/* YD DISTRIBUTION — public blog (/articles, /article/{slug}) · palette from index.html (#03338a) */
:root {
  --yb-brand: #03338a; --yb-brand-2: #1f5fd1; --yb-sky: #0ea5e9; --yb-ink: #0f172a; --yb-ink-2: #334155;
  --yb-muted: #64748b; --yb-line: rgba(15, 23, 42, .08); --yb-soft: #eef4ff; --yb-pale: #f8fbff;
  --yb-font: "Prompt", system-ui, -apple-system, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: var(--yb-font); color: var(--yb-ink-2); -webkit-font-smoothing: antialiased;
  background: radial-gradient(1100px 600px at 90% -10%, rgba(3, 51, 138, .10), transparent 60%), radial-gradient(900px 520px at 0% 0%, rgba(14, 165, 233, .08), transparent 55%), linear-gradient(180deg, #f6f8fc, #fff 40%); min-height: 100vh; }
a { color: var(--yb-brand); }
img { max-width: 100%; }
.yb-wrap { max-width: 1160px; margin: 0 auto; padding: 0 20px; }
.yb-wrap--narrow { max-width: 780px; }
.yb-progress { position: fixed; top: 0; left: 0; height: 3px; width: 0; z-index: 60; background: linear-gradient(90deg, var(--yb-brand), var(--yb-sky)); }

.yb-nav { position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, .85); backdrop-filter: blur(14px); border-bottom: 1px solid var(--yb-line); }
.yb-nav__in { display: flex; align-items: center; gap: 16px; padding-top: 12px; padding-bottom: 12px; }
.yb-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--yb-ink); font-weight: 700; font-size: 15px; letter-spacing: .01em; }
.yb-brand b { color: var(--yb-brand); }
.yb-brand__mark { width: 36px; height: 36px; border-radius: 12px; display: grid; place-items: center; color: #fff; background: linear-gradient(180deg, var(--yb-brand-2), var(--yb-brand)); box-shadow: 0 8px 20px rgba(3, 51, 138, .28); }
.yb-nav__links { margin-left: auto; display: flex; align-items: center; gap: 6px; }
.yb-nav__links a:not(.yb-btn) { color: var(--yb-ink-2); text-decoration: none; padding: 8px 12px; border-radius: 10px; font-size: 14.5px; }
.yb-nav__links a:not(.yb-btn):hover, .yb-nav__links a.is-active { background: var(--yb-soft); color: var(--yb-brand); }
@media (max-width: 640px) { .yb-nav__links a:not(.yb-btn):not(.is-active) { display: none; } .yb-brand span:last-child { font-size: 13px; } }

.yb-btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 20px; border-radius: 999px; background: var(--yb-brand); color: #fff !important; font-weight: 600; font-size: 14.5px; text-decoration: none; border: 0; cursor: pointer; transition: transform .2s ease, box-shadow .2s ease; }
.yb-btn:hover { transform: translateY(-2px); box-shadow: 0 12px 26px rgba(3, 51, 138, .3); }
.yb-btn--light { background: #fff; color: var(--yb-brand) !important; }
.yb-btn--ghost { background: transparent; border: 1.5px solid rgba(255, 255, 255, .7); }

.yb-tag { display: inline-flex; align-items: center; gap: 6px; background: #fff; color: var(--yb-brand); font-size: 12.5px; font-weight: 600; padding: 6px 14px; border-radius: 999px; border: 1px solid rgba(3, 51, 138, .14); box-shadow: 0 6px 16px rgba(3, 51, 138, .08); }
.yb-hero { text-align: center; padding: 64px 0 20px; }
.yb-hero h1 { font-size: clamp(30px, 5vw, 48px); line-height: 1.2; color: var(--yb-ink); margin: 18px 0 12px; font-weight: 800; letter-spacing: -.02em; }
.yb-grad { background: linear-gradient(120deg, var(--yb-brand), var(--yb-sky)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.yb-hero p { max-width: 640px; margin: 0 auto; color: var(--yb-muted); font-weight: 300; line-height: 1.75; }
.yb-search { max-width: 480px; margin: 26px auto 0; position: relative; }
.yb-search i { position: absolute; left: 18px; top: 50%; transform: translateY(-50%); color: var(--yb-muted); }
.yb-search input { width: 100%; padding: 14px 18px 14px 46px; border-radius: 999px; border: 1px solid var(--yb-line); font: inherit; background: #fff; box-shadow: 0 10px 30px rgba(15, 23, 42, .06); outline: none; }
.yb-search input:focus { border-color: rgba(3, 51, 138, .4); box-shadow: 0 0 0 4px rgba(3, 51, 138, .1); }

.yb-cats { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; margin: 24px auto 0; }
.yb-cats a { text-decoration: none; font-size: 14px; font-weight: 500; padding: 8px 16px; border-radius: 999px; background: #fff; color: var(--yb-ink-2); border: 1px solid var(--yb-line); transition: .2s; }
.yb-cats a span { opacity: .55; margin-left: 2px; }
.yb-cats a:hover { border-color: rgba(3, 51, 138, .3); color: var(--yb-brand); }
.yb-cats a.is-on { background: var(--yb-brand); color: #fff; border-color: var(--yb-brand); box-shadow: 0 8px 20px rgba(3, 51, 138, .25); }

.yb-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin: 36px 0 0; }
@media (max-width: 960px) { .yb-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .yb-grid { grid-template-columns: 1fr; } }
.yb-card { display: flex; flex-direction: column; background: #fff; border: 1px solid var(--yb-line); border-radius: 22px; overflow: hidden; text-decoration: none; color: inherit; box-shadow: 0 12px 32px rgba(15, 23, 42, .06); transition: transform .3s cubic-bezier(.2, .7, .2, 1), box-shadow .3s, border-color .3s; }
.yb-card:hover { transform: translateY(-6px); box-shadow: 0 24px 50px rgba(3, 51, 138, .16); border-color: rgba(3, 51, 138, .22); }
.yb-card__media { aspect-ratio: 16/10; position: relative; overflow: hidden; background: linear-gradient(135deg, var(--yb-soft), var(--yb-pale)); }
.yb-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.yb-card:hover .yb-card__media img { transform: scale(1.06); }
.yb-card__ph { position: absolute; inset: 0; display: flex; flex-direction: column; gap: 8px; align-items: center; justify-content: center; color: var(--yb-brand);
  background: radial-gradient(circle at 1.5px 1.5px, rgba(3, 51, 138, .14) 1.5px, transparent 0) 0 0/16px 16px, linear-gradient(135deg, var(--yb-soft), var(--yb-pale)); }
.yb-card__ph i { font-size: 40px; }
.yb-card__ph b { font-size: 11.5px; letter-spacing: .08em; text-transform: uppercase; opacity: .7; }
.yb-card__cat { position: absolute; top: 12px; left: 12px; background: rgba(255, 255, 255, .95); color: var(--yb-brand); font-size: 11.5px; font-weight: 600; padding: 5px 12px; border-radius: 999px; box-shadow: 0 4px 12px rgba(15, 23, 42, .08); }
.yb-card__body { padding: 18px 18px 20px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.yb-card__title { font-size: 17px; font-weight: 700; color: var(--yb-ink); line-height: 1.42; margin: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.yb-card:hover .yb-card__title { color: var(--yb-brand); }
.yb-card__ex { font-size: 14px; font-weight: 300; color: var(--yb-muted); line-height: 1.65; margin: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.yb-card__meta { margin-top: auto; padding-top: 12px; border-top: 1px solid var(--yb-line); display: flex; gap: 12px; font-size: 12.5px; color: #94a3b8; }
.yb-card__go { margin-left: auto; color: var(--yb-brand); font-weight: 600; }

.yb-pager { display: flex; gap: 8px; justify-content: center; margin: 40px 0 0; }
.yb-pager a, .yb-pager span { min-width: 42px; height: 42px; padding: 0 12px; display: inline-flex; align-items: center; justify-content: center; border-radius: 12px; text-decoration: none; font-weight: 600; background: #fff; border: 1px solid var(--yb-line); color: var(--yb-ink-2); }
.yb-pager .is-on { background: var(--yb-brand); color: #fff; border-color: var(--yb-brand); }
.yb-pager .is-gap { border: 0; background: transparent; }
.yb-empty { text-align: center; padding: 80px 20px; color: var(--yb-muted); }
.yb-empty i { font-size: 3rem; color: rgba(3, 51, 138, .35); }
.yb-empty h1, .yb-empty h2 { color: var(--yb-ink); margin: 12px 0 6px; }

/* ---- article ---- */
.yb-crumb { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: 13px; color: var(--yb-muted); padding: 26px 0 0; }
.yb-crumb a { color: var(--yb-muted); text-decoration: none; }
.yb-crumb a:hover { color: var(--yb-brand); }
.yb-crumb .bi-chevron-right { font-size: 10px; }
.yb-article__head { padding: 26px 0 8px; }
.yb-article__head h1 { font-size: clamp(28px, 4.6vw, 42px); line-height: 1.25; color: var(--yb-ink); font-weight: 800; margin: 16px 0 14px; letter-spacing: -.02em; }
.yb-lead { font-size: 18px; color: var(--yb-muted); font-weight: 300; line-height: 1.7; margin: 0 0 16px; }
.yb-meta { display: flex; flex-wrap: wrap; gap: 8px; }
.yb-meta span { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; padding: 6px 12px; border-radius: 999px; background: #fff; border: 1px solid var(--yb-line); }
.yb-meta i { color: var(--yb-brand); }
.yb-meta b { color: var(--yb-ink); font-weight: 600; }
.yb-cover { max-width: 1000px; margin: 26px auto 0; padding: 0 20px; }
.yb-cover img { width: 100%; display: block; border-radius: 24px; box-shadow: 0 24px 60px rgba(3, 51, 138, .18); }
.yb-body { position: relative; background: #fff; border: 1px solid var(--yb-line); border-radius: 26px; padding: clamp(22px, 4vw, 48px); margin: 28px 0 0; box-shadow: 0 18px 50px rgba(15, 23, 42, .06); }
.yb-body::before { content: ""; position: absolute; top: 0; left: 40px; right: 40px; height: 4px; border-radius: 0 0 4px 4px; background: linear-gradient(90deg, var(--yb-brand), var(--yb-sky), transparent); opacity: .6; }
.yb-content { font-size: 17px; line-height: 1.9; color: #293244; font-weight: 300; overflow-wrap: anywhere; }
.yb-content > p:first-child { font-size: 18px; font-weight: 400; color: var(--yb-ink); }
.yb-content h2 { font-size: 24px; font-weight: 700; color: var(--yb-ink); margin: 38px 0 14px; padding-left: 16px; position: relative; line-height: 1.35; }
.yb-content h2::before { content: ""; position: absolute; left: 0; top: 6px; bottom: 6px; width: 5px; border-radius: 3px; background: linear-gradient(180deg, var(--yb-brand-2), var(--yb-brand)); }
.yb-content h3 { font-size: 20px; font-weight: 700; color: var(--yb-ink); margin: 28px 0 10px; }
.yb-content p { margin: 0 0 18px; }
.yb-content a { text-decoration: underline; text-underline-offset: 3px; }
.yb-content ul, .yb-content ol { padding-left: 24px; margin: 0 0 18px; }
.yb-content li { margin-bottom: 8px; }
.yb-content img { height: auto; border-radius: 16px; margin: 18px 0; }
.yb-content iframe { width: 100%; aspect-ratio: 16/9; border: 0; border-radius: 16px; margin: 18px 0; background: var(--yb-soft); }
.yb-content iframe[src*="spotify"] { aspect-ratio: auto; height: 352px; }
.yb-content blockquote { margin: 22px 0; padding: 16px 22px; border-left: 4px solid var(--yb-brand-2); background: var(--yb-soft); border-radius: 0 14px 14px 0; font-style: italic; color: var(--yb-ink-2); }
.yb-content code { background: var(--yb-soft); color: var(--yb-brand); padding: 2px 7px; border-radius: 6px; font-size: .9em; }
.yb-content pre { background: #0f172a; color: #e2e8f0; padding: 16px; border-radius: 14px; overflow: auto; }
.yb-content table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 15px; }
.yb-content th, .yb-content td { border: 1px solid var(--yb-line); padding: 10px 12px; text-align: left; }
.yb-content th { background: var(--yb-pale); }
.yb-content strong { color: var(--yb-ink); font-weight: 600; }
.yb-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.yb-tags span { font-size: 13px; color: var(--yb-brand); background: var(--yb-soft); padding: 5px 12px; border-radius: 999px; }
.yb-share { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 28px; padding-top: 22px; border-top: 1px solid var(--yb-line); }
.yb-share span { font-size: 14px; color: var(--yb-muted); margin-right: 4px; }
.yb-share a, .yb-share button { width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; background: var(--yb-soft); color: var(--yb-brand); text-decoration: none; border: 0; cursor: pointer; font-size: 16px; transition: .2s; }
.yb-share a:hover, .yb-share button:hover { background: var(--yb-brand); color: #fff; transform: translateY(-2px); }
.yb-share button.is-done { background: #22c55e; color: #fff; }
.yb-related { margin-top: 56px; }
.yb-related h2 { text-align: center; color: var(--yb-ink); font-size: 24px; margin: 0; }

.yb-cta { margin-top: 72px; background: linear-gradient(135deg, #03338a, #1f5fd1 60%, #0ea5e9); color: #fff; text-align: center; padding: 56px 0; }
.yb-cta h2 { margin: 0 0 10px; font-size: clamp(22px, 3.4vw, 30px); font-weight: 800; }
.yb-cta p { margin: 0 auto 22px; max-width: 620px; opacity: .92; font-weight: 300; }
.yb-cta__btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.yb-foot { background: #0b1b44; color: rgba(255, 255, 255, .7); font-size: 14px; }
.yb-foot__in { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; padding-top: 22px; padding-bottom: 22px; }
.yb-foot__links { display: flex; gap: 16px; align-items: center; }
.yb-foot a { color: rgba(255, 255, 255, .85); text-decoration: none; }
.yb-foot a:hover { color: #fff; }
@media (prefers-reduced-motion: reduce) { *, *::before { transition: none !important; animation: none !important; } html { scroll-behavior: auto; } }
.yb-legal-other { text-align: center; margin: 28px 0 0; color: var(--yb-muted); font-size: 14px; }