/* =========================================================
   study-navigation.php 専用
   ========================================================= */

.study-nav-main {
    max-width: 760px;
    margin: 0 auto;
    padding: 28px 18px 60px;
}

.study-nav-article {
    color: #333;
}

.study-nav-hero {
    margin-bottom: 46px;
}

.study-nav-kicker,
.study-nav-eyebrow {
    margin: 0 0 8px;
    color: #0066cc;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .08em;
}

.study-nav-hero h1 {
    margin: 0 0 18px;
    color: #062852;
    font-family: 'Noto Serif JP', serif;
    font-size: 26px;
    line-height: 1.5;
}

.study-nav-hero-lead {
    margin: 0 0 14px;
    padding-left: 14px;
    border-left: 3px solid #062852;
    color: #333;
    font-size: 15px;
    font-weight: 500;
    line-height: 1.9;
}

.study-nav-hero-text {
    margin: 0;
    color: #555;
    font-size: 14px;
    line-height: 1.9;
}

.study-nav-section {
    margin: 0 0 52px;
}

.study-nav-section--soft {
    padding: 26px;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    scroll-margin-top: 90px;
}

.study-nav-heading {
    margin-bottom: 22px;
}

.study-nav-heading h2 {
    margin: 0;
    padding-left: 12px;
    border-left: 4px solid #0066cc;
    color: #062852;
    font-family: 'Noto Serif JP', serif;
    font-size: 20px;
    line-height: 1.55;
}

.study-nav-heading p {
    margin: 10px 0 0;
    color: #555;
    font-size: 14px;
    line-height: 1.8;
}

.study-nav-primary-list {
    display: grid;
    gap: 16px;
}

.study-nav-primary-card {
    position: relative;
    padding: 22px 22px 20px;
    background: #fff;
    border: 1px solid #d2dfed;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(6, 40, 82, .045);
}

.study-nav-primary-card:first-child {
    border-color: #9ebbd8;
}

.study-nav-number {
    margin-bottom: 7px;
    color: #0066cc;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .08em;
}

.study-nav-primary-card h3,
.study-nav-purpose-grid h3,
.study-nav-route-list h3 {
    margin: 0 0 9px;
    color: #062852;
    font-family: 'Noto Serif JP', serif;
    font-size: 16px;
    line-height: 1.65;
}

.study-nav-primary-card p,
.study-nav-purpose-grid p,
.study-nav-route-list p {
    margin: 0 0 15px;
    color: #555;
    font-size: 13.5px;
    line-height: 1.8;
}

.study-nav-main-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #0066cc;
    font-size: 14px;
    font-weight: 700;
    line-height: 1.7;
    text-decoration: none;
}

.study-nav-main-link:hover,
.study-nav-sub-link:hover,
.study-nav-inline-links a:hover,
.study-nav-purpose-grid a:hover,
.study-nav-school-list a:hover span,
.study-nav-trust a:hover strong {
    text-decoration: underline;
}

.study-nav-main-link--small {
    font-size: 13.5px;
}

.study-nav-sub-link {
    display: block;
    width: fit-content;
    margin-top: 9px;
    color: #526579;
    font-size: 12.5px;
    line-height: 1.7;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.study-nav-inline-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 18px;
    margin-top: 10px;
}

.study-nav-inline-links a {
    color: #526579;
    font-size: 12.5px;
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.study-nav-inline-links--stack {
    flex-direction: column;
    align-items: flex-start;
}

.study-nav-compact-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.study-nav-compact-grid a {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 14px 15px;
    color: #27445f;
    background: #fff;
    border: 1px solid #dbe4ec;
    border-radius: 7px;
    font-size: 13px;
    font-weight: 600;
    line-height: 1.65;
    text-decoration: none;
}

.study-nav-compact-grid a:hover {
    border-color: #9ebbd8;
    background: #f8fbff;
}

.study-nav-compact-grid a span {
    flex-shrink: 0;
    color: #0066cc;
}

.study-nav-school-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.study-nav-school-list a {
    display: block;
    padding: 14px 15px;
    background: #fff;
    border: 1px solid #dbe4ec;
    border-radius: 7px;
    text-decoration: none;
}

.study-nav-school-list strong {
    display: block;
    margin-bottom: 5px;
    color: #062852;
    font-size: 13.5px;
    line-height: 1.6;
}

.study-nav-school-list span {
    color: #526579;
    font-size: 12.5px;
    line-height: 1.6;
}

.study-nav-note {
    margin: 15px 0 0;
    color: #666;
    font-size: 12.5px;
    line-height: 1.8;
}

.study-nav-purpose-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.study-nav-purpose-grid article,
.study-nav-route-list article {
    padding: 18px;
    background: #fff;
    border: 1px solid #dbe4ec;
    border-radius: 8px;
}

.study-nav-purpose-grid a {
    color: #0066cc;
    font-size: 13px;
    font-weight: 700;
    line-height: 1.6;
    text-decoration: none;
}

.study-nav-route-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.study-nav-trust {
    margin: 4px 0 46px;
    padding: 20px 22px;
    background: #f8fafc;
    border-top: 1px solid #d2dfed;
    border-bottom: 1px solid #d2dfed;
}

.study-nav-trust h2 {
    margin: 0 0 14px;
    color: #062852;
    font-family: 'Noto Serif JP', serif;
    font-size: 16px;
    line-height: 1.6;
}

.study-nav-trust-links {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 20px;
}

.study-nav-trust a {
    display: block;
    text-decoration: none;
}

.study-nav-trust a span {
    display: block;
    margin-bottom: 4px;
    color: #555;
    font-size: 12.5px;
    line-height: 1.6;
}

.study-nav-trust a strong {
    color: #0066cc;
    font-size: 13px;
    line-height: 1.6;
}

.study-nav-cta {
    padding: 28px 24px;
    text-align: center;
    background: #f5f8fb;
    border: 1px solid #d2dfed;
    border-radius: 10px;
}

.study-nav-cta h2 {
    margin: 0 0 12px;
    color: #062852;
    font-family: 'Noto Serif JP', serif;
    font-size: 19px;
    line-height: 1.6;
}

.study-nav-cta p {
    max-width: 580px;
    margin: 0 auto 20px;
    color: #555;
    font-size: 14px;
    line-height: 1.85;
}

.study-nav-cta-button {
    display: inline-flex;
    width: auto;
    min-width: 230px;
    justify-content: center;
}


/* 高校入学直後・高1向けの入口 */
.study-nav-start {
    margin: -12px 0 46px;
    padding: 22px 24px;
    background: #f8fbff;
    border: 1px solid #c9dced;
    border-left: 4px solid #0066cc;
    border-radius: 8px;
}

.study-nav-start-label {
    margin: 0 0 7px;
    color: #0066cc;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .04em;
}

.study-nav-start h2 {
    margin: 0 0 10px;
    color: #062852;
    font-family: 'Noto Serif JP', serif;
    font-size: 18px;
    line-height: 1.6;
}

.study-nav-start p:not(.study-nav-start-label) {
    margin: 0 0 13px;
    color: #555;
    font-size: 13.5px;
    line-height: 1.8;
}

@media (max-width: 767px) {
    .study-nav-main {
        padding: 22px 15px 45px;
    }

    .study-nav-hero {
        margin-bottom: 38px;
    }

    .study-nav-start {
        margin: -8px 0 38px;
        padding: 18px 17px;
    }

    .study-nav-start h2 {
        font-size: 16px;
    }

    .study-nav-hero h1 {
        font-size: 22px;
    }

    .study-nav-hero-lead {
        font-size: 14px;
    }

    .study-nav-section {
        margin-bottom: 42px;
    }

    .study-nav-section--soft {
        padding: 20px 15px;
    }

    .study-nav-heading h2 {
        font-size: 18px;
    }

    .study-nav-primary-card {
        padding: 18px 17px;
    }

    .study-nav-primary-card h3 {
        font-size: 15px;
    }

    .study-nav-compact-grid,
    .study-nav-school-list,
    .study-nav-purpose-grid,
    .study-nav-route-list,
    .study-nav-trust-links {
        grid-template-columns: 1fr;
    }

    .study-nav-compact-grid a {
        padding: 12px 13px;
    }

    .study-nav-trust {
        padding: 18px 16px;
    }

    .study-nav-cta {
        padding: 24px 17px;
    }

    .study-nav-cta-button {
        width: 100%;
        min-width: 0;
    }
}

.study-nav-parent-link {
    margin: 28px 0 46px;
    padding: 22px 24px;
    background: #fff;
    border: 1px solid #d7e0e8;
    border-radius: 10px;
}

.study-nav-parent-link .study-nav-parent-title {
    margin: 0 0 8px;
    font-family: 'Noto Serif JP', serif;
    font-size: 18px;
    font-weight: 700;
    color: #062852;
}

.study-nav-parent-link p {
    margin: 0;
    line-height: 1.8;
    color: #555;
}

.study-nav-parent-link a,
.study-nav-parent-link a:visited {
    display: inline-block;
    margin-top: 10px;
    color: #0066cc;
    font-weight: 700;
    text-decoration: none;
}