/* =========================================================
BASIC
デザイン一覧：見出し・カード・見本の色
========================================================= */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--mf-paper);
    color: var(--mf-ink);
    font-family: var(--mf-font-ja);
    line-height: 1.8;
}

a {
    color: inherit;
}

.container {
    max-width: 1320px;
    padding: 56px 40px 72px;
    margin: auto;
}

.brand {
    margin: 0 0 32px;
    color: var(--mf-blue);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.04em;
}

.brand,
.sample-number,
.card-label,
.section-top > p {
    font-family: var(--mf-font-en);
}

header {
    max-width: 760px;
}

h1 {
    margin: 0 0 20px;
    font-size: 44px;
    line-height: 1.5;
    letter-spacing: -0.02em;
}

header > p {
    font-size: 15px;
    color: var(--mf-muted);
}

nav {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 28px;
}

nav a {
    display: inline-block;
    padding: 10px 18px;
    border: 1px solid var(--mf-line);
    border-radius: 6px;
    text-decoration: none;
    font-size: 14px;
    background: var(--mf-white);
}

section {
    margin-top: 64px;
    scroll-margin-top: 24px;
}

.section-top {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 8px 20px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--mf-line);
    margin-bottom: 24px;
}

h2 {
    margin: 0;
    font-size: 23px;
}

.section-top p {
    margin: 0;
    font-size: 13px;
    color: var(--mf-muted);
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
}

.design-card {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--mf-line);
    border-radius: 10px;
    background: var(--mf-white);
    text-decoration: none;
    overflow: hidden;
}

.design-card:hover {
    border-color: var(--mf-blue);
}

a:focus-visible {
    outline: 3px solid var(--mf-blue);
    outline-offset: 4px;
}

.color-sample {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    height: 174px;
    background: var(--sample-bg);
    border-bottom: 1px solid var(--mf-line);
}

.sample-panel {
    display: block;
    width: 128px;
    padding: 20px;
    background: var(--mf-white);
    border: 1px solid var(--mf-line);
    border-radius: 3px;
    box-shadow: 0 8px 12px rgba(21, 34, 59, 0.031372549);
}

.sample-panel i,
.sample-panel b,
.sample-panel em {
    display: block;
}

.sample-panel i {
    width: 42px;
    height: 5px;
    background: var(--sample-accent);
    margin-bottom: 16px;
}

.sample-panel b {
    height: 16px;
    margin-bottom: 8px;
    background: var(--sample-field);
    border: 1px solid var(--mf-line);
}

.sample-panel em {
    width: 42px;
    height: 10px;
    margin: 12px auto 0;
    background: var(--sample-accent);
}

.sample-number {
    position: absolute;
    right: 16px;
    bottom: 12px;
    display: grid;
    place-items: center;
    width: 32px;
    height: 32px;
    background: var(--mf-white);
    color: var(--mf-ink);
    border: 1px solid var(--mf-line);
    font-size: 11px;
    border-radius: 50%;
}

.card-copy {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: 24px;
}

.card-label {
    display: flex;
    justify-content: space-between;
    margin: 0 0 10px;
    color: var(--mf-muted);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.08em;
}

h3 {
    margin: 0 0 10px;
    font-size: 19px;
}

.card-copy > p:not(.card-label) {
    margin: 0 0 20px;
    color: var(--mf-muted);
    font-size: 13px;
}

.view-link {
    margin-top: auto;
    color: var(--mf-blue);
    font-size: 13px;
    font-weight: 700;
    text-decoration: underline;
    text-underline-offset: 4px;
}

.footnote {
    margin: 36px 0 0;
    font-size: 12px;
    color: var(--mf-muted);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
}

/* -----------------------------------
Responsive: 1024–1280 (Small PC)
----------------------------------- */
@media (min-width: 1024px) and (max-width: 1280px) {
    .container {
        padding: 48px 32px 64px;
    }
    h1 {
        font-size: 40px;
    }
}
/* -----------------------------------
Responsive: 768–1023 (Tablet)
----------------------------------- */
@media (min-width: 768px) and (max-width: 1023px) {
    .container {
        padding: 40px 28px 56px;
    }
    h1 {
        font-size: 36px;
    }
    .grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}
/* -----------------------------------
Responsive: ～767 (Mobile)
----------------------------------- */
@media (max-width: 767px) {
    .container {
        padding: 32px 20px 48px;
    }
    h1 {
        font-size: 28px;
    }
    .grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    section {
        margin-top: 44px;
    }
    .color-sample {
        height: 148px;
    }
}