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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family:
        "Inter",
        "Noto Sans JP",
        "Segoe UI",
        sans-serif;

    background: #ffffff;
    color: #111111;

    line-height: 1.7;
    letter-spacing: 0.02em;

    min-height: 100vh;

    padding: 2rem;
}

.container {
    width: 100%;
    max-width: 960px;
    margin: 0 auto;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1rem;
}

a {
    color: inherit;
    text-decoration: none;
    border-bottom: 1px solid #cccccc;
    transition: 0.2s ease;
}

a:hover {
    opacity: 0.7;
}

input,
textarea,
button {
    font: inherit;
}

input,
textarea {
    width: 100%;
    padding: 0.75rem 1rem;

    border: 1px solid #dddddd;
    border-radius: 8px;

    background: #ffffff;
    color: #111111;
}

button {
    padding: 0.75rem 1.25rem;

    border: none;
    border-radius: 8px;

    background: #111111;
    color: #ffffff;

    cursor: pointer;
    transition: 0.2s ease;
}

button:hover {
    opacity: 0.85;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

@media (max-width: 768px) {
    body {
        padding: 1.25rem;
        font-size: 0.95rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

}

.page_title {
    margin-top: 1.0rem;
}