@import url("https://fonts.googleapis.com/css2?family=Source+Sans+3:wght@400;500;600&family=Cormorant+Garamond:ital,wght@0,400;0,500;1,400&family=Lora:wght@400;500&family=Noto+Sans+SC:wght@400;500;600&display=swap");
@import url("https://cdn.jsdelivr.net/npm/lxgw-wenkai-screen-webfont@1.1.0/style.css");

:root {
    --maroon: #8a100b;
    --gold: #dbbb5b;
    --paper: #f7f4ef;
    --paper-dark: #ede8df;
    --ink: #1c1917;
    --ink-muted: #57534e;
    --line: #ddd6c8;
    --white: #fffcf7;
    --darkBg: #1a1614;
    --nav-bg: #741612;
    --nav-text: #f3ece4;
    --nav-text-dim: rgba(243, 236, 228, 0.72);
    --nav-line: rgba(243, 236, 228, 0.22);
    --font-display: "STXingkai", "华文行楷", "LXGW WenKai Screen", "Cormorant Garamond", serif;
    --font-heading: "STXingkai", "华文行楷", "LXGW WenKai Screen", "Lora", "Kaiti SC", "STKaiti", Georgia, serif;
    --font-body: "Source Sans 3", "Noto Sans SC", sans-serif;
    --font-xing: var(--font-display);
    --font-kai: var(--font-heading);
    --motion-fast: 180ms;
    --motion-enter: 520ms;
    --ease-out: cubic-bezier(.22, 1, .36, 1);
}

* {
    box-sizing: border-box;
}

body {
    background: var(--paper);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 1.0625rem;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

/* 行书 — 页面主标题 */
.page-title,
.hero-title,
h1 {
    font-family: var(--font-xing);
    font-weight: 400;
    letter-spacing: 0.05em;
}

/* 楷体 — 章节与小标题 */
.section-title,
.subsection-title,
.join-banner h2,
.login-modal-box h2,
.event-card h3,
h2,
h3,
h4 {
    font-family: var(--font-kai);
    font-weight: 400;
    letter-spacing: 0.02em;
}

.font-display {
    font-family: var(--font-xing);
    font-weight: 400;
}

.font-kai {
    font-family: var(--font-kai);
    font-weight: 400;
}

/* ── Page layout ── */

.page-header {
    max-width: 64rem;
    margin: 0 auto 3.5rem;
    padding: 0 1rem;
    border-left: 3px solid var(--maroon);
    padding-left: 1.25rem;
}

.page-eyebrow {
    font-family: "Source Sans 3", "Noto Sans SC", sans-serif;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--ink-muted);
    margin-bottom: 0.5rem;
}

.page-title {
    font-size: clamp(1.875rem, 4.5vw, 3.25rem);
    line-height: 1.15;
    color: var(--maroon);
    margin-bottom: 0.5rem;
}

.page-lead {
    font-size: 1.125rem;
    color: var(--ink-muted);
    max-width: 36rem;
}

.page-intro {
    margin-top: 1.5rem;
    color: var(--ink);
    max-width: 48rem;
    text-align: left;
}

/* ── Sections ── */

.section-title {
    font-size: 1.75rem;
    color: var(--ink);
    margin-bottom: 1.25rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--line);
    position: relative;
}

.section-title::before {
    content: "";
    position: absolute;
    left: 0;
    bottom: -1px;
    width: 2.5rem;
    height: 2px;
    background: var(--gold);
}

.section-title.plain {
    border-bottom: none;
    padding-bottom: 0;
}

.section-title.plain::before {
    display: none;
}

.subsection-title {
    font-size: 1.2rem;
    color: var(--maroon);
    margin-bottom: 0.75rem;
}

/* ── Panels & cards ── */

.panel {
    background: var(--white);
    border: 1px solid var(--line);
    padding: 1.75rem 2rem;
}

.panel-muted {
    background: var(--paper-dark);
    border: 1px solid var(--line);
    padding: 1rem 1.25rem;
}

.member-pool-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem 1.75rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.member-pool-list li {
    font-size: 1.05rem;
    color: var(--ink);
    white-space: nowrap;
}

/* ── Hero ── */

.hero {
    position: relative;
    min-height: 85vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 6rem 1rem 4rem;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(26, 22, 20, 0.72) 0%,
        rgba(138, 16, 11, 0.55) 100%
    );
}

.hero-content {
    position: relative;
    max-width: 60rem;
}

.hero-title {
    font-size: clamp(2.0rem, 5.5vw, 3.75rem);
    line-height: 1.12;
    color: #fff;
    margin-bottom: 1.5rem;
}

.hero-text {
    color: rgba(255, 252, 247, 0.88);
    font-size: 1.1rem;
    line-height: 1.75;
}

.hero-link {
    display: inline-block;
    margin-top: 2.5rem;
    font-family: "Source Sans 3", "Noto Sans SC", sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--gold);
    border-bottom: 1px solid var(--gold);
    padding-bottom: 2px;
    transition: opacity 0.2s;
}

.hero-link:hover {
    opacity: 0.75;
}

/* ── Navigation ── */

.site-nav {
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 50;
    background: var(--nav-bg);
    border-bottom: 1px solid #5c100d;
}

.site-nav-inner {
    width: 100%;
    max-width: 100%;
    margin: 0;
    padding: 0.7rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    box-sizing: border-box;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    text-decoration: none;
    color: inherit;
    flex-shrink: 0;
}

.nav-brand-mark {
    width: 2.25rem;
    height: 2.25rem;
    object-fit: contain;
}

.nav-brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.nav-brand-title {
    font-family: var(--font-xing);
    font-size: 1.55rem;
    color: var(--nav-text);
    letter-spacing: 0.08em;
}

.nav-brand-sub {
    font-family: var(--font-kai);
    font-size: 0.78rem;
    color: var(--nav-text-dim);
    letter-spacing: 0.04em;
    max-width: 13rem;
    margin-top: 0.1rem;
}

.nav-links {
    display: none;
    flex: 1;
    min-width: 0;
    align-items: center;
    gap: 0.3rem 0.5rem;
    flex-wrap: nowrap;
    justify-content: flex-end;
}

/* The loader measures natural single-row width before choosing a layout. */
.site-nav[data-nav-measuring] {
    overflow: hidden;
}

.site-nav[data-nav-measuring] .nav-links {
    flex: none;
    width: max-content;
    justify-content: flex-start;
}

.nav-links > * {
    flex-shrink: 0;
}

/* Existing page typography; navigation mode is independent of this query. */
@media (max-width: 1099.98px) {
    body {
        font-size: 1rem;
        line-height: 1.65;
        overflow-wrap: anywhere;
    }
}

:where(.site-nav[data-nav-layout="expanded"]) .nav-links {
    display: flex;
}

.nav-link {
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--nav-text-dim);
    text-decoration: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.35rem 0;
    border-bottom: 1px solid transparent;
    transition: color 0.15s, border-color 0.15s;
    white-space: nowrap;
}

.nav-link:hover,
.nav-item:hover > .nav-link {
    color: var(--nav-text);
    border-bottom-color: rgba(219, 187, 91, 0.65);
}

.nav-link-auth {
    color: var(--nav-text);
    font-family: var(--font-body);
    font-size: 0.95rem;
    letter-spacing: 0.04em;
}

.nav-divider {
    display: inline-block;
    width: 1px;
    height: 1rem;
    background: var(--nav-line);
    margin: 0 0.15rem;
}

.nav-item {
    position: relative;
}

.nav-menu {
    position: absolute;
    top: calc(100% + 0.35rem);
    left: 0;
    min-width: 9.5rem;
    background: var(--paper);
    border: 1px solid #c9bdb0;
    padding: 0.35rem 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: opacity 0.15s, transform 0.15s, visibility 0.15s;
    z-index: 60;
}

.nav-menu-wide {
    min-width: 11rem;
}

.nav-menu-right {
    left: auto;
    right: 0;
}

:where(.site-nav[data-nav-layout="expanded"]) .nav-item.is-hovered > .nav-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-menu a {
    display: block;
    padding: 0.45rem 1rem;
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--ink-muted);
    text-decoration: none;
    transition: color 0.12s, background 0.12s;
}

.nav-menu a:hover {
    color: var(--maroon);
    background: var(--paper);
}

/* ── Buttons ── */

.btn {
    display: inline-block;
    font-family: "Source Sans 3", "Noto Sans SC", sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.75rem 1.75rem;
    border: 1px solid transparent;
    transition: background 0.2s, color 0.2s;
    border-radius: 0;
}

.btn-gold {
    background: var(--gold);
    color: var(--maroon);
    border-color: var(--gold);
}

.btn-gold:hover {
    background: #c9a84e;
}

.btn-outline-light {
    background: transparent;
    color: var(--gold);
    border-color: var(--gold);
}

.btn-outline-light:hover {
    background: var(--gold);
    color: var(--maroon);
}

/* ── Join banner ── */

.join-banner {
    background: var(--maroon);
    color: #fff;
    padding: 2.5rem 2rem;
    text-align: center;
    border: 1px solid #6e0c08;
}

.join-banner h2 {
    color: #fff;
    font-size: 2rem;
    margin-bottom: 1rem;
}

.join-banner-photo {
    background-size: cover;
    background-position: center;
    border: 1px solid #6e0c08;
}

/* ── Footer ── */

.site-footer {
    background: var(--darkBg, #1a1614);
    color: #a8a29e;
    padding: 2rem 1rem;
    text-align: center;
    font-size: 0.85rem;
    letter-spacing: 0.04em;
    border-top: 2px solid var(--maroon);
}

.content-review-note {
    max-width: 54rem;
    margin: 1rem 0 0;
    padding: 0.7rem 0.9rem;
    color: var(--ink-muted);
    background: rgba(219, 187, 91, 0.1);
    border-left: 3px solid var(--gold);
    font-size: 0.9rem;
    line-height: 1.65;
}

.content-review-note time {
    color: var(--ink);
    font-weight: 700;
}

/* ── Forms & modal ── */

.form-panel {
    background: var(--white);
    border: 1px solid var(--line);
    padding: 2rem 2.5rem;
}

.form-input {
    width: 100%;
    padding: 0.65rem 0.85rem;
    border: 1px solid var(--line);
    border-radius: 0;
    background: var(--white);
    font-family: "Source Sans 3", "Noto Sans SC", sans-serif;
    font-size: 0.95rem;
}

.form-input:focus {
    outline: none;
    border-color: var(--maroon);
}

.form-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--ink-muted);
    margin-bottom: 0.35rem;
}

#login-modal {
    padding: 1rem;
    overflow-y: auto;
}

.login-modal-box {
    max-height: calc(100dvh - 2rem);
    overflow-y: auto;
    min-height: 0;
    background: var(--white);
    border: 1px solid var(--line);
    box-shadow: 8px 8px 0 rgba(28, 25, 23, 0.1);
    border-radius: 0;
}

.auth-mode-tabs {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0;
    margin-bottom: 1.25rem;
    border: 1px solid var(--line);
    background: var(--paper);
}

.auth-mode-tab {
    min-height: 46px;
    padding: 0.65rem 0.8rem;
    border: 0;
    background: transparent;
    color: var(--ink-muted);
    font: 700 0.9rem/1.2 "Source Sans 3", "Noto Sans SC", sans-serif;
    cursor: pointer;
}

.auth-mode-tab + .auth-mode-tab {
    border-left: 1px solid var(--line);
}

.auth-mode-tab.is-active {
    background: var(--maroon);
    color: #fff;
}

.auth-register-panel[hidden],
[data-auth-mode-panel][hidden] {
    display: none !important;
}

.auth-register-note {
    padding: 0.75rem 0.85rem;
    border-left: 4px solid var(--gold);
    background: #fff8df;
    color: var(--ink-muted);
    font-size: 0.82rem;
    line-height: 1.5;
}

.auth-mode-prompt {
    margin: 0;
    text-align: center;
    color: var(--ink-muted);
    font-size: 0.88rem;
}

.auth-mode-prompt button {
    min-height: 44px;
    padding-inline: 0.2rem;
    border: 0;
    background: transparent;
    color: var(--maroon);
    font-weight: 800;
    text-decoration: underline;
    text-underline-offset: 3px;
    cursor: pointer;
}

.skip-link {
    position: fixed;
    top: 0.5rem;
    left: 0.5rem;
    z-index: 200;
    transform: translateY(-180%);
    padding: 0.75rem 1rem;
    border: 2px solid #fff;
    background: #8a100b;
    color: #fff;
    font-weight: 800;
    text-decoration: none;
    transition: transform 0.15s ease;
}

.skip-link:focus {
    transform: translateY(0);
}

.auth-status {
    margin: -0.5rem 0 1rem;
    padding: 0.75rem 0.9rem;
    border-left: 4px solid #a31612;
    background: #fff2f0;
    color: #76100d;
    font-size: 0.92rem;
    line-height: 1.45;
    font-weight: 700;
}

.auth-status.is-success {
    border-left-color: #1f6b4f;
    background: #edf8f3;
    color: #174d3b;
}

.auth-status.is-info {
    border-left-color: var(--gold);
    background: #fff8df;
    color: #5c4716;
}

.btn-primary:disabled,
.btn-secondary:disabled,
#auth-resend-verification:disabled {
    cursor: wait;
    opacity: 0.68;
}

body.login-modal-open {
    overflow: hidden;
}

:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
outline: 3px solid #fff;
outline-offset: 2px;
box-shadow: 0 0 0 5px #8a100b;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto !important;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.login-modal-box h2 {
    font-size: 2rem;
    color: var(--maroon);
}

.btn-primary {
    width: 100%;
    background: var(--maroon);
    color: #fff;
    font-weight: 600;
    padding: 0.75rem;
    border: 1px solid var(--maroon);
    border-radius: 0;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    font-size: 0.8rem;
    transition: background 0.2s;
}

.btn-primary:hover {
    background: #6e0c08;
}

.btn-secondary {
    width: 100%;
    background: var(--white);
    color: var(--ink);
    font-weight: 600;
    padding: 0.75rem;
    border: 1px solid var(--line);
    border-radius: 0;
    transition: border-color 0.2s;
}

.btn-secondary:hover {
    border-color: var(--maroon);
}

.btn-outline-maroon {
    width: 100%;
    background: var(--white);
    color: var(--maroon);
    font-weight: 600;
    padding: 0.75rem;
    border: 2px solid var(--maroon);
    border-radius: 0;
    transition: background 0.2s, color 0.2s;
}

.btn-outline-maroon:hover {
    background: var(--maroon);
    color: #fff;
}

/* ── Misc ── */

.placeholder-box {
    background: var(--paper-dark);
    border: 1px dashed var(--line);
    padding: 2.5rem;
    text-align: center;
    color: var(--ink-muted);
}

.avatar-placeholder {
    width: 5.5rem;
    height: 5.5rem;
    background: var(--paper-dark);
    border: 1px solid var(--line);
    margin: 0 auto 1rem;
}

.sponsor-tile {
    aspect-ratio: 1;
    background: var(--white);
    border: 1px solid var(--line);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    color: var(--ink-muted);
    font-size: 0.9rem;
}

/* ── Content images ── */

.page-banner {
    max-width: 64rem;
    margin: 0 auto 2.5rem;
    padding: 0 1rem;
}

.page-banner img {
    width: 100%;
    max-height: 20rem;
    object-fit: cover;
    display: block;
    border: 1px solid var(--line);
}

.page-banner figcaption,
.content-figure figcaption {
    font-size: 0.75rem;
    color: var(--ink-muted);
    margin-top: 0.45rem;
    letter-spacing: 0.02em;
}

.content-split {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 1.5rem;
    align-items: start;
}

.content-split.reverse {
    grid-template-columns: 0.95fr 1.05fr;
}

.content-figure img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    display: block;
    border: 1px solid var(--line);
}

.image-strip {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.image-strip img {
    width: 100%;
    aspect-ratio: 3 / 2;
    object-fit: cover;
    border: 1px solid var(--line);
}

.image-strip figcaption {
    grid-column: 1 / -1;
    font-size: 0.75rem;
    color: var(--ink-muted);
    margin-top: 0.25rem;
}

.inline-figure {
    margin: 1.25rem 0;
}

.inline-figure img {
    width: 100%;
    max-height: 16rem;
    object-fit: cover;
    border: 1px solid var(--line);
}

.inline-figure figcaption {
    font-size: 0.75rem;
    color: var(--ink-muted);
    margin-top: 0.45rem;
}

.event-gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.event-card img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    display: block;
    border: 1px solid var(--line);
}

.event-card figcaption {
    padding: 0.85rem 0 0;
}

.event-card h3 {
    font-size: 1.25rem;
    color: var(--maroon);
    margin-bottom: 0.25rem;
}

.event-card p {
    font-size: 0.9rem;
    color: var(--ink-muted);
    font-family: "Source Sans 3", "Noto Sans SC", sans-serif;
}

@media (max-width: 768px) {
    .content-split,
    .content-split.reverse {
        grid-template-columns: 1fr;
    }

    .image-strip {
        grid-template-columns: 1fr;
    }

    .page-banner img {
        max-height: 14rem;
    }

    .event-gallery {
        grid-template-columns: 1fr;
    }
}

/* ── i18n Toggling ── */
html[lang="zh"] .lang-en {
    display: none !important;
}
html[lang="en"] .lang-zh {
    display: none !important;
}

/* ── Responsive navigation and mobile layout ── */
html,
body {
    max-width: 100%;
    overflow-x: hidden;
}

img,
svg,
video {
    max-width: 100%;
}

.mobile-nav-search,
.mobile-nav-toggle {
    display: inline-flex;
    width: 2.75rem;
    height: 2.75rem;
    flex: 0 0 2.75rem;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 0.3rem;
    padding: 0;
    color: var(--nav-text);
    background: transparent;
    border: 1px solid var(--nav-line);
    cursor: pointer;
}

.mobile-nav-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: auto;
}

.mobile-nav-search {
    font-size: 1.4rem;
    line-height: 1;
}

.mobile-nav-search:hover,
.mobile-nav-search:focus-visible,
.mobile-nav-toggle:hover,
.mobile-nav-toggle:focus-visible {
    color: var(--nav-text);
    border-color: rgba(219, 187, 91, 0.85);
    outline: 3px solid rgba(219, 187, 91, 0.28);
    outline-offset: 2px;
}

.mobile-nav-toggle-bar {
    display: block;
    width: 1.25rem;
    height: 2px;
    background: currentColor;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.mobile-nav-toggle[aria-expanded="true"] .mobile-nav-toggle-bar:nth-child(1) {
    transform: translateY(0.44rem) rotate(45deg);
}

.mobile-nav-toggle[aria-expanded="true"] .mobile-nav-toggle-bar:nth-child(2) {
    opacity: 0;
}

.mobile-nav-toggle[aria-expanded="true"] .mobile-nav-toggle-bar:nth-child(3) {
    transform: translateY(-0.44rem) rotate(-45deg);
}

:where(.site-nav[data-nav-layout="expanded"]) .mobile-nav-actions {
    display: none;
}

body.mobile-nav-open {
        overflow: hidden;
    }

:where(.site-nav:not([data-nav-layout="expanded"])) .site-nav-inner {
    min-height: 4rem;
    padding: 0.55rem 0.9rem;
    gap: 0.75rem;
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-brand {
    min-width: 0;
    min-height: 2.75rem;
    gap: 0.55rem;
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-brand-mark {
    width: 2.1rem;
    height: 2.1rem;
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-brand-title {
    font-size: 1.4rem;
    line-height: 1;
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-brand-sub {
    max-width: min(11rem, 42vw);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.68rem;
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: stretch;
    gap: 0;
    max-height: calc(100dvh - var(--site-header-height, 4rem));
    overflow-y: auto;
    padding: 0.5rem 1rem 1rem;
    background: var(--nav-bg);
    border-top: 1px solid var(--nav-line);
    border-bottom: 1px solid #5c100d;
    box-shadow: 0 0.75rem 1.5rem rgba(26, 22, 20, 0.28);
    -webkit-overflow-scrolling: touch;
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-links.is-open {
    display: flex;
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-item,
:where(.site-nav:not([data-nav-layout="expanded"])) .nav-link {
    width: 100%;
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-link {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    min-height: 2.85rem;
    padding: 0.65rem 0.25rem;
    font-size: 1rem;
    white-space: normal;
    overflow-wrap: anywhere;
    border-bottom: 1px solid var(--nav-line);
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-link:hover,
:where(.site-nav:not([data-nav-layout="expanded"])) .nav-item:hover > .nav-link {
    border-bottom-color: var(--nav-line);
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-link-auth,
:where(.site-nav:not([data-nav-layout="expanded"])) .lang-toggle-btn {
    color: var(--nav-text);
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-menu,
:where(.site-nav:not([data-nav-layout="expanded"])) .nav-divider {
    display: none !important;
}

:where(.site-nav:not([data-nav-layout="expanded"])) .lang-toggle-btn,
:where(.site-nav:not([data-nav-layout="expanded"])) .nav-link-auth {
    justify-content: center;
    padding-inline: 0.75rem;
}

@media (max-width: 767.98px) {
    .page-header {
        margin-bottom: 2rem;
        padding-right: 1rem;
    }

    .page-title {
        font-size: clamp(1.9rem, 10vw, 2.6rem);
    }

    .page-lead,
    .hero-text {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .panel,
    .form-panel {
        padding: 1.25rem;
    }

    .panel-muted {
        padding: 0.9rem 1rem;
    }

    .hero {
        min-height: 72svh;
        padding: 6rem 1rem 3rem;
    }

    .hero-content {
        width: 100%;
    }

    .hero-title {
        font-size: clamp(2rem, 11vw, 3rem);
        margin-bottom: 1rem;
    }

    .hero-link {
        margin-top: 1.75rem;
    }

    .join-banner {
        padding: 2rem 1rem;
    }

    .join-banner h2,
    .login-modal-box h2 {
        font-size: 1.65rem;
    }

    #login-modal {
        align-items: flex-start;
        overflow-y: auto;
        padding: 1rem;
    }

    .login-modal-box {
        width: 100%;
        max-width: 28rem;
        max-height: calc(100dvh - 2rem);
        margin: 0;
        padding: 1.5rem;
        overflow-y: auto;
        box-shadow: 4px 4px 0 rgba(28, 25, 23, 0.1);
    }

    .form-input,
    input,
    select,
    textarea {
        min-width: 0;
        max-width: 100%;
        font-size: 16px;
    }

    .btn,
    .btn-primary,
    .btn-secondary,
    .btn-outline-maroon {
        min-height: 2.75rem;
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .content-split,
    .content-split.reverse,
    .image-strip,
    .event-gallery {
        grid-template-columns: minmax(0, 1fr);
    }

    .content-split,
    .event-gallery {
        gap: 1.25rem;
    }

    .content-figure,
    .inline-figure,
    .page-banner {
        max-width: 100%;
        overflow: hidden;
    }

    .page-banner img,
    .content-figure img,
    .inline-figure img,
    .image-strip img {
        height: auto;
        max-height: 14rem;
    }

    .member-pool-list {
        display: grid;
        grid-template-columns: minmax(0, 1fr);
        gap: 0.5rem;
    }

    .member-pool-list li {
        white-space: normal;
    }

    .grid,
    .grid > *,
    .flex,
    .flex > * {
        min-width: 0;
    }

    table {
        display: block;
        width: 100%;
        max-width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .placeholder-box {
        padding: 1.5rem 1rem;
    }
}

@media (max-width: 380px) {
    .nav-brand-sub {
        display: none;
    }

    .page-title {
        font-size: 1.85rem;
    }
}

/* Mobile touch targets: keep interactive controls comfortable and prevent double-tap zoom. */
@media (max-width: 767.98px) {
    button,
    [role="button"],
    select,
    input[type="button"],
    input[type="submit"] {
        min-height: 2.75rem;
        touch-action: manipulation;
        -webkit-tap-highlight-color: rgba(138, 16, 11, 0.14);
    }

    button:not(.tutorial-dot),
    [role="button"] {
        min-width: 2.75rem;
    }

    .nav-link,
    .btn,
    .btn-primary,
    .btn-secondary,
    .btn-outline-maroon {
        touch-action: manipulation;
        -webkit-tap-highlight-color: rgba(255, 255, 255, 0.18);
    }

    .hero-link {
        display: inline-flex;
        min-height: 2.75rem;
        align-items: center;
        justify-content: center;
        padding-block: 0.55rem;
    }

    .lang-toggle-btn,
    .nav-link-auth {
        justify-content: center;
        padding-inline: 0.75rem;
    }
}

/* ── Practical links: apps, maps, dining and delivery ── */
.resource-hub {
    padding: 1.5rem;
    border: 1px solid var(--line);
    border-left: 3px solid var(--gold);
    background: rgba(255, 252, 247, 0.72);
}

.resource-hub-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1.25rem;
    margin-bottom: 1.25rem;
}

.resource-hub-heading h3 {
    margin: 0;
    color: var(--maroon);
    font-size: clamp(1.25rem, 2.6vw, 1.65rem);
    line-height: 1.25;
}

.resource-hub-heading .page-eyebrow {
    margin-bottom: 0.25rem;
}

.resource-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.resource-grid-compact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.resource-card {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1.15rem;
    border: 1px solid var(--line);
    background: var(--white);
    box-shadow: 3px 3px 0 rgba(138, 16, 11, 0.07);
}

.resource-card-head {
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
    min-width: 0;
}

.resource-card-head > div {
    min-width: 0;
}

.resource-icon {
    flex: 0 0 2.75rem;
    width: 2.75rem;
    height: 2.75rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--paper-dark);
    font-size: 1.25rem;
    line-height: 1;
}

.resource-card h3 {
    margin: 0 0 0.25rem;
    color: var(--maroon);
    font-size: 1.15rem;
    line-height: 1.25;
    overflow-wrap: anywhere;
}

.resource-card p,
.resource-note,
.resource-address {
    color: var(--ink-muted);
    font-family: var(--font-body);
    font-size: 0.94rem;
    line-height: 1.55;
}

.resource-card p,
.resource-address {
    margin: 0;
}

.resource-note {
    max-width: 38rem;
    margin: 0;
}

.resource-address {
    font-style: normal;
}

.resource-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
    gap: 0.55rem;
    margin-top: auto;
}

.resource-link {
    min-height: 2.75rem;
    min-width: 2.75rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 0.85rem;
    border: 1px solid var(--maroon);
    color: var(--maroon);
    background: transparent;
    font-family: var(--font-body);
    font-size: 0.88rem;
    font-weight: 600;
    line-height: 1.25;
    text-align: center;
    text-decoration: none;
    overflow-wrap: anywhere;
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(138, 16, 11, 0.14);
    transition: background-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.resource-link:hover {
    background: var(--paper-dark);
    transform: translateY(-1px);
}

.resource-link:focus-visible,
.inline-resource-link:focus-visible {
    outline: 3px solid var(--gold);
    outline-offset: 2px;
}

.resource-link-primary {
    color: var(--white);
    background: var(--maroon);
}

.resource-link-primary:hover {
    color: var(--white);
    background: #6f0d09;
}

.resource-link-urgent {
    border-color: #9b1c1c;
    color: #9b1c1c;
}

.inline-resource-link {
    color: var(--maroon);
    font-weight: 600;
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 0.16em;
}

.inline-resource-link:hover {
    color: #5f0b08;
    text-decoration-thickness: 2px;
}

@media (max-width: 640px) {
    .resource-hub {
        padding: 1.05rem;
    }

    .resource-hub-heading {
        align-items: flex-start;
        flex-direction: column;
        gap: 0.5rem;
    }

    .resource-grid,
    .resource-grid-compact {
        grid-template-columns: minmax(0, 1fr);
    }

    .resource-card {
        padding: 1rem;
        gap: 0.85rem;
    }

    .resource-actions .resource-link {
        flex: 1 1 100%;
        width: 100%;
        padding-block: 0.7rem;
    }
}

/* Boston food guide: category navigation and mobile-friendly grouping */
.resource-category-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin: 0 0 2rem;
}

.resource-category-chip {
    min-height: 2.75rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.62rem 0.9rem;
    border: 1px solid var(--line);
    color: var(--maroon);
    background: var(--white);
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 700;
    line-height: 1.2;
    text-decoration: none;
    white-space: nowrap;
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(138, 16, 11, 0.14);
}

.resource-category-chip:hover {
    border-color: var(--maroon);
    background: var(--paper-dark);
}

.resource-category-chip:focus-visible {
    outline: 3px solid var(--gold);
    outline-offset: 2px;
}

.resource-category {
    scroll-margin-top: calc(var(--site-header-height, 4rem) + 1rem);
}

.resource-category + .resource-category {
    margin-top: 2.5rem;
}

.resource-category-title {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    margin: 0 0 1rem;
    padding-bottom: 0.65rem;
    border-bottom: 1px solid var(--line);
    color: var(--maroon);
    font-size: 1.28rem;
    line-height: 1.25;
}

.resource-category-icon {
    flex: 0 0 auto;
    font-size: 1.2rem;
}

@media (max-width: 640px) {
    .resource-category-nav {
        position: sticky;
        top: calc(var(--site-header-height, 4rem) + 0.65rem);
        z-index: 15;
        flex-wrap: nowrap;
        overflow-x: auto;
        margin: 0 -1.05rem 1.75rem;
        padding: 0.72rem 1.05rem;
        border-top: 1px solid var(--line);
        border-bottom: 1px solid var(--line);
        background: rgba(255, 252, 247, 0.97);
        scrollbar-width: thin;
        overscroll-behavior-inline: contain;
        -webkit-overflow-scrolling: touch;
    }

    .resource-category-chip {
        flex: 0 0 auto;
        min-height: 2.75rem;
    }

    .resource-category {
        scroll-margin-top: calc(var(--site-header-height, 4rem) + var(--site-section-nav-height, 0px) + 1rem);
    }

    .resource-category + .resource-category {
        margin-top: 2rem;
    }

    .resource-category-title {
        margin-bottom: 0.85rem;
        font-size: 1.12rem;
    }
}

/* Boston neighborhood picker: native, accessible, collapsed by default */
.neighborhood-helper {
    margin: -0.25rem 0 1rem;
    color: var(--ink-muted);
    font-size: 0.94rem;
    line-height: 1.5;
}

.neighborhood-list {
    display: grid;
    gap: 0.85rem;
}

.neighborhood-disclosure {
    border: 1px solid var(--line);
    background: var(--white);
    box-shadow: 3px 3px 0 rgba(138, 16, 11, 0.07);
}

.neighborhood-summary {
    min-height: 5rem;
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 1rem 1.15rem;
    list-style: none;
    color: var(--ink);
    cursor: pointer;
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(138, 16, 11, 0.14);
}

.neighborhood-summary::-webkit-details-marker {
    display: none;
}

.neighborhood-summary::marker {
    content: "";
}

.neighborhood-summary:hover,
.neighborhood-disclosure[open] > .neighborhood-summary {
    background: var(--paper-dark);
}

.neighborhood-summary:focus-visible {
    outline: 3px solid var(--gold);
    outline-offset: 2px;
}

.neighborhood-summary-copy {
    min-width: 0;
    display: block;
    flex: 1 1 auto;
}

.neighborhood-summary-title,
.neighborhood-summary-description {
    display: block;
}

.neighborhood-summary-title {
    color: var(--maroon);
    font-family: var(--font-kai);
    font-size: 1.2rem;
    line-height: 1.3;
}

.neighborhood-summary-description {
    margin-top: 0.2rem;
    color: var(--ink-muted);
    font-family: var(--font-body);
    font-size: 0.94rem;
    line-height: 1.45;
}

.neighborhood-count {
    flex: 0 0 auto;
    padding: 0.28rem 0.58rem;
    border: 1px solid var(--line);
    color: var(--maroon);
    background: var(--paper);
    font-family: var(--font-body);
    font-size: 0.78rem;
    font-weight: 700;
    line-height: 1.2;
}

.neighborhood-chevron {
    flex: 0 0 auto;
    width: 0.65rem;
    height: 0.65rem;
    margin-inline: 0.25rem;
    border-right: 2px solid var(--maroon);
    border-bottom: 2px solid var(--maroon);
    transform: rotate(45deg);
}

.neighborhood-disclosure[open] .neighborhood-chevron {
    transform: rotate(225deg);
}

.neighborhood-panel {
    padding: 1.15rem;
    border-top: 1px solid var(--line);
    background: rgba(247, 244, 239, 0.55);
}

.neighborhood-actions {
    margin: 0 0 1rem;
}

@media (prefers-reduced-motion: no-preference) {
    .neighborhood-chevron {
        transition: transform 160ms ease;
    }
}

@media (max-width: 640px) {
    .neighborhood-summary {
        min-height: 4.5rem;
        align-items: flex-start;
        gap: 0.7rem;
        padding: 0.9rem;
    }

    .neighborhood-summary-title {
        font-size: 1.08rem;
    }

    .neighborhood-count {
        display: none;
    }

    .neighborhood-chevron {
        margin-top: 0.65rem;
    }

    .neighborhood-panel {
        padding: 0.9rem;
    }
}

/* Academics navigation group: keyboard-accessible on desktop and visible on mobile. */
.nav-item:focus-within .nav-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-link-group {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-item-academics > .nav-link {
    color: var(--nav-text);
    font-weight: 700;
    border-bottom: 0;
    cursor: default;
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-item-academics .nav-menu {
    position: static;
    display: block !important;
    min-width: 0;
    padding: 0 0 0.35rem 0.8rem;
    background: transparent;
    border: 0;
    opacity: 1;
    visibility: visible;
    transform: none;
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-item-academics .nav-menu a {
    min-height: 2.65rem;
    display: flex;
    align-items: center;
    padding: 0.55rem 0.7rem;
    color: var(--nav-text-dim);
    background: rgba(255, 255, 255, 0.04);
    border-bottom: 1px solid var(--nav-line);
    font-size: 0.94rem;
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-item-academics .nav-menu a:hover,
:where(.site-nav:not([data-nav-layout="expanded"])) .nav-item-academics .nav-menu a:focus-visible {
    color: var(--nav-text);
    background: rgba(255, 255, 255, 0.08);
}

/* Unified expandable navigation groups (About, Freshman, Academics, Partners). */
.nav-item-group > .nav-link-group {
    appearance: none;
    background: transparent;
    cursor: pointer;
    font-family: inherit;
}

.nav-caret {
    display: inline-block;
    margin-left: 0.1rem;
    font-size: 0.8em;
    line-height: 1;
    transition: transform 0.18s ease;
}

.nav-item-group.is-hovered > .nav-link-group .nav-caret,
.nav-item-group:focus-within > .nav-link-group .nav-caret,
.nav-item-group.is-open > .nav-link-group .nav-caret,
.nav-submenu-toggle[aria-expanded="true"] .nav-caret {
    transform: rotate(180deg);
}

.nav-item-group.is-open > .nav-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-menu-overview {
    font-weight: 700;
    color: var(--maroon) !important;
    border-bottom: 1px solid var(--line);
    margin-bottom: 0.2rem;
}

.nav-department-heading {
    margin: 0;
    padding: 0.65rem 0.7rem;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--maroon);
}

:where(.site-nav[data-nav-layout="expanded"]) .nav-menu.nav-menu-resources {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: min(540px, calc(100vw - 2rem));
    max-height: calc(100dvh - 7rem);
    overflow-y: auto;
}

:where(.site-nav[data-nav-layout="expanded"]) .nav-department-section + .nav-department-section {
    border-left: 1px solid var(--line);
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-department-heading {
    color: var(--nav-text);
    padding-top: 1rem;
}

.resource-category-note {
    margin: -0.1rem 0 1rem;
    padding: 0.72rem 0.9rem;
    color: var(--ink-muted);
    background: rgba(219, 187, 91, 0.1);
    border-left: 3px solid var(--gold);
    font-size: 0.95rem;
    line-height: 1.65;
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-item-group > .nav-link-group,
:where(.site-nav:not([data-nav-layout="expanded"])) .nav-item-group.nav-item-academics > .nav-link-group {
    width: 100%;
    min-height: 2.75rem;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 0.35rem;
    color: var(--nav-text);
    font-weight: 700;
    border-bottom: 1px solid var(--nav-line);
    cursor: pointer;
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-item-group > .nav-link-group .nav-caret {
    margin-left: auto;
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-item-group > .nav-menu,
:where(.site-nav:not([data-nav-layout="expanded"])) .nav-item-group.nav-item-academics > .nav-menu {
    position: static;
    display: none !important;
    min-width: 0;
    width: 100%;
    padding: 0 0 0.35rem 0.8rem;
    background: transparent;
    border: 0;
    opacity: 0;
    visibility: hidden;
    transform: none;
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-item-group.is-open > .nav-menu,
:where(.site-nav:not([data-nav-layout="expanded"])) .nav-item-group.nav-item-academics.is-open > .nav-menu {
    display: block !important;
    opacity: 1;
    visibility: visible;
    transform: none;
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-item-group > .nav-menu a,
:where(.site-nav:not([data-nav-layout="expanded"])) .nav-item-group.nav-item-academics > .nav-menu a {
    min-height: 2.75rem;
    display: flex;
    align-items: center;
    padding: 0.55rem 0.7rem;
    color: var(--nav-text);
    background: rgba(255, 255, 255, 0.04);
    border-bottom: 1px solid var(--nav-line);
    font-size: 0.94rem;
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-item-group > .nav-menu a:hover,
:where(.site-nav:not([data-nav-layout="expanded"])) .nav-item-group > .nav-menu a:focus-visible,
:where(.site-nav:not([data-nav-layout="expanded"])) .nav-item-group > .nav-menu a:active {
    color: var(--nav-text);
    background: rgba(255, 255, 255, 0.12);
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-item-group > .nav-menu a:focus-visible {
    outline: 2px solid var(--nav-text);
    outline-offset: -3px;
}

:where(.site-nav:not([data-nav-layout="expanded"])) .nav-menu-overview {
    color: var(--nav-text) !important;
    border-top: 0;
}

/* Disclosure buttons open keyboard menus only after explicit activation. */

/* Shared presentation rhythm; spacing grows with the available canvas. */
.page-header {
    margin-bottom: clamp(2.5rem, 5vw, 5rem);
    padding-left: clamp(1.25rem, 2.5vw, 2rem);
}
.page-title { font-size: clamp(2.2rem, 4.5vw, 4rem); text-wrap: balance; }
.page-lead { max-width: 44rem; line-height: 1.8; }
html[lang="en"] :is(.page-title, .home-hero-title, .home-section-heading h2, .home-featured-copy h3, .home-path-card h3) {
    font-family: "Lora", Georgia, serif;
    letter-spacing: -.025em;
}
.content-split, .content-split.reverse { gap: clamp(1.5rem, 4vw, 3.5rem); }
.page-banner { margin-bottom: clamp(2.5rem, 5vw, 5rem); }
.page-banner img { max-height: 30rem; border: 0; }
.content-figure img { border: 0; }

.site-nav {
    transition: background-color 240ms ease, box-shadow 240ms ease;
    view-transition-name: site-navigation;
}
.home-page:not(.mobile-nav-open) .site-nav:not([data-scrolled]) {
    background: rgba(66, 18, 15, .82);
    border-bottom-color: rgba(255, 250, 243, .2);
}
.site-nav[data-scrolled] { box-shadow: 0 4px 24px rgba(28, 25, 23, .12); }
.nav-link[aria-current="page"], .nav-item-group[data-current] > .nav-link {
    color: var(--nav-text);
    border-bottom-color: var(--gold);
}
:where(.site-nav[data-nav-layout="expanded"]) .nav-menu {
    width: max-content;
    max-width: calc(100vw - 2rem);
    box-shadow: 0 14px 40px rgba(28, 25, 23, .14);
    border-top: 2px solid var(--gold);
    transition: opacity var(--motion-fast), transform var(--motion-fast) var(--ease-out), visibility var(--motion-fast);
}
:where(.site-nav[data-nav-layout="expanded"]) .nav-menu a {
    white-space: nowrap;
}
:where(.site-nav[data-nav-layout="expanded"]) .nav-menu a:hover,
:where(.site-nav[data-nav-layout="expanded"]) .nav-menu a[aria-current="page"] {
    background: var(--paper-dark);
    color: var(--maroon);
}
:where(.site-nav:not([data-nav-layout="expanded"])) .nav-menu a[aria-current="page"] {
    background: rgba(255,255,255,.12);
    color: var(--nav-text);
    text-decoration: underline;
    text-underline-offset: .3em;
}

/* Shared masthead component: one hierarchy, layout, and menu surface for every page. */
.site-nav-utility { display: none; }

.site-nav[data-nav-layout="expanded"] {
    --nav-bg: #fff;
    --nav-text: #751711;
    --nav-text-dim: #514c49;
    --nav-line: #ded8d0;
    background: rgba(255,255,255,.94);
    box-shadow: 0 8px 28px rgba(35,25,21,.09);
    backdrop-filter: blur(20px) saturate(135%);
    -webkit-backdrop-filter: blur(20px) saturate(135%);
    border: 0;
    border-bottom: 1px solid transparent;
    transition: background-color 220ms ease, box-shadow 220ms ease, backdrop-filter 220ms ease;
}

.home-page .site-nav[data-nav-layout="expanded"] {
    --nav-bg: transparent;
    --nav-text: #fffaf3;
    --nav-text-dim: rgba(255, 250, 243, .88);
    --nav-line: rgba(255, 250, 243, .35);
    background: transparent;
    box-shadow: none;
    backdrop-filter: blur(0) saturate(100%);
    -webkit-backdrop-filter: blur(0) saturate(100%);
    border: 0;
    border-bottom: 1px solid transparent;
    transition: background-color 220ms ease, box-shadow 220ms ease, backdrop-filter 220ms ease;
}

.home-page:not(.mobile-nav-open) .site-nav[data-nav-layout="expanded"]:not([data-scrolled]) {
    background: transparent;
    border-bottom-color: transparent;
}

.home-page .site-nav[data-nav-layout="expanded"] .site-nav-inner {
    background: transparent;
    transition: none;
}

.home-page .site-nav[data-nav-layout="expanded"][data-scrolled],
.home-page .site-nav[data-nav-layout="expanded"]:has(.nav-item-group.is-hovered, .nav-item-group:focus-within, .nav-item-group.is-open) {
    --nav-bg: #fff;
    --nav-text: #751711;
    --nav-text-dim: #514c49;
    --nav-line: #ded8d0;
    background: rgba(255,255,255,.9);
    box-shadow: 0 8px 28px rgba(35,25,21,.09);
    backdrop-filter: blur(20px) saturate(135%);
    -webkit-backdrop-filter: blur(20px) saturate(135%);
    border-bottom-color: transparent;
}

.site-nav[data-nav-layout="expanded"] .site-nav-utility {
    display: block;
    background: #751711;
    color: #fffaf3;
}

.site-nav-utility-inner {
    width: min(1520px, calc(100% - 3rem));
    min-height: 2.65rem;
    margin-inline: auto;
    display: flex;
    align-items: stretch;
    justify-content: space-between;
    gap: 2rem;
}

:is(.site-nav-utility-primary, .site-nav-utility-secondary) {
    display: flex;
    align-items: stretch;
}

.site-nav-utility a,
.site-nav-utility button {
    min-height: 2.65rem;
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    padding: .25rem .85rem;
    border: 0;
    background: transparent;
    color: inherit;
    font: 650 .72rem/1 var(--font-body);
    letter-spacing: .045em;
    text-decoration: none;
    text-transform: uppercase;
    cursor: pointer;
}

.site-nav-utility-primary :is(a, button):first-child { padding-left: 0; }
.site-nav-utility-secondary :is(a, button):last-child { padding-right: 0; }
.site-nav-utility :is(a, button):hover,
.site-nav-utility :is(a, button):focus-visible { background: rgba(255,255,255,.1); }
.site-nav-utility :is(a, button):focus-visible { outline: 2px solid var(--gold); outline-offset: -3px; }

.site-nav[data-nav-layout="expanded"] .site-nav-inner {
    width: min(1520px, calc(100% - 3rem));
    min-height: 7.5rem;
    margin-inline: auto;
    padding: 1.35rem 0 1.1rem;
    align-items: center;
    gap: clamp(2rem, 5vw, 5rem);
}

.site-nav[data-nav-layout="expanded"] .nav-brand { gap: 1rem; }
.site-nav[data-nav-layout="expanded"] .nav-brand-mark { width: 4.65rem; height: 4.65rem; }
.site-nav[data-nav-layout="expanded"] .nav-brand-title {
    font-family: "Lora", Georgia, serif;
    font-size: 2.15rem;
    line-height: 1;
    letter-spacing: .075em;
}
.site-nav[data-nav-layout="expanded"] .nav-brand-sub {
    margin-top: .35rem;
    max-width: none;
    font-size: .78rem;
    letter-spacing: .08em;
}

.site-nav[data-nav-layout="expanded"] .nav-links {
    align-self: flex-end;
    gap: 0 clamp(.55rem, .9vw, 1.05rem);
}

.site-nav[data-nav-layout="expanded"] :is(.nav-search-button, .nav-divider) { display: none !important; }

.site-nav[data-nav-layout="expanded"] .nav-link {
    min-height: 2.7rem;
    display: inline-flex;
    align-items: center;
    padding: .5rem 0;
    border-bottom: 3px solid transparent;
    color: var(--nav-text-dim);
    font-size: .95rem;
    font-weight: 500;
}

.site-nav[data-nav-layout="expanded"] :is(.nav-link:hover, .nav-item.is-hovered > .nav-link, .nav-link:focus-visible),
.site-nav[data-nav-layout="expanded"] .nav-item-group.is-open > .nav-link {
    color: var(--nav-text);
    border-bottom-color: var(--nav-text);
}

.site-nav[data-nav-layout="expanded"] .nav-item-group.is-open > .nav-link {
    padding-inline: .7rem;
    background: #4c4541;
    color: #fff;
    border-bottom-color: #4c4541;
}

.site-nav[data-nav-layout="expanded"] .nav-caret { font-size: .65em; }

.site-nav[data-nav-layout="expanded"] .nav-menu {
    position: fixed;
    top: var(--site-header-height, 10rem);
    left: 0;
    right: 0;
    width: 100vw;
    max-width: none;
    min-width: 0;
    max-height: calc(100dvh - var(--site-header-height, 10rem));
    overflow-y: auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(12rem, 15rem));
    justify-content: center;
    align-items: start;
    gap: .35rem clamp(1.5rem, 4vw, 4rem);
    padding: 2.25rem max(2rem, calc((100vw - 1120px) / 2)) 2.7rem;
    border: 0;
    border: 0;
    background: rgba(255,255,255,.9);
    box-shadow: inset 0 1px 0 rgba(255,255,255,.76), 0 20px 44px rgba(30,23,20,.12);
    backdrop-filter: blur(20px) saturate(135%);
    -webkit-backdrop-filter: blur(20px) saturate(135%);
    transform: none;
    transition: opacity 180ms ease, visibility 180ms ease;
}

.site-nav[data-nav-layout="expanded"] .nav-item.is-hovered > .nav-menu,
.site-nav[data-nav-layout="expanded"] .nav-item:focus-within > .nav-menu,
.site-nav[data-nav-layout="expanded"] .nav-item.is-open > .nav-menu {
    transform: none;
}

.site-nav[data-nav-layout="expanded"] .nav-menu a {
    min-height: 3.15rem;
    display: flex;
    align-items: center;
    padding: .65rem 0;
    border-bottom: 1px solid #e6e0d9;
    color: #5b5551;
    font-size: .9rem;
    font-weight: 550;
    line-height: 1.35;
    white-space: normal;
}

.site-nav[data-nav-layout="expanded"] .nav-menu a:hover,
.site-nav[data-nav-layout="expanded"] .nav-menu a:focus-visible,
.site-nav[data-nav-layout="expanded"] .nav-menu a[aria-current="page"] {
    background: transparent;
    color: var(--nav-text);
    border-bottom-color: var(--nav-text);
}

.site-nav[data-nav-layout="expanded"] .nav-menu.nav-menu-resources {
    width: 100vw;
    max-height: calc(100dvh - var(--site-header-height, 10rem));
    grid-template-columns: repeat(2, minmax(18rem, 31rem));
    gap: clamp(2rem, 6vw, 6rem);
}

.site-nav[data-nav-layout="expanded"] .nav-department-section {
    min-width: 0;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 1.5rem;
}

.site-nav[data-nav-layout="expanded"] .nav-department-section + .nav-department-section { border-left: 0; }
.site-nav[data-nav-layout="expanded"] .nav-department-heading {
    grid-column: 1 / -1;
    padding: 0 0 .65rem;
    border-bottom: 2px solid var(--nav-text);
    color: var(--nav-text);
    font-size: .78rem;
    letter-spacing: .08em;
    text-transform: uppercase;
}
.cisa-timeline { list-style: none; padding: 0; margin: 2rem 0; border-top: 1px solid var(--line); }
.cisa-timeline li { display: grid; grid-template-columns: minmax(7rem, .3fr) minmax(0, 1fr); gap: clamp(1rem, 3vw, 3rem); padding: 2rem 0; border-bottom: 1px solid var(--line); }
.cisa-timeline time { color: var(--maroon); font-size: .9rem; font-weight: 600; letter-spacing: .05em; }
.cisa-timeline h3 { margin: 0 0 .5rem; font-size: 1.5rem; }
.cisa-timeline p { margin: 0; color: var(--ink-muted); }
@media (max-width: 480px) { .cisa-timeline li { grid-template-columns: 1fr; gap: .6rem; } }

/* Native navigation remains intact; supporting browsers add a short crossfade. */
@media (prefers-reduced-motion: no-preference) {
    @view-transition { navigation: auto; }
    ::view-transition-old(root), ::view-transition-new(root) { animation-duration: 140ms; }
    ::view-transition-old(site-navigation), ::view-transition-new(site-navigation) { animation: none; }
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto !important; }
    .site-nav { transition: none; }
}

:where(.site-nav[data-nav-layout="expanded"]) .nav-item-group:not(.is-open):not(.is-hovered):focus-within > .nav-menu {
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
}

/* All standard pages consume the same fixed masthead component. The measured
   height prevents page content from depending on a hard-coded header size. */
body:not(.home-page) #nav-placeholder + main {
    padding-top: calc(var(--site-header-height, 10rem) + clamp(2rem, 4vw, 4rem)) !important;
}

/* Compact masthead uses the same shared component on every page. */
.site-nav:not([data-nav-layout="expanded"]) {
    --nav-bg: #fff;
    --nav-text: #751711;
    --nav-text-dim: #514c49;
    --nav-line: #ded8d0;
    background: rgba(255, 255, 255, .94);
    border: 0;
    box-shadow: 0 8px 28px rgba(35, 25, 21, .1);
    backdrop-filter: blur(20px) saturate(135%);
    -webkit-backdrop-filter: blur(20px) saturate(135%);
    transition: background-color 240ms ease, box-shadow 240ms ease, backdrop-filter 240ms ease;
}

.home-page:not(.mobile-nav-open) .site-nav:not([data-nav-layout="expanded"]):not([data-scrolled]) {
    --nav-text: #fffaf3;
    --nav-text-dim: rgba(255, 250, 243, .8);
    --nav-line: rgba(255, 255, 255, .42);
    background: transparent;
    box-shadow: none;
    backdrop-filter: blur(0);
    -webkit-backdrop-filter: blur(0);
}

.site-nav:not([data-nav-layout="expanded"]) .site-nav-inner {
    min-height: 4.75rem;
    padding: .68rem clamp(1rem, 4vw, 1.4rem);
    gap: .75rem;
}

.site-nav:not([data-nav-layout="expanded"]) .nav-brand {
    min-width: 0;
    min-height: 3rem;
    gap: .7rem;
}

.site-nav:not([data-nav-layout="expanded"]) .nav-brand-mark {
    width: 2.75rem;
    height: 2.75rem;
}

.site-nav:not([data-nav-layout="expanded"]) .nav-brand-title {
    font-size: 1.55rem;
}

.site-nav:not([data-nav-layout="expanded"]) .nav-brand-sub {
    max-width: min(12rem, 38vw);
    font-size: .7rem;
}

.site-nav:not([data-nav-layout="expanded"]) :is(.mobile-nav-search, .mobile-nav-toggle) {
    width: 3rem;
    height: 3rem;
    flex-basis: 3rem;
    color: var(--nav-text);
    background: rgba(255, 255, 255, .13);
    border-color: var(--nav-line);
    border-radius: .9rem;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .22);
    transition: color 180ms ease, background-color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.site-nav:not([data-nav-layout="expanded"]) :is(.mobile-nav-search, .mobile-nav-toggle):active {
    transform: scale(.96);
}

.site-nav:not([data-nav-layout="expanded"]) .nav-links {
    display: flex;
    top: calc(100% + .55rem);
    left: clamp(.7rem, 3vw, 1rem);
    right: clamp(.7rem, 3vw, 1rem);
    max-height: calc(100dvh - var(--site-header-height, 4.75rem) - 1.25rem);
    padding: .55rem 1rem 1rem;
    color: #514c49;
    background: #fff;
    border: 1px solid rgba(117, 23, 17, .1);
    border-radius: 1rem;
    box-shadow: 0 22px 60px rgba(28, 20, 17, .22);
    backdrop-filter: blur(24px) saturate(140%);
    -webkit-backdrop-filter: blur(24px) saturate(140%);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-.6rem) scale(.985);
    transform-origin: top center;
    transition: none;
}

.site-nav:not([data-nav-layout="expanded"]) .nav-links[data-user-activated] {
    transition: opacity 180ms ease, transform 220ms ease, visibility 220ms ease;
}

.site-nav:not([data-nav-layout="expanded"]) .nav-links.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0) scale(1);
}

.site-nav:not([data-nav-layout="expanded"]) :is(.nav-link, .nav-link-auth, .lang-toggle-btn),
.site-nav:not([data-nav-layout="expanded"]) .nav-item-group > .nav-link-group,
.site-nav:not([data-nav-layout="expanded"]) .nav-item-group.nav-item-academics > .nav-link-group {
    color: #514c49;
    border-bottom-color: #e6e0d9;
}

.site-nav:not([data-nav-layout="expanded"]) :is(.nav-link:hover, .nav-link:focus-visible),
.site-nav:not([data-nav-layout="expanded"]) .nav-item:hover > .nav-link {
    color: #751711;
    background: #f5f1eb;
}

.site-nav:not([data-nav-layout="expanded"]) .nav-item-group > .nav-menu a,
.site-nav:not([data-nav-layout="expanded"]) .nav-item-group.nav-item-academics > .nav-menu a {
    color: #514c49;
    background: transparent;
    border-bottom-color: #e6e0d9;
}

.site-nav:not([data-nav-layout="expanded"]) .nav-item-group > .nav-menu a:hover,
.site-nav:not([data-nav-layout="expanded"]) .nav-item-group > .nav-menu a:focus-visible,
.site-nav:not([data-nav-layout="expanded"]) .nav-item-group > .nav-menu a:active,
.site-nav:not([data-nav-layout="expanded"]) .nav-menu a[aria-current="page"] {
    color: #751711;
    background: #f5f1eb;
}

@media (max-width: 420px) {
    .site-nav:not([data-nav-layout="expanded"]) .nav-brand-sub { display: none; }
}