/**
 * Instant Grayscale Pro - Styles
 * Light Grey Theme with Neon Blue Accents
 */

/* CSS Variables */
:root {
    --igp-bg-primary: #F5F5F5;
    --igp-bg-card: #FFFFFF;
    --igp-header-bg: #1A1A2E;
    --igp-header-text: #FFFFFF;
    --igp-text-primary: #222222;
    --igp-text-secondary: #555555;
    --igp-text-muted: #777777;
    --igp-neon-blue: #00E5FF;
    --igp-neon-blue-hover: #00BCD4;
    --igp-neon-blue-glow: 0 0 15px rgba(0, 229, 255, 0.4);
    --igp-border-color: #E0E0E0;
    --igp-border-radius: 12px;
    --igp-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --igp-shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
    --igp-transition: all 0.3s ease;
}

/* Main Wrapper */
.igp-converter-wrapper {
    max-width: 1100px;
    margin: 30px auto;
    background: var(--igp-bg-primary);
    border-radius: var(--igp-border-radius);
    overflow: hidden;
    box-shadow: var(--igp-shadow);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
}

/* Header Bar */
.igp-header {
    background: var(--igp-header-bg);
    padding: 20px 30px;
    text-align: center;
}

.igp-title {
    color: var(--igp-header-text);
    margin: 0;
    font-size: 24px;
    font-weight: 600;
    letter-spacing: 1px;
}

/* Upload Area */
.igp-upload-area {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    padding: 40px;
    margin: 20px;
    background: var(--igp-bg-card);
    border: 2px dashed var(--igp-border-color);
    border-radius: var(--igp-border-radius);
    cursor: pointer;
    transition: var(--igp-transition);
    text-align: center;
}

.igp-upload-area:hover {
    border-color: var(--igp-neon-blue);
    box-shadow: var(--igp-shadow-hover);
}

.igp-upload-area.igp-drag-over {
    border-color: var(--igp-neon-blue);
    background: rgba(0, 229, 255, 0.02);
    box-shadow: var(--igp-neon-blue-glow);
}

.igp-upload-icon {
    width: 64px;
    height: 64px;
    color: var(--igp-neon-blue);
    margin-bottom: 15px;
    transition: var(--igp-transition);
}

.igp-upload-area:hover .igp-upload-icon {
    transform: translateY(-5px);
}

.igp-upload-text {
    font-size: 18px;
    color: var(--igp-text-primary);
    margin: 10px 0;
    font-weight: 500;
}

.igp-upload-separator {
    font-size: 14px;
    color: var(--igp-text-muted);
    margin: 15px 0;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* Buttons */
.igp-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--igp-transition);
    text-decoration: none;
}

.igp-btn-browse,
.igp-btn-download {
    background: var(--igp-neon-blue);
    color: #1A1A2E;
    box-shadow: var(--igp-neon-blue-glow);
}

.igp-btn-browse:hover,
.igp-btn-download:hover {
    background: var(--igp-neon-blue-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 229, 255, 0.6);
}

.igp-btn-new {
    background: var(--igp-bg-card);
    color: var(--igp-text-primary);
    border: 2px solid var(--igp-border-color);
}

.igp-btn-new:hover {
    border-color: var(--igp-neon-blue);
    color: var(--igp-neon-blue);
}

.igp-btn-icon {
    width: 20px;
    height: 20px;
}

/* Preview Container */
.igp-preview-container {
    padding: 25px;
}

/* Controls */
.igp-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 25px;
    padding: 20px;
    background: var(--igp-bg-card);
    border-radius: var(--igp-border-radius);
    box-shadow: var(--igp-shadow);
}

.igp-intensity-control {
    flex: 1;
    min-width: 250px;
}

.igp-intensity-label {
    display: block;
    font-size: 15px;
    font-weight: 600;
    color: var(--igp-text-primary);
    margin-bottom: 10px;
}

.igp-intensity-label span {
    color: var(--igp-neon-blue);
    font-size: 18px;
}

/* Slider */
.igp-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    border-radius: 5px;
    background: linear-gradient(to right, #E0E0E0 0%, var(--igp-neon-blue) 100%);
    outline: none;
    cursor: pointer;
}

.igp-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--igp-neon-blue);
    cursor: pointer;
    box-shadow: var(--igp-neon-blue-glow);
    transition: var(--igp-transition);
}

.igp-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    box-shadow: 0 0 20px rgba(0, 229, 255, 0.7);
}

.igp-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--igp-neon-blue);
    cursor: pointer;
    border: none;
    box-shadow: var(--igp-neon-blue-glow);
}

/* Images Grid */
.igp-images-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
    margin-bottom: 25px;
}

.igp-image-card {
    background: var(--igp-bg-card);
    border-radius: var(--igp-border-radius);
    overflow: hidden;
    box-shadow: var(--igp-shadow);
    transition: var(--igp-transition);
}

.igp-image-card:hover {
    box-shadow: var(--igp-shadow-hover);
}

.igp-image-label {
    text-align: center;
    padding: 15px;
    margin: 0;
    font-size: 16px;
    font-weight: 600;
    color: var(--igp-text-primary);
    background: var(--igp-bg-primary);
    border-bottom: 1px solid var(--igp-border-color);
}

.igp-image-wrapper {
    padding: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    background: #FAFAFA;
}

.igp-image-wrapper img,
.igp-image-wrapper canvas {
    max-width: 100%;
    max-height: 450px;
    height: auto;
    border-radius: 6px;
    object-fit: contain;
}

/* New Image Button */
.igp-btn-new {
    display: block;
    margin: 0 auto;
}

/* Loading Spinner */
.igp-loading {
    text-align: center;
    padding: 60px 20px;
}

.igp-spinner {
    width: 50px;
    height: 50px;
    margin: 0 auto 20px;
    border: 4px solid var(--igp-border-color);
    border-top: 4px solid var(--igp-neon-blue);
    border-radius: 50%;
    animation: igp-spin 1s linear infinite;
}

@keyframes igp-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.igp-loading p {
    color: var(--igp-text-secondary);
    font-size: 16px;
}

/* Error Message */
.igp-error {
    margin: 15px 25px;
    padding: 15px 20px;
    background: #FFF3F3;
    border-left: 4px solid #FF5252;
    border-radius: 6px;
    color: #D32F2F;
    font-size: 14px;
    font-weight: 500;
    animation: igp-slideIn 0.3s ease;
}

@keyframes igp-slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Admin Shortcode Info */
.igp-admin-shortcode-info {
    line-height: 1.8;
}

.igp-admin-shortcode-info p {
    margin: 8px 0;
    font-family: monospace;
    font-size: 14px;
}

/* ==================== */
/* RESPONSIVE DESIGN    */
/* ==================== */

/* Tablets (768px and below) */
@media (max-width: 768px) {
    .igp-images-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .igp-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .igp-btn-download {
        width: 100%;
        justify-content: center;
    }
    
    .igp-upload-area {
        min-height: 250px;
        padding: 30px 20px;
        margin: 15px;
    }
    
    .igp-title {
        font-size: 20px;
    }
    
    .igp-upload-text {
        font-size: 16px;
    }
    
    .igp-image-wrapper {
        min-height: 250px;
    }
}

/* Mobile (480px and below) */
@media (max-width: 480px) {
    .igp-converter-wrapper {
        margin: 15px 10px;
    }
    
    .igp-header {
        padding: 15px 20px;
    }
    
    .igp-title {
        font-size: 18px;
    }
    
    .igp-upload-area {
        min-height: 200px;
        padding: 20px 15px;
        margin: 10px;
    }
    
    .igp-upload-icon {
        width: 48px;
        height: 48px;
    }
    
    .igp-upload-text {
        font-size: 14px;
    }
    
    .igp-preview-container {
        padding: 15px;
    }
    
    .igp-controls {
        padding: 15px;
        gap: 15px;
    }
    
    .igp-btn {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    .igp-image-wrapper {
        min-height: 200px;
        padding: 10px;
    }
    
    .igp-image-label {
        font-size: 14px;
        padding: 10px;
    }
    
    .igp-intensity-label {
        font-size: 14px;
    }
    
    .igp-intensity-label span {
        font-size: 16px;
    }
}

/* Large Screens (1200px and above) */
@media (min-width: 1200px) {
    .igp-converter-wrapper {
        max-width: 1200px;
    }
    
    .igp-images-grid {
        gap: 30px;
    }
    
    .igp-image-wrapper {
        min-height: 400px;
    }
}

/* High-DPI Screens */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .igp-slider::-webkit-slider-thumb {
        box-shadow: 0 0 12px rgba(0, 229, 255, 0.5);
    }
}