/* ===== SUBCHARTS CONTAINER ===== */
.subcharts-container {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

/* ===== INDIVIDUAL SUBCHART ===== */
.subchart {
    position: relative;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: border-color 0.2s ease, opacity 0.2s ease;
}

.subchart.collapsed {
    height: 30px !important;
}

/* Drag states */
.subchart.dragging {
    opacity: 0.5;
    border: 2px dashed var(--primary-color);
}

.subchart.drag-over-top {
    border-top: 3px solid var(--primary-color);
}

.subchart.drag-over-bottom {
    border-bottom: 3px solid var(--primary-color);
}

/* ===== SUBCHART HEADER ===== */
.subchart-header {
    display: flex;
    align-items: center;
    padding: 0.4rem 0.75rem;
    background: var(--bg-tertiary);
    user-select: none;
}

.subchart.collapsed .subchart-header {
    border-bottom: none;
}

.subchart-drag-handle {
    cursor: grab;
    padding: 4px 8px;
    margin-right: 8px;
    color: var(--text-secondary);
    font-size: 14px;
    letter-spacing: 2px;
    opacity: 0.6;
    transition: opacity 0.2s ease, color 0.2s ease;
}

.subchart-drag-handle:hover {
    opacity: 1;
    color: var(--primary-color);
}

.subchart-drag-handle:active {
    cursor: grabbing;
}

.subchart-title {
    flex: 1;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.subchart-header-buttons {
    display: flex;
    gap: 4px;
}

.subchart-collapse-btn {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.subchart-collapse-btn:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
}

.collapse-icon {
    line-height: 1;
    user-select: none;
}

/* ===== SUBCHART CHART AREA ===== */
.subchart-chart-area {
    position: relative;
    width: 100%;
    padding: 8px 10px 12px 10px;
    background: var(--bg-tertiary);
    overflow: visible;
}

.subchart.collapsed .subchart-chart-area {
    display: none;
}

.subchart-svg {
    display: block;
    width: 100%;
    border-radius: 8px;
}

/* ===== SUBCHART AXIS STYLING ===== */
.subchart-main-group .x-axis text,
.subchart-main-group .y-axis text,
.subchart-main-group .subchart-x-axis text,
.subchart-main-group .subchart-y-axis text {
    fill: var(--text-secondary);
    font-size: 11px;
    font-weight: 500;
}

.subchart-main-group .x-axis path,
.subchart-main-group .x-axis line,
.subchart-main-group .y-axis path,
.subchart-main-group .y-axis line,
.subchart-main-group .subchart-x-axis path,
.subchart-main-group .subchart-x-axis line,
.subchart-main-group .subchart-y-axis path,
.subchart-main-group .subchart-y-axis line {
    stroke: var(--border-color);
}

.subchart-main-group .grid line,
.subchart-main-group .subchart-grid line {
    stroke: var(--border-color);
    stroke-dasharray: 2, 2;
    opacity: 0.5;
}

.subchart-main-group .grid path,
.subchart-main-group .subchart-grid path {
    stroke-width: 0;
}

/* ===== A/D LINE STYLES ===== */
.accum-dist-line {
    fill: none;
    stroke-width: 2;
    opacity: 0.9;
    pointer-events: none;
}

/* ===== MFI LINE STYLES ===== */
.mfi-line {
    fill: none;
    stroke-width: 2;
    opacity: 0.9;
    pointer-events: none;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .subchart-header {
        padding: 0.3rem 0.5rem;
    }
    
    .subchart-title {
        font-size: 0.75rem;
    }
    
    .subchart-chart-area {
        padding: 0.3rem;
    }
    
    .subchart-drag-handle {
        padding: 2px 4px;
        margin-right: 4px;
    }
}