/* ── CSS Variables ─────────────────────────────────────────────── */
:root {
    --bg-primary: #0f1117;
    --bg-card: #1a1d27;
    --bg-input: #252836;
    --bg-hover: #2a2d3a;
    --border: #2e3348;
    --text-primary: #e1e4ed;
    --text-secondary: #8b8fa3;
    --text-muted: #5c6078;
    --accent-green: #22c55e;
    --accent-green-dim: rgba(34, 197, 94, 0.15);
    --accent-red: #ef4444;
    --accent-red-dim: rgba(239, 68, 68, 0.15);
    --accent-blue: #3b82f6;
    --accent-blue-dim: rgba(59, 130, 246, 0.15);
    --accent-yellow: #eab308;
    --accent-yellow-dim: rgba(234, 179, 8, 0.15);
    --accent-purple: #a855f7;
    --radius: 8px;
    --font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", monospace;
}

/* ── Reset & Base ─────────────────────────────────────────────── */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
}

/* ── Layout ───────────────────────────────────────────────────── */
.app-layout {
    display: grid;
    grid-template-columns: 340px 1fr;
    min-height: 100vh;
}

.sidebar {
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    padding: 1.5rem;
    overflow-y: auto;
    position: sticky;
    top: 0;
    height: 100vh;
}

.main-content {
    padding: 1.5rem 2rem;
    overflow-y: auto;
}

/* ── Sidebar ──────────────────────────────────────────────────── */
.sidebar h1 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.sidebar .subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.3rem;
    font-weight: 600;
}

.form-group input[type="number"],
.form-group input[type="text"] {
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
    font-family: var(--font-mono);
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.form-group input[type="range"] {
    width: 100%;
    accent-color: var(--accent-blue);
}

.slider-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.slider-row input[type="range"] {
    flex: 1;
}

.slider-value {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-blue);
    min-width: 3.5rem;
    text-align: right;
}

.kelly-preview {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.75rem;
    margin: 1rem 0;
    text-align: center;
}

.kelly-preview .kelly-value {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-blue);
}

.kelly-preview .kelly-label {
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.btn-row {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.btn {
    flex: 1;
    padding: 0.6rem 1rem;
    border: none;
    border-radius: var(--radius);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s;
}

.btn:hover {
    opacity: 0.85;
}
.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--accent-blue);
    color: white;
}

.btn-secondary {
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.seed-row {
    display: flex;
    gap: 0.5rem;
    align-items: flex-end;
}

.seed-row .form-group {
    flex: 1;
}

.seed-row .btn {
    flex: none;
    padding: 0.5rem;
    font-size: 0.75rem;
    height: 36px;
}

/* ── Results: Hidden until simulation ─────────────────────────── */
#results {
    display: none;
}
#results.visible {
    display: block;
}

/* ── Section Headers ──────────────────────────────────────────── */
.section-title {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
}

.section {
    margin-bottom: 2rem;
}

/* ── Edge Summary Box ─────────────────────────────────────────── */
.edge-summary {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.edge-rating {
    font-size: 1.5rem;
    font-weight: 800;
    white-space: nowrap;
}

.edge-rating.strong {
    color: var(--accent-green);
}
.edge-rating.moderate {
    color: var(--accent-blue);
}
.edge-rating.marginal {
    color: var(--accent-yellow);
}
.edge-rating.noedge {
    color: var(--accent-red);
}

.edge-details {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 0.75rem;
}

.edge-stat .value {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 700;
}

.edge-stat .label {
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.edge-interpretation {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-style: italic;
    margin-top: 0.5rem;
    grid-column: 1 / -1;
}

/* ── Metric Cards Grid ────────────────────────────────────────── */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
}

.card .card-value {
    font-family: var(--font-mono);
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.15rem;
}

.card .card-label {
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-weight: 600;
}

.card .card-interp {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-style: italic;
    margin-top: 0.35rem;
    line-height: 1.35;
}

.card-value.safe {
    color: var(--accent-green);
}
.card-value.caution {
    color: var(--accent-yellow);
}
.card-value.danger {
    color: var(--accent-red);
}
.card-value.info {
    color: var(--accent-blue);
}

/* ── Charts Grid ──────────────────────────────────────────────── */
.charts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.chart-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    position: relative;
}

.chart-container .chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.chart-container .chart-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    font-weight: 600;
}

.chart-area {
    position: relative;
    height: 320px;
    width: 100%;
}

.chart-toggle {
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    cursor: pointer;
}

.chart-toggle:hover {
    border-color: var(--accent-blue);
    color: var(--text-primary);
}
.chart-toggle.active {
    background: var(--accent-blue-dim);
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

/* ── Comparison Table ─────────────────────────────────────────── */
.table-wrap {
    overflow-x: auto;
    margin-bottom: 1.5rem;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}

.comparison-table th {
    text-align: left;
    padding: 0.6rem 0.75rem;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--border);
    font-weight: 600;
    white-space: nowrap;
}

.comparison-table td {
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid var(--border);
    font-family: var(--font-mono);
    white-space: nowrap;
}

.comparison-table tr:hover {
    background: var(--bg-hover);
}
.comparison-table tr.highlighted {
    background: var(--accent-blue-dim);
}

.comparison-table .safe {
    color: var(--accent-green);
}
.comparison-table .caution {
    color: var(--accent-yellow);
}
.comparison-table .danger {
    color: var(--accent-red);
}

/* ── Extra Panels Row ─────────────────────────────────────────── */
.panels-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
}

.panel-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.panel-value {
    font-family: var(--font-mono);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent-purple);
}

.panel-detail {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.35rem;
}

.panel-interp {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-style: italic;
    margin-top: 0.5rem;
}

/* ── Loading Overlay ──────────────────────────────────────────── */
.loading-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15, 17, 23, 0.85);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    gap: 1rem;
}

.loading-overlay.visible {
    display: flex;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-text {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 1024px) {
    .charts-grid {
        grid-template-columns: 1fr;
    }
    .panels-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .app-layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: relative;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }

    .main-content {
        padding: 1rem;
    }

    .edge-summary {
        flex-direction: column;
        text-align: center;
    }

    .cards-grid {
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    }
}