:root {
    --primary-color: #4a6ee0;
    --primary-dark: #3857c3;
    --secondary-color: #6c757d;
    --light-bg: #f8f9fa;
    --dark-text: #343a40;
    --light-text: #f8f9fa;
    --success-color: #28a745;
    --error-color: #dc3545;
    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-text);
    background-color: #f0f2f5;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px 0;
}

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

header p {
    color: var(--secondary-color);
}

.card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    padding: 25px;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

select, input[type="number"] {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 16px;
    transition: border-color 0.3s;
}

select:focus, input[type="number"]:focus {
    border-color: var(--primary-color);
    outline: none;
}

.checkbox-group {
    display: flex;
    align-items: center;
}

.checkbox-group input {
    margin-right: 10px;
}

.checkbox-group label {
    margin: 0;
}

.help-text {
    display: block;
    font-size: 14px;
    color: var(--secondary-color);
    margin-top: 5px;
}

.primary-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s;
    text-decoration: none;
}

.primary-button:hover {
    background-color: var(--primary-dark);
}

.primary-button:disabled {
    background-color: var(--secondary-color);
    cursor: not-allowed;
}

.primary-button i {
    margin-right: 8px;
}

#drop-area {
    border: 2px dashed #ccc;
    border-radius: var(--border-radius);
    padding: 30px;
    text-align: center;
    transition: border-color 0.3s;
}

#drop-area.highlight {
    border-color: var(--primary-color);
    background-color: rgba(74, 110, 224, 0.05);
}

#fileElem {
    display: none;
}

.button {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 10px 20px;
    border-radius: var(--border-radius);
    cursor: pointer;
    margin-top: 15px;
    transition: background-color 0.3s;
}

.button:hover {
    background: var(--primary-dark);
}

#file-preview {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 15px;
    padding: 10px 15px;
    background-color: #f8f9fa;
    border-radius: var(--border-radius);
}

.file-info {
    display: flex;
    align-items: center;
}

.file-info i {
    font-size: 24px;
    color: var(--primary-color);
    margin-right: 10px;
}

.icon-button {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--secondary-color);
    transition: color 0.3s;
}

.icon-button:hover {
    color: var(--error-color);
}

.submit-card {
    text-align: center;
}

.progress-container {
    width: 100%;
    height: 20px;
    background-color: #e9ecef;
    border-radius: 10px;
    margin: 15px 0;
    overflow: hidden;
}

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

#progress-text {
    text-align: center;
}

.success-message, .error-message {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.success-message i, .error-message i {
    font-size: 24px;
    margin-right: 10px;
}

.success-message i {
    color: var(--success-color);
}

.error-message i {
    color: var(--error-color);
}

.file-details {
    background-color: var(--light-bg);
    padding: 15px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
}

.file-details p {
    margin-bottom: 8px;
}

#error-details {
    background-color: rgba(220, 53, 69, 0.1);
    padding: 15px;
    border-radius: var(--border-radius);
    color: var(--error-color);
}

footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px 0;
    color: var(--secondary-color);
    font-size: 14px;
}

.hidden {
    display: none !important;
}

/* Add new styles for upload tabs */
.upload-tabs {
    display: flex;
    margin-bottom: 20px;
    border-bottom: 1px solid #ddd;
}

.tab-button {
    background: none;
    border: none;
    padding: 10px 15px;
    font-size: 16px;
    cursor: pointer;
    color: var(--secondary-color);
    position: relative;
    transition: color 0.3s;
}

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

.tab-button.active {
    color: var(--primary-color);
    font-weight: 500;
}

.tab-button.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--primary-color);
}

/* URL input field */
#source-url {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 16px;
    transition: border-color 0.3s;
}

#source-url:focus {
    border-color: var(--primary-color);
    outline: none;
}