/* ============================================
   TOOLS — shared layout
   ============================================ */

.tool-page {
    max-width: 900px;
    margin: 0 auto;
}

.tool-page__header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.tool-page__title {
    font-size: var(--text-3xl);
    margin-bottom: var(--space-sm);
}

.tool-page__desc {
    color: var(--color-text-secondary);
    font-size: var(--text-base);
}

.tool-area {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--card-radius);
    padding: var(--space-xl);
}

.tool-area + .tool-area {
    margin-top: var(--space-lg);
}

/* ============================================
   PALETTE GENERATOR
   ============================================ */

.palette-dropzone {
    border: 2px dashed var(--color-border);
    border-radius: var(--card-radius);
    padding: var(--space-3xl);
    text-align: center;
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.palette-dropzone:hover,
.palette-dropzone.drag-over {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: var(--color-accent-subtle);
}

.palette-preview {
    display: none;
    margin-top: var(--space-lg);
}

.palette-preview.visible {
    display: block;
}

.palette-image-wrap {
    border-radius: var(--radius-sm);
    overflow: hidden;
    max-height: 400px;
    margin-bottom: var(--space-lg);
}

.palette-image-wrap img {
    width: 100%;
    object-fit: contain;
    max-height: 400px;
}

.palette-colors {
    display: flex;
    border-radius: var(--card-radius);
    overflow: hidden;
    height: 80px;
    margin-bottom: var(--space-lg);
}

.palette-swatch {
    flex: 1;
    cursor: pointer;
    position: relative;
    transition: flex var(--transition-fast);
}

.palette-swatch:hover {
    flex: 1.5;
}

.palette-swatch__label {
    position: absolute;
    bottom: 6px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 10px;
    font-family: var(--font-mono);
    color: rgba(255,255,255,0.8);
    text-shadow: 0 1px 3px rgba(0,0,0,0.5);
    white-space: nowrap;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.palette-swatch:hover .palette-swatch__label {
    opacity: 1;
}

.palette-table {
    width: 100%;
    border-collapse: collapse;
}

.palette-table th {
    text-align: left;
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-sm);
    border-bottom: 1px solid var(--color-border);
}

.palette-table td {
    padding: var(--space-sm);
    font-size: var(--text-sm);
    font-family: var(--font-mono);
    border-bottom: 1px solid var(--color-border);
}

.palette-table__dot {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: inline-block;
    vertical-align: middle;
}

.palette-table__copy {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.palette-table__copy:hover {
    color: var(--color-accent);
}

.palette-export {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
    flex-wrap: wrap;
}

/* ============================================
   DRAWING IDEAS
   ============================================ */

.idea-card {
    text-align: center;
    padding: var(--space-3xl) var(--space-xl);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--card-radius);
    margin-bottom: var(--space-xl);
}

.idea-card__prompt {
    font-size: var(--text-2xl);
    font-weight: var(--weight-bold);
    margin-bottom: var(--space-md);
    line-height: var(--leading-tight);
}

.idea-card__details {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
}

.idea-card__difficulty {
    display: inline-block;
    padding: 0.3em 0.8em;
    font-size: var(--text-xs);
    font-weight: var(--weight-semibold);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-lg);
}

.idea-card__difficulty--quick { background: #34d399; color: #000; }
.idea-card__difficulty--study { background: #fbbf24; color: #000; }
.idea-card__difficulty--full  { background: #f87171; color: #000; }

.idea-settings {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-lg);
}

.idea-history {
    margin-top: var(--space-xl);
}

.idea-history__item {
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-border);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

/* ============================================
   GESTURE TIMER
   ============================================ */

.gesture-setup {
    text-align: center;
}

.gesture-intervals {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin: var(--space-xl) 0;
}

.gesture-session-builder {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    max-width: 400px;
    margin: 0 auto var(--space-xl);
}

.gesture-session-row {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
}

.gesture-session-row input {
    width: 60px;
    text-align: center;
}

.gesture-active {
    display: none;
    text-align: center;
    padding: var(--space-3xl);
}

.gesture-active.visible {
    display: block;
}

.gesture-timer-display {
    font-size: 6rem;
    font-weight: var(--weight-bold);
    font-variant-numeric: tabular-nums;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
    font-family: var(--font-mono);
}

.gesture-progress-text {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
}

.gesture-progress-bar {
    width: 100%;
    height: 4px;
    background: var(--color-border);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: var(--space-xl);
}

.gesture-progress-bar__fill {
    height: 100%;
    background: var(--color-accent);
    border-radius: 2px;
    transition: width 1s linear;
}

.gesture-controls {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
}

/* ============================================
   CONTRAST CHECKER
   ============================================ */

.contrast-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.contrast-input-group label {
    display: block;
    font-size: var(--text-xs);
    font-weight: var(--weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
}

.contrast-color-pick {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
}

.contrast-color-pick input[type="color"] {
    width: 48px;
    height: 48px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    background: none;
    padding: 2px;
}

.contrast-color-pick input[type="text"] {
    flex: 1;
}

.contrast-preview {
    border-radius: var(--card-radius);
    padding: var(--space-2xl);
    text-align: center;
    margin-bottom: var(--space-xl);
    transition: all var(--transition-fast);
}

.contrast-preview__text {
    font-size: var(--text-2xl);
    font-weight: var(--weight-bold);
    margin-bottom: var(--space-sm);
}

.contrast-preview__small {
    font-size: var(--text-sm);
}

.contrast-result {
    text-align: center;
}

.contrast-ratio {
    font-size: var(--text-4xl);
    font-weight: var(--weight-bold);
    margin-bottom: var(--space-md);
}

.contrast-badges {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

.contrast-badge {
    padding: 0.4em 1em;
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: var(--weight-semibold);
}

.contrast-badge--pass { background: #34d399; color: #000; }
.contrast-badge--fail { background: #f87171; color: #000; }

/* ============================================
   REFERENCE BOARD
   ============================================ */

.board-toolbar {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.board-canvas {
    width: 100%;
    min-height: 500px;
    background: var(--color-bg-elevated);
    border: 2px dashed var(--color-border);
    border-radius: var(--card-radius);
    position: relative;
    overflow: hidden;
}

.board-canvas.drag-over {
    border-color: var(--color-accent);
    background: var(--color-accent-subtle);
}

.board-item {
    position: absolute;
    cursor: move;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: border-color var(--transition-fast);
}

.board-item:hover,
.board-item.selected {
    border-color: var(--color-accent);
}

.board-item img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    pointer-events: none;
}

.board-item__remove {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 24px;
    height: 24px;
    background: rgba(0,0,0,0.7);
    color: #fff;
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    cursor: pointer;
}

.board-item:hover .board-item__remove {
    display: flex;
}

.board-empty {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
}

@media (max-width: 640px) {
    .contrast-inputs {
        grid-template-columns: 1fr;
    }

    .gesture-timer-display {
        font-size: 4rem;
    }

    .tool-page__title {
        font-size: var(--text-2xl);
    }
}