/* ========================================
   リセットCSS
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-main);
    font-weight: var(--font-weight);
    color: var(--text-color-1);
    background-color: var(--primary-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    vertical-align: bottom;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: opacity 0.3s ease;
}

a:hover {
    opacity: 0.7;
}

ul, ol {
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-main);
    font-weight: var(--font-weight);
    line-height: 1.4;
}

/* ========================================
   共通レイアウトクラス
   ======================================== */
.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 20px;
}

.site-main {
    padding: 40px 0;
}

.entry-header {
    margin-bottom: 40px;
}

.entry-title {
    font-size: 2.4rem;
    margin-bottom: 20px;
    padding: 40px 0;
    text-align: center;
    font-weight: 900;
    font-style: italic;
    letter-spacing: 0.1em;
    position: relative;
    overflow: hidden;
}

.entry-title::before {
    content: attr(data-title);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 6rem;
    font-weight: 900;
    font-style: italic;
    letter-spacing: 0.1em;
    color: currentColor;
    opacity: 0.18;
    white-space: nowrap;
    z-index: 0;
    pointer-events: none;
    line-height: 1;
}

.entry-title > * {
    position: relative;
    z-index: 1;
}

.entry-content {
    max-width: 800px;
    line-height: 1.8;
    margin: 0 auto;
    padding: 0 20px;
}

.section-title {
    margin-bottom: 40px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--secondary-color);
    color: var(--text-color-2);
    font-size: 2rem;
    text-align: center;
}

.entry-content .section-title {
    color: var(--text-color-1);
}

.section-content {
    margin-bottom: 30px;
    line-height: 1.8;
}

@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    .section-title {
        font-size: 1.5rem;
    }
    .entry-title::before {
        font-size: 5.4rem;
    }
}

@media (max-width: 480px) {
    .entry-title::before {
        font-size: 4.8rem;
    }
}