* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #007bff;
    --primary-hover: #0056b3;
    --secondary-color: #6c757d;
    --secondary-hover: #545b62;
    --danger-color: #dc3545;
    --danger-hover: #c82333;
    --success-color: #28a745;
    --error-color: #dc3545;
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --border-color: #dee2e6;
    --text-color: #212529;
    --text-muted: #6c757d;
    --code-bg: #f8f9fa;
    --shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 6px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    padding: 30px;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

header h1 {
    font-size: 2.5rem;
    color: var(--text-color);
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.controls {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
    justify-content: center;
}

.d-none {
	display: none;
	
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: var(--secondary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: var(--danger-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn:active {
    transform: translateY(0);
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.section {
    background: var(--code-bg);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
}

.section-header h2 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-color);
}

.size-info {
    display: flex;
    align-items: center;
    gap: 8px;
}

.size-label {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.size-value {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 0.9rem;
}

.textarea-wrapper {
    flex: 1;
    position: relative;
    min-height: 400px;
}

.code-input {
    width: 100%;
    height: 100%;
    min-height: 400px;
    padding: 15px;
    border: none;
    background: var(--code-bg);
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.6;
    resize: vertical;
    color: var(--text-color);
    tab-size: 2;
}

.code-input:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: -2px;
}

.section-footer {
    padding: 10px 20px;
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 15px;
}

.btn-link {
    background: none;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    font-size: 0.9rem;
    padding: 5px 0;
    text-decoration: underline;
    transition: color 0.3s ease;
}

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

.error-message {
    background-color: #f8d7da;
    color: #721c24;
    padding: 15px 20px;
    border-radius: 6px;
    margin-bottom: 20px;
    border-left: 4px solid var(--error-color);
    font-weight: 500;
}

.success-message {
    background-color: #d4edda;
    color: #155724;
    padding: 15px 20px;
    border-radius: 6px;
    margin-bottom: 20px;
    border-left: 4px solid var(--success-color);
    font-weight: 500;
}

footer {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
}

footer a {
    color: var(--primary-color);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 968px) {
    .content-grid {
        grid-template-columns: 1fr;
    }

    header h1 {
        font-size: 2rem;
    }

    .controls {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}

@media (max-width: 600px) {
    .container {
        padding: 15px;
    }

    header h1 {
        font-size: 1.5rem;
    }

    .subtitle {
        font-size: 0.9rem;
    }

    .code-input {
        font-size: 12px;
        min-height: 300px;
    }
	#uploadJson { display: none;}
}

/* Scrollbar Styling */
.code-input::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.code-input::-webkit-scrollbar-track {
    background: var(--card-bg);
}

.code-input::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.code-input::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}