/* ============================================
   Color Picker & Converter - Specific Styles
   ============================================ */

/* Calculator Layout */
.calculator-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 24px;
    min-height: calc(100vh - 300px);
}

/* Header Title Area */
.header-title-area {
    margin-top: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.calculator-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
}

.panel-header {
    margin-bottom: 32px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-header h2 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.panel-header p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* Color Specific Styles */
.main-preview-area {
    display: flex;
    gap: 24px;
    margin-bottom: 32px;
    align-items: stretch;
}

.color-swatch-large {
    width: 120px;
    height: 120px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    /* Dark theme checkerboard (default) */
    background-image:
        linear-gradient(45deg, #3a3a3a 25%, transparent 25%),
        linear-gradient(-45deg, #3a3a3a 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #3a3a3a 75%),
        linear-gradient(-45deg, transparent 75%, #3a3a3a 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
    background-color: #1a1a1a;
    /* CSS variable for the actual color (set by JS) */
    --swatch-color: rgb(59, 130, 246);
}

/* Light theme checkerboard override */
[data-theme="light"] .color-swatch-large {
    background-image:
        linear-gradient(45deg, #ccc 25%, transparent 25%),
        linear-gradient(-45deg, #ccc 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #ccc 75%),
        linear-gradient(-45deg, transparent 75%, #ccc 75%);
    background-color: #fff;
}

/* The actual color overlay - sits on top of checkerboard */
.color-swatch-large::before {
    content: '';
    position: absolute;
    inset: 0;
    background-color: var(--swatch-color);
    border-radius: 11px; /* Slightly less than parent to avoid border overlap */
}

/* Keyboard focus indicator */
.color-swatch-large:focus-visible {
    outline: 3px solid var(--accent-it);
    outline-offset: 2px;
}

/* Hidden native input covering the swatch */
.color-swatch-large input[type="color"] {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    opacity: 0;
    cursor: pointer;
}

.hex-input-group {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.hex-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.hex-label-hint {
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: normal;
}

.hex-field-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.hex-hash {
    position: absolute;
    left: 20px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.5rem;
    color: var(--text-muted);
    pointer-events: none;
}

.hex-input {
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 16px 16px 16px 40px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.5rem;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all 0.2s;
}

.hex-input:focus {
    outline: none;
    border-color: var(--accent-it);
    box-shadow: 0 0 0 3px var(--accent-it-dim);
}

/* Error state for invalid hex input */
.hex-input.input-error {
    border-color: var(--accent-error);
    box-shadow: 0 0 0 3px var(--accent-error-dim);
    animation: shake 0.3s ease;
}

.hex-input.input-error::placeholder {
    color: var(--accent-error);
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-4px); }
    40%, 80% { transform: translateX(4px); }
}

/* Alpha Indicator in HEX Input */
.hex-alpha-indicator {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    background: var(--accent-it-dim);
    color: var(--accent-it);
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    font-family: 'JetBrains Mono', monospace;
    transition: opacity 0.2s, transform 0.2s;
}

.hex-alpha-indicator:not([hidden]) {
    display: flex;
}

.hex-hint-text {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 6px;
}

.hex-hint-text:empty {
    display: none;
}

.hex-error-text {
    color: var(--accent-error);
    font-weight: 500;
}

/* Sliders Section */
.sliders-container {
    display: grid;
    gap: 20px;
    margin-bottom: 32px;
    padding: 24px;
    background: var(--bg-secondary);
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.channel-row {
    display: grid;
    grid-template-columns: 40px 1fr 60px;
    gap: 16px;
    align-items: center;
}

.channel-label {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    color: var(--text-secondary);
}

input[type=range] {
    width: 100%;
    height: 6px;
    background: var(--bg-card);
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-it);
    cursor: pointer;
    border: 2px solid var(--bg-card);
    box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

/* Firefox range slider styling */
input[type=range]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-it);
    cursor: pointer;
    border: 2px solid var(--bg-card);
    box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

input[type=range]::-moz-range-track {
    width: 100%;
    height: 6px;
    background: var(--bg-card);
    border-radius: 3px;
}

.channel-val {
    font-family: 'JetBrains Mono', monospace;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 6px;
    border-radius: 4px;
    text-align: center;
    width: 100%;
}

/* Alpha Channel Styles */
.alpha-row {
    padding-top: 12px;
    margin-top: 8px;
    border-top: 1px dashed var(--border-color);
}

.alpha-row-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 12px;
    text-align: center;
}

.alpha-row-label svg {
    width: 12px;
    height: 12px;
    vertical-align: text-bottom;
    margin-right: 4px;
}

/* Alpha Slider Wrapper for scale positioning */
.alpha-slider-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.alpha-slider {
    /* Dark theme checkerboard (default) */
    background-image:
        linear-gradient(45deg, #3a3a3a 25%, transparent 25%),
        linear-gradient(-45deg, #3a3a3a 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #3a3a3a 75%),
        linear-gradient(-45deg, transparent 75%, #3a3a3a 75%);
    background-size: 10px 10px;
    background-position: 0 0, 0 5px, 5px -5px, -5px 0px;
    background-color: var(--bg-card);
}

/* Light theme checkerboard override */
[data-theme="light"] .alpha-slider {
    background-image:
        linear-gradient(45deg, #ccc 25%, transparent 25%),
        linear-gradient(-45deg, #ccc 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #ccc 75%),
        linear-gradient(-45deg, transparent 75%, #ccc 75%);
}

/* Alpha Slider Scale Markers */
.alpha-slider-scale {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    padding: 0 2px;
}

.scale-mark {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    color: var(--text-muted);
    position: relative;
    user-select: none;
    transform: translateX(-50%);
}

.scale-mark::before {
    content: '';
    position: absolute;
    top: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 1px;
    height: 4px;
    background: var(--border-color);
}

.scale-mark:first-child {
    transform: none;
}

.scale-mark:first-child::before {
    transform: none;
}

.scale-mark:last-child {
    transform: none;
}

.scale-mark:last-child::before {
    transform: none;
}

/* Highlight the marker closest to current value */
.scale-mark.active {
    color: var(--accent-it);
    font-weight: 600;
}

.scale-mark.active::before {
    background: var(--accent-it);
    height: 6px;
    top: -5px;
}

/* Converter Grid */
.converter-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.format-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
}

.format-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    font-weight: 600;
}

.format-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9375rem;
    color: var(--text-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.copy-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: color 0.2s;
}

.copy-btn:hover {
    color: var(--accent-it);
    background: var(--bg-secondary);
}

.copy-btn:focus-visible {
    outline: 2px solid var(--accent-it);
    outline-offset: 2px;
    border-radius: 4px;
}

/* Sidebar Styles */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.sidebar-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
}

.sidebar-card h3 {
    font-size: 0.875rem;
    color: var(--text-primary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.sidebar-card-subtitle {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

/* Tints & Shades */
.palette-strip {
    display: flex;
    height: 40px;
    border-radius: 6px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    margin-bottom: 16px;
}

/* Loading placeholder for empty palette strips */
.palette-strip:empty {
    background: repeating-linear-gradient(
        90deg,
        var(--bg-secondary),
        var(--bg-secondary) 8px,
        var(--bg-card) 8px,
        var(--bg-card) 16px
    );
    position: relative;
}

.palette-strip:empty::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.03) 50%,
        transparent 100%
    );
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.palette-block {
    flex: 1;
    cursor: pointer;
    transition: transform 0.1s;
}

.palette-block:hover {
    transform: scaleY(1.1);
}

.palette-block:focus-visible {
    outline: 2px solid var(--accent-it);
    outline-offset: 2px;
    transform: scaleY(1.1);
    z-index: 1;
}

/* Contrast Check */
.contrast-demo {
    padding: 16px;
    border-radius: 6px;
    margin-bottom: 12px;
    text-align: center;
    font-weight: 600;
    border: 1px solid var(--border-color);
}

.contrast-badge {
    display: inline-block;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 700;
    margin-left: 8px;
}

.contrast-badge.aaa {
    background: var(--accent-success-dim);
    color: var(--accent-success);
    font-weight: 700;
}

.contrast-badge.pass {
    background: var(--accent-success-dim);
    color: var(--accent-success);
}

.contrast-badge.fail {
    background: var(--accent-error-dim);
    color: var(--accent-error);
}

/* Contrast Background Controls */
.contrast-background-controls {
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px dashed var(--border-color);
}

.contrast-background-controls label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.bg-presets {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.bg-preset {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.bg-preset:hover {
    border-color: var(--accent-it);
    color: var(--text-primary);
}

.bg-preset.active {
    border-color: var(--accent-it);
    background: var(--accent-it-dim);
    color: var(--accent-it);
    font-weight: 600;
}

.bg-swatch {
    width: 14px;
    height: 14px;
    border-radius: 3px;
    border: 1px solid rgba(0,0,0,0.2);
    flex-shrink: 0;
}

.bg-swatch.bg-white {
    background: #ffffff;
}

.bg-swatch.bg-dark {
    background: #121212;
}

.bg-swatch.bg-custom {
    background: linear-gradient(135deg, #ff0000 25%, #00ff00 25%, #00ff00 50%, #0000ff 50%, #0000ff 75%, #ffff00 75%);
}

/* Custom background color picker (hidden by default) */
.custom-bg-picker-wrapper {
    margin-top: 8px;
    display: none;
}

.custom-bg-picker-wrapper.active {
    display: flex;
    align-items: center;
    gap: 8px;
}

.custom-bg-picker-wrapper input[type="color"] {
    width: 40px;
    height: 32px;
    padding: 2px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
}

.custom-bg-picker-wrapper .bg-hex-display {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Disclaimer Card */
.disclaimer-card {
    background: var(--bg-card);
    border: 1px solid var(--accent-error-dim);
    border-left: 4px solid var(--accent-error);
    border-radius: 8px;
    padding: 20px;
    margin-top: 24px;
}

/* Use color-mix() for better blending when supported */
@supports (color-mix: in srgb, var(--accent-error) 40%, transparent) {
    .disclaimer-card {
        border-color: color-mix(in srgb, var(--accent-error) 40%, transparent);
        border-left-color: color-mix(in srgb, var(--accent-error) 70%, transparent);
    }
}

.disclaimer-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    color: var(--accent-error);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 12px;
}

.disclaimer-content {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.disclaimer-content p:first-child {
    margin-bottom: 8px;
}

.disclaimer-list {
    margin: 12px 0;
    padding-left: 20px;
}

.disclaimer-list li {
    margin-bottom: 6px;
}

.disclaimer-footer {
    margin-top: 16px;
    font-size: 0.75rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    padding-top: 12px;
    font-family: 'JetBrains Mono', monospace;
}

/* Visually Hidden (for screen readers) */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .calculator-layout {
        grid-template-columns: 1fr;
    }

    .converter-grid {
        grid-template-columns: 1fr;
    }

    .main-preview-area {
        flex-direction: column;
    }

    .color-swatch-large {
        width: 100%;
        height: 80px;
    }

    .scale-mark {
        font-size: 0.6rem;
    }

    .alpha-slider-scale {
        padding: 0 4px;
    }
}