/* Shades generator tool: mobile-first */
.sg-tool {
    --sg-bg: #ffffff;
    --sg-surface: #f1f5f9;
    --sg-border: #e2e8f0;
    --sg-text: #0f172a;
    --sg-muted: #64748b;
    --sg-accent: #0ea5e9;
    --sg-accent-hover: #0284c7;
    --sg-accent-on: #ffffff;
    --sg-radius: 14px;
    --sg-radius-sm: 10px;
    --sg-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    --sg-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    background: var(--sg-bg);
    border: 1px solid var(--sg-border);
    border-radius: var(--sg-radius);
    padding: 1.25rem;
    margin-bottom: 2rem;
    box-shadow: var(--sg-shadow);
}

@media (min-width: 768px) {
    .sg-tool {
        padding: 1.75rem 2rem;
        box-shadow: var(--sg-shadow-md);
    }
}

/* Panel */
.sg-panel {
    margin-bottom: 1.5rem;
}

.sg-panel-title {
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--sg-muted);
    margin: 0 0 0.75rem 0;
}

/* Base color pick */
.sg-pick-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
}

.sg-swatch-wrap {
    position: relative;
    flex-shrink: 0;
}

.sg-color-picker {
    position: absolute;
    width: 100%;
    height: 100%;
    padding: 0;
    border: none;
    border-radius: var(--sg-radius-sm);
    cursor: pointer;
    opacity: 0;
    inset: 0;
}

.sg-color-picker:focus-visible {
    outline: 2px solid var(--sg-accent);
    outline-offset: 2px;
}

.sg-preview {
    display: block;
    width: 56px;
    height: 56px;
    border-radius: var(--sg-radius-sm);
    border: 2px solid var(--sg-border);
    background: #3498db;
    pointer-events: none;
}

@media (min-width: 480px) {
    .sg-preview {
        width: 64px;
        height: 64px;
    }
}

.sg-hex-wrap {
    flex: 1;
    min-width: 0;
}

.sg-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--sg-muted);
    margin-bottom: 0.35rem;
}

.sg-hex-input {
    width: 100%;
    max-width: 140px;
    padding: 0.6rem 0.75rem;
    font-size: 0.9375rem;
    
    border: 1px solid var(--sg-border);
    border-radius: var(--sg-radius-sm);
    background: var(--sg-bg);
    color: var(--sg-text);
}

.sg-hex-input:focus {
    outline: none;
    border-color: var(--sg-accent);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15);
}

/* Options grid */
.sg-options-grid {
    display: grid;
    gap: 1.25rem;
}

@media (min-width: 640px) {
    .sg-options-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 900px) {
    .sg-options-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.sg-option {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.sg-option-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--sg-text);
}

.sg-option-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.sg-range {
    flex: 1;
    min-width: 0;
    height: 8px;
    -webkit-appearance: none;
    appearance: none;
    background: #d9d9d9;
    border-radius: 4px;
}

.sg-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--sg-accent);
    cursor: pointer;
    border: none;
    box-shadow: var(--sg-shadow);
}

.sg-range::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--sg-accent);
    cursor: pointer;
    border: none;
    box-shadow: var(--sg-shadow);
}

.sg-range:focus-visible {
    outline: none;
}

.sg-range:focus-visible::-webkit-slider-thumb {
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.3);
}

.sg-range:focus-visible::-moz-range-thumb {
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.3);
}

.sg-option-value {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--sg-accent);
    min-width: 2.5rem;
    text-align: right;
}

/* Actions */
.sg-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.75rem;
}

.sg-btn {
    padding: 0.65rem 1.25rem;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--sg-radius-sm);
    border: none;
    cursor: pointer;
    transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}

.sg-btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.35);
}

.sg-btn-primary {
    background: var(--sg-accent);
    color: var(--sg-accent-on);
}

.sg-btn-primary:hover {
    background: var(--sg-accent-hover);
}

.sg-btn-secondary {
    background: var(--sg-surface);
    color: var(--sg-text);
    border: 1px solid var(--sg-border);
}

.sg-btn-secondary:hover {
    background: var(--sg-border);
}

.sg-btn-ghost {
    background: transparent;
    color: var(--sg-muted);
}

.sg-btn-ghost:hover {
    color: var(--sg-text);
    background: var(--sg-surface);
}

/* Output groups */
.sg-output {
    margin-bottom: 1.75rem;
}

.sg-group {
    margin-bottom: 1.5rem;
}

.sg-group:last-child {
    margin-bottom: 0;
}

.sg-group-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--sg-muted);
    margin: 0 0 0.6rem 0;
    padding-bottom: 0.35rem;
    border-bottom: 1px solid var(--sg-border);
}

.sg-swatches {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
    gap: 0.5rem;
}

@media (min-width: 480px) {
    .sg-swatches {
        grid-template-columns: repeat(auto-fill, minmax(84px, 1fr));
        gap: 0.6rem;
    }
}

.sg-swatch {
    aspect-ratio: 1;
    border-radius: var(--sg-radius-sm);
    border: 1px solid rgba(0, 0, 0, 0.08);
    cursor: pointer;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 0.35rem;
    min-height: 72px;
    transition: transform 0.15s, box-shadow 0.15s;
}

.sg-swatch:hover {
    transform: scale(1.04);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    z-index: 1;
}

.sg-swatch:focus-visible {
    outline: 2px solid var(--sg-accent);
    outline-offset: 2px;
}

.sg-swatch-code {
    font-size: 0.625rem;
    
    color: #fff;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
    background: rgba(0, 0, 0, 0.5);
    padding: 0.2rem 0.35rem;
    border-radius: 4px;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sg-swatch[data-light="true"] .sg-swatch-code {
    color: #0f172a;
    text-shadow: none;
    background: rgba(255, 255, 255, 0.85);
}

/* Export */
.sg-export {
    padding-top: 1.25rem;
    border-top: 1px solid var(--sg-border);
}

.sg-export-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--sg-muted);
    margin-bottom: 0.6rem;
}

.sg-export-btns {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.sg-export-btn {
    padding: 0.5rem 1rem;
    font-size: 0.8125rem;
    font-weight: 500;
    border: 1px solid var(--sg-border);
    border-radius: var(--sg-radius-sm);
    background: var(--sg-bg);
    color: var(--sg-text);
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
}

.sg-export-btn:hover {
    background: var(--sg-surface);
    border-color: var(--sg-muted);
}

.sg-export-btn:focus-visible {
    outline: none;
    border-color: var(--sg-accent);
    box-shadow: 0 0 0 2px rgba(14, 165, 233, 0.2);
}

/* Info */
.sg-info {
    margin-top: 1.75rem;
    padding: 1rem 1.25rem;
    background: var(--sg-surface);
    border-radius: var(--sg-radius-sm);
}

.sg-info-title {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--sg-text);
    margin: 0 0 0.5rem 0;
}

.sg-info-list {
    font-size: 0.8125rem;
    color: var(--sg-muted);
    margin: 0;
    padding-left: 1.25rem;
    line-height: 1.6;
}

.sg-info-list strong {
    color: var(--sg-text);
}