/* Global Styles */
:root {
    --primary-color: #4a6bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --border-color: #dee2e6;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --text-color: #333;
    --text-light: #6c757d;
    --bg-color: #ffffff;
    --bg-secondary: #f8f9fa;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-secondary);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0px;
}

/* Header Styles */
header {
    text-align: center;
    margin-bottom: 0px;
    padding: 20px 0;
}

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

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

/* Upload Section */
.upload-section {
    margin-bottom: 30px;
}

.upload-container {
    background-color: var(--bg-color);
    border: 2px dashed var(--border-color);
    border-radius: 10px;
    padding: 40px 20px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.upload-container:hover {
    border-color: var(--primary-color);
    box-shadow: 0 5px 15px var(--shadow-color);
}

.upload-container.drag-over {
    border-color: var(--success-color);
    background-color: rgba(40, 167, 69, 0.05);
}

.upload-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.upload-container h3 {
    margin-bottom: 10px;
    font-size: 1.5rem;
}

.or-text {
    margin: 15px 0;
    color: var(--text-light);
    font-weight: bold;
}

.file-select-btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 12px 25px;
    border-radius: 5px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-size: 1rem;
}

.file-select-btn:hover {
    background-color: #3a5ae8;
    transform: translateY(-2px);
}

.file-requirements {
    margin-top: 15px;
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Conversion Section */
.conversion-section {
    margin-bottom: 30px;
}

.progress-container {
    background-color: var(--bg-color);
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 15px var(--shadow-color);
    text-align: center;
}

.progress-container h3 {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.progress-bar {
    width: 100%;
    height: 10px;
    background-color: var(--border-color);
    border-radius: 5px;
    margin-bottom: 15px;
    overflow: hidden;
}

.progress {
    height: 100%;
    width: 0%;
    background-color: var(--primary-color);
    border-radius: 5px;
    transition: width 0.3s ease;
}

.status-text {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Result Section */
.result-section {
    margin-bottom: 30px;
}

.result-container {
    background-color: var(--bg-color);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px var(--shadow-color);
}

.result-header {
    padding: 20px;
    text-align: center;
    background-color: rgba(40, 167, 69, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.result-header.success {
    color: var(--success-color);
}

.file-preview-container {
    display: flex;
    flex-wrap: wrap;
    padding: 20px;
}

.file-preview {
    flex: 1;
    min-width: 300px;
    padding: 15px;
}

.file-preview h4 {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
}

.preview-content {
    height: 300px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    padding: 15px;
    background-color: var(--bg-secondary);
    white-space: pre-wrap;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
}

.result-actions {
    display: flex;
    justify-content: center;
    gap: 15px;
    padding: 20px;
    flex-wrap: wrap;
}

.download-btn {
    background-color: var(--success-color);
    color: white;
    padding: 12px 25px;
    border-radius: 5px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.download-btn:hover {
    background-color: #218838;
    transform: translateY(-2px);
}

.reset-btn {
    background-color: var(--secondary-color);
    color: white;
    padding: 12px 25px;
    border-radius: 5px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.reset-btn:hover {
    background-color: #5a6268;
    transform: translateY(-2px);
}

/* Info Section */
.info-section {
    margin-bottom: 30px;
}

.info-section h2 {
    text-align: center;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.steps-container {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
}

.step {
    flex: 1;
    min-width: 250px;
    background-color: var(--bg-color);
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 5px 15px var(--shadow-color);
    display: flex;
    gap: 15px;
}

.step-number {
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.step-content h3 {
    margin-bottom: 10px;
    color: var(--primary-color);
}

/* Ad Banners */
.ad-banner {
    margin: 30px 0;
    text-align: center;
}

.ad-placeholder {
    background-color: var(--border-color);
    color: var(--text-light);
    padding: 20px;
    border-radius: 5px;
    font-size: 0.9rem;
}

.top-ad, .bottom-ad {
    background-color: var(--bg-color);
    padding: 15px;
    border-radius: 10px;
    box-shadow: 0 5px 15px var(--shadow-color);
}

.middle-ad {
    margin: 40px 0;
}

/* Footer */
footer {
    text-align: center;
    padding: 20px;
    background-color: var(--bg-color);
    margin-top: 50px;
    border-top: 1px solid var(--border-color);
}

footer p {
    margin-bottom: 10px;
    color: var(--text-light);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary-color);
}

/* Scroll Buttons */
.scroll-buttons {
    position: fixed;
    bottom: 30px;
    right: 30px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 100;
}

.scroll-buttons button {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.scroll-buttons button:hover {
    background-color: #3a5ae8;
    transform: translateY(-3px);
}

/* Responsive Styles */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .file-preview-container {
        flex-direction: column;
    }

    .step {
        min-width: 100%;
    }

    .result-actions {
        flex-direction: column;
    }

    .result-actions button {
        width: 100%;
    }

    .scroll-buttons {
        bottom: 20px;
        right: 20px;
    }

    .scroll-buttons button {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 15px;
    }

    header h1 {
        font-size: 1.8rem;
    }

    .upload-container {
        padding: 30px 15px;
    }

    .progress-container {
        padding: 20px;
    }

    .file-preview {
        min-width: 100%;
    }
}