/* 通用样式 */
body {
    font-family: 'Segoe UI', sans-serif;
    margin: 0;
    background: #f0f2f5;
}

/* 登录页面 */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-box {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    width: 400px;
}

.error-msg {
    color: #dc3545;
    margin: 1rem 0;
    padding: 0.5rem;
    background: #f8d7da;
    border-radius: 5px;
}

.form-group input {
    width: 100%;
    padding: 12px;
    margin: 8px 0;
    border: 2px solid #ddd;
    border-radius: 6px;
    transition: border-color 0.3s;
}

.form-group input:focus {
    border-color: #667eea;
    outline: none;
}

button {
    background: #667eea;
    color: white;
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    width: 100%;
    margin-top: 1rem;
}

/* 管理后台 */
.admin-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 2rem;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.logout-btn {
    background: #dc3545;
    padding: 8px 16px;
    text-decoration: none;
}

.form-wrapper {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

select, textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 6px;
    margin-bottom: 1rem;
}

.success-msg {
    background: #d4edda;
    color: #155724;
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 6px;
}