/* ==========================================================================
   Mùa đông Thủ Đô — site.css (trang trong: bài viết, lưu trữ, tài khoản, tìm kiếm, 404…)
   ========================================================================== */

/* Page hero */
.mdtd-page-hero { position: relative; padding: clamp(32px, 5vw, 64px) 0 clamp(28px, 4vw, 48px); background: var(--g-dawn); overflow: hidden; isolation: isolate; border-bottom: 1px solid var(--c-line); }
.mdtd-page-hero__bg { position: absolute; inset: 0; z-index: -1; opacity: .45; pointer-events: none; }
.mdtd-page-hero__bg svg { width: 100%; height: 100%; object-fit: cover; }
.mdtd-page-hero--deep { background: var(--g-night); color: #E8F0F7; }
.mdtd-page-hero--deep h1 { color: #fff; }
.mdtd-page-hero__inner > * { max-width: 860px; }
.mdtd-page-hero__inner > .mdtd-breadcrumb { max-width: none; }
.mdtd-page-hero__title { margin-bottom: .35em; }
.mdtd-page-hero__desc { max-width: 640px; color: var(--c-muted); font-size: 1.1rem; }
.mdtd-page-hero--deep .mdtd-page-hero__desc { color: #C9DAEA; }
.mdtd-page-hero__meta { margin-top: 1rem; }
.mdtd-breadcrumb { margin-bottom: 1rem; font-size: .86rem; }
.mdtd-breadcrumb ol { display: flex; flex-wrap: wrap; gap: .25rem .5rem; list-style: none; margin: 0; padding: 0; color: var(--c-muted); }
.mdtd-breadcrumb li + li::before { content: '›'; margin-right: .5rem; opacity: .6; }
.mdtd-breadcrumb a { color: var(--c-muted); text-decoration: none; }
.mdtd-breadcrumb a:hover { color: var(--c-primary); text-decoration: underline; }
.mdtd-breadcrumb [aria-current] { color: var(--c-text); font-weight: 600; }

/* Bố cục có sidebar */
.mdtd-singular .mdtd-main, .mdtd-main { position: relative; }
.mdtd-layout { display: grid; gap: 2.5rem; }
@media (min-width: 1100px) { .mdtd-layout--sidebar { grid-template-columns: minmax(0, 1fr) 320px; align-items: start; } }
.mdtd-sidebar__sticky { display: grid; gap: 1.25rem; }
@media (min-width: 1100px) { .mdtd-sidebar__sticky { position: sticky; top: calc(var(--header-h) + 20px); } }
.mdtd-widget { padding: 1.25rem; border: 1px solid var(--c-line); border-radius: var(--r-md); background: var(--c-card); box-shadow: var(--sh-1); }
.mdtd-widget--accent { background: var(--g-night); border-color: transparent; color: #E8F0F7; }
.mdtd-widget--accent .mdtd-widget__title { color: #fff; }
.mdtd-widget__title { margin: 0 0 .85rem; font-size: 1.1rem; }
.mdtd-widget ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .6rem; }
.mdtd-mini-posts { display: grid; gap: .75rem; }
.mdtd-mini-post { display: flex; align-items: center; gap: .75rem; color: var(--c-text); text-decoration: none; }
.mdtd-mini-post__img { flex: none; width: 64px; height: 64px; border-radius: var(--r-sm); overflow: hidden; position: relative; }
.mdtd-mini-post__img.mdtd-media { aspect-ratio: 1; }
.mdtd-mini-post__body { display: flex; flex-direction: column; gap: .15rem; min-width: 0; font-size: .82rem; color: var(--c-muted); }
.mdtd-mini-post__title { font-weight: 600; font-size: .95rem; line-height: 1.35; color: var(--c-text); }
.mdtd-mini-post:hover .mdtd-mini-post__title { color: var(--c-primary); }
.mdtd-tagcloud { display: flex; flex-wrap: wrap; align-items: center; gap: .4rem; margin: 1rem 0; }
.mdtd-tagcloud__label { font-size: .88rem; font-weight: 600; margin-right: .25rem; }

/* Bài viết */
.mdtd-article { min-width: 0; }
.mdtd-cover { margin: 0 0 2rem; border-radius: var(--r-lg); overflow: hidden; box-shadow: var(--sh-2); }
.mdtd-prose { font-size: 1.08rem; line-height: 1.85; max-width: 760px; }
.mdtd-prose--lead > p:first-of-type { font-size: 1.22rem; color: var(--c-muted); }
.mdtd-prose > * + * { margin-top: 1.1em; }
.mdtd-prose h2 { margin-top: 2em; }
.mdtd-prose h3 { margin-top: 1.6em; }
.mdtd-prose img, .mdtd-prose figure { border-radius: var(--r-md); }
.mdtd-prose figcaption { margin-top: .5rem; font-size: .88rem; color: var(--c-muted); text-align: center; }
.mdtd-prose blockquote { margin: 1.8em 0; padding: 1.2rem 1.5rem; border-left: 4px solid var(--c-amber); border-radius: 0 var(--r-md) var(--r-md) 0; background: var(--c-tint); font-family: var(--f-serif); font-size: 1.25rem; font-style: italic; }
.mdtd-prose blockquote p:last-child { margin-bottom: 0; }
.mdtd-prose a { text-decoration: underline; }
.mdtd-prose ul, .mdtd-prose ol { padding-left: 1.4em; }
.mdtd-prose li + li { margin-top: .35em; }
.mdtd-prose code { padding: .1em .4em; border-radius: 6px; background: var(--c-tint2); font-size: .92em; }
.mdtd-prose pre { padding: 1rem; border-radius: var(--r-sm); background: #0F2F4F; color: #E8F0F7; overflow-x: auto; }
.mdtd-prose pre code { background: transparent; padding: 0; }
.mdtd-scroll { overflow-x: auto; margin: 1.4em 0; border: 1px solid var(--c-line); border-radius: var(--r-sm); }
.mdtd-scroll table { width: 100%; border-collapse: collapse; min-width: 480px; }
.mdtd-scroll th, .mdtd-scroll td { padding: .7rem 1rem; text-align: left; border-bottom: 1px solid var(--c-line); }
.mdtd-scroll th { background: var(--c-tint); font-weight: 700; }
.mdtd-callout { padding: 1.2rem 1.4rem; border-radius: var(--r-md); border: 1px solid var(--c-mist); background: var(--c-primary-soft); }
.mdtd-callout > :last-child { margin-bottom: 0; }
.mdtd-article__actions { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; margin: 1.5rem 0; }
.mdtd-article__foot { margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid var(--c-line); }
.mdtd-toc { margin: 0 0 2rem; padding: 1.1rem 1.3rem; border: 1px solid var(--c-line); border-radius: var(--r-md); background: var(--c-tint); max-width: 760px; }
.mdtd-toc summary { display: flex; justify-content: space-between; align-items: center; font-weight: 700; cursor: pointer; list-style: none; }
.mdtd-toc summary::-webkit-details-marker { display: none; }
.mdtd-toc__title { font-family: var(--f-serif); font-size: 1.1rem; }
.mdtd-toc ol { margin: .8rem 0 0; padding-left: 1.2em; display: grid; gap: .35rem; }
.mdtd-toc__l3 { margin-left: 1rem; font-size: .94em; list-style: circle; }
.mdtd-toc a { color: var(--c-text); text-decoration: none; }
.mdtd-toc a:hover, .mdtd-toc a.is-current { color: var(--c-primary); font-weight: 600; }
.mdtd-share { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; }
.mdtd-share__label { font-weight: 600; font-size: .9rem; margin-right: .25rem; }
.mdtd-share__status { font-size: .85rem; color: var(--c-ok); }
.mdtd-author-box { display: flex; gap: 1.1rem; align-items: flex-start; margin: 2rem 0; padding: 1.4rem; border: 1px solid var(--c-line); border-radius: var(--r-md); background: var(--c-tint); }
.mdtd-author-box__label { margin: 0; font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; color: var(--c-muted); font-weight: 700; }
.mdtd-author-box__name { margin: .1rem 0 .4rem; font-size: 1.2rem; }
.mdtd-author-box__name a { color: inherit; text-decoration: none; }
.mdtd-bio { margin: 0; color: var(--c-muted); font-size: .96rem; }
.mdtd-related { margin: 3rem 0 0; }
.mdtd-postnav { display: grid; gap: 1rem; margin: 2.5rem 0 0; }
@media (min-width: 680px) { .mdtd-postnav { grid-template-columns: 1fr 1fr; } }
.mdtd-postnav__item { display: flex; flex-direction: column; gap: .3rem; padding: 1.1rem 1.3rem; border: 1px solid var(--c-line); border-radius: var(--r-md); background: var(--c-card); color: var(--c-text); text-decoration: none; transition: transform .3s var(--ease), box-shadow .3s; }
.mdtd-postnav__item:hover { transform: translateY(-3px); box-shadow: var(--sh-2); color: var(--c-text); }
.mdtd-postnav__item--next { text-align: right; }
.mdtd-postnav__item small { color: var(--c-muted); font-weight: 600; }
.mdtd-postnav__item span { font-family: var(--f-serif); font-size: 1.1rem; }
.mdtd-places { display: flex; align-items: center; gap: .4rem; color: var(--c-primary-deep); font-weight: 600; }
.mdtd-transcript { margin: 2rem 0; border: 1px solid var(--c-line); border-radius: var(--r-md); background: var(--c-tint); }
.mdtd-transcript summary { padding: 1rem 1.3rem; font-weight: 700; cursor: pointer; }
.mdtd-transcript__body { padding: 0 1.3rem 1.2rem; color: var(--c-muted); }
.mdtd-facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: .75rem; margin: 1.5rem 0; }
.mdtd-facts > div { padding: .9rem 1rem; border: 1px solid var(--c-line); border-radius: var(--r-sm); background: var(--c-tint); }
.mdtd-facts dt { font-size: .76rem; letter-spacing: .06em; text-transform: uppercase; color: var(--c-muted); font-weight: 700; }
.mdtd-facts dd { margin: .2rem 0 0; font-weight: 600; }
.mdtd-photo-single { border-radius: var(--r-lg); overflow: hidden; box-shadow: var(--sh-3); margin-bottom: 1.5rem; }
.mdtd-attachment { text-align: center; }
.mdtd-clear-audio { margin-top: 1rem; }

/* Phân trang */
.mdtd-pagination { margin: 2.5rem 0 0; }
.mdtd-pagination ul, .mdtd-pagination .page-numbers { display: flex; flex-wrap: wrap; justify-content: center; gap: .4rem; list-style: none; margin: 0; padding: 0; }
.mdtd-pagination a, .mdtd-pagination span.page-numbers { display: inline-grid; place-items: center; min-width: 44px; min-height: 44px; padding: 0 .9rem; border: 1px solid var(--c-line); border-radius: var(--r-pill); background: var(--c-card); color: var(--c-text); text-decoration: none; font-weight: 600; }
.mdtd-pagination a:hover { border-color: var(--c-primary); color: var(--c-primary); }
.mdtd-pagination .current { background: var(--c-primary-deep); border-color: var(--c-primary-deep); color: #fff; }
.mdtd-pagination--inline { margin: 1.5rem 0; }

/* Tìm kiếm */
.mdtd-results { display: grid; gap: 1rem; list-style: none; margin: 0; padding: 0; }
.mdtd-result { padding: 1.2rem 1.4rem; border: 1px solid var(--c-line); border-radius: var(--r-md); background: var(--c-card); transition: transform .3s var(--ease), box-shadow .3s; }
.mdtd-result:hover { transform: translateY(-3px); box-shadow: var(--sh-2); }
.mdtd-result__type { display: inline-block; margin-bottom: .4rem; }
.mdtd-result__title { margin: 0 0 .3rem; font-size: 1.25rem; }
.mdtd-result__title a { color: var(--c-text); text-decoration: none; }
.mdtd-result__excerpt { margin: 0; color: var(--c-muted); }

/* 404 */
.mdtd-404 { text-align: center; padding-block: clamp(40px, 8vw, 100px); }
.mdtd-404__art { width: min(420px, 100%); margin: 0 auto 1.5rem; border-radius: var(--r-lg); overflow: hidden; }
.mdtd-404__art svg { width: 100%; height: auto; }
.mdtd-empty__title { margin-bottom: .4rem; }

/* A–Z thẻ */
.mdtd-az { display: flex; flex-wrap: wrap; gap: .35rem; margin-bottom: 2rem; }
.mdtd-az button { min-width: 40px; min-height: 40px; border: 1px solid var(--c-line); border-radius: var(--r-pill); background: var(--c-card); font-weight: 700; }
.mdtd-az button.is-active { background: var(--c-primary-deep); color: #fff; border-color: var(--c-primary-deep); }
.mdtd-az__group { margin-bottom: 1.75rem; }
.mdtd-az__letter { font-size: 2rem; color: var(--c-primary); margin: 0 0 .6rem; }
.mdtd-az__list { display: flex; flex-wrap: wrap; gap: .5rem; list-style: none; margin: 0; padding: 0; }

/* Liên hệ / bản đồ / giới thiệu */
.mdtd-contact { display: grid; gap: 2rem; }
@media (min-width: 960px) { .mdtd-contact { grid-template-columns: 1.3fr 1fr; align-items: start; } }
.mdtd-contact__side { display: grid; gap: 1rem; }
.mdtd-map { position: relative; border-radius: var(--r-md); overflow: hidden; border: 1px solid var(--c-line); aspect-ratio: 4 / 3; background: var(--c-tint2); }
.mdtd-map iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.mdtd-map__art { position: absolute; inset: 0; }
.mdtd-map__art svg { width: 100%; height: 100%; }
.mdtd-map__note { position: absolute; left: 0; right: 0; bottom: 0; display: flex; gap: .75rem; align-items: center; justify-content: space-between; padding: .8rem 1rem; background: var(--c-glass); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); font-size: .86rem; }
.mdtd-about { display: grid; gap: 2rem; }
.mdtd-card-plain { padding: 1.4rem; border: 1px solid var(--c-line); border-radius: var(--r-md); background: var(--c-card); }

/* Form-card (đăng nhập, tài khoản…) */
.mdtd-form-card { padding: clamp(20px, 4vw, 36px); border: 1px solid var(--c-line); border-radius: var(--r-lg); background: var(--c-card); box-shadow: var(--sh-2); margin-bottom: 1.5rem; }
.mdtd-form-card__title { margin: 0 0 .4rem; font-size: 1.5rem; }
.mdtd-form-card__lead { margin: 0 0 1.4rem; color: var(--c-muted); }
.mdtd-form-card__foot { margin: 1.2rem 0 0; text-align: center; font-size: .94rem; color: var(--c-muted); }
.mdtd-form-card--danger { border-color: rgba(179, 38, 30, .4); }
.mdtd-auth { padding-block: clamp(32px, 6vw, 80px); background: var(--g-dawn); }

/* Hồ sơ & tài khoản */
.mdtd-profile { display: flex; flex-wrap: wrap; gap: 1.4rem; align-items: center; }
.mdtd-profile__avatar { flex: none; }
.mdtd-profile__info { flex: 1; min-width: 220px; }
.mdtd-profile__name { margin: 0; }
.mdtd-profile__bio { margin: .4rem 0 0; color: var(--c-muted); max-width: 560px; }
.mdtd-profile__stats { display: flex; gap: 1.5rem; list-style: none; margin: .8rem 0 0; padding: 0; font-size: .92rem; color: var(--c-muted); }
.mdtd-profile__stats strong { color: var(--c-text); font-size: 1.15rem; margin-right: .25rem; }
.mdtd-tabs__list { display: flex; gap: .25rem; margin-bottom: 1.5rem; border-bottom: 1px solid var(--c-line); overflow-x: auto; }
.mdtd-tab { padding: .8rem 1.2rem; color: var(--c-muted); font-weight: 600; text-decoration: none; border-bottom: 3px solid transparent; white-space: nowrap; }
.mdtd-tab:hover { color: var(--c-text); }
.mdtd-tab.is-active { color: var(--c-primary-deep); border-bottom-color: var(--c-primary); }
.mdtd-usercomments { display: grid; gap: .9rem; list-style: none; margin: 0; padding: 0; }
.mdtd-usercomment { padding: 1rem 1.2rem; border: 1px solid var(--c-line); border-radius: var(--r-md); background: var(--c-card); }
.mdtd-usercomment__on { margin: 0 0 .3rem; font-size: .85rem; color: var(--c-muted); }
.mdtd-account-layout { display: grid; gap: 2rem; }
@media (min-width: 960px) { .mdtd-account-layout { grid-template-columns: 280px minmax(0, 1fr); align-items: start; } }
.mdtd-account-side { padding: 1.3rem; border: 1px solid var(--c-line); border-radius: var(--r-md); background: var(--c-card); }
@media (min-width: 960px) { .mdtd-account-side { position: sticky; top: calc(var(--header-h) + 20px); } }
.mdtd-account-side__me { display: flex; align-items: center; gap: .8rem; margin-bottom: 1rem; }
.mdtd-account-side__name { margin: 0; font-weight: 700; }
.mdtd-account-side__mail { margin: 0; font-size: .82rem; color: var(--c-muted); word-break: break-all; }
.mdtd-account-nav { list-style: none; margin: 0; padding: 0; display: grid; gap: .25rem; }
.mdtd-account-nav a { display: flex; align-items: center; gap: .6rem; padding: .7rem .9rem; border-radius: var(--r-sm); color: var(--c-text); text-decoration: none; font-weight: 500; }
.mdtd-account-nav a:hover, .mdtd-account-nav a.is-active { background: var(--c-primary-soft); color: var(--c-midnight); }
.mdtd-account-main { min-width: 0; }

/* Bình luận */
.mdtd-comments { margin-top: 3rem; max-width: 760px; }
.mdtd-comment-list, .mdtd-comment-list .children { list-style: none; margin: 0; padding: 0; }
.mdtd-comment-list .children { margin-left: clamp(12px, 4vw, 40px); padding-left: 1rem; border-left: 2px solid var(--c-line); }
.mdtd-comment { margin-top: 1rem; }
.mdtd-comment__body { display: flex; gap: .9rem; padding: 1.1rem 1.2rem; border: 1px solid var(--c-line); border-radius: var(--r-md); background: var(--c-card); }
.mdtd-comment__avatar { flex: none; }
.mdtd-comment__main { flex: 1; min-width: 0; }
.mdtd-comment__head { display: flex; flex-wrap: wrap; align-items: center; gap: .3rem .7rem; margin-bottom: .4rem; }
.mdtd-comment__name { font-weight: 700; }
.mdtd-comment__date { color: var(--c-muted); font-size: .82rem; text-decoration: none; }
.mdtd-comment__text p:last-child { margin-bottom: 0; }
.mdtd-comment__pending { padding: .4rem .8rem; border-radius: var(--r-sm); background: rgba(240, 165, 58, .18); font-size: .88rem; }
.mdtd-comment__actions { display: flex; align-items: center; gap: 1rem; margin-top: .6rem; font-size: .88rem; }
.mdtd-comment__like { display: inline-flex; align-items: center; gap: .35rem; min-height: 36px; padding: .2rem .7rem; border: 0; border-radius: var(--r-pill); background: var(--c-tint2); color: var(--c-muted); font-weight: 600; }
.mdtd-comment__like.is-liked { color: #D2453D; background: rgba(210, 69, 61, .12); }
.mdtd-comment__like.is-liked svg { fill: currentColor; }
.mdtd-comment__reply, .mdtd-comment__edit a { color: var(--c-link); font-weight: 600; text-decoration: none; }
.mdtd-comment-form { margin-top: 2rem; padding: 1.5rem; border: 1px solid var(--c-line); border-radius: var(--r-lg); background: var(--c-tint); }
.mdtd-comment-as { margin: 0 0 1rem; font-size: .92rem; color: var(--c-muted); }
.mdtd-comment-form .form-submit { margin: 0; }
.mdtd-comment-form input[type="submit"] { min-height: 48px; padding: .7em 1.8em; border: 0; border-radius: var(--r-pill); background: var(--g-brand); color: #fff; font-weight: 600; cursor: pointer; }
.mdtd-draft { font-size: .8rem; color: var(--c-muted); }

/* Đã lưu / dạng danh sách khác */
.mdtd-singular .mdtd-section { padding-block: clamp(32px, 5vw, 56px); }


/* ---- Sửa bố cục bài viết / danh sách / sidebar ---- */
.mdtd-cover { margin-top: clamp(20px, 3vw, 36px); }
.mdtd-single { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0 clamp(24px, 4vw, 56px); padding-block: clamp(24px, 4vw, 48px) clamp(40px, 6vw, 80px); }
.mdtd-single > .mdtd-toc, .mdtd-single > .mdtd-article { grid-column: 1; }
.mdtd-single > .mdtd-sidebar { grid-column: 1; margin-top: 3rem; }
@media (min-width: 1100px) {
	.mdtd-single { grid-template-columns: minmax(0, 1fr) 320px; align-items: start; }
	.mdtd-single > .mdtd-sidebar { grid-column: 2; grid-row: 1 / span 2; margin-top: 0; }
}
.mdtd-toc__details { max-width: 760px; }
.mdtd-share, .mdtd-share ul, .mdtd-social, .mdtd-tagcloud { align-items: center; }
.mdtd-share ul { display: flex; flex-wrap: wrap; gap: .25rem; list-style: none; margin: 0; padding: 0; }
.mdtd-share li { margin: 0; }
.mdtd-article__actions { justify-content: space-between; }
.mdtd-tagcloud .mdtd-pill { min-height: 34px; font-size: .85rem; }
.mdtd-postnav > div:only-child { grid-column: 1 / -1; }
.mdtd-comments { max-width: 760px; }
.mdtd-comments__title, .mdtd-comments .comment-reply-title { font-size: 1.5rem; margin: 0 0 1rem; }
.mdtd-comment-form { max-width: 760px; }
.mdtd-comment-form .mdtd-field { margin-bottom: 1rem; }
.mdtd-archive-grid { padding-block: clamp(28px, 4vw, 56px); }
.mdtd-page-hero + .mdtd-container, .mdtd-page-hero + .mdtd-section, .mdtd-page-hero + .mdtd-pad { padding-top: clamp(28px, 4vw, 56px); }