/* Khung PUBLIC của lớp ÂY ZẦN (kiểu website học viện): thanh trên + footer + thẻ bài + lưới thành viên.
   Dùng cho /z4z (trang chủ), /z4z/thonayzan*, /z4z/ketqua*, /z4z/sukien, /z4z/thanhvien*.
   Nạp SAU shell.css (lấy biến màu, font, .btn). App học /z4z/hoc KHÔNG dùng file này. */
:root{--wrap:1180px}
body{font-size:17px}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
section{padding:64px 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px;flex-wrap:wrap}
.sec-head h2{font-size:1.9rem;font-weight:800;letter-spacing:-.01em}
.sec-head p{color:var(--ink-soft);margin:6px 0 0;max-width:62ch}
.sec-head .more{font-family:var(--font-head);font-weight:700;color:var(--accent-strong);text-decoration:none;white-space:nowrap}
.sec-head .more:hover{text-decoration:underline}
.pub-main{padding:34px 0 70px}
.pub-main .wrap{display:flex;flex-direction:column;gap:28px}
.crumb{display:flex;gap:6px;flex-wrap:wrap;font-size:.85rem;color:var(--ink-soft);font-family:var(--font-head);font-weight:600}
.crumb a{text-decoration:none}.crumb a:hover{color:var(--accent-strong)}

/* thanh trên */
.top{position:sticky;top:0;z-index:40;background:rgba(255,248,241,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:18px;height:68px}
.top .brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:inherit}
.top .brand .mk{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--accent),var(--brand-2));color:#fff;display:grid;place-items:center;font-family:var(--font-head);font-weight:800;font-size:.82rem;letter-spacing:-.03em;box-shadow:0 6px 16px rgba(251,106,21,.35)}
.top .brand b{font-family:var(--font-head);font-weight:800;font-size:1.05rem;display:block;line-height:1.05}
.top .brand small{color:var(--ink-soft);font-size:.7rem;font-weight:500}
.top nav{display:flex;gap:2px;margin-left:10px}
.top nav a{padding:9px 13px;border-radius:10px;text-decoration:none;color:var(--ink-soft);font-family:var(--font-head);font-weight:600;font-size:.92rem;white-space:nowrap}
.top nav a:hover{background:var(--surface-2);color:var(--ink)}
.top nav a.on{background:var(--accent-soft);color:var(--accent-strong)}
.top .acts{margin-left:auto;display:flex;gap:8px;align-items:center}
.top .btn{padding:10px 16px;font-size:.92rem}
.top .hv{display:none;align-items:center;gap:9px;text-decoration:none;color:inherit;background:var(--surface-2);border-radius:999px;padding:5px 14px 5px 5px;font-family:var(--font-head);font-weight:700;font-size:.9rem;white-space:nowrap}
.top .hv .av{width:30px;height:30px;border-radius:50%;background:linear-gradient(135deg,var(--brand-2),var(--accent));color:#fff;display:grid;place-items:center;font-size:.8rem}
.top .burger{display:none;background:none;border:1px solid var(--line);border-radius:10px;width:42px;height:42px;font-size:1.2rem;cursor:pointer}
.mmenu{display:none;background:var(--surface);border-bottom:1px solid var(--line);padding:10px 20px 16px}
.mmenu a{display:block;padding:11px 8px;text-decoration:none;font-family:var(--font-head);font-weight:600;color:var(--ink);border-bottom:1px solid var(--line)}
.mmenu.on{display:block}

/* thẻ bản tin, kết quả */
.btlist{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.btcard{display:flex;flex-direction:column;gap:9px;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:18px;box-shadow:var(--shadow);text-decoration:none;transition:border-color .15s,transform .1s}
.btcard:hover{border-color:var(--accent);transform:translateY(-2px)}
.btcard .no{font-family:var(--font-head);font-weight:700;font-size:.74rem;letter-spacing:.1em;text-transform:uppercase;color:var(--accent-strong)}
.btcard b,.btcard h3{font-family:var(--font-head);font-size:1.05rem;line-height:1.32;margin:0;font-weight:700;color:var(--ink)}
.btcard p{color:var(--ink-soft);font-size:.9rem;margin:0;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}
.btcard .more{color:var(--accent-strong);font-weight:700;font-family:var(--font-head);font-size:.85rem;margin-top:auto}
.btcard .faces{display:flex}
.btcard .faces img{width:34px;height:34px;border-radius:50%;object-fit:cover;border:2px solid #fff;margin-left:-8px;background:#fbd9bf;box-shadow:0 1px 3px rgba(0,0,0,.15)}
.btcard .faces img:first-child{margin-left:0}
.btcard .shots{display:grid;grid-template-columns:1fr 1fr;gap:6px;border-radius:12px;overflow:hidden}
.btcard .shots img{width:100%;height:120px;object-fit:cover;object-position:top;display:block;background:var(--surface-2)}
.btcard .shots img:only-child{grid-column:1/-1;height:160px}
.empty{color:var(--ink-soft);background:var(--surface);border:1px dashed var(--line);border-radius:14px;padding:22px;text-align:center}

/* lưới thành viên */
.tv-head{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-bottom:18px}
.tv-head input{flex:1;min-width:220px;border:1.5px solid var(--line);border-radius:12px;padding:12px 15px;font-size:1rem;font-family:inherit;background:var(--surface)}
.tv-head input:focus{outline:none;border-color:var(--accent)}
.tv-head .dem{font-family:var(--font-head);font-weight:700;color:var(--ink-soft);font-size:.9rem;white-space:nowrap}
.tv-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(112px,1fr));gap:14px 10px}
.tv{text-align:center;text-decoration:none;color:inherit;display:block}
.tv img,.tv .av{width:72px;height:72px;border-radius:50%;object-fit:cover;border:3px solid #fff;box-shadow:0 4px 12px rgba(120,40,0,.15);background:#fbd9bf;display:block;margin:0 auto 7px;transition:transform .15s}
.tv .av{display:grid;place-items:center;font-family:var(--font-head);font-weight:800;color:var(--accent-strong);font-size:1.3rem;background:var(--accent-soft)}
.tv:hover img,.tv:hover .av{transform:scale(1.08);border-color:var(--accent)}
.tv small{display:block;font-family:var(--font-head);font-weight:600;font-size:.76rem;line-height:1.2;color:var(--ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tv-more{display:flex;justify-content:center;gap:10px;margin-top:20px}
.tv-nhom{font-family:var(--font-head);font-size:1.12rem;font-weight:800;margin:30px 0 4px;display:flex;align-items:center;gap:8px}
.tv-nhom:first-of-type{margin-top:6px}
.tv-nhom span{font-size:.78rem;font-weight:700;color:var(--accent-strong);background:var(--accent-soft);border-radius:999px;padding:2px 10px}
.tv-sub{font-size:.88rem;margin:0 0 14px}
.tv-static{cursor:default}
.tv-static:hover img,.tv-static:hover .av{transform:none;border-color:#fff}
.mosaic{display:flex;flex-wrap:wrap;justify-content:center;gap:6px;max-height:330px;overflow:hidden;position:relative;-webkit-mask-image:linear-gradient(180deg,#000 70%,transparent);mask-image:linear-gradient(180deg,#000 70%,transparent)}
.mosaic.mo{max-height:none;-webkit-mask-image:none;mask-image:none}
.mosaic img{width:46px;height:46px;border-radius:50%;object-fit:cover;border:2px solid #fff;box-shadow:0 2px 6px rgba(120,40,0,.15);background:#fbd9bf;transition:transform .15s}
.mosaic img:hover{transform:scale(1.3);z-index:2}

/* trang một thành viên */
.tv-hero{display:flex;gap:24px;align-items:center;background:linear-gradient(135deg,var(--accent),var(--brand-2));color:#fff;border-radius:22px;padding:28px 30px;box-shadow:0 14px 32px rgba(251,106,21,.24);flex-wrap:wrap}
.tv-hero img,.tv-hero .av{width:128px;height:128px;border-radius:50%;object-fit:cover;border:5px solid rgba(255,255,255,.85);box-shadow:0 10px 24px rgba(120,40,0,.3);background:#fbd9bf;flex:none;display:grid;place-items:center;font-family:var(--font-head);font-weight:800;font-size:2.6rem;color:var(--accent-strong)}
.tv-hero h1{font-size:2rem;font-weight:800}
.tv-hero .eyebrow{color:rgba(255,255,255,.9)}
.tv-hero-bai h1{font-size:1.75rem;line-height:1.3}
.tv-hero-bai .eyebrow{font-size:1rem;font-weight:700;margin-bottom:8px}
.tv-hero-bai .byline{margin-top:10px;font-size:.9rem;opacity:.85}
.tv-hero p{margin:6px 0 0;color:rgba(255,255,255,.95)}
.tv-hero .chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.tv-hero .chips span{background:rgba(255,255,255,.2);border:1px solid rgba(255,255,255,.35);border-radius:999px;padding:5px 12px;font-family:var(--font-head);font-weight:700;font-size:.8rem}
.tv-bai{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:26px 30px;box-shadow:var(--shadow);max-width:860px}
.tv-bai h2{font-size:1.25rem;font-weight:800;margin-bottom:10px}
.tv-bai .nd{line-height:1.75}
.tv-bai .anh-phai{float:right;width:min(280px,42%);height:auto;border-radius:14px;margin:4px 0 16px 26px;box-shadow:0 10px 24px rgba(120,40,0,.18)}
.tv-bai .nd figure.xen{clear:both;margin:26px auto;max-width:640px;text-align:center}
.tv-bai figure.shot img{display:block;max-width:100%;height:auto;border-radius:12px;margin:0 auto}
.tv-bai .nd figure.xen figcaption{font-size:.88rem;color:var(--ink-soft);margin-top:6px}
@media (max-width:640px){.tv-bai .anh-phai{float:none;display:block;width:100%;max-width:360px;margin:0 auto 18px}}
.tv-bai::after{content:'';display:block;clear:both}
.tv-boanh{clear:both;display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:10px;margin-top:22px}
.tv-boanh img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:12px;display:block;border:1px solid var(--line)}
.tv-bai .tv-web{clear:both;margin:20px 0 0;padding-top:14px;border-top:1px dashed var(--line);font-size:.95rem}
.tv-bai .tv-web a{font-weight:700;color:var(--accent-strong);word-break:break-all}
.tv-bai .nd p{margin:0 0 1em}
.tv-bai .nd .tit{font-size:1.45rem;font-weight:800;line-height:1.3;margin:0 0 .9em}
.tv-bai .nd h3{font-size:1.1rem;font-weight:800;margin:1.4em 0 .5em}
.tv-bai .nd em{color:var(--ink-soft)}
.tv-bai .nd hr{border:0;border-top:1px solid var(--line);margin:1.4em 0}
.tv-bai .nd ul{margin:0 0 1em 1.2em}
.tv-bai .trong{color:var(--ink-soft)}
.pn{display:grid;grid-template-columns:1fr 1fr;gap:12px;max-width:860px}
.pn a{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:14px 16px;text-decoration:none;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:4px}
.pn a:hover{border-color:var(--accent)}
.pn a small{color:var(--ink-soft);font-family:var(--font-head);font-weight:700;font-size:.72rem;letter-spacing:.08em;text-transform:uppercase}
.pn a b{font-family:var(--font-head);font-size:.92rem;line-height:1.3;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.pn a.next{text-align:right;align-items:flex-end}

/* sự kiện */
.evlist{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:16px}
.evcard{background:var(--surface);border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column}
.evcard .anh{aspect-ratio:16/9;background:var(--surface-2);overflow:hidden}
.evcard .anh img{width:100%;height:100%;object-fit:cover;display:block}
.evcard .body{padding:16px 18px 18px;display:flex;gap:14px}
.evcard .d{flex:none;width:56px;text-align:center;background:var(--accent-soft);border-radius:12px;padding:8px 4px;font-family:var(--font-head)}
.evcard .d b{display:block;font-size:1.5rem;line-height:1;color:var(--accent-strong)}
.evcard .d span{font-size:.72rem;font-weight:700;color:var(--accent-strong)}
.evcard .gr{min-width:0;flex:1}
.evcard .gr b,.evcard .gr h3{font-family:var(--font-head);font-size:1.02rem;line-height:1.3;display:block;margin:0;font-weight:700}
.evcard .gr small{color:var(--ink-soft);display:block;margin-top:4px;font-size:.88rem}
.evcard .gr .meta{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px}
.evcard .gr .meta span{font-size:.72rem;font-weight:700;font-family:var(--font-head);padding:3px 9px;border-radius:999px;background:var(--surface-2);color:var(--ink-soft)}
.evcard.qua{opacity:.85}
.evcard.qua .d{background:var(--surface-2)}.evcard.qua .d b,.evcard.qua .d span{color:var(--ink-soft)}

/* footer */
footer.pub{background:#2A211A;color:rgba(255,255,255,.85);padding:40px 0 30px;font-size:.9rem}
footer.pub .wrap{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:28px}
footer.pub b{font-family:var(--font-head);color:#fff;display:block;margin-bottom:8px}
footer.pub a{color:rgba(255,255,255,.85);text-decoration:none;display:block;padding:3px 0}
footer.pub a:hover{color:var(--brand-2)}
footer.pub .logo{display:flex;align-items:center;gap:10px;margin-bottom:10px}
footer.pub .logo img{width:44px;height:44px;border-radius:10px;background:#fff;padding:3px;object-fit:contain}
footer.pub .copy{grid-column:1/-1;border-top:1px solid rgba(255,255,255,.15);padding-top:16px;color:rgba(255,255,255,.6);font-size:.82rem}
.joinbox{display:flex;align-items:center;gap:14px;background:var(--surface);border:1.5px solid #cfe0ff;border-radius:16px;padding:16px 18px;text-decoration:none;box-shadow:var(--shadow)}
.joinbox:hover{border-color:#0068ff}
.joins{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media (max-width:720px){.joins{grid-template-columns:1fr}}
.joinbox.fb{border-color:#d3e0fb}
.joinbox.fb:hover{border-color:#1877f2}
.joinbox.fb .ico{background:#1877f2}
.joinbox .ico{width:46px;height:46px;border-radius:12px;background:#0068ff;display:grid;place-items:center;flex:none}
.joinbox .ico svg{width:28px;height:28px}
.joinbox b{font-family:var(--font-head);display:block;font-size:1rem}
.joinbox small{color:var(--ink-soft);font-size:.86rem}
.foot{color:var(--ink-soft);font-size:.86rem;text-align:center;padding-top:8px}

@media (max-width:980px){
  footer.pub .wrap{grid-template-columns:1fr}
}
/* menu ngang dài (có "Cuộc thi thành quả") nên gập vào burger từ 1080px để không tràn ngang */
@media (max-width:1080px){
  .top nav{display:none}
  .top .burger{display:block}
}
@media (max-width:820px){
  /* mobile: Đăng nhập nằm cạnh Đăng ký trên thanh trên, cùng cỡ (thầy chốt 23/09) */
  .top .wrap{gap:10px}
  .top .acts{gap:6px}
  .top .btn{padding:9px 12px;font-size:.86rem}
  .top .btn,.top .brand b{white-space:nowrap}
  section{padding:44px 0}
  .pub-main{padding:20px 0 60px}
  .tv-grid{grid-template-columns:repeat(auto-fill,minmax(92px,1fr))}
  .tv img,.tv .av{width:62px;height:62px}
  .tv-hero{padding:22px 20px}
  .tv-hero h1{font-size:1.5rem}
  .tv-hero-bai h1{font-size:1.25rem}
  .tv-bai{padding:20px 18px}
  .pn{grid-template-columns:1fr}
}
@media (max-width:420px){
  .top .brand small{display:none}
  .top .brand{gap:8px}
  .top .brand .mk{width:36px;height:36px}
  .top .btn{padding:8px 10px;font-size:.82rem}
  .top .burger{width:38px;height:38px}
  .top .hv #hvTen{display:none}
  .top .hv{padding:5px}
}