@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #131722;
    --bg-secondary: #1e222d;
    --bg-tertiary: #2a2e39;
    --border-color: #363c4e;
    --text-primary: #d1d4dc;
    --text-secondary: #787b86;
    --text-muted: #5d606b;
    --accent-blue: #2962ff;
    --accent-green: #26a69a;
    --accent-red: #ef5350;
    --accent-purple: #ab47bc;
    --accent-cyan: #00bcd4;
    --accent-yellow: #ffeb3b;
}

html, body {
    height: 100%;
}

body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 13px;
    line-height: 1.5;
    display: flex;
    flex-direction: column;
}

/* ===== HEADER ===== */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.logo {
    font-size: 20px;
    font-weight: 700;
    color: #ff9800;
    letter-spacing: 0.5px;
}

.header-controls {
    display: flex;
    align-items: flex-end;
    gap: 16px;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.control-label {
    font-size: 10px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.control-group input[type="text"],
.control-group select {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 12px;
    font-size: 13px;
    font-family: inherit;
    border-radius: 4px;
}

.control-group input[type="text"] {
    width: 90px;
    text-transform: uppercase;
    font-weight: 500;
}

.control-group input[type="text"]:focus,
.control-group select:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.control-group input[type="text"]::placeholder {
    color: var(--text-muted);
    text-transform: none;
}

.control-group select {
    cursor: pointer;
}

.weight-control {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.weight-input-box {
    display: flex;
    align-items: center;
    gap: 4px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    padding: 6px 10px;
    border-radius: 4px;
}

.weight-input-box input {
    background: transparent;
    border: none;
    color: var(--text-primary);
    width: 36px;
    font-size: 13px;
    font-family: inherit;
    text-align: center;
}

.weight-input-box input:focus {
    outline: none;
}

.weight-input-box span {
    color: var(--text-muted);
    font-size: 12px;
}

.run-btn {
    background: var(--accent-blue);
    border: none;
    color: #fff;
    padding: 10px 20px;
    font-size: 13px;
    font-weight: 600;
    font-family: inherit;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.15s;
}

.run-btn:hover {
    background: #1e53e4;
}

.run-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ===== STATS BAR ===== */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    padding: 16px 24px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    gap: 16px;
}

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

.stat-label {
    font-size: 10px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.stat-value {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.stat-value.positive { color: var(--accent-green); }
.stat-value.negative { color: var(--accent-red); }
.stat-value.low { color: var(--accent-green); }
.stat-value.moderate { color: var(--accent-yellow); }
.stat-value.high { color: var(--accent-red); }
.stat-value.cyan { color: var(--accent-cyan); }
.stat-value.purple { color: var(--accent-purple); }

/* ===== MAIN LAYOUT ===== */
.main-layout {
    display: flex;
    flex: 1;
    min-height: 0;
}

/* ===== CHART PANEL ===== */
.chart-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
    min-width: 0;
}

.chart-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.chart-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.chart-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.chart-container {
    flex: 1;
    padding: 12px;
    min-height: 0;
    position: relative;
}

.chart-container canvas {
    width: 100% !important;
    height: 100% !important;
}

/* ===== SIGNALS PANEL ===== */
.signals-panel {
    width: 340px;
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    flex-shrink: 0;
}

.signals-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.signals-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
}

.filter-group {
    display: flex;
    gap: 4px;
}

.filter-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 4px 10px;
    font-size: 11px;
    font-family: inherit;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.15s;
}

.filter-btn:hover {
    border-color: var(--text-secondary);
    color: var(--text-primary);
}

.filter-btn.active {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: #fff;
}

.signals-list {
    flex: 1;
    overflow-y: auto;
}

.signal-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background 0.15s;
}

.signal-item:hover {
    background: var(--bg-tertiary);
}

.signal-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.signal-dot.absorption { background: var(--accent-cyan); }
.signal-dot.vwap { background: var(--accent-purple); }

.signal-content {
    flex: 1;
    min-width: 0;
}

.signal-time {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.signal-desc {
    font-size: 11px;
    color: var(--text-secondary);
}

.signal-meta {
    text-align: right;
    flex-shrink: 0;
}

.signal-type {
    font-size: 10px;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 3px;
    margin-bottom: 4px;
    display: inline-block;
}

.signal-type.absorption {
    background: rgba(0, 188, 212, 0.15);
    color: var(--accent-cyan);
}

.signal-type.vwap {
    background: rgba(171, 71, 188, 0.15);
    color: var(--accent-purple);
}

.signal-volume {
    font-size: 12px;
    font-weight: 600;
    color: var(--accent-green);
}

.empty-state {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 200px;
    color: var(--text-muted);
    font-size: 13px;
}

/* ===== MODAL ===== */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    width: 500px;
    max-width: 90%;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
    line-height: 1;
    padding: 4px;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
}

.modal-row {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.modal-row:last-of-type {
    border-bottom: none;
}

.modal-label {
    color: var(--text-secondary);
    font-size: 15px;
}

.modal-value {
    color: var(--text-primary);
    font-weight: 500;
    font-size: 15px;
}

.modal-note {
    margin-top: 20px;
    padding: 16px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-color);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1000px) {
    .main-layout {
        flex-direction: column;
    }
    
    .chart-panel {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .signals-panel {
        width: 100%;
        max-height: 300px;
    }
    
    .header {
        flex-wrap: wrap;
        gap: 12px;
    }
    
    .header-controls {
        flex-wrap: wrap;
    }
    
    .stats-bar {
        grid-template-columns: repeat(4, 1fr);
    }
}