/**
 * Color Picker App Styles
 *
 * A comprehensive color picker with responsive, accessible design
 * Features: Color picker, image extraction, harmonies, palette builder, contrast checker, gradient generator
 */

/* ========================================
   CRITICAL: App Container Centering
   The app container MUST be centered on the page.
   ======================================== */

.cp-container {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
}

/* ========================================
   Main Color Picker App
   ======================================== */

.cp-app {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

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

@media (min-width: 768px) {
    .cp-main {
        grid-template-columns: 1fr 320px;
        gap: var(--space-6);
        padding: var(--space-6);
    }
}

/* ========================================
   Color Picker Section (Left)
   ======================================== */

.cp-picker-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.cp-color-area {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

/* Color Square */
.cp-color-square {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    max-height: 250px;
    border-radius: var(--radius-md);
    cursor: crosshair;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

@media (min-width: 768px) {
    .cp-color-square {
        max-height: 300px;
    }
}

.cp-color-cursor {
    position: absolute;
    width: 20px;
    height: 20px;
    border: 3px solid #fff;
    border-radius: 50%;
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.3), inset 0 0 0 1px rgba(0, 0, 0, 0.3);
    transform: translate(-50%, -50%);
    pointer-events: none;
}

/* Sliders */
.cp-slider-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.cp-slider-label {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.cp-slider-container {
    position: relative;
    height: 24px;
    border-radius: var(--radius-md);
    overflow: visible;
}

.cp-hue-slider,
.cp-alpha-slider {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: var(--radius-md);
    cursor: pointer;
    user-select: none;
    border: 1px solid var(--color-border);
}

.cp-hue-slider {
    background: linear-gradient(
        to right,
        hsl(0, 100%, 50%),
        hsl(60, 100%, 50%),
        hsl(120, 100%, 50%),
        hsl(180, 100%, 50%),
        hsl(240, 100%, 50%),
        hsl(300, 100%, 50%),
        hsl(360, 100%, 50%)
    );
}

.cp-alpha-slider {
    --alpha-color: #ff0000;
    background:
        linear-gradient(to right, transparent, var(--alpha-color)),
        repeating-conic-gradient(#e0e0e0 0% 25%, #fff 0% 50%) 50% / 12px 12px;
}

.cp-slider-thumb {
    position: absolute;
    top: 50%;
    width: 12px;
    height: 32px;
    background: #fff;
    border: 2px solid #333;
    border-radius: 4px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25), 0 0 0 1px rgba(0,0,0,0.1);
    transform: translate(-50%, -50%);
    pointer-events: none;
    transition: box-shadow var(--transition-fast);
}

.cp-hue-slider:focus .cp-slider-thumb,
.cp-alpha-slider:focus .cp-slider-thumb {
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25), 0 0 0 3px var(--color-primary);
}

/* ========================================
   Image Extraction Section
   ======================================== */

.cp-image-section {
    border-top: 1px solid var(--color-border);
    padding-top: var(--space-4);
}

.cp-image-section-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-3);
}

.cp-image-dropzone {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 120px;
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-alt);
    cursor: pointer;
    transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.cp-image-dropzone:hover,
.cp-image-dropzone:focus,
.cp-dropzone--active {
    border-color: var(--color-primary);
    background: var(--color-bg);
}

.cp-dropzone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-text-muted);
    text-align: center;
    padding: var(--space-4);
}

.cp-dropzone-content svg {
    opacity: 0.6;
}

.cp-image-preview {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.cp-image-preview canvas {
    display: block;
    width: 100%;
    height: auto;
    cursor: crosshair;
}

.cp-eyedropper-magnifier {
    position: fixed;
    width: 88px;
    height: 88px;
    border: 3px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-card);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    pointer-events: none;
    z-index: 1000;
}

.cp-eyedropper-magnifier canvas {
    image-rendering: pixelated;
    width: 100%;
    height: 100%;
}

.cp-auto-palette {
    margin-top: var(--space-3);
}

.cp-auto-palette h4 {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--color-text-muted);
    margin-bottom: var(--space-2);
}

.cp-palette-colors {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.cp-dominant-color {
    width: 36px;
    height: 36px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.cp-dominant-color:hover,
.cp-dominant-color:focus {
    transform: scale(1.1);
    border-color: var(--color-primary);
}

/* ========================================
   Color Values Section (Right)
   ======================================== */

.cp-values-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

/* Color Preview */
.cp-preview-box {
    display: flex;
    justify-content: center;
}

.cp-preview {
    display: flex;
    width: 100%;
    max-width: 200px;
    height: 80px;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.cp-preview-new,
.cp-preview-old {
    flex: 1;
    background-image: repeating-conic-gradient(#ccc 0% 25%, #fff 0% 50%) 50% / 10px 10px;
}

.cp-preview-new {
    position: relative;
}

.cp-preview-old {
    opacity: 0.6;
}

/* Color Formats */
.cp-formats {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.cp-format-row {
    display: grid;
    grid-template-columns: 60px 1fr 36px;
    align-items: center;
    gap: var(--space-2);
}

.cp-format-row label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-muted);
    text-transform: uppercase;
}

.cp-format-input {
    width: 100%;
    padding: var(--space-2) var(--space-3);
    font-family: var(--font-family-mono);
    font-size: var(--font-size-sm);
    color: var(--color-text);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: border-color var(--transition-fast);
}

.cp-format-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: var(--focus-ring);
}

.cp-copy-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.cp-copy-btn:hover,
.cp-copy-btn:focus {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.cp-copy-btn.cp-copied {
    background: var(--color-success);
    border-color: var(--color-success);
    color: white;
}

/* ========================================
   Tabs
   ======================================== */

.cp-tabs {
    border-top: 1px solid var(--color-border);
}

.cp-tab-list {
    display: flex;
    overflow-x: auto;
    border-bottom: 1px solid var(--color-border);
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.cp-tab-list::-webkit-scrollbar {
    display: none;
}

.cp-tab {
    flex: 0 0 auto;
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-muted);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition-fast);
}

.cp-tab:hover {
    color: var(--color-text);
    background: var(--color-bg-alt);
}

.cp-tab--active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.cp-panel {
    padding: var(--space-4);
}

.cp-panel-content {
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   Harmonies Panel
   ======================================== */

.cp-harmony-controls {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.cp-harmony-controls label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-muted);
}

.cp-select {
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-sm);
    color: var(--color-text);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.cp-harmony-colors {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
}

.cp-harmony-color {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3);
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-width: 80px;
}

.cp-harmony-color:hover,
.cp-harmony-color:focus {
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.cp-harmony-color::before {
    content: '';
    display: block;
    width: 50px;
    height: 50px;
    background: inherit;
    border-radius: var(--radius-sm);
}

.cp-harmony-hex {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text);
    background: var(--color-bg-card);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
}

/* ========================================
   Custom Palette Panel
   ======================================== */

.cp-palette-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.cp-export-group {
    display: flex;
    gap: var(--space-2);
    margin-left: auto;
}

.cp-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.cp-btn:hover,
.cp-btn:focus {
    background: var(--color-bg-alt);
    border-color: var(--color-border-dark);
}

.cp-btn--primary {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.cp-btn--primary:hover,
.cp-btn--primary:focus {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
}

.cp-btn--small {
    padding: var(--space-1) var(--space-2);
    font-size: var(--font-size-xs);
}

.cp-custom-palette {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
}

.cp-palette-empty {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.cp-palette-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
    position: relative;
}

.cp-palette-color {
    width: 60px;
    height: 60px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.cp-palette-color:hover,
.cp-palette-color:focus {
    transform: scale(1.05);
    border-color: var(--color-primary);
}

.cp-palette-hex {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.cp-palette-remove {
    position: absolute;
    top: -6px;
    right: -6px;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-error);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.cp-palette-item:hover .cp-palette-remove,
.cp-palette-item:focus-within .cp-palette-remove {
    opacity: 1;
}

/* ========================================
   Contrast Checker Panel
   ======================================== */

.cp-contrast-inputs {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.cp-contrast-color {
    flex: 1;
    min-width: 150px;
}

.cp-contrast-color label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-muted);
    margin-bottom: var(--space-2);
}

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

.cp-color-input-group .cp-format-input {
    flex: 1;
}

.cp-color-swatch {
    width: 36px;
    height: 36px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
}

.cp-swap-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.cp-swap-btn:hover,
.cp-swap-btn:focus {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.cp-contrast-preview {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
}

.cp-preview-text--normal {
    font-size: var(--font-size-base);
}

.cp-preview-text--large {
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.cp-contrast-results {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    align-items: flex-start;
}

.cp-contrast-ratio {
    text-align: center;
}

.cp-ratio-label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-1);
}

.cp-ratio-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text);
}

.cp-wcag-results {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2);
}

.cp-wcag-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-2) var(--space-3);
    background: var(--color-bg);
    border-radius: var(--radius-sm);
}

.cp-wcag-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.cp-wcag-status {
    font-size: var(--font-size-sm);
    font-weight: 600;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
}

.cp-wcag-pass {
    background: rgba(16, 185, 129, 0.1);
    color: #059669;
}

.cp-wcag-fail {
    background: rgba(239, 68, 68, 0.1);
    color: #dc2626;
}

/* ========================================
   Gradient Generator Panel
   ======================================== */

.cp-gradient-controls {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.cp-gradient-type,
.cp-gradient-angle {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.cp-gradient-type label,
.cp-gradient-angle label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-muted);
}

.cp-gradient-angle input[type="range"] {
    width: 100px;
}

#cp-angle-value {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    min-width: 45px;
}

.cp-gradient-preview-box {
    position: relative;
    margin-bottom: var(--space-4);
}

.cp-gradient-preview {
    height: 80px;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-2);
}

.cp-gradient-stops {
    position: relative;
    height: 30px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-sm);
}

.cp-gradient-stop {
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.cp-gradient-stop--active .cp-stop-color {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px var(--color-primary);
}

.cp-stop-color {
    width: 24px;
    height: 24px;
    border: 2px solid var(--color-border);
    border-radius: 50%;
    cursor: grab;
    transition: border-color var(--transition-fast);
}

.cp-stop-color:active {
    cursor: grabbing;
}

.cp-stop-remove {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    background: var(--color-error);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.cp-gradient-stop:hover .cp-stop-remove,
.cp-gradient-stop:focus-within .cp-stop-remove {
    opacity: 1;
}

.cp-gradient-actions {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.cp-gradient-css label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-muted);
    margin-bottom: var(--space-2);
}

.cp-css-output {
    width: 100%;
    height: 60px;
    padding: var(--space-2) var(--space-3);
    font-family: var(--font-family-mono);
    font-size: var(--font-size-sm);
    color: var(--color-text);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    resize: none;
}

/* ========================================
   Responsive Adjustments
   ======================================== */

@media (max-width: 767px) {
    .cp-main {
        padding: var(--space-3);
    }

    .cp-format-row {
        grid-template-columns: 50px 1fr 32px;
    }

    .cp-harmony-colors {
        justify-content: center;
    }

    .cp-palette-actions {
        flex-direction: column;
    }

    .cp-export-group {
        margin-left: 0;
        width: 100%;
        justify-content: stretch;
    }

    .cp-export-group .cp-btn {
        flex: 1;
    }

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

    .cp-swap-btn {
        align-self: center;
        transform: rotate(90deg);
    }

    .cp-wcag-results {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Dark Theme Adjustments
   ======================================== */

[data-theme="dark"] .cp-preview-new,
[data-theme="dark"] .cp-preview-old {
    background-image: repeating-conic-gradient(#333 0% 25%, #444 0% 50%) 50% / 10px 10px;
}

[data-theme="dark"] .cp-alpha-slider {
    background:
        linear-gradient(to right, transparent, var(--alpha-color)),
        repeating-conic-gradient(#444 0% 25%, #555 0% 50%) 50% / 12px 12px;
}

[data-theme="dark"] .cp-slider-thumb {
    background: #333;
    border-color: #fff;
}

[data-theme="dark"] .cp-wcag-pass {
    background: rgba(16, 185, 129, 0.2);
    color: #34d399;
}

[data-theme="dark"] .cp-wcag-fail {
    background: rgba(239, 68, 68, 0.2);
    color: #f87171;
}

/* ========================================
   RTL Support
   ======================================== */

[dir="rtl"] .cp-format-row {
    grid-template-columns: 36px 1fr 60px;
}

[dir="rtl"] .cp-export-group {
    margin-left: 0;
    margin-right: auto;
}

[dir="rtl"] .cp-palette-remove {
    right: auto;
    left: -6px;
}

/* ========================================
   Accessibility
   ======================================== */

.cp-color-square:focus,
.cp-hue-slider:focus,
.cp-alpha-slider:focus {
    outline: none;
    box-shadow: var(--focus-ring);
}

@media (prefers-reduced-motion: reduce) {
    .cp-color-cursor,
    .cp-slider-thumb,
    .cp-btn,
    .cp-tab,
    .cp-copy-btn,
    .cp-palette-color,
    .cp-harmony-color {
        transition: none;
    }
}

/* ========================================
   Help Panel
   ======================================== */

.help-panel {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.help-panel[hidden] {
    display: none;
}

.help-content {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
}

.help-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    background: var(--color-bg-card);
}

.help-header h2 {
    font-size: var(--font-size-lg);
    margin: 0;
}

.help-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
}

.help-close:hover {
    background: var(--color-bg-alt);
    color: var(--color-text);
}

.help-close:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

.help-body {
    padding: var(--space-6);
}

.help-section {
    margin-bottom: var(--space-6);
}

.help-section:last-child {
    margin-bottom: 0;
}

.help-section h3 {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-4);
    color: var(--color-text);
}

.help-steps {
    margin: 0;
    padding-left: var(--space-5);
}

.help-steps li {
    margin-bottom: var(--space-2);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.help-features {
    margin: 0;
    padding-left: var(--space-5);
}

.help-features li {
    margin-bottom: var(--space-2);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}