/* ==========================================================================
   WP Image Scaler - Core Styles
   ========================================================================== */

:root {
    --wp-scaler-bg: #ffffff;
    --wp-scaler-primary: #6366f1; /* Vibrant Indigo/Purple */
    --wp-scaler-primary-hover: #4f46e5;
    --wp-scaler-secondary: #0ea5e9; /* Light Wave Teal/Blue */
    --wp-scaler-secondary-hover: #0284c7;
    --wp-scaler-success: #10b981; /* Fresh Emerald Green */
    --wp-scaler-success-hover: #059669;
    --wp-scaler-text-main: #1e293b; /* Slate Dark */
    --wp-scaler-text-muted: #64748b; /* Slate Light */
    --wp-scaler-border: #cbd5e1;
    --wp-scaler-accent-light: #f0fdfa;
    --wp-scaler-radius: 12px;
    --wp-scaler-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
}

/* Container & Layout */
.wp-scaler-container {
    position: relative;
    max-width: 680px;
    margin: 2rem auto;
    padding: 2.5rem;
    background: var(--wp-scaler-bg);
    border-radius: var(--wp-scaler-radius);
    box-shadow: var(--wp-scaler-shadow);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--wp-scaler-text-main);
    overflow: hidden;
    border: 1px solid rgba(226, 232, 240, 0.8);
}

/* Light Wave Decorative Background Accent */
.wp-scaler-wave-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background: linear-gradient(90deg, var(--wp-scaler-secondary), var(--wp-scaler-primary), var(--wp-scaler-secondary));
    background-size: 200% auto;
    animation: wpScalerWaveMove 4s linear infinite;
}

@keyframes wpScalerWaveMove {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Header Sections */
.wp-scaler-header {
    text-align: center;
    margin-bottom: 2rem;
}

.wp-scaler-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--wp-scaler-text-main);
    margin: 0 0 0.5rem 0;
    letter-spacing: -0.025em;
}

.wp-scaler-header p {
    font-size: 0.95rem;
    color: var(--wp-scaler-text-muted);
    margin: 0;
}

/* Drag & Drop Upload Zone */
.wp-scaler-upload-zone {
    position: relative;
    border: 2px dashed #cbd5e1;
    background-color: #f8fafc;
    border-radius: var(--wp-scaler-radius);
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.25s ease-in-out;
}

.wp-scaler-upload-zone:hover,
.wp-scaler-upload-zone.dragover {
    border-color: var(--wp-scaler-secondary);
    background-color: var(--wp-scaler-accent-light);
}

.wp-scaler-file-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
    z-index: 10;
}

/* Upload Placeholder Elements */
.wp-scaler-icon {
    display: inline-block;
    font-size: 2.5rem;
    color: var(--wp-scaler-secondary);
    margin-bottom: 1rem;
    line-height: 1;
}

.wp-scaler-upload-placeholder p {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--wp-scaler-text-main);
    margin: 0 0 1.25rem 0;
}

/* UI Interactive Buttons */
.wp-scaler-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    outline: none;
}

.wp-scaler-btn-select {
    background-color: #ffffff;
    color: var(--wp-scaler-text-main);
    border: 1px solid var(--wp-scaler-border);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.wp-scaler-btn-select:hover {
    background-color: #f1f5f9;
    border-color: #94a3b8;
}

.wp-scaler-btn-primary {
    background: linear-gradient(135deg, var(--wp-scaler-primary), #4f46e5);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.25);
    width: 100%;
}

.wp-scaler-btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.35);
}

.wp-scaler-btn-success {
    background: linear-gradient(135deg, var(--wp-scaler-success), #059669);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
    width: 100%;
}

.wp-scaler-btn-success:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(16, 185, 129, 0.35);
}

/* Image Preview Block */
.wp-scaler-preview-wrapper {
    position: relative;
    z-index: 15;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.wp-scaler-preview-wrapper img {
    max-height: 200px;
    max-width: 100%;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    background: #eaeaea;
}

.wp-scaler-file-info {
    font-size: 0.85rem;
    color: var(--wp-scaler-text-muted);
    background: #f1f5f9;
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-weight: 500;
}

/* Operational Control Options */
.wp-scaler-controls {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px dashed #e2e8f0;
}

.wp-scaler-input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.wp-scaler-input-group label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--wp-scaler-text-main);
}

.wp-scaler-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.wp-scaler-input-wrapper input[type="number"] {
    width: 100%;
    padding: 0.75rem 3rem 0.75rem 1rem;
    font-size: 1.1rem;
    font-weight: 600;
    border: 1px solid var(--wp-scaler-border);
    border-radius: 8px;
    outline: none;
    transition: all 0.2s ease;
    background-color: #f8fafc;
}

.wp-scaler-input-wrapper input[type="number"]:focus {
    border-color: var(--wp-scaler-primary);
    background-color: #ffffff;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.wp-scaler-unit {
    position: absolute;
    right: 1rem;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--wp-scaler-text-muted);
    text-transform: uppercase;
}

/* Actions Grid Container */
.wp-scaler-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

/* Operation Engine Processing State Status Messages */
.wp-scaler-status {
    margin-top: 1rem;
    text-align: center;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--wp-scaler-primary);
    min-height: 1.25rem;
}

/* Global Hidden Helper Utility Class */
.hidden {
    display: none !important;
}

/* ==========================================================================
   Responsive Adaptations (Mobile First)
   ========================================================================== */

@media (min-width: 480px) {
    .wp-scaler-actions {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
}

@media (max-width: 600px) {
    .wp-scaler-container {
        padding: 1.5rem 1rem;
        margin: 1rem;
    }
    .wp-scaler-header h2 {
        font-size: 1.4rem;
    }
    .wp-scaler-upload-zone {
        padding: 2rem 1rem;
    }
}