/* Layout Styles: Toolbar, Containers, Grid, Diff Output */

/* Toolbar */
.toolbar {
    height: var(--toolbar-height);
    background-color: transparent;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    flex-shrink: 0;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.brand h1 {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.025em;
}

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

.divider {
    width: 1px;
    height: 24px;
    background-color: var(--border-color);
    margin: 0 0.25rem;
}

/* Main Layout */
.diff-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding: 0 1.5rem 1.5rem 1.5rem;
    width: 100%;
    min-width: 1200px;
    margin: 0 auto;
}

/* Input Grid */
.panel-group.inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    height: 400px;
}

.inputs .panel {
    height: 100%;
}

.panel.output-panel {
    height: auto;
    min-height: 80px;
}

.header-left,
.header-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.header-actions {
    gap: 0.75rem;
}


/* Text Areas & Content Wrappers */
.input-wrapper {
    /* Context for absolute positioning of drop-overlay */
    position: relative;
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-height: 0;
}

textarea {
    flex: 1;
    width: 100%;
    resize: none;
    border: none;
    padding: 1rem;
    background-color: transparent;
    color: var(--text-main);
    font-family: 'Consolas', 'Monaco', 'Courier New', 'Noto Sans JP', monospace;
    font-size: var(--font-size-base);
    outline: none;
    line-height: 1.5;
}

/* Output Content */
.diff-content {
    padding: 1rem;
    font-family: 'Consolas', 'Monaco', 'Courier New', 'Noto Sans JP', monospace;
    font-size: var(--font-size-base);
    white-space: pre-wrap;
    line-height: 1.5;
    overflow: visible;
    content-visibility: auto;
    contain-intrinsic-size: 1000px;
    contain: layout paint style;
}

/* Diff Logic Styles */
.diff-add {
    background-color: var(--diff-add-bg);
    color: var(--diff-add-text);
    text-decoration: none;
}

.diff-del {
    background-color: var(--diff-del-bg);
    color: var(--diff-del-text);
    text-decoration: line-through;
    opacity: 0.8;
}

.diff-separator {
    display: block;
    height: auto;
    padding: 4px 0;
    width: 100%;
    margin: 0;
    clear: both;
    user-select: none;
    text-align: left;
    padding-left: 10px;
    font-size: 0.8em;
    color: #666;
    background-color: rgba(128, 128, 128, 0.1);
}

[data-theme="dark"] .diff-separator {
    color: #888;
    background-color: rgba(255, 255, 255, 0.05);
}

/* Drag Overlay */
.drop-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    background: var(--drop-overlay-bg);
    z-index: var(--z-drop-overlay);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    border-radius: inherit;
}

.input-wrapper.drag-active .drop-overlay {
    opacity: 1;
}

.drop-icon {
    width: 120px;
    height: 120px;
    color: var(--primary);
    margin-bottom: 1rem;
}

.drop-text {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary);
}

/* Stats */
.diff-stats {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
}

.stat-item {
    padding: 0 0.5rem;
}

.stat-divider {
    color: var(--border-color);
}

/* Load More */
.load-more-container {
    padding: 1rem;
    display: flex;
    justify-content: center;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-panel);
}

/* Mobile */
@media (max-width: 768px) {
    .panel-group.inputs {
        grid-template-columns: 1fr;
        height: auto;
    }

    .inputs .panel {
        min-height: 300px;
    }

    .diff-container {
        padding: 1rem;
    }
}