/* ============================================
   Screen PPI Tool Styles
   Extends the main design system
   ============================================ */

/* Tool Layout */
.tool-main {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.tool-header {
    padding: calc(var(--space-20) + var(--space-8)) var(--space-8) var(--space-12);
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-elevated) 100%);
    border-bottom: 1px solid var(--color-border-subtle);
}

.tool-header-content {
    max-width: var(--max-width);
    margin: 0 auto;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-4);
    transition: color var(--transition-fast);
}

.back-link:hover {
    color: var(--color-accent);
}

.tool-title {
    font-family: var(--font-display);
    font-size: clamp(var(--text-2xl), 5vw, var(--text-4xl));
    font-weight: 400;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-3);
}

.tool-desc {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    max-width: 540px;
}

/* Tool Controls */
.tool-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-4);
    padding: var(--space-6) var(--space-8);
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
}

.controls-left,
.controls-right {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-wrap: wrap;
}

/* Ghost button variant */
.btn-ghost {
    background-color: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
}

.btn-ghost:hover {
    background-color: var(--color-bg-subtle);
    color: var(--color-text);
    border-color: var(--color-text-muted);
}

.btn-danger-text {
    color: #ef4444;
}

.btn-danger-text:hover {
    background-color: rgba(239, 68, 68, 0.1);
    border-color: #ef4444;
    color: #ef4444;
}

/* Form Elements */
.select {
    padding: var(--space-2) var(--space-4);
    padding-right: var(--space-8);
    font-size: var(--text-sm);
    font-family: var(--font-body);
    color: var(--color-text);
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='12' viewBox='0 0 12 12' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M3 4.5L6 7.5L9 4.5' stroke='%2371717a' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    transition: all var(--transition-fast);
}

.select:hover {
    border-color: var(--color-text-muted);
}

.select:focus {
    outline: none;
    border-color: var(--color-accent);
}

.select-sm {
    padding: var(--space-1) var(--space-3);
    padding-right: var(--space-6);
    font-size: var(--text-xs);
}

.input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-sm);
    font-family: var(--font-body);
    color: var(--color-text);
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

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

.input::placeholder {
    color: var(--color-text-muted);
}

/* Comparison Grid */
.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-5);
    padding: var(--space-6) var(--space-8);
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
}

/* Screen Card */
.screen-card {
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.screen-card:hover {
    border-color: var(--color-text-muted);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--color-border-subtle);
    background-color: var(--color-bg-subtle);
}

.card-header .screen-name {
    flex: 1;
    font-size: var(--text-base);
    font-weight: 600;
    font-family: var(--font-body);
    color: var(--color-text);
    border: none;
    background: transparent;
    padding: 0;
}

.card-header .screen-name:focus {
    outline: none;
}

.btn-remove {
    width: 28px;
    height: 28px;
    padding: 0;
    font-size: var(--text-lg);
    color: var(--color-text-muted);
    background: transparent;
    border: none;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-remove:hover {
    color: #ef4444;
    background-color: rgba(239, 68, 68, 0.1);
}

.card-inputs {
    padding: var(--space-5);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.input-row {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.input-row label {
    min-width: 80px;
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.input-row input,
.input-row select {
    flex: 1;
}

.input-row .input-small {
    width: 80px;
    flex: none;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    font-family: 'JetBrains Mono', monospace;
    text-align: right;
}

.input-row .separator {
    color: var(--color-text-muted);
    font-size: var(--text-sm);
}

/* Card Results */
.card-results {
    padding: var(--space-5);
    background-color: var(--color-bg-subtle);
    border-top: 1px solid var(--color-border-subtle);
}

.result-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
}

.result-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.result-label {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.result-value {
    font-size: var(--text-lg);
    font-weight: 600;
    font-family: 'JetBrains Mono', monospace;
    color: var(--color-text);
}

/* PPI Rating Colors */
.result-value.ppi-low { color: #f87171; }
.result-value.ppi-medium { color: #fbbf24; }
.result-value.ppi-high { color: #4ade80; }

/* PPI Bar */
.ppi-bar-container {
    grid-column: 1 / -1;
    margin-top: var(--space-2);
}

.ppi-bar-label {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    margin-bottom: var(--space-2);
}

.ppi-bar {
    height: 6px;
    background-color: var(--color-border);
    border-radius: 3px;
    overflow: hidden;
}

.ppi-bar-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.3s ease, background-color 0.3s ease;
}

/* Equivalent Display */
.equivalent-display {
    grid-column: 1 / -1;
    padding: var(--space-3) var(--space-4);
    margin-top: var(--space-3);
    background-color: var(--color-bg-elevated);
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.equivalent-display strong {
    color: var(--color-accent);
}

/* Size Comparison Section */
.size-comparison {
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin: var(--space-6) var(--space-8);
    max-width: calc(var(--max-width) - var(--space-16));
    margin-left: auto;
    margin-right: auto;
    overflow: hidden;
}

.size-comparison-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-4);
    padding: var(--space-5) var(--space-6);
    border-bottom: 1px solid var(--color-border-subtle);
    background-color: var(--color-bg-subtle);
}

.size-comparison-header h2 {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 400;
}

.size-comparison-controls {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    flex-wrap: wrap;
}

.control-group {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.control-label {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

/* Toggle Group */
.toggle-group {
    display: flex;
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.toggle-btn {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-xs);
    font-weight: 500;
    font-family: var(--font-body);
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.toggle-btn:hover {
    color: var(--color-text);
    background-color: var(--color-bg-subtle);
}

.toggle-btn.active {
    background-color: var(--color-accent);
    color: white;
}

/* Zoom Slider */
.zoom-slider {
    width: 80px;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--color-border);
    border-radius: 2px;
    cursor: pointer;
}

.zoom-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    background: var(--color-accent);
    border-radius: 50%;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.zoom-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.zoom-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background: var(--color-accent);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.zoom-value {
    font-size: var(--text-xs);
    font-family: 'JetBrains Mono', monospace;
    color: var(--color-text-muted);
    min-width: 70px;
}

/* Viewport */
.size-comparison-viewport-wrapper {
    position: relative;
}

.size-comparison-viewport {
    overflow: auto;
    background-color: var(--color-bg);
    background-image:
        linear-gradient(var(--color-border-subtle) 1px, transparent 1px),
        linear-gradient(90deg, var(--color-border-subtle) 1px, transparent 1px);
    background-size: 20px 20px;
    min-height: 200px;
    height: 400px;
    position: relative;
}

/* Overflow Shadows */
.size-comparison-viewport.has-overflow-right::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 40px;
    background: linear-gradient(to right, transparent, rgba(0,0,0,0.2));
    pointer-events: none;
    z-index: 50;
}

.size-comparison-viewport.has-overflow-bottom::before {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 40px;
    background: linear-gradient(to bottom, transparent, rgba(0,0,0,0.2));
    pointer-events: none;
    z-index: 50;
}

/* Resize Handle */
.resize-handle {
    height: 8px;
    background: var(--color-bg-subtle);
    border-top: 1px solid var(--color-border-subtle);
    cursor: ns-resize;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast);
}

.resize-handle::after {
    content: '';
    width: 40px;
    height: 3px;
    background: var(--color-border);
    border-radius: 2px;
}

.resize-handle:hover {
    background: var(--color-border-subtle);
}

/* Canvas */
.size-comparison-canvas {
    position: relative;
    min-width: max-content;
    min-height: max-content;
    padding: 20px;
}

.size-comparison-canvas.auto-arrange {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: var(--space-6);
    padding: var(--space-8);
}

.size-comparison-canvas.free-arrange {
    display: block;
}

/* Screen Rectangles */
.screen-rect {
    background: linear-gradient(135deg, var(--screen-color) 0%, var(--screen-color-dark) 100%);
    border: 2px solid var(--screen-border);
    border-radius: 4px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    user-select: none;
}

.screen-rect.draggable {
    position: absolute;
    cursor: grab;
    transition: box-shadow 0.2s ease;
}

.screen-rect.draggable:hover {
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.screen-rect.dragging {
    cursor: grabbing;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
    z-index: 100 !important;
    opacity: 0.95;
}

/* Screen Rect Actions */
.screen-rect-actions {
    position: absolute;
    top: 4px;
    right: 4px;
    display: flex;
    gap: 2px;
    opacity: 0;
    transition: opacity var(--transition-fast);
    z-index: 10;
}

.screen-rect:hover .screen-rect-actions {
    opacity: 1;
}

.screen-action-btn {
    width: 24px;
    height: 24px;
    padding: 0;
    border: none;
    border-radius: 4px;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    font-size: 11px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-fast);
}

.screen-action-btn:hover {
    background: rgba(0, 0, 0, 0.8);
}

.screen-action-btn[data-action="delete"]:hover {
    background: #ef4444;
}

/* Auto-arrange modes */
.auto-arrange .screen-rect {
    position: relative;
}

.auto-arrange.overlap-center,
.auto-arrange.overlap-corner {
    display: block;
    padding: var(--space-8);
}

.auto-arrange.stacked {
    flex-direction: column;
    align-items: center;
}

.auto-arrange.overlap-center .screen-rect,
.auto-arrange.overlap-corner .screen-rect {
    position: absolute;
}

.auto-arrange.overlap-center .screen-rect {
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

.auto-arrange.overlap-corner .screen-rect {
    left: var(--space-8);
    bottom: var(--space-8);
}

/* Snap Guides */
.snap-guide {
    position: absolute;
    background-color: var(--color-accent);
    pointer-events: none;
    z-index: 200;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.snap-guide.visible {
    opacity: 1;
}

.snap-guide.horizontal {
    height: 1px;
    left: 0;
    right: 0;
}

.snap-guide.vertical {
    width: 1px;
    top: 0;
    bottom: 0;
}

/* Screen Labels */
.screen-rect-label {
    font-size: 11px;
    font-weight: 600;
    font-family: var(--font-body);
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
    text-align: center;
    padding: var(--space-1) var(--space-2);
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    cursor: pointer;
    border-radius: 3px;
    transition: background-color var(--transition-fast);
}

.screen-rect-label:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.screen-rect-label-input {
    font-size: 11px;
    font-weight: 600;
    font-family: var(--font-body);
    color: var(--color-text);
    text-align: center;
    padding: var(--space-1) var(--space-2);
    max-width: 100%;
    border: none;
    border-radius: 3px;
    background: white;
    outline: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.screen-rect-size {
    font-size: 10px;
    font-family: 'JetBrains Mono', monospace;
    color: rgba(255, 255, 255, 0.8);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

/* Legend */
.size-comparison-legend {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--color-border-subtle);
    background-color: var(--color-bg-subtle);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
}

.legend-color {
    width: 14px;
    height: 14px;
    border-radius: 3px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.legend-text {
    color: var(--color-text-secondary);
}

.legend-text strong {
    color: var(--color-text);
}

/* Saved Configurations */
.saved-configs {
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin: var(--space-6) var(--space-8);
    max-width: calc(var(--max-width) - var(--space-16));
    margin-left: auto;
    margin-right: auto;
    padding: var(--space-6);
}

.saved-configs h2 {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 400;
    margin-bottom: var(--space-5);
}

.saved-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.saved-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) var(--space-5);
    background-color: var(--color-bg-subtle);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.saved-item:hover {
    background-color: var(--color-border-subtle);
}

.saved-item-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.saved-item-name {
    font-weight: 500;
    color: var(--color-text);
}

.saved-item-meta {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

.saved-item-actions {
    display: flex;
    gap: var(--space-2);
}

.empty-state {
    text-align: center;
    padding: var(--space-8);
    color: var(--color-text-muted);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 200;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    backdrop-filter: blur(4px);
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-lg);
}

.modal-content h3 {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 400;
    margin-bottom: var(--space-5);
}

.modal-content .input {
    margin-bottom: var(--space-5);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
}

/* Tool Footer */
.tool-footer {
    margin-top: auto;
}

/* Responsive */
@media (max-width: 900px) {
    .size-comparison-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .size-comparison-controls {
        width: 100%;
    }
}

@media (max-width: 640px) {
    .tool-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .controls-left,
    .controls-right {
        justify-content: center;
    }

    .comparison-grid {
        grid-template-columns: 1fr;
        padding: var(--space-4);
    }

    .size-comparison {
        margin: var(--space-4);
        border-radius: var(--radius-md);
    }

    .saved-configs {
        margin: var(--space-4);
    }

    .size-comparison-controls {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.screen-card {
    animation: fadeIn 0.3s ease;
}