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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #f5f5f5 0%, #e0e0e0 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 700px;
    width: 100%;
    padding: 40px;
}

.header {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 3px solid rgb(244, 134, 49);
}

.header .logo {
    max-width: 200px;
    height: auto;
    margin-bottom: 20px;
}

.header h1 {
    color: rgb(244, 134, 49);
    font-size: 2em;
    margin-bottom: 10px;
}

.subtitle {
    color: #666;
    font-size: 1em;
    margin-top: 10px;
}

.upload-form {
    margin-bottom: 30px;
}

.upload-area {
    border: 3px dashed rgb(244, 134, 49);
    border-radius: 15px;
    padding: 60px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #f8f9fa;
    margin-bottom: 20px;
}

.upload-area:hover {
    background: #f0f0f0;
    border-color: rgb(210, 100, 30);
}

.upload-area.drag-over {
    background: #f0f0f0;
    border-color: rgb(210, 100, 30);
    transform: scale(1.02);
}

.upload-area.has-file {
    background: #e8f5e9;
    border-color: #4caf50;
}

.upload-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.upload-text {
    font-size: 1.2em;
    color: #333;
    font-weight: bold;
    margin-bottom: 10px;
}

.upload-hint {
    font-size: 0.9em;
    color: #666;
}

.file-info {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 20px;
    border-left: 4px solid rgb(244, 134, 49);
}

.file-info p {
    margin-bottom: 5px;
    color: #333;
}

.file-size {
    font-size: 0.9em;
    color: #666;
}

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

.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 25px;
    font-weight: bold;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, rgb(244, 134, 49) 0%, rgb(210, 100, 30) 100%);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(244, 134, 49, 0.4);
}

.btn-primary:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: #f8f9fa;
    color: #333;
    border: 2px solid #ddd;
}

.btn-secondary:hover {
    background: #e9ecef;
    border-color: #ccc;
}

.info-box {
    background: #e3f2fd;
    border-left: 4px solid #2196f3;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 30px;
}

.info-box h3 {
    color: #1976d2;
    margin-bottom: 15px;
    font-size: 1.1em;
}

.info-box ul {
    list-style: none;
    padding-left: 0;
}

.info-box li {
    color: #333;
    margin-bottom: 10px;
    padding-left: 25px;
    position: relative;
}

.info-box li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #4caf50;
    font-weight: bold;
}

.footer {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #ddd;
}

.back-link {
    color: rgb(244, 134, 49);
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s;
}

.back-link:hover {
    color: rgb(210, 100, 30);
    text-decoration: underline;
}

@media (max-width: 600px) {
    .container {
        padding: 20px;
    }
    
    .header h1 {
        font-size: 1.5em;
    }
    
    .upload-area {
        padding: 40px 15px;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}