/* login.css */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f4f7f9; /* 少し青みのあるグレーで清潔感を */
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.login-wrapper {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-card {
    background: #ffffff;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    margin: 0;
    font-size: 24px;
    color: #333;
    letter-spacing: 1px;
}

.login-header p {
    margin: 5px 0 0;
    color: #999;
    font-size: 14px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 13px;
    font-weight: 600;
    color: #555;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    background: #fafafa;
    transition: all 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #007bff;
    background: #fff;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.submit-btn {
    width: 100%;
    padding: 12px;
    background: #333; /* 落ち着いた黒系 */
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

.submit-btn:hover {
    background: #000;
}

.error-area {
    margin-top: 20px;
    padding: 10px;
    background: #fff0f0;
    border-left: 4px solid #ff4d4d;
    color: #d93025;
    font-size: 13px;
}