body {
    font-family: 'Segoe UI', sans-serif;
    background: #f8f9fa;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1000px;
    margin: 30px auto;
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #eee;
    padding-bottom: 15px;
    margin-bottom: 20px;
}

.btn {
    padding: 10px 18px;
    border-radius: 5px;
    border: none;
    cursor: pointer;
    text-decoration: none;
    font-size: 14px;
    display: inline-block;
    transition: 0.2s;
}

.btn-primary {
    background: #1a73e8;
    color: white;
}

.btn-secondary {
    background: #f1f3f4;
    color: #3c4043;
    border: 1px solid #dadce0;
}

.btn-danger {
    background: #ea4335;
    color: white;
}

.editor-container {
    height: 75vh;
    display: flex;
    flex-direction: column;
}

.editor-textarea {
    flex-grow: 1;
    border: 1px solid #dadce0;
    padding: 60px;
    font-size: 16px;
    resize: none;
    outline: none;
    line-height: 1.6;
    font-family: 'Courier New', monospace;
}

.file-item {
    border-bottom: 1px solid #eee;
    padding: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

input,
select {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: 1px solid #dadce0;
    border-radius: 4px;
    box-sizing: border-box;
}

.alert {
    padding: 15px;
    border-radius: 4px;
    margin-bottom: 20px;
    font-size: 14px;
    background: #e6f4ea;
    color: #137333;
}