/* Upload System Styles */
:root {
    --primary-color: #6a1b9a;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --dark-bg: #1a1a2e;
    --card-bg: #16213e;
    --text-light: #e0e0e0;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--dark-bg) 0%, #0f0f1e 100%);
    color: var(--text-light);
    min-height: 100vh;
    padding: 20px;
}

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

/* Header */
.upload-header {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 20px;
}

.upload-header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.upload-header p {
    font-size: 1.1em;
    color: #a0a0a0;
}

/* Back Link */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--secondary-color);
    text-decoration: none;
    margin-bottom: 30px;
    font-size: 1.1em;
    transition: all 0.3s ease;
}

.back-link:hover {
    gap: 12px;
    color: var(--primary-color);
}

/* Upload Card */
.upload-card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(139, 92, 246, 0.2);
}

/* Auth Section */
.auth-section {
    text-align: center;
    padding: 60px 20px;
}

.auth-section h2 {
    font-size: 1.8em;
    margin-bottom: 15px;
}

.auth-section p {
    color: #a0a0a0;
    margin-bottom: 30px;
    font-size: 1.1em;
}

.github-login-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: linear-gradient(135deg, #333, #24292e);
    color: white;
    padding: 15px 40px;
    border: none;
    border-radius: 12px;
    font-size: 1.2em;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.github-login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.github-login-btn i {
    font-size: 1.5em;
}

/* User Info */
.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: rgba(139, 92, 246, 0.1);
    border-radius: 12px;
    margin-bottom: 30px;
}

.user-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 2px solid var(--secondary-color);
}

.user-details h3 {
    font-size: 1.2em;
    margin-bottom: 5px;
}

.user-details p {
    color: #a0a0a0;
    font-size: 0.9em;
}

.logout-btn {
    margin-left: auto;
    background: transparent;
    border: 1px solid var(--danger-color);
    color: var(--danger-color);
    padding: 8px 20px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

/* Form */
.upload-form {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.form-group label {
    font-size: 1.1em;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-group label i {
    color: var(--secondary-color);
}

.form-group input,
.form-group textarea,
.form-group select {
    padding: 15px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(139, 92, 246, 0.3);
    border-radius: 12px;
    color: var(--text-light);
    font-size: 1em;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--secondary-color);
    background: rgba(139, 92, 246, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
    font-family: inherit;
}

/* Radio Group */
.radio-group {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.radio-option {
    flex: 1;
    min-width: 150px;
}

.radio-option input[type="radio"] {
    display: none;
}

.radio-option label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(139, 92, 246, 0.3);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.radio-option input[type="radio"]:checked + label {
    background: rgba(139, 92, 246, 0.2);
    border-color: var(--secondary-color);
}

.radio-option label:hover {
    border-color: var(--secondary-color);
}

/* File Upload */
.file-upload {
    position: relative;
    padding: 40px;
    border: 3px dashed rgba(139, 92, 246, 0.5);
    border-radius: 12px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: rgba(139, 92, 246, 0.05);
}

.file-upload:hover {
    border-color: var(--secondary-color);
    background: rgba(139, 92, 246, 0.1);
}

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

.file-upload i {
    font-size: 3em;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.file-upload p {
    font-size: 1.1em;
    margin-bottom: 5px;
}

.file-upload small {
    color: #a0a0a0;
    font-size: 0.9em;
}

.file-info {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: rgba(16, 185, 129, 0.1);
    border: 2px solid var(--success-color);
    border-radius: 12px;
    margin-top: 15px;
}

.file-info i {
    font-size: 2em;
    color: var(--success-color);
}

.file-info .file-details h4 {
    margin-bottom: 5px;
}

.file-info .file-details p {
    color: #a0a0a0;
    font-size: 0.9em;
}

.remove-file {
    margin-left: auto;
    background: transparent;
    border: none;
    color: var(--danger-color);
    cursor: pointer;
    font-size: 1.5em;
    transition: transform 0.2s ease;
}

.remove-file:hover {
    transform: scale(1.2);
}

/* Progress Bar */
.progress-section {
    display: none;
    margin-top: 30px;
}

.progress-section.active {
    display: block;
}

.progress-bar {
    width: 100%;
    height: 30px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    overflow: hidden;
    margin-bottom: 15px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    width: 0%;
    transition: width 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}

.progress-status {
    text-align: center;
    color: #a0a0a0;
}

/* Submit Button */
.submit-btn {
    padding: 18px 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.2em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 4px 15px rgba(106, 27, 154, 0.3);
}

.submit-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(106, 27, 154, 0.4);
}

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

/* Success Message */
.success-message {
    display: none;
    text-align: center;
    padding: 40px;
}

.success-message.active {
    display: block;
}

.success-icon {
    font-size: 4em;
    color: var(--success-color);
    margin-bottom: 20px;
}

.success-message h2 {
    font-size: 2em;
    margin-bottom: 15px;
    color: var(--success-color);
}

.success-message p {
    font-size: 1.1em;
    color: #a0a0a0;
    margin-bottom: 30px;
}

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

.success-actions a,
.success-actions button {
    padding: 12px 30px;
    border-radius: 10px;
    text-decoration: none;
    font-size: 1.1em;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

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

.btn-primary:hover,
.btn-secondary:hover {
    transform: translateY(-2px);
}

/* Error Message */
.error-message {
    display: none;
    padding: 15px;
    background: rgba(239, 68, 68, 0.1);
    border: 2px solid var(--danger-color);
    border-radius: 12px;
    color: var(--danger-color);
    margin-top: 20px;
}

.error-message.active {
    display: flex;
    align-items: center;
    gap: 10px;
}

.error-message i {
    font-size: 1.5em;
}

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

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Responsive */
@media (max-width: 768px) {
    .upload-header h1 {
        font-size: 2em;
    }
    
    .upload-card {
        padding: 25px;
    }
    
    .radio-group {
        flex-direction: column;
    }
    
    .radio-option {
        min-width: 100%;
    }
    
    .success-actions {
        flex-direction: column;
    }
    
    .success-actions a,
    .success-actions button {
        width: 100%;
    }
}