/* Base64 Image Converter Specific Stylesheet */

/* Tabs Control */
.tabs-container {
    display: flex;
    gap: 1rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 2rem;
    padding-bottom: 0.25rem;
}

.tab-btn {
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    font-family: 'Outfit', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    padding: 0.75rem 1.25rem;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover {
    color: var(--primary);
}

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

/* Panel Sections */
.tab-panel {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.tab-panel.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius-md);
    padding: 3rem 2rem;
    text-align: center;
    background: var(--bg-card);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    position: relative;
}

.upload-zone:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.02);
}

[data-theme="dark"] .upload-zone:hover {
    background: rgba(99, 102, 241, 0.08);
}

.upload-zone svg {
    color: var(--primary);
    width: 48px;
    height: 48px;
    opacity: 0.85;
}

.upload-zone h4 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    margin: 0;
}

.upload-zone p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
}

/* Dropzone Active Overlays */
.dropzone-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(99, 102, 241, 0.95);
    border: 2px dashed #ffffff;
    border-radius: var(--radius-md);
    color: #ffffff;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    z-index: 10;
    gap: 0.5rem;
}
.dropzone-overlay.active {
    opacity: 1;
}

/* Image Converter Grid Layout */
.converter-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 992px) {
    .converter-grid {
        grid-template-columns: 1fr 1.2fr;
    }
}

/* Image Preview Block */
.preview-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 250px;
    max-height: 450px;
    overflow: hidden;
    position: relative;
}

.preview-container img {
    max-width: 100%;
    max-height: 400px;
    object-fit: contain;
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    z-index: 2;
}

.preview-background-checkerboard {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(45deg, var(--border) 25%, transparent 25%), 
        linear-gradient(-45deg, var(--border) 25%, transparent 25%), 
        linear-gradient(45deg, transparent 75%, var(--border) 75%), 
        linear-gradient(-45deg, transparent 75%, var(--border) 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    opacity: 0.15;
    z-index: 1;
}

/* Details and Output panels */
.details-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.details-item {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.5rem;
}

.details-label {
    color: var(--text-secondary);
    font-weight: 500;
}

.details-value {
    color: var(--text-primary);
    font-weight: 600;
}

/* Control Panel */
.format-selectors {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.format-btn {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.format-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.format-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #ffffff !important;
}

/* Output String Textareas */
.output-textarea {
    width: 100%;
    height: 180px;
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.85rem;
    border-radius: var(--radius-md);
    background: var(--textarea-bg);
    color: var(--textarea-color);
    padding: 1rem;
    border: 1px solid var(--border);
    resize: none;
    outline: none;
    transition: var(--transition);
}

.output-textarea:focus {
    border-color: var(--primary);
    background-color: var(--textarea-focus);
}

/* Base64 Decode Textarea Inputs */
.decode-textarea {
    width: 100%;
    height: 250px;
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.85rem;
    border-radius: var(--radius-md);
    background: var(--textarea-bg);
    color: var(--textarea-color);
    padding: 1rem;
    border: 1px solid var(--border);
    resize: vertical;
    outline: none;
    transition: var(--transition);
    margin-bottom: 1rem;
}

.decode-textarea:focus {
    border-color: var(--primary);
    background-color: var(--textarea-focus);
}