }
}

@media (max-width: 640px) {
    .kpi-row {
        grid-template-columns: 1fr;
    }
    .top-bar {
        padding: 0 12px;
    }
    .sheet-tabs {
        padding: 0 8px;
    }
    .sheet-tab {
        padding: 0 10px;
        font-size: 11.5px;
    }
    .logo h1 {
        font-size: 14px;
    }
    .last-updated {
        display: none;
    }
}