:root {
    --bg-main: #f3f6fb;
    --bg-panel: #ffffff;
    --bg-panel-secondary: #f8fafc;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --border-color: #e2e8f0;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);

    --badge-low-bg: #dcfce7;
    --badge-low-text: #166534;

    --badge-medium-bg: #fef3c7;
    --badge-medium-text: #92400e;

    --badge-high-bg: #fee2e2;
    --badge-high-text: #991b1b;
}

body.theme-dark {
    --bg-main: #0f172a;
    --bg-panel: #111827;
    --bg-panel-secondary: #1f2937;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --border-color: #334155;
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);

    --badge-low-bg: #14532d;
    --badge-low-text: #bbf7d0;

    --badge-medium-bg: #78350f;
    --badge-medium-text: #fde68a;

    --badge-high-bg: #7f1d1d;
    --badge-high-text: #fecaca;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Inter, Arial, sans-serif;
    background: var(--bg-main);
    color: var(--text-primary);
    transition: background-color 0.25s ease, color 0.25s ease;
}

.main-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 24px;
    padding: 28px 32px;
    background: linear-gradient(135deg, #0f172a, #1e293b);
    color: #ffffff;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.header-left h1 {
    margin: 0;
    font-size: 32px;
    line-height: 1.2;
}

.eyebrow {
    margin: 0 0 8px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #93c5fd;
}

.page-subtitle {
    margin: 10px 0 0;
    max-width: 760px;
    color: #cbd5e1;
}

.header-right {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.theme-toggle {
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-width: 160px;
}

.theme-toggle label,
.form-group label {
    font-size: 14px;
    font-weight: 600;
    color: inherit;
}

.container {
    padding: 28px 32px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 18px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
    box-shadow: var(--shadow);
}

.stat-card.heat.low {
    border-left: 5px solid #22c55e;
}

.stat-card.heat.medium {
    border-left: 5px solid #f59e0b;
}

.stat-card.heat.high {
    border-left: 5px solid #ef4444;
}

.stat-label {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
}

.panel {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: var(--shadow);
}

.panel-header {
    margin-bottom: 18px;
}

.panel-header h2 {
    margin: 0 0 6px;
    font-size: 20px;
}

.panel-header p {
    margin: 0;
    color: var(--text-secondary);
}

.filter-form {
    display: flex;
    flex-wrap: wrap;
    align-items: end;
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-width: 180px;
}

.form-group-wide {
    flex: 1 1 320px;
}

input,
select,
button,
a.btn {
    height: 44px;
    padding: 0 14px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background: var(--bg-panel);
    color: var(--text-primary);
    font-size: 14px;
    text-decoration: none;
    transition: all 0.2s ease;
}

input::placeholder {
    color: var(--text-secondary);
}

select:focus,
input:focus,
button:focus,
a.btn:focus {
    outline: 2px solid rgba(37, 99, 235, 0.2);
    outline-offset: 2px;
}

.form-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    cursor: pointer;
}

.btn-primary {
    background: var(--accent);
    color: #ffffff;
    border-color: var(--accent);
}

.btn-primary:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
}

.btn-secondary {
    background: var(--bg-panel-secondary);
    color: var(--text-primary);
}

.table-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    min-width: 800px;
    border-collapse: collapse;
}

thead th {
    background: var(--bg-panel-secondary);
    color: var(--text-secondary);
    text-align: left;
    font-size: 13px;
    font-weight: 700;
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-color);
}

tbody td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    vertical-align: middle;
}

tbody tr:hover {
    background: rgba(148, 163, 184, 0.06);
}

.empty-state {
    text-align: center;
    color: var(--text-secondary);
    padding: 28px 16px;
}

.severity-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    padding: 6px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
}

.severity-low {
    background: var(--badge-low-bg);
    color: var(--badge-low-text);
}

.severity-medium {
    background: var(--badge-medium-bg);
    color: var(--badge-medium-text);
}

.severity-high {
    background: var(--badge-high-bg);
    color: var(--badge-high-text);
}

.chart-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
}

.chart-container {
    position: relative;
    height: 360px;
}

.heatmap-grid {
    display: grid;
    gap: 14px;
}

.heatmap-box {
    border-radius: 14px;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 700;
}

.heatmap-box span {
    font-size: 14px;
}

.heatmap-box strong {
    font-size: 28px;
}

.heat-low {
    background: rgba(34, 197, 94, 0.15);
    color: #16a34a;
}

.heat-medium {
    background: rgba(245, 158, 11, 0.16);
    color: #d97706;
}

.heat-high {
    background: rgba(239, 68, 68, 0.16);
    color: #dc2626;
}

.main-footer {
    margin-top: 10px;
    padding: 22px 32px;
    background: #0b1220;
    color: #cbd5e1;
    display: flex;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
    border-top: 1px solid rgba(255,255,255,0.06);
}

.main-footer span,
.main-footer strong {
    display: block;
}

.footer-center,
.footer-right {
    display: flex;
    align-items: center;
}

@media (max-width: 992px) {
    .chart-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .main-header,
    .container,
    .main-footer {
        padding-left: 18px;
        padding-right: 18px;
    }

    .main-header {
        flex-direction: column;
    }

    .header-left h1 {
        font-size: 26px;
    }

    .panel,
    .stat-card {
        padding: 18px;
    }

    .chart-container {
        height: 300px;
    }
}