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

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;
    line-height: 1.4;
    font-size: 14px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background: white;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.25);
    padding: 30px 40px;
}

header {
    text-align: center;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 2px solid #f0f0f0;
}

header h1 {
    font-size: 26px;
    color: #333;
    margin-bottom: 5px;
}

header p {
    color: #666;
    font-size: 14px;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 20px;
}

.form-column {
    min-width: 0;
}

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

.form-section h2 {
    font-size: 16px;
    color: #444;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid #e0e0e0;
}

.form-group {
    margin-bottom: 14px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: #333;
    font-size: 13px;
}

input[type="text"],
input[type="email"],
input[type="datetime-local"],
textarea {
    width: 100%;
    padding: 8px 12px;
    border: 2px solid #e0e0e0;
    border-radius: 4px;
    font-size: 13px;
    font-family: inherit;
    transition: border-color 0.3s, box-shadow 0.3s;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="datetime-local"]:focus,
textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

input[type="file"] {
    width: 100%;
    padding: 8px;
    border: 2px dashed #e0e0e0;
    border-radius: 4px;
    cursor: pointer;
    transition: border-color 0.3s;
    font-size: 13px;
}

input[type="file"]:hover {
    border-color: #667eea;
}

small {
    display: block;
    margin-top: 4px;
    color: #666;
    font-size: 11px;
}

#fileList {
    margin-top: 8px;
    padding: 8px;
    background: #f8f9fa;
    border-radius: 4px;
    font-size: 12px;
    max-height: 120px;
    overflow-y: auto;
}

.file-item {
    padding: 3px 0;
    color: #333;
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 2px solid #f0f0f0;
}

.btn {
    padding: 10px 24px;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    flex: 1;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.3);
}

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

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: #f0f0f0;
    color: #333;
}

.btn-secondary:hover {
    background: #e0e0e0;
}

.message {
    margin-top: 15px;
    padding: 12px 16px;
    border-radius: 4px;
    font-size: 13px;
}

.message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.spinner {
    display: inline-block;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .container {
        max-width: 1000px;
    }

    .form-grid {
        gap: 20px;
    }
}

@media (max-width: 900px) {
    .form-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .container {
        padding: 25px 30px;
    }
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .container {
        padding: 20px;
    }

    header h1 {
        font-size: 20px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 480px) {
    body {
        padding: 5px;
    }

    .container {
        padding: 15px;
    }

    header h1 {
        font-size: 18px;
    }

    .form-section h2 {
        font-size: 14px;
    }
}

/* Optimizations for larger screens */
@media (min-width: 1920px) {
    .container {
        max-width: 1600px;
    }

    body {
        padding: 30px;
    }

    .form-grid {
        gap: 40px;
    }
}