/* ---------- リセット・ベース ---------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: var(--font-ja);
    line-height: 1.8;
    color: var(--color-text);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
}

body.nav-open {
    overflow: hidden;
}

a {
    color: var(--color-green);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--color-green-dark);
}

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

ul {
    list-style: none;
}

.sp-only {
    display: none;
}

.pc-only {
    display: inline;
}

.screen-reader-text {
    border: 0;
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute !important;
    width: 1px;
    white-space: nowrap;
}

.skip-link {
    position: absolute;
    top: 0.5rem;
    left: 0.5rem;
    z-index: 2000;
    padding: 0.75rem 1rem;
    background: var(--color-navy);
    color: var(--color-white);
    border-radius: 4px;
}

.skip-link:focus {
    clip: auto !important;
    clip-path: none !important;
    width: auto !important;
    height: auto !important;
    margin: 0 !important;
    overflow: visible !important;
    white-space: normal !important;
}

/* ==========================================================================
   コートライン装飾 — ページ全体を貫く縦線
   ========================================================================== */
#page {
    position: relative;
}

/* 左サイドライン */
#page::before {
    content: "";
    position: absolute;
    top: 0;
    left: var(--side-margin);
    width: 1px;
    height: 100%;
    background: var(--color-line);
    z-index: 10;
    pointer-events: none;
}

/* 右サイドライン */
#page::after {
    content: "";
    position: absolute;
    top: 0;
    right: var(--side-margin);
    width: 1px;
    height: 100%;
    background: var(--color-line);
    z-index: 10;
    pointer-events: none;
}

.site-main {
    position: relative;
}