/* Bổ sung cho bản thương mại: điều hướng, chân trang, thẻ sản phẩm, hộp đăng nhập, trang nội dung. */
header.top .brand { text-decoration: none; color: inherit; }
.ten-tt { font: 700 24px/1.2 var(--serif); }
nav.menu { display: flex; gap: 4px 14px; flex-wrap: wrap; font-weight: 600; font-size: 14px; }
nav.menu a { color: var(--ink); text-decoration: none; padding: 6px 2px; border-bottom: 2px solid transparent; }
nav.menu a:hover, nav.menu a[aria-current] { border-bottom-color: var(--accent); }
footer.chan { margin-top: 40px; border-top: 1px solid var(--line); padding-top: 16px; font-size: 13.5px; color: var(--muted); }
footer.chan a { color: var(--muted); }
.chan-cot { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px 24px; margin-bottom: 10px; }
.hero { margin: 8px 0 18px; }
.hero h1 { font-size: clamp(26px, 4vw, 34px); }
.hero p { color: var(--muted); max-width: 70ch; }

.sp-luoi { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 14px; margin: 12px 0; }
.sp { background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: 16px; display: flex; flex-direction: column; gap: 8px; }
.sp.noi { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent) inset; }
.sp h3 { margin: 0; font-size: 18px; }
.sp .gia { font: 700 26px var(--serif); color: var(--accent); }
.sp ul { margin: 0; padding-left: 18px; font-size: 14px; }
.sp .mua { margin-top: auto; }
.khoa { position: relative; border: 1px dashed var(--line-strong); border-radius: 12px; padding: 16px; background: var(--paper); }
.khoa h3 { margin-top: 0; }
.khoa .mo { filter: blur(3px); user-select: none; pointer-events: none; color: var(--muted); }
.cta { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-top: 10px; }
a.nut, button.nut { display: inline-block; font: inherit; font-weight: 600; border-radius: 8px; padding: 10px 16px; cursor: pointer; border: 1px solid var(--accent); background: var(--accent); color: #fff; text-decoration: none; text-align: center; }
a.nut.phu, button.nut.phu { background: transparent; color: var(--accent); }
button.nut:disabled { opacity: .6; cursor: wait; }

dialog.hop { border: 1px solid var(--line); border-radius: 14px; background: var(--paper); color: var(--ink); padding: 20px; width: min(420px, calc(100vw - 32px)); }
dialog.hop::backdrop { background: rgb(0 0 0 / .45); }
dialog.hop h2 { margin: 0 0 8px; }
dialog.hop .f { margin: 10px 0; }
dialog.hop .dong-y { font-size: 13.5px; display: flex; gap: 8px; align-items: flex-start; }
dialog.hop .dong-y input { margin-top: 3px; }
.thong-bao { min-height: 1.4em; font-size: 14px; color: var(--accent); }
.thong-bao.ok { color: var(--good); }
.hoac { text-align: center; color: var(--muted); font-size: 13px; margin: 10px 0; }

.van-ban { max-width: 78ch; }
.van-ban h1 { margin: 10px 0 6px; font-size: 28px; }
.van-ban h2 { font-size: 19px; }
.van-ban li { margin: 4px 0; }
.bang-tuoi { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; }
.bang-tuoi a { display: block; background: var(--paper); border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; text-decoration: none; color: var(--ink); font-size: 14px; }
.bang-tuoi a b { display: block; }
.ket-qua-tuoi { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; margin: 14px 0; }
.ket-qua-tuoi .card b.lon { font: 700 20px var(--serif); display: block; margin: 4px 0; }
.don-ds .card { margin-bottom: 10px; }
.don-ds .dong { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; align-items: center; }
.kpi { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 10px; }
.kpi .card b { font: 700 24px var(--serif); display: block; }
.vi-du-pdf { width: 100%; max-width: 360px; border: 1px solid var(--line); border-radius: 8px; }
@media (max-width: 640px) { header.top { align-items: flex-start; } nav.menu { width: 100%; gap: 0 16px; } nav.menu a { padding: 8px 2px; } }
.sp .gia-goc { font-size: 16px; font-weight: 500; color: var(--muted); }
.sp .uu-dai { margin: 0; font-size: 13px; font-weight: 600; color: var(--accent); }
.ma-gt { max-width: 320px; margin: 4px 0 8px; }