/* Shared navigation and original learning/tool directory, independent of the IME. */
.site-primary-nav { display: flex; align-items: center; justify-content: center; gap: 3px; margin-inline: auto; font-size: 13px; direction: ltr; }
.site-primary-nav a { padding: 9px 13px; border-radius: 8px; color: var(--muted); font-weight: 550; white-space: nowrap; }
.site-primary-nav a:hover { color: var(--ink); background: var(--canvas); }
.site-primary-nav a[aria-current] { background: var(--accent-soft); color: var(--accent-readable, #b10225); }
.site-header .header-inner { gap: 20px; }
.resource-shell { padding-bottom: 20px; }
.resource-breadcrumb { display: flex; flex-wrap: wrap; gap: 9px; align-items: center; padding-top: 24px; color: var(--muted); font-size: 12px; }
.resource-breadcrumb a:hover { color: var(--ink); text-decoration: underline; }
.resource-breadcrumb [aria-current] { color: var(--ink); }
.resource-hero { display: flex; justify-content: space-between; align-items: center; gap: 35px; padding: 34px 0 30px; }
.resource-hero > div { max-width: 780px; }
.resource-eyebrow { display: block; color: var(--muted); font-size: 11px; font-weight: 600; letter-spacing: .65px; }
.resource-hero h1 { font-size: clamp(30px, 3.7vw, 46px); line-height: 1.15; letter-spacing: -1.2px; margin: 10px 0 14px; }
.resource-hero p { max-width: 700px; margin: 0; color: var(--muted); font-size: 17px; line-height: 1.6; }
.resource-hero-mark { display: grid; flex: 0 0 96px; width: 96px; height: 96px; place-items: center; color: var(--accent-readable, #b10225); background: var(--accent-soft); border-radius: 26px 26px 10px 26px; font-size: 52px; font-family: Arial, sans-serif; }
.resource-feature { display: grid; grid-template-columns: 1.3fr 1fr; gap: 32px; align-items: center; border: 1px solid var(--line); border-radius: 22px; padding: 34px 38px; background: var(--surface); }
.resource-feature h2 { max-width: 460px; margin: 10px 0; font-size: 30px; line-height: 1.25; letter-spacing: -.7px; }
.resource-feature p { max-width: 520px; margin: 0 0 22px; color: var(--muted); font-size: 14px; }
.resource-syllable-art { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; min-height: 220px; border-radius: 16px; background: linear-gradient(140deg, var(--canvas), var(--accent-soft)); color: var(--ink); }
.resource-syllable-art > span { font-size: 26px; color: var(--accent-readable, #b10225); }
.resource-syllable-art b { display: inline-block; margin: 0 10px; color: var(--muted); font-size: 18px; font-weight: 400; }
.resource-syllable-art strong { font-family: Arial, sans-serif; font-size: 64px; font-weight: 400; line-height: 1.35; }
.resource-syllable-art small { color: var(--muted); font-size: 14px; }
.resource-section, .resource-next { margin-top: 38px; }
.resource-section-heading { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 17px; }
.resource-section-heading h2 { margin: 0; font-size: 23px; line-height: 1.3; letter-spacing: -.4px; }
.resource-section-heading > a, .resource-section-heading > span { font-size: 13px; color: var(--muted); }
.resource-section-heading a:hover { color: var(--ink); text-decoration: underline; }
.resource-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.resource-card { display: flex; align-items: flex-start; gap: 14px; min-width: 0; padding: 22px 18px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); transition: border-color .15s, box-shadow .15s; }
.resource-card:hover { border-color: color-mix(in srgb, var(--accent) 32%, var(--line)); box-shadow: 0 8px 20px #17243909; }
.resource-card-mark { display: grid; flex: 0 0 42px; width: 42px; height: 46px; place-items: center; border-radius: 10px; background: var(--canvas); color: var(--accent-readable, #b10225); font: 27px Arial, sans-serif; }
.resource-card-body { flex: 1; min-width: 0; }
.resource-card-body strong { display: block; margin: 1px 0 8px; color: var(--ink); font-size: 16px; font-weight: 650; line-height: 1.35; }
.resource-card-body > span { display: block; color: var(--muted); font-size: 13px; line-height: 1.6; }
.resource-card-arrow { color: var(--muted); font-size: 18px; line-height: 1.4; }
.resource-note { margin-top: 28px; padding: 18px 22px; border-radius: 12px; background: var(--canvas); color: var(--muted); font-size: 13px; line-height: 1.7; }
.resource-note strong { color: var(--ink); font-weight: 600; }
.resource-guide { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: 46px; margin: 40px 0 0; padding-top: 30px; border-top: 1px solid var(--line); }
.resource-guide h2 { margin: 9px 0 14px; font-size: 25px; line-height: 1.25; letter-spacing: -.5px; }
.resource-guide h3 { margin: 0 0 12px; font-size: 17px; line-height: 1.4; }
.resource-guide p, .resource-guide li { margin: 0 0 12px; color: var(--muted); font-size: 14px; line-height: 1.8; }
.resource-guide strong { color: var(--ink); font-weight: 600; }
.resource-guide ol { padding-left: 20px; margin: 15px 0 0; }
.resource-guide a { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }
.resource-guide-aside { padding: 24px; border-radius: 14px; background: var(--canvas); }
.resource-guide-aside p:last-child { margin-bottom: 0; }
.keyboard-resources { margin-top: 48px; margin-bottom: 15px; max-width: 980px; }
.keyboard-resources .resource-eyebrow { margin-bottom: 5px; }
.resource-start-link { color: var(--muted); margin: 20px 0 0; text-align: center; font-size: 13px; }
.resource-start-link a { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }
.footer-resource-links { display: flex; flex-wrap: wrap; gap: 10px 18px; margin-bottom: 18px; font-size: 13px; color: var(--muted); }
.footer-resource-links a:hover { color: var(--ink); text-decoration: underline; }
@media (max-width: 1000px) {
    .site-header .header-inner { flex-wrap: wrap; height: auto; min-height: 64px; gap: 0 16px; padding-block: 12px 0; }
    .site-header .header-actions { margin-inline-start: auto; }
    .site-primary-nav { order: 3; width: 100%; min-width: 0; max-width: 100%; flex-wrap: wrap; margin-top: 10px; padding-block: 0 8px; gap: 8px; }
    .site-primary-nav a { padding: 7px 17px; }
    .resource-grid { gap: 12px; }
    .resource-card { flex-wrap: wrap; gap: 10px; padding: 18px; }
    .resource-card-body { flex-basis: calc(100% - 60px); }
    .resource-card-arrow { display: none; }
}
@media (max-width: 680px) {
    .site-header .header-inner { padding-inline: 16px; }
    .site-primary-nav { gap: 2px; justify-content: space-between; }
    .site-primary-nav a { padding-inline: 15px; font-size: 12px; }
    .resource-shell.container, .keyboard-resources.container { width: calc(100% - 32px); }
    .resource-breadcrumb { padding-top: 18px; font-size: 11px; gap: 7px; }
    .resource-hero { gap: 16px; padding: 25px 0; }
    .resource-hero h1 { font-size: 31px; letter-spacing: -.7px; }
    .resource-hero p { font-size: 14px; }
    .resource-hero-mark { display: none; }
    .resource-feature { grid-template-columns: 1fr; padding: 23px; gap: 25px; border-radius: 16px; }
    .resource-feature h2 { font-size: 26px; }
    .resource-syllable-art { min-height: 190px; }
    .resource-grid { grid-template-columns: 1fr; }
    .resource-guide { grid-template-columns: 1fr; gap: 22px; margin-top: 30px; }
    .resource-card { flex-wrap: nowrap; padding: 20px; gap: 16px; }
    .resource-card-body { flex-basis: auto; }
    .resource-card-arrow { display: block; }
    .resource-section-heading h2 { font-size: 21px; }
    .resource-section, .resource-next { margin-top: 28px; }
    .keyboard-resources { margin-top: 34px; }
}
@media (prefers-reduced-motion: reduce) { .resource-card { transition: none; } }

/* Learning paths share the i2Bopomo shell; Zhuyin remains the first destination. */
.resource-learning-nav { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; max-width: 740px; margin-top: 20px; font-size: 13px; }
.resource-learning-nav > span { grid-column: 1 / -1; margin-bottom: 2px; color: var(--muted); font-size: 12px; }
.resource-learning-nav a { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 7px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); color: var(--ink); font-weight: 600; }
.resource-learning-nav a[aria-current] { border-color: transparent; background: var(--accent-soft); color: var(--accent-readable, var(--accent)); }
.resource-learning-nav a:hover { border-color: var(--accent-readable, var(--accent)); }
.resource-topic-nav { display: flex; flex-wrap: wrap; gap: 7px; margin: -5px 0 28px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.resource-topic-nav a { padding: 7px 10px; border-radius: 7px; color: var(--muted); font-size: 12px; font-weight: 600; }
.resource-topic-nav a:hover { background: var(--surface); color: var(--ink); }
.resource-topic-nav a[aria-current] { color: var(--accent-readable, var(--accent)); background: var(--accent-soft); }
.pinyin-keyboard-guide { margin: 44px auto 50px; text-align: left; }
.pinyin-keyboard-guide h2 { margin: 0; font-size: 24px; line-height: 1.3; }
.pinyin-keyboard-guide > p { max-width: 780px; margin: 13px 0 20px; color: var(--muted); line-height: 1.7; font-size: 14px; }
.pinyin-quick-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; list-style: none; margin: 0 0 28px; padding: 0; counter-reset: pinyin-step; }
.pinyin-quick-steps li { padding: 20px; border: 1px solid var(--line); border-radius: 13px; background: var(--surface); counter-increment: pinyin-step; }
.pinyin-quick-steps li::before { content: '0' counter(pinyin-step); display: block; margin-bottom: 10px; color: var(--accent-readable, var(--accent)); font-size: 12px; font-weight: 700; }
.pinyin-quick-steps h3 { margin: 0 0 8px; color: var(--ink); font-size: 16px; }
.pinyin-quick-steps p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.pinyin-quick-steps code { color: var(--ink); font-size: 14px; }
@media (max-width: 650px) { .pinyin-quick-steps { grid-template-columns: 1fr; } .resource-learning-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); max-width: 420px; } .resource-topic-nav { gap: 4px; } }

@media print { .resource-learning-nav, .resource-topic-nav { display: none !important; } }

/* Native disclosures keep all navigation reachable without JavaScript. */
.site-primary-nav { position: relative; }
.primary-disclosure > summary { min-height: 40px; padding: 9px 11px; gap: 7px; border-radius: 8px; color: var(--muted); font-size: 13px; line-height: 1.4; white-space: nowrap; }
.primary-disclosure > summary .icon { width: 12px; height: 12px; }
.primary-disclosure > summary:hover { background: var(--canvas); color: var(--ink); }
.primary-disclosure:is(.is-current, [open]) > summary { color: var(--accent-readable, var(--accent)); background: var(--accent-soft); }
.primary-disclosure[open] > summary .icon { transform: rotate(180deg); }
.primary-disclosure > summary:focus-visible, .primary-nav-panel a:focus-visible { outline: 2px solid var(--accent-readable, var(--accent)); outline-offset: -2px; }
.primary-nav-panel { position: absolute; z-index: 80; top: calc(100% + 8px); left: 50%; transform: translateX(-50%); width: min(300px, calc(100vw - 32px)); max-height: min(610px, calc(100dvh - 160px)); overflow-y: auto; padding: 17px; border: 1px solid var(--line); border-radius: 15px; background: var(--surface); box-shadow: 0 16px 40px #17243924; text-align: left; }
.primary-nav-panel.primary-nav-wide { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; width: min(540px, calc(100vw - 32px)); }
.primary-nav-group { min-width: 0; }
.primary-nav-heading { display: block; margin: 3px 10px 9px; color: var(--muted); font-size: 11px; font-weight: 600; }
.site-primary-nav .primary-nav-panel a { display: block; padding: 10px; font-size: 13px; line-height: 1.5; white-space: normal; color: var(--ink); }
.site-primary-nav .primary-nav-panel a[aria-current] { color: var(--accent-readable, var(--accent)); }
@media (max-width: 680px) { .primary-disclosure > summary { padding: 8px; gap: 5px; font-size: 12px; } .site-primary-nav { justify-content: center; gap: 3px; } }
@media (max-width: 430px) { .primary-nav-panel.primary-nav-wide { grid-template-columns: 1fr; gap: 16px; } .primary-nav-group + .primary-nav-group { border-top: 1px solid var(--line); padding-top: 12px; } }

@media (max-width: 360px) { .primary-disclosure > summary { padding-inline: 4px; gap: 4px; } }

/* These labels remain English until translated, including in an RTL shell. */
.site-primary-nav[lang="en"] { font-family: "Google Sans Flex", sans-serif; --primary-nav-font-size: 13px; }
.site-primary-nav[lang="en"] .primary-disclosure > summary { font-size: var(--primary-nav-font-size); line-height: 1.4; }
@media (max-width: 680px) { .site-primary-nav[lang="en"] { --primary-nav-font-size: 12px; } }

/* Four learning paths: one compact subject selector, with a full-link fallback. */
.native-name { color: var(--ink); font-family: Arial, sans-serif; font-size: 1em; font-weight: 600; letter-spacing: .02em; white-space: nowrap; text-align: right; }
:root[data-appearance="dark"] .native-name { color: var(--ink); }
.site-primary-nav .primary-nav-panel .primary-named-link { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.primary-named-link > span:first-child { min-width: 0; }
.primary-nav-panel.primary-learning-panel { width: min(640px, calc(100vw - 32px)); padding: 12px; }
.learning-topic-panels { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px 20px; min-width: 0; }
.learning-topic-panel { min-width: 0; }
.learning-menu-title { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin: 6px 10px 7px; color: var(--ink); font-size: 16px; line-height: 1.5; font-weight: 650; }
.learning-menu-intro { margin: 0 10px 12px; padding-bottom: 12px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 12px; line-height: 1.6; }
.site-primary-nav .learning-topic-panel a { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding-block: 9px; }
.learning-menu-arrow { color: var(--muted); font-weight: 400; }
.has-subject-tabs { display: grid; grid-template-columns: 210px minmax(0, 1fr); gap: 12px; }
.has-subject-tabs .learning-topic-panels { display: block; padding: 3px 4px; min-height: 310px; }
.learning-subjects { padding: 7px 12px 7px 0; border-right: 1px solid var(--line); }
.learning-subjects > .primary-nav-heading { margin: 2px 10px 13px; }
.learning-subject-list { display: grid; gap: 5px; }
.learning-subject { display: flex; align-items: center; justify-content: space-between; gap: 14px; width: 100%; min-width: 0; min-height: 46px; padding: 10px 12px; border: 0; border-radius: 9px; background: transparent; color: var(--ink); text-align: left; font: 600 13px/1.5 var(--font-body); cursor: pointer; }
.learning-subject:hover { background: var(--canvas); }
.learning-subject[aria-selected="true"] { background: var(--accent-soft); color: var(--accent-readable, var(--accent)); box-shadow: inset 3px 0 0 var(--accent); }
.learning-subject:focus-visible { outline: 2px solid var(--accent-readable, var(--accent)); outline-offset: -2px; }
.learning-subjects[hidden], .learning-topic-panel[hidden] { display: none; }
.footer-resource-links.resource-footer-groups { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; width: 100%; margin-bottom: 24px; }
.resource-footer-group { display: flex; flex-direction: column; align-items: flex-start; gap: 9px; min-width: 0; }
.resource-footer-group strong { display: flex; align-items: center; justify-content: space-between; gap: 12px; width: 100%; color: var(--ink); margin-bottom: 4px; font-size: 13px; }
.resource-footer-group a[aria-current] { color: var(--accent-readable, var(--accent)); }
@media (max-width: 850px) { .footer-resource-links.resource-footer-groups { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; } }
@media (max-width: 600px) {
    .primary-nav-panel.primary-learning-panel { width: min(400px, calc(100vw - 32px)); padding: 10px; }
    .has-subject-tabs { grid-template-columns: 1fr; gap: 6px; }
    .learning-subjects { padding: 3px 0 12px; border-right: 0; border-bottom: 1px solid var(--line); }
    .learning-subjects > .primary-nav-heading { margin-bottom: 9px; }
    .learning-subject-list { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px; }
    .learning-subject { min-height: 43px; padding: 9px 10px; font-size: 12px; gap: 8px; }
    .has-subject-tabs .learning-topic-panels { min-height: 0; padding: 3px 0; }
    .learning-topic-panels { grid-template-columns: 1fr; }
    .learning-menu-title { font-size: 15px; }
    .learning-menu-intro { margin-bottom: 7px; padding-bottom: 8px; }
    .site-primary-nav .learning-topic-panel a { padding-block: 8px; }
}
@media (max-width: 480px) {
    .footer-resource-links.resource-footer-groups { grid-template-columns: 1fr; gap: 24px; }
    .resource-footer-group { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px 16px; }
    .resource-footer-group strong { grid-column: 1 / -1; }
}

/* Keep site-information navigation in the same order as the i2 suite. */
/* Compact keyboard shortcuts, separated from learning and site information. */
.site-footer .footer-resource-links.resource-footer-groups { margin-bottom: 8px; }
.footer-keyboard-links { width: 100%; justify-content: center; gap: 10px; margin-bottom: 6px; padding-block: 20px; border-block: 1px solid var(--line); font-family: var(--font-body); font-size: 13px; }
.footer-note a { display: inline-block; margin-inline-start: 14px; text-decoration: underline; text-underline-offset: 3px; }
.footer-note a:hover { color: var(--ink); }
.footer-keyboard-links a { display: inline-flex; align-items: center; justify-content: center; min-height: 38px; padding: 8px 15px; border: 1px solid var(--line); border-radius: 9px; background: var(--surface); color: var(--ink); font-weight: 500; line-height: 1.4; text-decoration: none; }
.footer-keyboard-links a:hover { background: var(--canvas); color: var(--accent-readable, var(--accent)); text-decoration: none; }
.footer-keyboard-links a[aria-current] { background: var(--accent-soft); color: var(--accent-readable, var(--accent)); font-weight: 600; text-decoration: none; }
.footer-keyboard-links a:focus-visible { outline-offset: -2px; }
.footer-information-links a:focus-visible { outline-offset: -2px; }

/* The blog is a direct destination alongside the four navigation menus. */
.site-primary-nav > .primary-blog-link { padding: 9px 11px; font-size: var(--primary-nav-font-size, 13px); line-height: 1.4; }
.site-primary-nav > .primary-blog-link:focus-visible { outline: 2px solid var(--accent-readable, var(--accent)); outline-offset: -2px; }
@media (max-width: 680px) { .site-primary-nav > .primary-blog-link { padding: 8px; } }
@media (max-width: 360px) { .site-primary-nav { gap: 1px; } .site-primary-nav > .primary-blog-link { padding-inline: 4px; } }