/* 
 * styles.css — FraudGraph AI Dashboard
 * Dark-mode glassmorphism theme with vibrant gradient accents
 */

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

:root {
    --bg-primary:    #0b0e17;
    --bg-secondary:  #111827;
    --bg-card:       rgba(17, 24, 39, 0.7);
    --bg-glass:      rgba(255, 255, 255, 0.03);
    --border-color:  rgba(255, 255, 255, 0.06);
    --border-glow:   rgba(99, 102, 241, 0.15);
    --text-primary:  #f1f5f9;
    --text-secondary:#94a3b8;
    --text-muted:    #64748b;
    --accent-indigo: #6366f1;
    --accent-rose:   #f43f5e;
    --accent-emerald:#10b981;
    --accent-amber:  #f59e0b;
    --accent-cyan:   #06b6d4;
    --gradient-1:    linear-gradient(135deg, #6366f1, #8b5cf6);
    --gradient-2:    linear-gradient(135deg, #f43f5e, #e11d48);
    --gradient-3:    linear-gradient(135deg, #10b981, #059669);
    --gradient-4:    linear-gradient(135deg, #f59e0b, #d97706);
    --radius:        12px;
    --radius-sm:     8px;
    --shadow-card:   0 4px 24px rgba(0,0,0,0.3), 0 0 0 1px var(--border-color);
    --shadow-glow:   0 0 30px rgba(99, 102, 241, 0.08);
    --transition:    all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    font-size: 14px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    background-image:
        radial-gradient(ellipse at 20% 0%, rgba(99,102,241,0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 100%, rgba(244,63,94,0.06) 0%, transparent 50%);
}

/* ── Header ────────────────────────────────────────────────── */
#main-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 32px;
    background: rgba(11, 14, 23, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

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

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #f1f5f9, #cbd5e1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

.logo .accent {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    font-weight: 800;
}

.badge {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 4px 10px;
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent-indigo);
    border-radius: 20px;
    border: 1px solid rgba(99, 102, 241, 0.2);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-emerald);
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.5);
    animation: pulse-dot 2s infinite;
}

.status-dot.scanning {
    background: var(--accent-amber);
    box-shadow: 0 0 8px rgba(245, 158, 11, 0.5);
    animation: pulse-dot 0.5s infinite;
}

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

.status-text {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.btn-scan {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    background: var(--gradient-1);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 2px 12px rgba(99, 102, 241, 0.3);
}

.btn-scan:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.5);
}

.btn-scan:active {
    transform: translateY(0);
}

.btn-scan:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* ── KPI Cards ─────────────────────────────────────────────── */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    padding: 24px 32px;
}

.kpi-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-card);
    transition: var(--transition);
}

.kpi-card:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-card), var(--shadow-glow);
    transform: translateY(-2px);
}

.kpi-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 12px;
    flex-shrink: 0;
}

.icon-blue   { background: rgba(99, 102, 241, 0.15); color: var(--accent-indigo); }
.icon-red    { background: rgba(244, 63, 94, 0.15);   color: var(--accent-rose);   }
.icon-amber  { background: rgba(245, 158, 11, 0.15);  color: var(--accent-amber);  }
.icon-green  { background: rgba(16, 185, 129, 0.15);  color: var(--accent-emerald);}

.kpi-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.kpi-value {
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.kpi-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

/* ── Main Grid ─────────────────────────────────────────────── */
.main-grid {
    display: grid;
    grid-template-columns: 1fr 380px;
    grid-template-rows: auto auto auto;
    gap: 20px;
    padding: 0 32px 32px;
}

.panel {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-card);
    overflow: hidden;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}

.panel-header h2 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.panel-header h3 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ── Graph Panel ───────────────────────────────────────────── */
.panel-graph {
    grid-column: 1;
    grid-row: 1;
    min-height: 420px;
}

.graph-container {
    position: relative;
    width: 100%;
    height: 380px;
    overflow: hidden;
}

#graph-svg {
    width: 100%;
    height: 100%;
}

.legend {
    display: flex;
    gap: 14px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.72rem;
    color: var(--text-secondary);
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.dot-safe       { background: var(--accent-emerald); }
.dot-suspicious { background: var(--accent-amber);   }
.dot-fraud      { background: var(--accent-rose);    }

.graph-tooltip {
    position: fixed;
    padding: 10px 14px;
    background: rgba(17, 24, 39, 0.95);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--text-primary);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 200;
    max-width: 260px;
    line-height: 1.5;
}

/* ── Metrics Panel ─────────────────────────────────────────── */
.panel-metrics {
    grid-column: 2;
    grid-row: 1 / 3;
}

.metrics-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    padding: 16px;
}

.metric-card {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 1;
    border-radius: var(--radius-sm);
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
}

.metric-card canvas {
    max-width: 100%;
    max-height: 100%;
}

.metric-value-overlay {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    pointer-events: none;
}

.metric-big {
    font-size: 1.3rem;
    font-weight: 700;
}

.metric-label {
    font-size: 0.65rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.confusion-section {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
}

.confusion-section h3 {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.confusion-matrix {
    display: grid;
    grid-template-columns: auto 1fr 1fr;
    gap: 6px;
}

.cm-header {
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-align: center;
    padding: 6px 4px;
}

.cm-label {
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    padding-right: 8px;
}

.cm-cell {
    text-align: center;
    padding: 10px 8px;
    border-radius: 6px;
    font-weight: 700;
    font-size: 1rem;
}

.cm-tn { background: rgba(16, 185, 129, 0.12); color: var(--accent-emerald); }
.cm-fp { background: rgba(245, 158, 11, 0.12); color: var(--accent-amber);   }
.cm-fn { background: rgba(244, 63, 94, 0.12);  color: var(--accent-rose);    }
.cm-tp { background: rgba(99, 102, 241, 0.12); color: var(--accent-indigo);  }

.risk-chart-section {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
}

.risk-chart-section h3 {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

#chart-risk-dist {
    max-height: 180px;
}

/* ── Alerts Panel ──────────────────────────────────────────── */
.panel-alerts {
    grid-column: 1;
    grid-row: 2;
    max-height: 380px;
}

.alert-count {
    font-size: 0.72rem;
    font-weight: 700;
    padding: 3px 10px;
    background: rgba(244, 63, 94, 0.15);
    color: var(--accent-rose);
    border-radius: 20px;
    border: 1px solid rgba(244, 63, 94, 0.2);
}

.alerts-list {
    padding: 8px 12px;
    overflow-y: auto;
    max-height: 320px;
}

.alert-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    margin-bottom: 6px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    animation: slide-in 0.3s ease-out;
}

.alert-item:hover {
    border-color: var(--border-glow);
}

@keyframes slide-in {
    from { opacity: 0; transform: translateX(-10px); }
    to   { opacity: 1; transform: translateX(0);     }
}

.alert-severity {
    flex-shrink: 0;
    width: 6px;
    height: 100%;
    min-height: 36px;
    border-radius: 3px;
}

.severity-critical { background: var(--accent-rose);    }
.severity-high     { background: var(--accent-amber);   }
.severity-medium   { background: var(--accent-cyan);    }
.severity-low      { background: var(--accent-emerald); }

.alert-body {
    flex: 1;
    min-width: 0;
}

.alert-title {
    font-size: 0.78rem;
    font-weight: 600;
    margin-bottom: 2px;
    color: var(--text-primary);
}

.alert-desc {
    font-size: 0.7rem;
    color: var(--text-secondary);
    line-height: 1.4;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
}

.alert-time {
    font-size: 0.62rem;
    color: var(--text-muted);
    margin-top: 3px;
}

/* ── Transaction Table ─────────────────────────────────────── */
.panel-transactions {
    grid-column: 1 / -1;
    grid-row: 3;
}

.filter-bar {
    display: flex;
    gap: 6px;
}

.filter-btn {
    padding: 5px 14px;
    background: var(--bg-glass);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.72rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn.active {
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent-indigo);
    border-color: rgba(99, 102, 241, 0.3);
}

.filter-btn:hover:not(.active) {
    background: rgba(255,255,255,0.05);
}

.table-wrapper {
    overflow-x: auto;
    max-height: 400px;
    overflow-y: auto;
}

#txn-table {
    width: 100%;
    border-collapse: collapse;
}

#txn-table th {
    position: sticky;
    top: 0;
    background: var(--bg-secondary);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    z-index: 5;
}

#txn-table td {
    font-size: 0.78rem;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    white-space: nowrap;
}

#txn-table tbody tr {
    transition: var(--transition);
}

#txn-table tbody tr:hover {
    background: rgba(99, 102, 241, 0.04);
}

#txn-table tbody tr.row-fraud {
    background: rgba(244, 63, 94, 0.04);
}

#txn-table tbody tr.row-fraud:hover {
    background: rgba(244, 63, 94, 0.08);
}

.risk-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.68rem;
    font-weight: 700;
}

.risk-high   { background: rgba(244, 63, 94, 0.15); color: var(--accent-rose);    }
.risk-medium { background: rgba(245, 158, 11, 0.15); color: var(--accent-amber);  }
.risk-low    { background: rgba(16, 185, 129, 0.15); color: var(--accent-emerald); }

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.68rem;
    font-weight: 600;
}

.status-fraud {
    background: rgba(244, 63, 94, 0.12);
    color: var(--accent-rose);
}

.status-clean {
    background: rgba(16, 185, 129, 0.12);
    color: var(--accent-emerald);
}

/* ── Patterns Grid ─────────────────────────────────────────── */
.panel-patterns {
    grid-column: 2;
    grid-row: 3;
}

.patterns-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    padding: 16px;
}

.pattern-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 16px 10px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.pattern-card:hover {
    border-color: var(--border-glow);
    background: rgba(99, 102, 241, 0.04);
}

.pattern-icon {
    font-size: 1.5rem;
    margin-bottom: 4px;
}

.pattern-value {
    font-size: 1.4rem;
    font-weight: 700;
}

.pattern-label {
    font-size: 0.68rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    font-weight: 600;
}

/* ── Footer ────────────────────────────────────────────────── */
#main-footer {
    text-align: center;
    padding: 24px 32px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.75rem;
}

.footer-tech {
    margin-top: 4px;
    font-size: 0.68rem;
    color: var(--text-muted);
    opacity: 0.6;
}

/* ── Loading ───────────────────────────────────────────────── */
.loading-placeholder {
    color: var(--text-muted);
    font-size: 0.8rem;
    padding: 24px;
    text-align: center;
}

/* ── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 1200px) {
    .main-grid {
        grid-template-columns: 1fr;
    }
    .panel-metrics  { grid-column: 1; grid-row: auto; }
    .panel-patterns { grid-column: 1; grid-row: auto; }
    .panel-transactions { grid-column: 1; }
}

@media (max-width: 768px) {
    .kpi-grid {
        grid-template-columns: 1fr 1fr;
    }
    #main-header {
        flex-direction: column;
        gap: 12px;
        padding: 12px 16px;
    }
    .main-grid, .kpi-grid {
        padding-left: 16px;
        padding-right: 16px;
    }
}

@media (max-width: 480px) {
    .kpi-grid {
        grid-template-columns: 1fr;
    }
}

/* ══════════════════════════════════════════════════════════════
   FEATURE 1: Account Search
   ══════════════════════════════════════════════════════════════ */
.search-container {
    position: relative;
    margin-left: 12px;
}
.search-container .search-icon {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}
#search-input {
    width: 260px;
    padding: 7px 12px 7px 32px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.78rem;
    outline: none;
    transition: var(--transition);
}
#search-input:focus {
    border-color: var(--accent-indigo);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
}
#search-input::placeholder { color: var(--text-muted); }
.search-results {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-top: 4px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-sm);
    max-height: 320px;
    overflow-y: auto;
    z-index: 150;
    box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}
.search-results.active { display: block; }
.search-result-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    cursor: pointer;
    transition: var(--transition);
    border-bottom: 1px solid var(--border-color);
}
.search-result-item:hover { background: rgba(99,102,241,0.08); }
.search-result-item:last-child { border-bottom: none; }
.sr-name { font-size: 0.8rem; font-weight: 600; color: var(--text-primary); }
.sr-id { font-size: 0.68rem; color: var(--text-muted); }
.sr-risk {
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 12px;
}

/* ══════════════════════════════════════════════════════════════
   INTERACTIVE TOOLS ROW
   ══════════════════════════════════════════════════════════════ */
.tools-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 20px;
    padding: 0 32px 20px;
}
.tool-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
}
.tool-card:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-card), var(--shadow-glow);
}
.tool-card h3 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text-primary);
}
.tool-desc {
    font-size: 0.72rem;
    color: var(--text-secondary);
    margin-bottom: 14px;
}
.btn-tool {
    padding: 7px 16px;
    background: var(--gradient-1);
    color: white;
    border: none;
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}
.btn-tool:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(99,102,241,0.35);
}

/* ── Feature 6: Simulate Transaction ── */
.sim-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}
.sim-form input, .sim-form button {
    width: 100%;
}
.sim-form input {
    padding: 8px 10px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.75rem;
    outline: none;
    transition: var(--transition);
}
.sim-form input:focus {
    border-color: var(--accent-indigo);
}
.sim-form input::placeholder { color: var(--text-muted); }
.sim-form .btn-tool {
    grid-column: 1 / -1;
}
.sim-result {
    margin-top: 12px;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.78rem;
    line-height: 1.5;
    animation: slide-in 0.3s ease-out;
}
.sim-result.low { background: rgba(16,185,129,0.1); border: 1px solid rgba(16,185,129,0.25); color: var(--accent-emerald); }
.sim-result.moderate { background: rgba(245,158,11,0.1); border: 1px solid rgba(245,158,11,0.25); color: var(--accent-amber); }
.sim-result.high { background: rgba(244,63,94,0.1); border: 1px solid rgba(244,63,94,0.25); color: var(--accent-rose); }
.sim-verdict {
    font-weight: 800;
    font-size: 1rem;
    margin-bottom: 4px;
}
.sim-factors { list-style: none; padding: 0; margin: 4px 0 0; }
.sim-factors li { font-size: 0.72rem; padding: 2px 0; }
.sim-factors li::before { content: "• "; }

/* ── Feature 2: Upload CSV ── */
.upload-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.78rem;
    cursor: pointer;
    transition: var(--transition);
    gap: 8px;
}
.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--accent-indigo);
    background: rgba(99,102,241,0.05);
}
.file-label {
    color: var(--accent-indigo);
    cursor: pointer;
    font-weight: 600;
    text-decoration: underline;
}
.upload-status {
    margin-top: 8px;
    font-size: 0.75rem;
    text-align: center;
}
.upload-status.success { color: var(--accent-emerald); }
.upload-status.error { color: var(--accent-rose); }

/* ── Feature 8: Subscribe ── */
.subscribe-form {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 8px;
}
.subscribe-form input, .subscribe-form select {
    padding: 8px 10px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.75rem;
    outline: none;
}
.subscribe-form input:focus, .subscribe-form select:focus {
    border-color: var(--accent-indigo);
}
.subscribe-form select {
    grid-column: 2;
    grid-row: 1;
}
.subscribe-form input[type="email"] {
    grid-column: 1;
}
.subscribe-form .btn-tool {
    grid-column: 1 / -1;
}
.subscribe-form select option {
    background: var(--bg-secondary);
}
.subscribe-status {
    margin-top: 8px;
    font-size: 0.75rem;
    text-align: center;
    color: var(--accent-emerald);
}

/* ══════════════════════════════════════════════════════════════
   FEATURE 4: Threshold Slider
   ══════════════════════════════════════════════════════════════ */
.threshold-section {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-color);
}
.threshold-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}
.threshold-title {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-primary);
}
.threshold-value {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent-indigo);
    background: rgba(99,102,241,0.12);
    padding: 2px 10px;
    border-radius: 12px;
}
.threshold-slider {
    width: 100%;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    border-radius: 3px;
    background: linear-gradient(90deg, var(--accent-emerald), var(--accent-amber), var(--accent-rose));
    outline: none;
}
.threshold-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: white;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    border: 2px solid var(--accent-indigo);
}
.threshold-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.65rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ══════════════════════════════════════════════════════════════
   FEATURE 7: Date Range Filter
   ══════════════════════════════════════════════════════════════ */
.txn-controls {
    display: flex;
    align-items: center;
    gap: 12px;
}
.date-filter {
    display: flex;
    align-items: center;
    gap: 6px;
}
.date-filter input[type="date"] {
    padding: 4px 8px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.7rem;
    outline: none;
    color-scheme: dark;
}
.date-filter input[type="date"]:focus {
    border-color: var(--accent-indigo);
}
.date-sep {
    color: var(--text-muted);
    font-size: 0.7rem;
}
.btn-date-filter {
    padding: 4px 10px;
    background: rgba(99,102,241,0.15);
    color: var(--accent-indigo);
    border: 1px solid rgba(99,102,241,0.3);
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.7rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}
.btn-date-filter:hover { background: rgba(99,102,241,0.25); }
.btn-date-clear {
    padding: 4px 8px;
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.7rem;
    cursor: pointer;
}

/* ── Feature 3: Flag Button ── */
.btn-flag {
    padding: 3px 10px;
    background: rgba(244,63,94,0.1);
    color: var(--accent-rose);
    border: 1px solid rgba(244,63,94,0.25);
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.68rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}
.btn-flag:hover {
    background: rgba(244,63,94,0.2);
    border-color: rgba(244,63,94,0.4);
}
.btn-flag.flagged {
    background: rgba(244,63,94,0.25);
    color: white;
    cursor: default;
}

/* Graph hint */
.graph-hint {
    font-size: 0.68rem;
    color: var(--accent-indigo);
    opacity: 0.7;
}

/* ══════════════════════════════════════════════════════════════
   FEATURE 5: Account Investigation Modal
   ══════════════════════════════════════════════════════════════ */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(6px);
    z-index: 500;
    justify-content: center;
    align-items: center;
}
.modal-overlay.active {
    display: flex;
}
.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius);
    padding: 28px;
    max-width: 700px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 16px 64px rgba(0,0,0,0.5);
    animation: modal-in 0.3s ease-out;
}
@keyframes modal-in {
    from { opacity: 0; transform: translateY(20px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
.modal-close {
    position: absolute;
    top: 14px;
    right: 14px;
    background: rgba(255,255,255,0.08);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 28px;
    height: 28px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}
.modal-close:hover { background: rgba(244,63,94,0.2); color: var(--accent-rose); }

/* Modal inner styles */
.modal-account-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 18px;
}
.modal-avatar {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}
.modal-avatar.safe { background: var(--gradient-3); }
.modal-avatar.risky { background: var(--gradient-2); }
.modal-name { font-size: 1.1rem; font-weight: 700; }
.modal-id { font-size: 0.72rem; color: var(--text-muted); }
.modal-risk-badge {
    display: inline-block;
    padding: 3px 12px;
    border-radius: 12px;
    font-size: 0.72rem;
    font-weight: 700;
    margin-left: auto;
}

.modal-section {
    margin-top: 16px;
}
.modal-section h4 {
    font-size: 0.82rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 6px;
}
.modal-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}
.modal-stat {
    padding: 10px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    text-align: center;
}
.modal-stat-value { font-size: 1.1rem; font-weight: 700; }
.modal-stat-label { font-size: 0.65rem; color: var(--text-secondary); text-transform: uppercase; }

.modal-connections {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}
.modal-conn {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 10px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.72rem;
    cursor: pointer;
    transition: var(--transition);
}
.modal-conn:hover { border-color: var(--border-glow); background: rgba(99,102,241,0.06); }
.modal-conn-name { font-weight: 600; color: var(--text-primary); }
.modal-conn-dir { font-size: 0.62rem; color: var(--text-muted); }

/* ── Responsive for new features ── */
@media (max-width: 1200px) {
    .tools-row { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    #search-input { width: 180px; }
    .txn-controls { flex-direction: column; align-items: flex-start; gap: 8px; }
    .tools-row { padding: 0 16px 16px; }
}

/* ══════════════════════════════════════════════════════════════
   FEATURE 11: Explainable AI Chatbot Widget
   ══════════════════════════════════════════════════════════════ */
#xai-chatbot-container {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

#xai-chat-toggle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gradient-1);
    color: white;
    border: none;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    transition: var(--transition);
    position: relative;
    z-index: 10;
}

#xai-chat-toggle:hover {
    transform: scale(1.08) translateY(-4px);
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.6);
}

.chat-tooltip {
    position: absolute;
    right: 75px;
    background: rgba(17, 24, 39, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    pointer-events: none;
    opacity: 0;
    transform: translateX(10px);
    transition: var(--transition);
    white-space: nowrap;
}

#xai-chat-toggle:hover .chat-tooltip {
    opacity: 1;
    transform: translateX(0);
}

#xai-chat-window {
    position: absolute;
    bottom: 80px;
    right: 0;
    width: 350px;
    height: 480px;
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow-card), var(--shadow-glow);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform-origin: bottom right;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.3s ease;
    opacity: 1;
    transform: scale(1);
}

#xai-chat-window.hidden {
    opacity: 0;
    transform: scale(0.6) translateY(20px);
    pointer-events: none;
}

.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    background: rgba(11, 14, 23, 0.7);
    border-bottom: 1px solid var(--border-color);
}

#xai-chat-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
}

#xai-chat-close:hover {
    color: var(--text-primary);
    transform: scale(1.1);
}

.chat-messages {
    flex: 1;
    padding: 16px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.chat-message {
    max-width: 85%;
    padding: 10px 14px;
    border-radius: 12px;
    font-size: 0.85rem;
    line-height: 1.4;
    animation: slide-up 0.3s ease;
}

@keyframes slide-up {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.chat-message.bot {
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}

.chat-message.user {
    background: var(--gradient-1);
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 4px;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

.chat-input-area {
    display: flex;
    padding: 12px;
    gap: 8px;
    border-top: 1px solid var(--border-color);
    background: rgba(11, 14, 23, 0.8);
}

#xai-chat-input {
    flex: 1;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    padding: 10px 14px;
    border-radius: 20px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.85rem;
    outline: none;
    transition: var(--transition);
}

#xai-chat-input:focus {
    border-color: var(--accent-indigo);
    background: rgba(255, 255, 255, 0.06);
}

#xai-chat-send {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gradient-1);
    color: white;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

#xai-chat-send:hover {
    transform: scale(1.1);
    box-shadow: 0 2px 10px rgba(99, 102, 241, 0.4);
}

#xai-chat-send:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 4px 8px;
    align-items: center;
}

.typing-indicator span {
    width: 6px;
    height: 6px;
    background: var(--accent-indigo);
    border-radius: 50%;
    animation: typing 1.4s infinite ease-in-out both;
}

.typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator span:nth-child(2) { animation-delay: -0.16s; }

@keyframes typing {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}