/* Đầu trang dùng chung cho các trang con — khớp trang chủ Yoga Thuý An.
   Nạp SAU CSS riêng của từng trang nên ghi đè được. Sửa menu: sửa <header> ở từng trang + file này. */
header{
  --green-deep:#6E3A6F; --green-mid:#3E7A4C; --green-soft:#A8C9A0; --clay:#C2679A; --clay-soft:#D9F0DA;
  --ink:#1E241B; --line:#E4EAE1; --white:#FFFFFF; --bg-panel:#FAF1F6;
  position:sticky; top:0; z-index:50;
  background:rgba(255,255,255,0.94); backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
header nav.wrap{
  max-width:1180px; margin:0 auto; padding:0 32px; height:78px;
  display:flex; align-items:center; justify-content:space-between; flex-wrap:nowrap; gap:14px 20px;
}
header .brand{display:flex; align-items:center; gap:10px; min-width:0; text-decoration:none;}
header .brand-mark{width:52px; height:52px; flex-shrink:0;}
header .brand-mark img{width:100%; height:100%; object-fit:contain;}
header .brand-text{display:flex; flex-direction:column; gap:2px; min-width:0;}
header .brand-name{font-size:16.5px; font-weight:700; color:var(--green-deep); letter-spacing:0.02em; line-height:1.4; white-space:nowrap; overflow:visible;}
header .brand-tag{font-size:10px; font-weight:600; letter-spacing:.08em; text-transform:uppercase; color:var(--clay); white-space:nowrap;}

header .nav-links{display:flex; align-items:center; gap:26px; font-size:14.5px; font-weight:500; color:var(--ink); white-space:nowrap;}
header .nav-links > a{position:relative; padding:4px 0; opacity:.85; transition:opacity .2s;}
header .nav-links > a:hover{opacity:1;}
header .nav-links > a::after{content:''; position:absolute; left:0; right:0; bottom:-2px; height:1.5px; background:var(--clay); transform:scaleX(0); transform-origin:left; transition:transform .25s ease;}
header .nav-links > a:hover::after{transform:scaleX(1);}
header .nav-links a.nav-pill{
  background:var(--green-deep); color:var(--white); opacity:1;
  padding:10px 22px; border-radius:999px; font-size:14px; font-weight:600;
  transition:background .2s ease, transform .2s ease;
}
header .nav-links a.nav-pill::after{display:none;}
header .nav-links a.nav-pill:hover{background:var(--clay); transform:translateY(-1px);}

header .nav-item{position:relative; display:flex; align-items:center;}
header .nav-trigger{display:flex; align-items:center; gap:5px; background:none; border:none; cursor:pointer; padding:4px 0; font:inherit; color:inherit; opacity:.85; transition:opacity .2s;}
header .nav-trigger:hover{opacity:1;}
header .nav-trigger .caret{opacity:.65; transition:transform .25s ease;}
header .nav-item.open .nav-trigger .caret{transform:rotate(180deg);}
header .dropdown{
  position:absolute; top:calc(100% + 14px); left:50%; transform:translateX(-50%) translateY(-6px);
  background:var(--white); border:1px solid var(--line); border-radius:16px;
  box-shadow:0 24px 48px -24px rgba(30,60,40,0.45);
  padding:10px; min-width:260px; z-index:60;
  opacity:0; visibility:hidden; pointer-events:none;
  transition:opacity .2s ease, transform .2s ease, visibility .2s;
}
header .nav-item.open .dropdown{opacity:1; visibility:visible; pointer-events:auto; transform:translateX(-50%) translateY(0);}
header .dropdown a{display:flex; align-items:center; gap:10px; padding:10px 12px; border-radius:10px; font-size:14px; font-weight:500; color:var(--ink); opacity:1; transition:background .18s ease, color .18s ease;}
header .dropdown a:hover{background:var(--clay-soft); color:var(--green-deep);}
header .dropdown a::after{display:none;}
header .dd-dot{width:7px; height:7px; border-radius:50%; background:var(--clay); flex-shrink:0;}
header .dd-dot-free{background:var(--green-deep);}
header .dd-dot-vip{background:#D9A93F;}

header .nav-toggle{
  display:none; width:44px; height:44px; flex-shrink:0; align-items:center; justify-content:center;
  background:var(--white); border:1px solid var(--line); border-radius:12px; cursor:pointer; padding:0;
}
header .nav-toggle span{display:block; width:19px; height:1.8px; background:var(--green-deep); border-radius:2px; position:relative; transition:transform .28s ease, background .2s ease;}
header .nav-toggle span::before, header .nav-toggle span::after{content:''; position:absolute; left:0; width:19px; height:1.8px; background:var(--green-deep); border-radius:2px; transition:transform .28s ease, top .2s ease;}
header .nav-toggle span::before{top:-6px;}
header .nav-toggle span::after{top:6px;}
header .nav-toggle[aria-expanded="true"] span{background:transparent;}
header .nav-toggle[aria-expanded="true"] span::before{top:0; transform:rotate(45deg);}
header .nav-toggle[aria-expanded="true"] span::after{top:0; transform:rotate(-45deg);}

@media (max-width:1100px) and (min-width:961px){
  header .nav-links{gap:20px; font-size:14px;}
}
@media (max-width:960px){
  header .nav-toggle{display:flex;}
  header .nav-links{
    display:flex; flex-direction:column; align-items:stretch; gap:0;
    position:absolute; top:100%; left:0; right:0;
    background:var(--white); border-bottom:1px solid var(--line);
    box-shadow:0 24px 40px -28px rgba(30,60,40,0.5);
    padding:0 20px; max-height:0; overflow:hidden; opacity:0; visibility:hidden;
    transition:max-height .35s ease, opacity .25s ease, visibility .25s, padding .25s ease;
  }
  header .nav-links.open{max-height:80vh; overflow-y:auto; opacity:1; visibility:visible; padding:8px 20px 18px;}
  header .nav-links > a{padding:14px 4px; border-bottom:1px solid var(--line); font-size:15.5px; width:100%; opacity:1;}
  header .nav-links > a::after{display:none;}
  header .nav-links a.nav-pill{margin-top:14px; text-align:center; border-bottom:none; padding:13px 22px;}
  header .nav-item{flex-direction:column; align-items:stretch; padding:0; border-bottom:1px solid var(--line); width:100%;}
  header .nav-trigger{padding:14px 4px; width:100%; justify-content:space-between; font-size:15.5px; opacity:1;}
  header .dropdown{
    position:static; transform:none; opacity:1; visibility:visible; pointer-events:auto;
    border:none; box-shadow:none; padding:0 0 10px; min-width:0; background:transparent;
    max-height:0; overflow:hidden; transition:max-height .3s ease;
  }
  header .nav-item.open .dropdown{transform:none; max-height:520px;}
  header .dropdown a{padding:9px 12px; background:var(--bg-panel); margin-bottom:6px;}
}
@media (max-width:600px){
  header nav.wrap{padding:0 20px; height:70px;}
  header .brand-mark{width:44px; height:44px;}
  header .brand-name{font-size:14.5px;}
  header .brand-tag{display:none;}
}

footer .brand-name{overflow:visible; line-height:1.4;}

/* Nút Đăng nhập / Khoá học của tôi */
header .nav-links a.nav-login{border:1.5px solid var(--green-deep);color:var(--green-deep);opacity:1;padding:8px 18px;border-radius:999px;font-weight:600;font-size:14px}
header .nav-links a.nav-login::after{display:none}
header .nav-links a.nav-login:hover{background:var(--green-deep);color:#fff}
@media (max-width:960px){header .nav-links a.nav-login{margin-top:14px;text-align:center;padding:12px 22px;border-bottom:1.5px solid var(--green-deep)}}
/* Menu tài khoản (đã đăng nhập) */
header .nav-links .tk{position:relative}
header .nav-links .tk-btn{display:flex;align-items:center;gap:9px;background:#fff;border:1.5px solid var(--green-deep);color:var(--green-deep);border-radius:999px;padding:4px 14px 4px 4px;font:inherit;font-size:14px;font-weight:600;cursor:pointer}
header .nav-links .tk-btn:hover{background:var(--clay-soft)}
.tk-av{width:30px;height:30px;border-radius:50%;background:var(--green-deep);color:#fff;display:grid;place-items:center;font-size:12px;font-weight:700;flex:none}
.tk-name{max-width:130px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tk-btn .caret{transition:transform .2s}
.tk.open .tk-btn .caret{transform:rotate(180deg)}
.tk-menu{display:none;position:absolute;right:0;top:calc(100% + 10px);min-width:240px;background:#fff;border:1px solid rgba(30,92,59,.15);border-radius:16px;box-shadow:0 14px 40px rgba(20,60,40,.18);padding:8px;z-index:60}
.tk.open .tk-menu{display:block}
.tk-head{padding:10px 12px 12px;border-bottom:1px solid rgba(30,92,59,.12);margin-bottom:6px;display:flex;flex-direction:column;gap:2px}
.tk-head b{color:var(--green-deep);font-size:15px}
.tk-head span{font-size:13px;color:#6b7a70}
header .nav-links .tk-item{display:flex;align-items:center;gap:10px;width:100%;box-sizing:border-box;padding:10px 12px;border:0;background:none;border-radius:10px;color:#22332a;font:inherit;font-size:14.5px;font-weight:500;text-align:left;cursor:pointer;text-decoration:none;opacity:1}
header .nav-links .tk-item::after{display:none}
header .nav-links .tk-item:hover{background:var(--clay-soft)}
.tk-ic{width:22px;text-align:center}
.tk-out{color:#a33!important;border-top:1px solid rgba(30,92,59,.12);border-radius:0 0 10px 10px!important;margin-top:4px}
@media (max-width:960px){
  header .nav-links .tk{margin-top:14px}
  header .nav-links .tk-btn{width:100%;justify-content:flex-start}
  .tk-menu{position:static;box-shadow:none;border:0;padding:4px 0 0;min-width:0}
}

header .nav-links .tk-wrap{display:flex;align-items:center;gap:10px}
.tk-cart{position:relative;width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:#fff;border:1.5px solid var(--green-deep);color:var(--green-deep)!important;padding:0!important;opacity:1}
header .nav-links a.tk-cart::after{display:none}
.tk-cart:hover{background:var(--clay-soft)}
.tk-badge{position:absolute;top:-6px;right:-6px;min-width:18px;height:18px;padding:0 5px;border-radius:9px;background:#f97316;color:#fff;font-size:11px;font-weight:700;display:grid;place-items:center;box-sizing:border-box}
.tk-badge[hidden]{display:none}

header .nav-links a.tk-mine{white-space:nowrap}
.tk-bellbox{position:relative}
.tk-bell{cursor:pointer;font:inherit}
.tk-pop{position:absolute;right:0;top:calc(100% + 10px);min-width:220px;background:#fff;border:1px solid rgba(30,92,59,.15);border-radius:14px;box-shadow:0 14px 40px rgba(20,60,40,.18);padding:14px 16px;font-size:14px;color:#6b7a70;z-index:60}
.tk-pop[hidden]{display:none}
header .nav-links .tk-exit{border:1.5px solid rgba(30,92,59,.25);background:#fff;color:var(--green-deep);border-radius:999px;padding:8px 18px;font:inherit;font-size:14px;font-weight:600;cursor:pointer}
header .nav-links .tk-exit:hover{background:var(--clay-soft)}
@media (max-width:960px){
  header .nav-links .tk-wrap{flex-wrap:wrap;margin-top:14px}
  header .nav-links .tk-wrap .tk{flex:1 1 100%;order:-1;margin-top:0}
  .tk-pop{right:auto;left:0}
}

@media (min-width:961px){header .nav-links.tk-on .nav-pill{display:none}header .nav-links.tk-on{gap:16px}}


@media (min-width:961px){header .nav-links.tk-on{margin-left:28px}}
.tk-av{object-fit:cover}
.tk-poplink{color:var(--green-deep);font-weight:600;font-size:13px}

/* cầu nối vô hình giữa nút và menu xổ xuống: rê chuột xuống không bị đóng giữa chừng */
@media (min-width:961px){header .dropdown::before{content:'';position:absolute;left:0;right:0;top:-18px;height:18px}}

header .nav-links a.tk-admin{background:var(--green-deep);color:#fff!important;opacity:1;border-radius:999px;padding:8px 16px;font-size:14px;font-weight:600;white-space:nowrap}
header .nav-links a.tk-admin::after{display:none}
header .nav-links a.tk-admin:hover{background:var(--green-mid)}

/* giãn đều các mục trên thanh menu */
@media (min-width:1200px){header .nav-links{gap:38px}header .nav-links.tk-on{gap:30px}header .nav-links .tk-wrap{gap:12px}}
@media (min-width:961px) and (max-width:1199px){header .nav-links{gap:26px}header .nav-links.tk-on{gap:20px}}