/* VyNews Theme Preview • Bootstrap 5.3.8 base + shared responsive contract
   Theme files should only set variables and theme-specific visual decoration. */
:root {
  color-scheme: dark;
  --vn-page: #101820;
  --vn-ink: #f3f0e7;
  --vn-muted: #b8b7b2;
  --vn-accent: #e7bb70;
  --vn-accent-ink: #17170f;
  --vn-accent-soft: rgba(233,181,93,.11);
  --vn-border: rgba(255,255,255,.14);
  --vn-card: rgba(28,36,40,.91);
  --vn-card-hover: rgba(35,47,48,.96);
  --vn-header: rgba(17,25,29,.88);
  --vn-panel: rgba(20,29,32,.88);
  --vn-input: rgba(255,255,255,.045);
  --vn-chip: rgba(255,255,255,.055);
  --vn-chip-border: rgba(255,255,255,.12);
  --vn-shadow: 0 18px 40px rgba(0,0,0,.18);
  --vn-heading-font: Georgia,"Noto Serif TC","Songti TC",serif;
  --vn-sans-font: "Noto Sans TC","Microsoft JhengHei",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body.vn-app { margin:0; min-height:100vh; font-family:var(--vn-sans-font); color:var(--vn-ink); background-color:var(--vn-page); background-attachment:fixed; transition:background-color .32s ease,color .32s ease; }
a { color:inherit; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible { outline:3px solid var(--vn-accent); outline-offset:4px; }
button { font-family:inherit; }
::selection { background:var(--vn-accent); color:var(--vn-accent-ink); }
.vn-app-shell { position:relative; isolation:isolate; min-height:100vh; }
.vn-app-shell::before { content:""; position:fixed; z-index:-2; inset:0; pointer-events:none; }
.vn-app-shell::after { content:""; position:fixed; z-index:-1; inset:0; pointer-events:none; }
.vn-header { position:sticky; top:0; z-index:30; border-bottom:1px solid var(--vn-border); background:var(--vn-header); backdrop-filter:blur(22px); -webkit-backdrop-filter:blur(22px); }
.vn-topbar { min-height:78px; gap:18px; }
.vn-brand { display:inline-flex; text-decoration:none; align-items:center; gap:11px; min-width:0; }
.vn-brand-emblem { width:42px; height:42px; border-radius:13px; display:inline-grid; place-items:center; color:var(--vn-accent); background:var(--vn-accent-soft); border:1px solid var(--vn-border); font-family:var(--vn-heading-font); font-size:1.25rem; line-height:1; flex:none; }
.vn-brand-name { color:var(--vn-ink); font-family:var(--vn-heading-font); font-size:1.45rem; letter-spacing:-.035em; font-weight:700; line-height:1.04; }
.vn-brand-small { font-size:.57rem; font-weight:750; letter-spacing:.29em; color:var(--vn-muted); margin-top:4px; }
.vn-navline { display:flex; align-items:center; gap:24px; }
.vn-navline a { text-decoration:none; font-size:.79rem; color:var(--vn-muted); transition:color .2s ease; }
.vn-navline a:hover { color:var(--vn-ink); }
.vn-header-links { display:flex; align-items:center; justify-content:space-between; gap:14px; min-height:54px; padding:8px 0 12px; border-top:1px solid var(--vn-border); }
.vn-site-links { display:flex; align-items:center; gap:10px; margin-left:auto; }
.vn-site-links a { display:inline-flex; align-items:center; justify-content:center; min-height:36px; padding:7px 13px; border:1px solid var(--vn-border); border-radius:10px; background:var(--vn-chip); color:var(--vn-ink); text-decoration:none; font-size:.76rem; font-weight:650; white-space:nowrap; }
.vn-site-links a:hover { border-color:var(--vn-accent); color:var(--vn-accent); }
@media (max-width:767.98px) {
  .vn-header-links { padding:7px 0 9px; }
  .vn-site-links { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:8px; margin-left:0; width:100%; }
  .vn-site-links a { min-height:40px; padding:8px 6px; font-size:.75rem; }
}
.vn-version { color:var(--vn-muted); text-transform:uppercase; font-size:.64rem; letter-spacing:.15em; }
.vn-switcher { display:inline-flex; align-items:center; gap:4px; padding:4px; border:1px solid var(--vn-border); background:var(--vn-chip); border-radius:14px; }
.vn-theme-button { color:var(--vn-muted); font-size:.78rem; background:transparent; border:0; border-radius:10px; padding:10px 15px; transition:background .15s,color .15s; white-space:nowrap; }
.vn-theme-button:hover { color:var(--vn-ink); }
.vn-theme-button[aria-pressed="true"] { background:var(--vn-accent); color:var(--vn-accent-ink); font-weight:750; box-shadow:0 3px 12px rgba(0,0,0,.14); }
.vn-mobile-theme { width:100%; justify-content:space-between; }
.vn-mobile-theme .vn-theme-button { flex:1; }
/* Four theme choices: two comfortable rows on narrow screens. */
@media (max-width:767.98px) {
  .vn-mobile-theme { flex-wrap:wrap; justify-content:stretch; }
  .vn-mobile-theme .vn-theme-button { flex:1 1 calc(50% - 4px); min-width:0; padding:9px 6px; }
}
.vn-hero { position:relative; overflow:hidden; margin-top:29px; border:1px solid var(--vn-border); border-radius:26px; min-height:360px; background:var(--vn-panel); box-shadow:var(--vn-shadow); }
.vn-hero::before,.vn-hero::after { content:""; pointer-events:none; position:absolute; }
.vn-hero-inner { position:relative; z-index:1; padding:53px 55px 48px; }
.vn-eyebrow { font-size:.7rem; text-transform:uppercase; letter-spacing:.25em; font-weight:750; color:var(--vn-accent); display:flex; align-items:center; gap:10px; margin-bottom:20px; }
.vn-eyebrow:before { content:""; width:24px; height:1px; background:currentColor; opacity:.8; }
.vn-hero h1 { font-family:var(--vn-heading-font); font-size:clamp(2.5rem,4.4vw,4.15rem); line-height:1.24; letter-spacing:-.047em; font-weight:700; margin:0 0 20px; text-wrap:balance; }
.vn-hero-lead { max-width:550px; line-height:1.95; color:var(--vn-muted); font-size:.92rem; margin-bottom:27px; }
.vn-hero-meta { display:flex; flex-wrap:wrap; align-items:center; gap:16px; font-size:.73rem; color:var(--vn-muted); }
.vn-hero-meta span { display:inline-flex; align-items:center; gap:8px; }
.vn-hero-meta .vn-divider-dot { color:var(--vn-accent); opacity:.65; }
.vn-hero-meta svg { flex:none; }
.vn-hero-art { position:relative; height:100%; display:grid; place-items:center; min-height:300px; }
.vn-art-orbit { position:relative; width:min(260px,100%); aspect-ratio:1; display:grid; place-items:center; }
.vn-art-orbit::before,.vn-art-orbit::after,.vn-art-center::before,.vn-art-center::after { content:""; position:absolute; pointer-events:none; }
.vn-art-ring { position:absolute; inset:9%; border-radius:50%; }
.vn-art-center { display:grid; place-items:center; position:relative; border-radius:50%; width:62%; aspect-ratio:1; z-index:1; }
.vn-art-glyph { font-family:Georgia,serif; font-size:5rem; line-height:1; position:relative; z-index:2; }
.vn-art-top,.vn-art-bottom { position:absolute; z-index:2; font-size:.66rem; letter-spacing:.23em; font-family:Georgia,serif; white-space:nowrap; }
.vn-art-top { top:3%; } .vn-art-bottom { bottom:3%; }
.vn-decor-point { position:absolute; width:6px; aspect-ratio:1; transform:rotate(45deg); }
.vn-decor-point.p1 { top:13%; left:15%; }.vn-decor-point.p2 { top:23%; right:4%; }.vn-decor-point.p3 { bottom:12%; right:17%; }.vn-decor-point.p4 { bottom:19%; left:4%; }
.vn-section-head { display:flex; align-items:end; justify-content:space-between; gap:24px; margin-top:50px; margin-bottom:22px; }
.vn-kicker { color:var(--vn-accent); font-size:.68rem; letter-spacing:.22em; text-transform:uppercase; font-weight:750; margin-bottom:9px; }
.vn-section-title { font-family:var(--vn-heading-font); font-size:clamp(1.65rem,2.35vw,2.35rem); font-weight:700; letter-spacing:-.05em; margin:0; }
.vn-section-note { color:var(--vn-muted); font-size:.73rem; margin-bottom:5px; }
.vn-toolbar { padding:12px; border:1px solid var(--vn-border); background:var(--vn-panel); border-radius:17px; margin-bottom:20px; display:flex; gap:10px; align-items:center; flex-wrap:wrap; }
.vn-filters { display:flex; gap:6px; flex-wrap:wrap; }
.vn-filter { border:1px solid transparent; color:var(--vn-muted); background:transparent; border-radius:11px; padding:9px 14px; font-size:.78rem; white-space:nowrap; }
.vn-filter:hover { color:var(--vn-ink); background:var(--vn-chip); }
.vn-filter[aria-pressed="true"] { color:var(--vn-accent-ink); background:var(--vn-accent); border-color:var(--vn-accent); font-weight:750; }
.vn-search { margin-left:auto; display:flex; align-items:center; gap:10px; border:1px solid var(--vn-chip-border); color:var(--vn-muted); border-radius:12px; background:var(--vn-input); min-width:230px; padding:0 12px; }
.vn-search input { background:none; border:0; outline:0; box-shadow:none; padding:10px 0; font-size:.8rem; width:100%; color:var(--vn-ink); }
.vn-search input::placeholder { color:var(--vn-muted); opacity:.76; }
.vn-search svg { flex:none; opacity:.8; }
.vn-card { height:100%; position:relative; display:flex; flex-direction:column; border:1px solid var(--vn-border); border-radius:17px; background:var(--vn-card); box-shadow:var(--vn-shadow); padding:25px 25px 20px; overflow:hidden; transition:transform .2s ease,border-color .2s ease,background .2s ease; }
.vn-card:hover { background:var(--vn-card-hover); border-color:var(--vn-accent); transform:translateY(-3px); }
.vn-card::before { content:""; display:block; position:absolute; top:0; left:0; width:100%; height:2px; opacity:.48; background:linear-gradient(90deg,transparent,var(--vn-accent),transparent); }
.vn-card-eyebrow { display:flex; align-items:center; gap:8px; font-size:.67rem; margin-bottom:24px; color:var(--vn-muted); }
.vn-card-category { color:var(--vn-accent); font-weight:750; font-size:.65rem; letter-spacing:.05em; text-transform:uppercase; }
.vn-card-sep { width:3px; aspect-ratio:1; border-radius:50%; background:var(--vn-muted); opacity:.7; }
.vn-card-date { margin-right:auto; }
.vn-save { appearance:none; border:0; background:transparent; color:var(--vn-muted); margin:-9px -9px -9px 0; padding:9px; border-radius:50%; font-size:1.19rem; line-height:1; }
.vn-save:hover,.vn-save[aria-pressed="true"] { color:var(--vn-accent); background:var(--vn-accent-soft); }
.vn-card h3 { font-size:1.09rem; font-weight:760; color:var(--vn-ink); letter-spacing:-.02em; line-height:1.64; margin-bottom:13px; }
.vn-card-summary { color:var(--vn-muted); font-size:.8rem; line-height:1.9; margin-bottom:22px; flex:1; }
.vn-card-tags { display:flex; flex-wrap:wrap; gap:7px; margin:0 0 21px; }
.vn-tag { color:var(--vn-muted); background:var(--vn-chip); border:1px solid var(--vn-chip-border); padding:5px 9px; border-radius:6px; font-size:.67rem; }
.vn-card-footer { display:flex; align-items:center; justify-content:space-between; gap:8px; padding-top:15px; border-top:1px solid var(--vn-border); }
.vn-source { color:var(--vn-muted); font-size:.68rem; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.vn-card-actions { display:flex; gap:12px; align-items:center; }
.vn-action { border:0; padding:4px 0; background:none; color:var(--vn-accent); font-weight:750; font-size:.71rem; white-space:nowrap; }
.vn-action:hover { text-decoration:underline; }
.vn-action[disabled] { cursor:not-allowed; color:var(--vn-muted); opacity:.62; text-decoration:none; }
.vn-banner { margin:31px 0 45px; border:1px solid var(--vn-border); background:var(--vn-panel); border-radius:16px; padding:22px 28px; display:flex; gap:20px; align-items:center; justify-content:space-between; flex-wrap:wrap; }
.vn-banner-title { color:var(--vn-ink); font-size:.84rem; font-weight:760; }
.vn-banner-description { font-size:.73rem; line-height:1.7; color:var(--vn-muted); margin:4px 0 0; }
.vn-banner-mark { width:38px; height:38px; border:1px solid var(--vn-border); border-radius:11px; flex:none; color:var(--vn-accent); display:grid; place-items:center; font-size:1.3rem; }
.vn-primary { background:var(--vn-accent); border:1px solid var(--vn-accent); color:var(--vn-accent-ink); border-radius:10px; padding:10px 18px; font-size:.75rem; font-weight:750; }
.vn-primary:hover { filter:brightness(1.08); }
.vn-footer { border-top:1px solid var(--vn-border); padding:27px 0 40px; color:var(--vn-muted); font-size:.72rem; }
.vn-footer a { color:var(--vn-accent); text-decoration:none; }
.vn-footer a:hover { text-decoration:underline; }
.vn-empty { border:1px dashed var(--vn-border); background:var(--vn-panel); border-radius:16px; padding:52px 25px; text-align:center; color:var(--vn-muted); }
.vn-toast { position:fixed; bottom:22px; left:50%; z-index:100; transform:translate(-50%,24px); border:1px solid var(--vn-border); border-radius:13px; background:var(--vn-card); box-shadow:0 12px 45px rgba(0,0,0,.3); color:var(--vn-ink); font-size:.78rem; line-height:1.6; padding:14px 20px; max-width:min(480px,calc(100vw - 30px)); opacity:0; pointer-events:none; transition:opacity .2s,transform .2s; }
.vn-toast.is-visible { opacity:1; transform:translate(-50%,0); }
.vn-status { display:inline-flex; align-items:center; gap:9px; padding:9px 13px; border:1px solid var(--vn-border); border-radius:10px; background:var(--vn-panel); font-size:.69rem; color:var(--vn-muted); }
.vn-status-dot { display:inline-block; width:6px; height:6px; border-radius:50%; background:var(--vn-accent); }
@media (max-width:991.98px) { .vn-hero-inner { padding:41px 37px 39px; } .vn-hero-art { min-height:275px; } .vn-art-orbit { width:230px; } .vn-hero { min-height:330px; } }
@media (max-width:767.98px) { .vn-topbar { min-height:70px; } .vn-hero { margin-top:15px; border-radius:18px; } .vn-hero-inner { padding:34px 25px 30px; } .vn-hero-art { min-height:175px; margin-top:-12px; margin-bottom:14px; } .vn-art-orbit { width:160px; } .vn-art-glyph { font-size:3rem; } .vn-hero h1 { font-size:clamp(2.25rem,8vw,3.1rem); } .vn-section-head { margin-top:37px; } .vn-toolbar { padding:10px; } .vn-filters { width:100%; flex-wrap:nowrap; overflow-x:auto; scrollbar-width:thin; } .vn-filter { padding:9px 10px; } .vn-search { width:100%; min-width:0; margin-left:0; } .vn-card { padding:21px; } .vn-card-eyebrow { margin-bottom:14px; } .vn-banner { padding:20px; } }
@media (prefers-reduced-motion:reduce) { *,*::before,*::after { animation-duration:.01ms !important; animation-iteration-count:1 !important; scroll-behavior:auto !important; transition-duration:.01ms !important; } }
/* Production reader: source attribution, paging and date/error states. */
.vn-card-footer { flex-wrap:wrap; }
.vn-source { max-width:100%; white-space:normal; overflow-wrap:anywhere; line-height:1.6; }
.vn-card-actions a.vn-action { text-decoration:none; }
.vn-card-actions a.vn-action:hover { text-decoration:underline; }
.vn-attributions { width:100%; display:grid; gap:6px; padding-top:10px; border-top:1px dashed var(--vn-border); margin-top:10px; color:var(--vn-muted); font-size:.67rem; line-height:1.65; overflow-wrap:anywhere; }
.vn-source-details { width:100%; padding-top:8px; }
.vn-source-details summary { cursor:pointer; color:var(--vn-accent); font-size:.73rem; }
.vn-source-list { padding-left:1.2rem; margin:8px 0 0; color:var(--vn-muted); font-size:.72rem; }
.vn-source-list li { margin:5px 0; overflow-wrap:anywhere; }
.vn-source-list a { color:var(--vn-accent); }
.vn-more-wrap { margin:25px 0 36px; }
.vn-update-time { overflow-wrap:anywhere; }
.vn-card h3, .vn-card-summary { overflow-wrap:anywhere; }
@media (max-width:575.98px) { .vn-card-footer { align-items:flex-start; } .vn-card-actions { margin-left:auto; } }

/* Schema 1.0 AI News + AI Insight card layers. Neutral to active Theme CSS. */
.vn-update-card { gap:0; }
.vn-update-card .vn-card-eyebrow { margin-bottom:14px; }
.vn-update-card .vn-card-footer { margin-top:auto; }
.vn-news-layer { padding:4px 0 13px; min-width:0; }
.vn-layer-title { margin:0 0 10px; font-size:.76rem; font-weight:800; color:var(--vn-accent); letter-spacing:.025em; }
.vn-update-card .vn-card-summary { margin:0 0 12px; flex:initial; color:var(--vn-ink); line-height:1.8; }
.vn-fact-meta { display:flex; flex-wrap:wrap; gap:6px; margin-bottom:12px; }
.vn-meta-chip { padding:4px 8px; border-radius:8px; background:var(--vn-chip); color:var(--vn-ink); font-size:.67rem; line-height:1.5; overflow-wrap:anywhere; }
.vn-eligibility { color:var(--vn-muted); font-size:.74rem; line-height:1.7; overflow-wrap:anywhere; margin:0; }
.vn-insight-layer { min-width:0; padding:15px 14px 12px; margin:0 0 20px; border:1px solid var(--vn-border); border-left:3px solid var(--vn-accent); border-radius:11px; background:var(--vn-panel); }
.vn-insight-disclaimer { margin:0 0 14px; font-size:.68rem; line-height:1.5; color:var(--vn-muted); }
.vn-insight-heading { font-size:.74rem; font-weight:750; line-height:1.6; color:var(--vn-ink); margin:0 0 5px; }
.vn-insight-text { margin:0 0 12px; font-size:.76rem; line-height:1.8; color:var(--vn-muted); white-space:pre-line; overflow-wrap:anywhere; }
.vn-insight-details { border-top:1px solid var(--vn-border); margin-top:3px; padding-top:10px; }
.vn-insight-details summary { color:var(--vn-accent); font-size:.74rem; font-weight:750; cursor:pointer; list-style-position:inside; }
.vn-insight-details summary:focus-visible,.vn-filter:focus-visible,.vn-save:focus-visible { outline:2px solid var(--vn-accent); outline-offset:2px; }
.vn-insight-details[open] summary { margin-bottom:13px; }
.vn-insight-point + .vn-insight-point { border-top:1px solid var(--vn-border); padding-top:10px; }
.vn-update-card .vn-card-tags { margin:0 0 15px; }
.vn-update-card .vn-card-footer { align-items:flex-start; }
.vn-update-card .vn-source { min-width:0; flex:1 1 100%; }
.vn-update-card .vn-card-actions { margin-left:auto; }
.vn-update-card .vn-attributions { width:100%; margin:6px 0 0; color:var(--vn-muted); font-size:.66rem; line-height:1.6; overflow-wrap:anywhere; }
@media (max-width:767.98px) {
  .vn-insight-layer { padding:13px 12px 10px; margin-bottom:15px; }
  .vn-filters { -webkit-overflow-scrolling:touch; }
  .vn-filter { flex:0 0 auto; }
  .vn-update-card { padding:19px; }
}