/* Base64 Encoder/Decoder - Light Theme */


/* Dark mode overrides */
[data-theme="dark"] {
    --tool-bg: #0f172a;
    --tool-border: #334155;
    --tool-border-hover: #475569;
    --tool-text: #f8fafc;
    --tool-text-secondary: #94a3b8;
    --tool-input-bg: #1e293b;
    --tool-input-border: #334155;
    --tool-button-bg: #1e293b;
    --tool-button-hover: #334155;
    --tool-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.3);
    --tool-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --surface-color: #1e293b;
    --surface-hover: #334155;
    --background-color: #0f172a;
    --text-color: #f8fafc;
    --status-info: rgba(96, 165, 250, 0.2);
    --status-success: rgba(34, 197, 94, 0.2);
    --status-error: rgba(248, 113, 113, 0.2);
    --bg-color: #0f172a;
}

/* Dark mode element overrides */
[data-theme="dark"] .tool-card {
    background: var(--bg-card, #1e293b);
    border-color: var(--border-color, #334155);
}

[data-theme="dark"] .tool-hero {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}

[data-theme="dark"] input,
[data-theme="dark"] select,
[data-theme="dark"] textarea {
    background: var(--input-bg, #1e293b);
    color: var(--text-primary, #f8fafc);
    border-color: var(--border-color, #334155);
}

[data-theme="dark"] input::placeholder,
[data-theme="dark"] textarea::placeholder {
    color: var(--text-muted, #64748b);
}

[data-theme="dark"] .tab-btn.active {
    color: white;
}

[data-theme="dark"] label {
    color: var(--text-primary, #f8fafc);
}

[data-theme="dark"] h1, [data-theme="dark"] h2, [data-theme="dark"] h3,
[data-theme="dark"] h4, [data-theme="dark"] h5, [data-theme="dark"] h6 {
    color: var(--text-primary, #f8fafc);
}

[data-theme="dark"] p {
    color: var(--text-secondary, #cbd5e1);
}
.tool-card {
    background: var(--bg-primary);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    margin-bottom: 2rem;
}

.tool-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 8px 8px 0 0;
    transition: all 0.2s ease;
    font-weight: 500;
}

.tab-btn.active {
    background: #3b82f6;
    color: var(--bg-primary);
}

.tab-btn:hover:not(.active) {
    background: var(--bg-secondary);
    color: var(--text-secondary);
}

.tab-content {
    display: none;
}

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

.form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-group textarea {
    width: 100%;
    min-height: 120px;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    background: var(--bg-primary);
    color: var(--text-secondary);
    resize: vertical;
    transition: border-color 0.2s ease;
}

.form-group textarea:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group textarea[readonly] {
    background: var(--bg-secondary);
    cursor: default;
}

.button-group {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: #3b82f6;
    color: var(--bg-primary);
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-color);
    transform: translateY(-1px);
}

.btn-secondary {
    background: #10b981;
    color: var(--bg-primary);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--success-color);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    color: var(--text-muted);
    border: 2px solid var(--border-color);
}

.btn-outline:hover:not(:disabled) {
    background: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-secondary);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.copy-btn {
    position: absolute;
    top: 2.5rem;
    right: 0.5rem;
    padding: 0.5rem;
    min-width: auto;
}

.file-upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 3rem 2rem;
    text-align: center;
    background: var(--bg-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.file-upload-area:hover {
    border-color: #3b82f6;
    background: var(--color-blue-soft);
}

.file-upload-area.dragover {
    border-color: #3b82f6;
    background: var(--color-blue-soft);
    transform: scale(1.02);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.file-upload-area p {
    color: var(--text-muted);
    margin: 0;
    font-weight: 500;
}

.file-upload-area input[type="file"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.file-info {
    background: var(--color-blue-soft);
    border: 1px solid #bae6fd;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.file-info p {
    margin: 0.25rem 0;
    color: var(--primary-color);
}

.file-info strong {
    color: var(--primary-color);
}

.info-panel {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 2rem;
    border: 1px solid var(--border-color);
}

.info-panel h3 {
    color: var(--text-primary);
    margin: 0 0 1rem 0;
    font-size: 1.25rem;
}

.info-panel p {
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.info-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.feature-item {
    text-align: center;
}

.feature-item h4 {
    color: var(--text-primary);
    margin: 0.5rem 0;
    font-size: 1rem;
}

.feature-item p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: 0;
}

/* Hidden elements */
.hidden {
    display: none !important;
}

/* Success/Error states */
.success {
    border-color: #10b981 !important;
    background: var(--color-green-soft) !important;
}

.error {
    border-color: #ef4444 !important;
    background: var(--color-red-soft) !important;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .tool-card {
        padding: 1.5rem;
    }
    
    .button-group {
        flex-direction: column;
    }
    
    .btn {
        justify-content: center;
    }
    
    .info-features {
        grid-template-columns: 1fr;
    }
    
    .copy-btn {
        position: static;
        margin-top: 0.5rem;
    }
}