/* ==========================================================================
 * color.css — RGB Color Picker tool-specific styles
 * ==========================================================================
 *
 * All selectors are prefixed with #cp- or .cp- (color picker) to avoid
 * collisions with base styles.
 *
 * Uses existing CSS custom properties from the theme system:
 *   --color-bg-raised, --color-bg-sunken, --color-border, --color-text,
 *   --color-text-muted, --color-accent1, --color-accent2, --font-code,
 *   --transition-fast
 *
 * Table of contents:
 *   1. Picker layout (wheel + preview row)
 *   2. Canvas & wheel
 *   3. Preview swatch
 *   4. Slider groups (R/G/B)
 *   5. Range input custom styling
 *   6. Text inputs (Hex, RGB)
 *   7. Color values display
 *   8. Xterm 256-color grid
 *   9. Responsive breakpoints
 * ======================================================================== */


/* ==========================================================================
 * 1. Picker layout — wheel and preview side by side, controls below
 * ======================================================================== */

.cp-picker-row {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.cp-controls {
    width: 100%;
}


/* ==========================================================================
 * 2. Canvas & wheel
 * ======================================================================== */

.cp-wheel-wrap {
    flex: 0 0 auto;
    position: relative;
}

#cp-wheel-canvas {
    cursor: crosshair;
    display: block;
    border: none;
    box-shadow: none;
    max-width: 100%;
    touch-action: none;     /* prevent browser gestures on canvas */
}


/* ==========================================================================
 * 3. Preview swatch
 * ======================================================================== */

#cp-preview {
    /* Dimensions are set by JS to match the color wheel canvas height.
       aspect-ratio keeps it square if only one dimension is set. */
    aspect-ratio: 1 / 1;
    border: 3px solid var(--color-border);
    box-shadow: 4px 4px 0 var(--color-border);
    flex-shrink: 0;
}


/* ==========================================================================
 * 4. Slider groups (R/G/B)
 * ======================================================================== */

.cp-sliders {
    margin-bottom: 1rem;
}

.cp-slider-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.cp-slider-group label {
    width: 1.5em;
    font-weight: 700;
    font-family: var(--font-code);
    color: var(--color-text);
    flex-shrink: 0;
}

.cp-slider-group input[type="range"] {
    flex: 1;
    min-width: 0;
}

.cp-slider-group input[type="number"] {
    width: 4em;
    text-align: center;
    flex-shrink: 0;
    padding: 0.3em 0.4em;
    margin: 0;
    font-family: var(--font-code);
    font-size: 0.9rem;
}

/* Hide number input spinners for a cleaner look */
.cp-slider-group input[type="number"]::-webkit-inner-spin-button,
.cp-slider-group input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.cp-slider-group input[type="number"] {
    -moz-appearance: textfield;
}


/* -- Lightness (V) slider — visual separator from RGB channels -- */
.cp-slider-group-v {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--color-border);
}


/* ==========================================================================
 * 5. Range input custom styling — retro theme
 * ======================================================================== */

.cp-slider-group input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    height: 8px;
    background: var(--color-bg-sunken);
    border: 1px solid var(--color-border);
    border-radius: 0;
    outline: none;
    padding: 0;
    margin: 0;
}

/* Webkit track (already styled via appearance:none above) */
.cp-slider-group input[type="range"]::-webkit-slider-runnable-track {
    height: 8px;
    border: none;
    border-radius: 0;
}

/* Webkit thumb */
.cp-slider-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: var(--color-accent1);
    border: 2px solid var(--color-border);
    border-radius: 0;
    cursor: pointer;
    margin-top: -4px;
}

.cp-slider-group input[type="range"]::-webkit-slider-thumb:hover {
    background: var(--color-accent2);
}

/* Firefox track */
.cp-slider-group input[type="range"]::-moz-range-track {
    height: 8px;
    background: var(--color-bg-sunken);
    border: 1px solid var(--color-border);
    border-radius: 0;
}

/* Firefox thumb */
.cp-slider-group input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--color-accent1);
    border: 2px solid var(--color-border);
    border-radius: 0;
    cursor: pointer;
}

.cp-slider-group input[type="range"]::-moz-range-thumb:hover {
    background: var(--color-accent2);
}

/* Focus ring on slider */
.cp-slider-group input[type="range"]:focus-visible {
    outline: 2px solid var(--color-accent1);
    outline-offset: 2px;
}


/* ==========================================================================
 * 6. Text inputs (Hex, RGB)
 * ======================================================================== */

.cp-text-inputs {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.cp-text-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.cp-text-group label {
    font-weight: 700;
    font-family: var(--font-code);
    color: var(--color-text);
    flex-shrink: 0;
    font-size: 0.9rem;
}

.cp-text-group input[type="text"] {
    width: 10em;
    padding: 0.3em 0.5em;
    margin: 0;
    font-family: var(--font-code);
    font-size: 0.9rem;
}


/* ==========================================================================
 * 7. Color values display (read-only)
 * ======================================================================== */

#cp-values {
    font-family: var(--font-code);
    font-size: 0.9rem;
    line-height: 1.8;
    color: var(--color-text-muted);
    background: var(--color-bg-sunken);
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
}

#cp-values span {
    display: block;
}

/* Labels within the values display */
.cp-val-label {
    color: var(--color-accent1);
    font-weight: 700;
}


/* ==========================================================================
 * 8. Xterm 256-color grid
 * ======================================================================== */

#cp-xterm-grid {
    /* Container for all xterm sections */
}

.cp-xterm-label {
    font-family: var(--font-code);
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-top: 0.75rem;
    margin-bottom: 0.25rem;
}

.cp-xterm-row {
    display: flex;
    flex-wrap: wrap;
}

.cp-xterm-cube-wrap {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.cp-xterm-cube-block {
    display: flex;
    flex-wrap: wrap;
    width: calc(6 * 36px);   /* 6 cells wide */
}

.cp-xterm-cell {
    width: 36px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
    font-family: var(--font-code);
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color var(--transition-fast),
                box-shadow var(--transition-fast),
                transform var(--transition-fast);
    user-select: none;
    position: relative;
}

.cp-xterm-cell:hover {
    border-color: var(--color-text);
    box-shadow: 2px 2px 0 var(--color-text);
    transform: scale(1.15);
    z-index: 1;
}

.cp-xterm-nearest {
    border-color: #E7E247 !important;
    box-shadow: 2px 2px 0 #E7E247;
    transform: scale(1.2);
    z-index: 2;
}

.cp-xterm-exact {
    border-color: #FF4444 !important;
    box-shadow: 2px 2px 0 #FF4444;
    transform: scale(1.2);
    z-index: 2;
}


/* ==========================================================================
 * 9. Responsive breakpoints
 * ======================================================================== */

@media screen and (max-width: 768px) {
    .cp-picker-row {
        flex-direction: column;
        align-items: center;
    }

    /* #cp-preview dimensions are handled by JS to match the wheel canvas */

    .cp-xterm-cell {
        width: 28px;
        height: 22px;
        font-size: 0.55rem;
    }

    .cp-xterm-cube-block {
        width: calc(6 * 28px);
    }

    .cp-text-inputs {
        flex-direction: column;
    }
}

@media screen and (max-width: 480px) {
    .cp-xterm-cell {
        width: 22px;
        height: 18px;
        font-size: 0.5rem;
    }

    .cp-xterm-cube-block {
        width: calc(6 * 22px);
    }

    .cp-slider-group {
        gap: 0.5rem;
    }
}