/* CSN academic portal design system (2026). */
:root {
    --color-ink: #1d2a1e;
    --color-muted: #556356;
    --color-subtle: #718073;
    --color-surface: #ffffff;
    --color-canvas: #f3f3f3;
    --color-border: #dce3d8;
    --color-primary: #006234;
    --color-primary-strong: #004b28;
    --color-primary-soft: #f0f7e8;
    --color-ycu-green: #8fc231;
    --color-focus: #8fc231;
    --shadow-card: 0 1px 2px rgba(29, 42, 30, 0.06), 0 12px 32px rgba(29, 42, 30, 0.05);
    --radius-sm: 0.5rem;
    --radius-md: 0.875rem;
    --content-width: 72rem;
}

html { color-scheme: light; font-size: 100%; scroll-behavior: smooth; }
html, body { min-width: 0; width: 100%; min-height: 100%; margin: 0; background: var(--color-canvas); }
body {
    color: var(--color-ink);
    font-family: Inter, "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, system-ui, -apple-system, sans-serif;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}
*, *::before, *::after { box-sizing: border-box; }
img, svg, canvas { max-width: 100%; }

a, a:link, a:visited {
    color: var(--color-primary);
    background: transparent;
    text-decoration: underline;
    text-decoration-color: color-mix(in srgb, var(--color-primary) 45%, transparent);
    text-decoration-thickness: 0.08em;
    text-underline-offset: 0.2em;
}
a:hover { color: var(--color-primary-strong); text-decoration-color: currentColor; }
a:focus-visible, button:focus-visible, [tabindex]:focus-visible {
    outline: 3px solid var(--color-focus);
    outline-offset: 3px;
    border-radius: 0.15rem;
}
p, li, td, th { font-size: 1rem; }
p { max-width: none; margin: 0 0 1rem; }
ul, ol { padding-left: 1.4rem; }
li + li { margin-top: 0.35rem; }
h1, h2, h3 { color: var(--color-ink); font-weight: 700; letter-spacing: -0.02em; line-height: 1.3; }
h1 { margin: 0; font-size: clamp(1.9rem, 4vw, 3rem); }
h2 { margin: 0 0 1rem; font-size: clamp(1.35rem, 2.4vw, 1.75rem); }
h3 { margin: 1.5rem 0 0.65rem; font-size: 1.15rem; }
#container { min-height: 100vh; }

.site-header {
    position: sticky;
    z-index: 1000;
    top: 0;
    padding: 0;
    border: 0;
    border-top: 0.35rem solid var(--color-ycu-green);
    border-bottom: 1px solid var(--color-border);
    background: rgba(255, 255, 255, 0.97);
    box-shadow: 0 2px 16px rgba(29, 42, 30, 0.08);
    opacity: 1;
    backdrop-filter: blur(16px);
}
.site-navigation {
    display: flex;
    width: min(100% - 2rem, var(--content-width));
    min-height: 4.5rem;
    margin: 0 auto;
    align-items: center;
    gap: 1rem 2rem;
}
.site-brand, .site-brand:link, .site-brand:visited {
    display: flex;
    flex: 0 0 auto;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-primary);
    text-decoration: none;
}
.site-brand-mark {
    display: grid;
    width: 2.35rem;
    height: 2.35rem;
    border: 1px solid var(--color-ycu-green);
    border-radius: 50%;
    color: #23410f;
    background: var(--color-ycu-green);
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    place-items: center;
}
.site-brand-text { display: grid; line-height: 1.15; }
.site-brand-text strong { font-size: 1rem; letter-spacing: 0.01em; }
.site-brand-text small { color: var(--color-muted); font-size: 0.72rem; }
.site-nav-links { display: flex; margin-left: auto; align-items: center; gap: 0.2rem; }
.site-nav-link, .site-nav-link:link, .site-nav-link:visited {
    position: relative;
    padding: 0.65rem 0.75rem;
    border-radius: 0.45rem;
    color: var(--color-primary);
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.25;
    text-decoration: none;
}
.site-nav-link:hover { color: var(--color-primary-strong); background: var(--color-primary-soft); }
.site-nav-link[aria-current="page"] { color: var(--color-primary-strong); background: #e8f3d8; }
.site-nav-link[aria-current="page"]::after {
    position: absolute;
    right: 0.75rem;
    bottom: 0.25rem;
    left: 0.75rem;
    height: 2px;
    border-radius: 999px;
    background: var(--color-ycu-green);
    content: "";
}

#container > header {
    padding: clamp(2.75rem, 7vw, 5.5rem) max(1rem, calc((100% - var(--content-width)) / 2));
    color: var(--color-ink);
    border-bottom: 1px solid #d7e4c8;
    background: radial-gradient(circle at 80% 15%, rgba(143, 194, 49, 0.34), transparent 36%), linear-gradient(135deg, #f7faef 0%, #e6f1d6 100%);
}
#container > header h1 { max-width: var(--content-width); color: var(--color-ink); }
#container > header h1::before {
    display: block;
    margin-bottom: 0.65rem;
    color: var(--color-primary);
    content: "SEISMIC DATA & LINKED OPEN DATA";
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.14em;
}
section {
    width: min(100% - 2rem, var(--content-width));
    margin: 1.5rem auto;
    padding: clamp(1.35rem, 3vw, 2.25rem);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    box-shadow: var(--shadow-card);
}
section > h2:first-child {
    position: relative;
    margin: -0.25rem 0 1.35rem;
    padding: 0.75rem 1rem;
    border: 0;
    border-left: 0.35rem solid var(--color-primary);
    border-bottom: 1px solid var(--color-border);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    background: linear-gradient(90deg, var(--color-primary-soft), rgba(238, 246, 231, 0.18));
}
section > h3:not(:first-child) {
    padding-bottom: 0.45rem;
    border-bottom: 2px solid var(--color-primary-soft);
}
.portal-intro { padding-top: clamp(1.75rem, 4vw, 3rem); padding-bottom: clamp(1.75rem, 4vw, 3rem); }
.portal-intro h2 { max-width: none; margin-left: 0; padding-left: 0; border: 0; background: transparent; font-size: clamp(1.65rem, 3vw, 2.35rem); }
.eyebrow, .card-kicker {
    margin-bottom: 0.55rem;
    color: var(--color-primary);
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.12em;
}
.lead { max-width: none; color: #425044; font-size: clamp(1.05rem, 1.7vw, 1.2rem); line-height: 1.8; }
.quick-actions { display: flex; margin-top: 1.5rem; flex-wrap: wrap; gap: 0.75rem; }
.primary-action, .secondary-action,
.primary-action:link, .primary-action:visited,
.secondary-action:link, .secondary-action:visited {
    display: inline-flex;
    min-height: 2.9rem;
    padding: 0.65rem 1rem;
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-sm);
    align-items: center;
    gap: 0.7rem;
    font-weight: 700;
    text-decoration: none;
}
.primary-action, .primary-action:link, .primary-action:visited { color: #fff; background: var(--color-primary); }
.primary-action:hover { color: #fff; background: var(--color-primary-strong); }
.secondary-action, .secondary-action:link, .secondary-action:visited { color: var(--color-primary); background: #fff; }
.secondary-action:hover { background: var(--color-primary-soft); }
.language-switcher {
    display: flex;
    width: min(100% - 2rem, var(--content-width));
    margin: 1.5rem auto 0;
    padding: 0;
    align-items: center;
    justify-content: flex-end;
    gap: 0.25rem;
    color: var(--color-subtle);
    font-size: 0.9rem;
}
.language-switcher a { padding: 0.35rem 0.65rem; border-radius: 999px; font-weight: 600; text-decoration: none; }
.language-switcher [aria-current="page"] { color: var(--color-primary-strong); background: var(--color-primary-soft); }

.responsive-table, .code-scroll { max-width: 100%; overflow-x: auto; border-radius: var(--radius-sm); -webkit-overflow-scrolling: touch; }
.responsive-table { border: 1px solid var(--color-border); }
.responsive-table table { width: 100%; min-width: 640px; border-collapse: collapse; }
.responsive-table th, .responsive-table td { padding: 0.9rem 1rem; border-bottom: 1px solid var(--color-border); text-align: left; vertical-align: top; }
.responsive-table th { color: #344735; background: #f0f5ed; font-size: 0.86rem; letter-spacing: 0.025em; }
.responsive-table tbody tr:last-child td { border-bottom: 0; }
.code-scroll { border: 1px solid #26394a; background: #122536; }
.code-scroll pre { min-width: 680px; margin: 0; padding: 1.25rem; color: #e2edf3; font: 0.9rem/1.65 "SFMono-Regular", Consolas, "Liberation Mono", monospace; }
.status-notice {
    max-width: none;
    padding: 1rem 1.15rem;
    border: 1px solid #e3c77d;
    border-left: 0.3rem solid #b7791f;
    border-radius: var(--radius-sm);
    color: #594112;
    background: #fff9e8;
}
.service-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 270px), 1fr)); gap: 1rem; }
.service-card {
    display: flex;
    min-height: 13rem;
    padding: 1.35rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: #fcfdfb;
    flex-direction: column;
    transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}
.service-card:hover { border-color: #a9c69d; box-shadow: 0 10px 24px rgba(29, 42, 30, 0.08); transform: translateY(-2px); }
.service-card h3 { margin-top: 0; }
.service-card p { color: var(--color-muted); }
.service-status { display: inline-block; width: fit-content; margin: auto 0 0; padding: 0.25rem 0.65rem; border-radius: 999px; font-size: 0.78rem; font-weight: 700; }
.service-status-available { color: #166534; background: #dcfce7; }
.service-status-planned { color: #854d0e; background: #fef3c7; }
footer {
    width: min(100% - 2rem, var(--content-width));
    height: auto;
    margin: 3rem auto 0;
    padding: 1.5rem 0 2.5rem;
    border-top: 1px solid var(--color-border);
    color: var(--color-muted);
    text-align: left;
}
footer address { margin: 0; font-size: 0.88rem; font-style: normal; }
.footer-content { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.sitemap-links { display: grid; margin: 0; padding: 0; grid-template-columns: repeat(auto-fit, minmax(min(100%, 270px), 1fr)); gap: 0.75rem; list-style: none; }
.sitemap-links li { margin: 0; }
.sitemap-links a { display: grid; height: 100%; padding: 1rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); gap: 0.25rem; text-decoration: none; }
.sitemap-links a:hover { border-color: #a9c69d; background: var(--color-primary-soft); }
.sitemap-links strong { color: var(--color-primary-strong); font-size: 1.02rem; }
.sitemap-links span { color: var(--color-muted); font-size: 0.9rem; line-height: 1.55; }

@media (max-width: 900px) {
    .site-navigation { padding: 0.75rem 0; flex-wrap: wrap; }
    .site-nav-links { width: 100%; margin: 0; padding: 0.15rem 0 0; overflow-x: auto; scrollbar-width: thin; }
    .site-nav-link { flex: 0 0 auto; white-space: nowrap; }
}
@media (max-width: 767px) {
    .site-navigation { width: min(100% - 1.25rem, var(--content-width)); }
    .site-brand-text small { display: none; }
    .site-nav-links { overflow: visible; flex-wrap: wrap; gap: 0.15rem; }
    .site-nav-link, .site-nav-link:link, .site-nav-link:visited { padding: 0.55rem 0.65rem; font-size: 0.94rem; }
    #container > header { padding-right: 1rem; padding-left: 1rem; }
    section, .language-switcher, footer { width: calc(100% - 1.25rem); }
    section { margin-top: 0.75rem; margin-bottom: 0.75rem; padding: 1.15rem; border-radius: 0.7rem; }
    .language-switcher { justify-content: flex-start; }
    .footer-content { align-items: flex-start; flex-direction: column; }
    #map-full { position: relative; margin-top: 0; }
    #map-canvas, .point_list { float: none; width: 100%; max-width: none; }
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; }
}