/* Khung nhiều trang: nav · page-hero · breadcrumb · footer · chuyển trang.
   Bổ sung cho tokens.css + app.css. */

/* Chuyển trang mượt giữa các trang (Chrome hỗ trợ), nơi khác thì bỏ qua êm */
@view-transition{ navigation: auto; }
.noi{ animation: trang-vao .5s var(--ra) both; }
@keyframes trang-vao{ from{ opacity: 0; transform: translateY(10px); } }
@media (prefers-reduced-motion: reduce){ .noi{ animation: none; } }

/* ══ Thanh điều hướng ══ */
.nav{ position: sticky; top: 0; z-index: 50; background: rgba(244,249,253,.86);
  backdrop-filter: blur(14px); border-bottom: 1px solid var(--ke); }
.nav-in{ max-width: 1200px; margin: 0 auto; padding: 11px 26px; display: flex; align-items: center; gap: 16px; }
.nav-logo{ display: flex; align-items: center; gap: 11px; text-decoration: none; color: var(--muc); }
.nav-logo img{ width: 42px; height: 42px; border-radius: 50%; box-shadow: 0 0 0 1px var(--ke); }
.nav-logo b{ font-family: var(--hien); font-weight: 800; font-size: 15px; line-height: 1.1; letter-spacing: -.01em; }
.nav-logo b span{ display: block; font-family: var(--mono); font-weight: 500; font-size: 10.5px;
  letter-spacing: .12em; text-transform: uppercase; color: var(--muc-3); }
.nav-menu{ margin-left: auto; display: flex; gap: 3px; }
.nav-menu a{ position: relative; font-size: 14px; font-weight: 600; color: var(--muc-2);
  padding: 8px 14px; border-radius: 100px; transition: .2s; }
.nav-menu a:hover{ color: var(--xanh-sau); background: var(--xanh-mo); }
.nav-menu a.dang{ color: var(--xanh-sau); }
.nav-menu a.dang::after{ content: ""; position: absolute; left: 14px; right: 14px; bottom: 2px; height: 2px;
  border-radius: 2px; background: var(--gr-xanh); }
.nav-auth{ display: flex; align-items: center; gap: 8px; }
.nav-dnhap{ font-size: 14px; font-weight: 600; color: var(--muc-2); padding: 8px 12px; border-radius: 100px; transition: .2s; }
.nav-dnhap:hover{ color: var(--xanh-sau); background: var(--xanh-mo); }
.nav-dn-ten{ display: inline-flex; align-items: center; gap: 8px; font-size: 13.5px; font-weight: 600; color: var(--xanh-950);
  padding: 6px 8px 6px 12px; border-radius: 100px; background: var(--xanh-mo); border: 1px solid var(--xanh-vien); text-decoration: none; max-width: 240px; }
.nav-dn-ten b{ overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nav-dn-ten .av{ width: 26px; height: 26px; border-radius: 50%; background: var(--gr-xanh); color: #fff; display: grid; place-items: center;
  font-family: var(--han); font-weight: 800; font-size: 12px; flex: none; }
.nav-out{ width: 34px; height: 34px; border-radius: 50%; border: 1px solid var(--ke-dam); background: var(--trang); color: var(--muc-2);
  display: grid; place-items: center; cursor: pointer; transition: .2s; flex: none; }
.nav-out:hover{ border-color: #F3C9C5; color: #B4231C; background: #FBE9E9; }
.nav-thu-auth{ display: flex; flex-direction: column; gap: 8px; margin-top: 6px; padding-top: 8px; border-top: 1px solid var(--ke); }
.nav-mo{ display: none; margin-left: auto; width: 42px; height: 42px; border: none; background: none;
  cursor: pointer; flex-direction: column; gap: 5px; align-items: center; justify-content: center; }
.nav-mo span{ width: 22px; height: 2px; background: var(--muc); border-radius: 2px; transition: .25s var(--ra); }
.nav-mo[aria-expanded="true"] span:nth-child(1){ transform: translateY(7px) rotate(45deg); }
.nav-mo[aria-expanded="true"] span:nth-child(2){ opacity: 0; }
.nav-mo[aria-expanded="true"] span:nth-child(3){ transform: translateY(-7px) rotate(-45deg); }
.nav-thu{ display: none; flex-direction: column; gap: 4px; padding: 8px 18px 18px; }
.nav-thu a{ font-size: 15.5px; font-weight: 600; color: var(--muc); padding: 11px 12px; border-radius: 10px; }
.nav-thu a:hover{ background: var(--xanh-mo); }
.nav-thu .nut{ margin-top: 8px; }
@media (max-width: 860px){
  .nav-menu, .nav-dang{ display: none; }
  .nav-mo{ display: flex; }
  .nav.mo .nav-thu{ display: flex; }
}

/* ══ Dải tiêu đề trang (page hero) ══ */
.ph{ position: relative; overflow: hidden; padding: 46px 0 40px; background: var(--xanh-mo); }
.ph-cam{ background: var(--cam-mo); }
.ph-net{ position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background:
    radial-gradient(40vw 30vw at 88% -20%, rgba(0,180,240,.22), transparent 60%),
    radial-gradient(30vw 24vw at 100% 120%, rgba(245,138,0,.16), transparent 60%); }
.ph-cam .ph-net{ background:
    radial-gradient(40vw 30vw at 88% -20%, rgba(245,138,0,.22), transparent 60%),
    radial-gradient(30vw 24vw at 100% 120%, rgba(0,180,240,.14), transparent 60%); }
.ph h1{ font-size: clamp(30px,4.2vw,50px); margin: 12px 0 0; letter-spacing: -.03em; }
.ph-dan{ color: var(--muc-2); font-size: 17px; margin: 14px 0 0; max-width: 66ch; }

/* ══ Breadcrumb ══ */
.vun{ display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-size: 13px; margin-bottom: 4px; }
.vun a{ color: var(--muc-3); font-weight: 600; }
.vun a:hover{ color: var(--xanh-sau); }
.vun span{ color: var(--ke-dam); }
.vun b{ color: var(--muc-2); font-weight: 600; }

/* ══ Chân trang ══ */
.chan{ background: var(--xanh-950); color: #C7DCEC; margin-top: 20px;
  padding: 54px 0 26px; position: relative; }
.chan::before{ content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--xanh-sang), var(--cam)); }
.chan-dinh{ display: flex; gap: 16px; align-items: flex-start; padding: 20px 22px; border-radius: var(--r);
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.09); margin-bottom: 40px; }
.chan-dinh svg{ color: var(--xanh-sang); flex: none; margin-top: 2px; }
.chan-dinh p{ margin: 0; font-size: 15px; line-height: 1.6; color: #D6E6F2; }
.chan-dinh b{ color: #fff; } .chan-dinh b.cam{ color: var(--cam-sang); } .chan-dinh b.xanh{ color: var(--xanh-sang); }
.chan-luoi{ display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 30px; }
.chan-th .nav-logo.sang b{ color: #fff; } .chan-th .nav-logo.sang b span{ color: var(--xanh-sang); }
.chan-th p{ font-size: 14px; color: #A9C4D8; margin: 14px 0 0; max-width: 42ch; }
.chan-cot{ display: flex; flex-direction: column; gap: 10px; }
.chan-nhan{ font-family: var(--mono); font-size: 11px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--xanh-sang); margin: 0 0 6px; display: flex; align-items: center; gap: 8px; }
.chan-nhan::before{ content: ""; width: 18px; height: 2px; background: var(--gr-xanh); border-radius: 2px; }
.chan-cot a{ color: #C7DCEC; font-size: 14.5px; transition: .2s; width: fit-content; }
.chan-cot a:hover{ color: #fff; transform: translateX(3px); }
.chan-zalo{ display: inline-flex; align-items: center; gap: 7px; margin-top: 6px; color: var(--cam-sang) !important;
  font-weight: 600; }
.chan-day{ display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  margin-top: 34px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.1); font-size: 13px; color: #8FAEC4; }
.chan-ghi{ font-family: var(--mono); }
@media (max-width: 760px){ .chan-luoi{ grid-template-columns: 1fr; gap: 24px; } .chan-dinh p{ font-size: 14px; } }

/* ══ Nút quay lên / lưới trang ══ */
.trang-luoi{ padding: 56px 0; }
.chi-tiet{ padding: 40px 0 56px; }