/* =====================================================================
   extra.css — phần bổ sung (tải sau style.css, không ghi đè file của bạn)
   Nút sáng/tối · xem trước · ảnh tiêu đề gọn · nội dung bài · trang 404
   ===================================================================== */

/* ---- Nút chuyển giao diện sáng / tối ---- */
.ears-r{display:inline-flex;align-items:center;gap:12px}
.theme-btn{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;margin:-6px 0;padding:0;border:2px solid var(--ink);border-radius:50%;background:transparent;color:var(--ink);font:400 17px/1 'Noto Sans Symbols 2','Segoe UI Symbol',sans-serif;cursor:pointer;transition:transform .4s cubic-bezier(.2,.8,.2,1),background .2s,color .2s}
.theme-btn:hover{background:var(--ink);color:var(--paper);transform:rotate(35deg)}
.theme-btn:focus-visible{outline:3px solid var(--red);outline-offset:2px}

/* ---- Dải báo "xem trước" ---- */
.preview-banner{position:sticky;top:0;z-index:70;padding:10px 16px;text-align:center;background:var(--red);color:#fff;font-family:var(--cond);font-weight:600;font-size:14px;letter-spacing:.14em;text-transform:uppercase;box-shadow:0 3px 0 var(--ink)}
.preview-banner b{background:#fff;color:var(--red);padding:2px 8px;margin-right:6px}

/* ---- Ảnh tiêu đề trong bài: gọn lại, không chiếm cả màn hình ---- */
.art-cover{max-width:760px;margin:28px auto 0}
.art-cover img{display:block;width:100%;height:auto;aspect-ratio:16/9;max-height:min(46vh,420px);object-fit:cover;box-shadow:12px 12px 0 var(--red)}
@media (max-width:640px){
  .art-cover{margin-top:22px}
  .art-cover img{aspect-ratio:4/3;max-height:300px;box-shadow:8px 8px 0 var(--red)}
}

/* ---- Nội dung bài: ảnh canh lề, chú thích, video, bảng ---- */
.art-body figure{margin:1.8em 0}
.art-body figcaption{margin-top:8px;text-align:center;font-family:var(--mono);font-size:12.5px;letter-spacing:.06em;line-height:1.5;color:var(--brown)}
.art-body figure.align-left{float:left;width:min(46%,340px);margin:.3em 1.6em 1em 0}
.art-body figure.align-right{float:right;width:min(46%,340px);margin:.3em 0 1em 1.6em}
.art-body figure.align-center{max-width:560px;margin-left:auto;margin-right:auto}
.art-body figure.wide{position:relative;left:50%;width:min(960px,calc(100vw - 36px));transform:translateX(-50%)}
.art-body figure.align-left img,.art-body figure.align-right img{margin:0;width:100%}
.art-body::after{content:"";display:block;clear:both}
.art-body figure.video{position:relative;aspect-ratio:16/9}
.art-body figure.video iframe{position:absolute;inset:0;width:100%;height:100%;border:3px solid var(--ink);background:#000}
.art-body table{display:block;width:100%;max-width:100%;overflow-x:auto;border-collapse:collapse;margin:1.6em 0;font-size:.92em;line-height:1.5}
.art-body th,.art-body td{padding:9px 12px;border:1px solid var(--ink);text-align:left;vertical-align:top}
.art-body th{background:var(--paper-2);font-family:var(--cond);font-weight:600;letter-spacing:.08em;text-transform:uppercase}
@media (max-width:640px){
  .art-body figure.align-left,.art-body figure.align-right{float:none;width:auto;margin:1.6em 0}
  .art-body figure.wide{left:0;width:auto;transform:none}
}

/* ---- Trang lỗi 404 ---- */
.nf{text-align:center;padding-top:clamp(28px,5vw,56px);padding-bottom:clamp(48px,7vw,96px)}
.nf-num{display:flex;align-items:center;justify-content:center;gap:clamp(6px,2vw,22px);margin-bottom:18px;font-family:var(--display);font-weight:900;font-size:clamp(110px,26vw,280px);line-height:.9;color:var(--ink);text-shadow:5px 5px 0 var(--head-shadow),10px 10px 0 rgba(215,154,33,.4)}
.nf-num i{display:inline-block;font-style:normal;color:var(--red);animation:spin 18s linear infinite}
.nf-actions{justify-content:center;margin-top:8px}
.nf-cats{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;padding:26px 0 8px}
.nf-head{margin-top:clamp(36px,6vw,64px)}
.nf .cards{text-align:left}

/* ---- Tìm kiếm trong trang ---- */
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.nav-search{display:flex;justify-content:center;gap:0;margin:0 0 6px;padding:10px 0 2px}
.nav-search input{width:min(360px,64vw);height:40px;padding:0 12px;border:2px solid var(--ink);border-right:0;border-radius:0;background:var(--paper);color:var(--ink);font:400 16px var(--body);-webkit-appearance:none}
.nav-search input:focus{outline:3px solid var(--red);outline-offset:-3px}
.nav-search button{height:40px;padding:0 16px;border:2px solid var(--ink);background:var(--ink);color:var(--paper);font:600 14px var(--cond);letter-spacing:.16em;text-transform:uppercase;cursor:pointer}
.nav-search button:hover{background:var(--red);border-color:var(--red)}
.search-big{display:flex;max-width:640px;margin:22px auto 0}
.search-big input{flex:1;min-width:0;height:52px;padding:0 14px;border:3px solid var(--ink);border-right:0;border-radius:0;background:var(--paper);color:var(--ink);font:400 18px var(--body)}
.search-big .btn{border-radius:0;cursor:pointer}
.search-note{text-align:center;margin:18px 0 0;font-style:italic;color:var(--brown)}

/* ---- Thẻ, thời gian đọc, chia sẻ, bài trước/sau ---- */
.art-meta .read-min,.art-meta .upd{white-space:nowrap}
.art-tags{max-width:760px;margin:30px auto 0;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.art-tags-l{font:600 13px var(--cond);letter-spacing:.16em;text-transform:uppercase;color:var(--brown)}
.tagchip{display:inline-block;padding:4px 12px;border:2px solid var(--ink);font:400 14px var(--mono);text-decoration:none;color:var(--ink);transition:background .2s,color .2s}
.tagchip:hover{background:var(--ink);color:var(--paper)}
.share{max-width:760px;margin:26px auto 0;display:flex;flex-wrap:wrap;gap:10px;align-items:center;padding:14px 0;border-top:2px solid var(--ink);border-bottom:2px solid var(--ink)}
.share-l{font:600 13px var(--cond);letter-spacing:.16em;text-transform:uppercase;color:var(--brown);margin-right:4px}
.share-b{display:inline-flex;align-items:center;min-height:40px;padding:0 16px;border:2px solid var(--ink);background:transparent;color:var(--ink);font:600 14px var(--cond);letter-spacing:.12em;text-transform:uppercase;text-decoration:none;cursor:pointer}
.share-b:hover{background:var(--ink);color:var(--paper)}
.share-b.fb:hover{background:#1877F2;border-color:#1877F2;color:#fff}
.share-b.zalo:hover{background:#0068FF;border-color:#0068FF;color:#fff}
.share-msg{flex-basis:100%;min-height:1.2em;font-size:14px;font-style:italic;color:var(--brown)}
.post-nav{max-width:760px;margin:30px auto 0;display:grid;grid-template-columns:1fr 1fr;gap:16px}
.pn{display:flex;flex-direction:column;gap:6px;padding:14px 16px;border:2px solid var(--ink);text-decoration:none;color:var(--ink);transition:transform .2s,box-shadow .2s}
.pn:hover{transform:translate(-3px,-3px);box-shadow:5px 5px 0 var(--red)}
.pn.next{text-align:right;grid-column:2}
.pn-k{font:600 12px var(--cond);letter-spacing:.18em;text-transform:uppercase;color:var(--red)}
.pn-t{font:700 17px/1.3 var(--display)}
@media (max-width:640px){.post-nav{grid-template-columns:1fr}.pn.next{grid-column:auto}.nav-search input{width:60vw}}

/* ---- Ảnh tiêu đề bấm để xem đầy đủ ---- */
.art-cover a[data-zoom]{position:relative;display:block;cursor:zoom-in}
.zoom-hint{position:absolute;right:12px;bottom:12px;padding:6px 12px;background:rgba(20,10,4,.78);color:#fff;font:600 12px var(--cond);letter-spacing:.14em;text-transform:uppercase;pointer-events:none}
.art-body img{cursor:zoom-in}
.lb{position:fixed;inset:0;z-index:200;background:rgba(10,5,2,.94);overflow:hidden;touch-action:none;display:flex;align-items:center;justify-content:center}
.lb-img{max-width:96vw;max-height:94vh;width:auto;height:auto;object-fit:contain;transform-origin:center center;user-select:none;-webkit-user-drag:none;touch-action:none;will-change:transform}
.lb-bar{position:fixed;top:12px;right:12px;display:flex;gap:8px;z-index:2}
.lb-bar button{min-width:44px;height:44px;border:2px solid #EADDBB;background:rgba(20,10,4,.7);color:#EADDBB;font:600 20px/1 var(--cond);cursor:pointer}
.lb-bar button:hover,.lb-bar button:focus-visible{background:#EADDBB;color:#2A170D;outline:none}
.lb-hint{position:fixed;left:0;right:0;bottom:12px;text-align:center;color:#EADDBB;font:400 13px var(--mono);opacity:.75;pointer-events:none;padding:0 12px}
.lb-load{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);color:#EADDBB;font:400 14px var(--mono)}

/* ---- Logo trong đầu trang ---- */
.mast-link.has-logo{padding:2px 0}
.mast-logo{display:block;width:auto;height:auto;max-width:100%;max-height:clamp(64px,16vw,168px)}

/* ---- Mục lục tự động của bài dài ---- */
.art-toc{max-width:720px;margin:34px auto 0}
.art-toc details{border:3px double var(--ink);background:var(--paper-2);padding:0 20px}
.art-toc summary{display:flex;align-items:baseline;gap:12px;padding:14px 0;cursor:pointer;list-style:none;font:700 15px var(--cond);letter-spacing:.22em;text-transform:uppercase}
.art-toc summary::-webkit-details-marker{display:none}
.art-toc summary::after{content:"▾";margin-left:auto;font-size:16px;color:var(--red);transition:transform .2s}
.art-toc details:not([open]) summary::after{transform:rotate(-90deg)}
.art-toc summary small{font:400 12px var(--mono);letter-spacing:.08em;text-transform:none;color:var(--brown)}
.art-toc summary:focus-visible{outline:3px solid var(--red);outline-offset:2px}
.art-toc ol{margin:0;padding:0 0 14px 1.5em;list-style:decimal;font-family:var(--display);font-weight:700;font-size:17px;line-height:1.35}
.art-toc ol ol{padding:4px 0 2px 1.3em;list-style:lower-alpha;font-family:var(--body);font-weight:400;font-size:16px}
.art-toc li{margin:.35em 0;padding-left:.2em}
.art-toc li::marker{color:var(--red);font-family:var(--mono);font-size:.8em}
.art-toc a{color:var(--ink);text-decoration:none;background:linear-gradient(var(--red),var(--red)) 0 100%/0 2px no-repeat;transition:background-size .25s,color .2s}
.art-toc a:hover{color:var(--red);background-size:100% 2px}
.art-body h2[id],.art-body h3[id]{scroll-margin-top:20px}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}


/* ---- Mục "Xem tử vi" ---- */
.nav a.nav-tuvi{color:var(--red)}
.nav a.nav-tuvi::before{content:"☯ ";display:inline-block}
.nav a.nav-tuvi.on{color:var(--paper)}
.tuvi-cta{padding-top:clamp(26px,5vw,48px);padding-bottom:clamp(8px,2vw,20px)}
.tuvi-cta-in{display:flex;flex-wrap:wrap;align-items:center;gap:20px 28px;padding:clamp(18px,3vw,30px) clamp(18px,3vw,36px);border:3px solid var(--ink);background:var(--deep);color:var(--on-deep);box-shadow:9px 9px 0 var(--red)}
.tuvi-cta-ico{flex:none;display:flex;align-items:center;justify-content:center;width:74px;height:74px;border:3px solid var(--gold);border-radius:50%;font-size:46px;line-height:1;color:var(--gold);animation:spin 24s linear infinite}
.tuvi-cta-tx{flex:1 1 280px;min-width:0}
.tuvi-cta-tx .mono-kick{color:var(--gold)}
.tuvi-cta-tx h2{margin:4px 0 6px;font-family:var(--display);font-weight:900;font-size:clamp(24px,4vw,36px);line-height:1.15}
.tuvi-cta-tx p{margin:0;color:var(--on-deep-2);font-size:17px}
.tuvi-cta .btn{background:var(--gold);color:#2A170D;box-shadow:5px 5px 0 var(--red)}


/* ---- Mục "Hôm nay" và dải ngày hôm nay ---- */
.nav a.nav-homnay{color:var(--ink)}
.nav a.nav-homnay::before{content:"☼ ";display:inline-block;color:var(--red)}
.nav a.nav-homnay.on{color:var(--paper)}
.nav a.nav-homnay.on::before{color:var(--gold)}
.hb-today-wrap{padding-top:clamp(14px,2.4vw,24px)}
.hb-today{min-height:78px}
.hb-today-in{display:flex;align-items:center;gap:clamp(12px,2.4vw,24px);padding:12px clamp(14px,2.4vw,24px);border:3px solid var(--ink);border-left-width:12px;border-left-color:var(--gold);background:var(--paper-2);box-shadow:6px 6px 0 var(--red);color:var(--ink);text-decoration:none;transition:transform .2s,box-shadow .2s}
.hb-today-in.is-hoang{border-left-color:#2E7A3C}
.hb-today-in.is-hac{border-left-color:#B5391A}
.hb-today-in:hover{transform:translate(-3px,-3px);box-shadow:9px 9px 0 var(--red)}
.hb-t-date{flex:none;display:flex;flex-direction:column;align-items:center;min-width:64px;line-height:1}
.hb-t-date b{font-family:var(--display);font-weight:900;font-size:clamp(34px,5vw,46px);color:var(--red)}
.hb-t-date small{margin-top:3px;font:700 11px var(--cond);letter-spacing:.18em;text-transform:uppercase;color:var(--brown)}
.hb-t-main{flex:1;min-width:0;display:flex;flex-direction:column;gap:3px}
.hb-t-main strong{font-family:var(--display);font-weight:800;font-size:clamp(16px,2.4vw,21px);line-height:1.25}
.hb-t-main em{font-style:normal;font-size:15px;line-height:1.45;color:var(--brown)}
.hb-t-cta{flex:none;font:700 14px var(--cond);letter-spacing:.18em;text-transform:uppercase;color:var(--red);white-space:nowrap}
@media (max-width:640px){.hb-t-cta{display:none}.hb-today-in{border-left-width:9px}}