/* Framebloom — trang công khai. Một file CSS dùng chung cho mọi trang.
   Thế giới hình: bàn dựng phim. Khối tối (mực) là nơi chiếu hình; phần đọc nền sáng; hổ phách là màu thương hiệu của app. */
:root {
  --muc: #13202a;        /* mực: nền vùng chiếu hình, chữ trên nền sáng */
  --muc-2: #1d2d39;      /* mực nâng: khung trong vùng tối */
  --muc-vien: #2f4250;
  --nen: #f3f5f6;        /* nền đọc */
  --trang: #ffffff;
  --chu: #13202a;
  --chu-phu: #4c5c68;    /* 6.4:1 trên --nen */
  --vien: #d5dce1;
  --ho-phach: #f0a640;   /* màu thương hiệu, nút chính (chữ mực) */
  --ho-phach-dam: #8a4e00; /* chữ nhấn trên nền sáng, 6.3:1 */
  --toi-chu: #eef2f4;
  --toi-phu: #a9b8c3;    /* 7.9:1 trên --muc */
  --xanh: #2e7d5b;       /* trạng thái ổn */
  --do: #b3261e;         /* lỗi */
  --bo: 14px;
  --bo-nho: 8px;
  --rong: 1160px;
  --le: 16px;
  --font-tieu-de: "Bricolage Grotesque", "Be Vietnam Pro", system-ui, sans-serif;
  --font-chu: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", sans-serif;
  color-scheme: light;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 76px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--nen); color: var(--chu); font: 400 16px/1.65 var(--font-chu); text-rendering: optimizeLegibility; }
@media (min-width: 900px) { body { font-size: 17px; } }
img, video, svg { display: block; max-width: 100%; }
::selection { background: var(--ho-phach); color: var(--muc); }
a { color: inherit; text-decoration-color: var(--ho-phach); text-decoration-thickness: 2px; text-underline-offset: 3px; }
a:hover { text-decoration-color: currentColor; }
:focus-visible { outline: 3px solid var(--ho-phach); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3 { font-family: var(--font-tieu-de); font-weight: 600; line-height: 1.12; letter-spacing: -0.02em; text-wrap: balance; margin: 0; }
h2 { font-size: clamp(1.75rem, 3.6vw, 2.6rem); }
h3 { font-size: 1.2rem; letter-spacing: -0.01em; }
p { margin: 0; }
.boc { width: 100%; max-width: var(--rong); margin: 0 auto; padding: 0 var(--le); }
@media (min-width: 700px) { :root { --le: 28px; } }
.an-chu { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.nhay-toi { position: absolute; left: 12px; top: -60px; background: var(--ho-phach); color: var(--muc); padding: 10px 14px; border-radius: var(--bo-nho); font-weight: 600; z-index: 50; }
.nhay-toi:focus { top: 12px; }

/* ---------- Đầu trang ---------- */
.dau { position: sticky; top: 0; z-index: 20; background: var(--muc); color: var(--toi-chu); border-bottom: 1px solid var(--muc-vien); }
.dau .boc { display: flex; align-items: center; gap: 12px; min-height: 64px; }
.logo { display: inline-flex; align-items: center; gap: 10px; font: 600 1.2rem/1 var(--font-tieu-de); text-decoration: none; color: var(--toi-chu); letter-spacing: -0.01em; }
.logo svg { width: 30px; height: 30px; flex: none; }
.menu { margin-left: auto; display: none; }
.menu ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 4px; }
.menu a { display: block; padding: 8px 12px; border-radius: var(--bo-nho); text-decoration: none; color: var(--toi-phu); font-size: 0.95rem; font-weight: 500; }
.menu a:hover, .menu a[aria-current="page"] { color: var(--toi-chu); background: var(--muc-2); }
.dau-phai { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.menu + .dau-phai { margin-left: 8px; }
.ngon-ngu { display: inline-flex; border: 1px solid var(--muc-vien); border-radius: 999px; padding: 2px; }
.ngon-ngu button { appearance: none; border: 0; background: none; color: var(--toi-phu); font: 600 0.8rem/1 var(--font-chu); padding: 7px 10px; border-radius: 999px; cursor: pointer; min-width: 38px; min-height: 32px; }
.ngon-ngu button[aria-pressed="true"] { background: var(--toi-chu); color: var(--muc); }
.nut-menu { appearance: none; display: inline-grid; place-items: center; width: 44px; height: 44px; border: 1px solid var(--muc-vien); background: none; color: var(--toi-chu); border-radius: var(--bo-nho); cursor: pointer; }
.nut-menu svg { width: 20px; height: 20px; }
.dau .nut-dau { display: none; }
.menu-dong { border-top: 1px solid var(--muc-vien); padding: 8px var(--le) 16px; }
.menu-dong[hidden] { display: none; }
.menu-dong ul { list-style: none; margin: 0 auto; padding: 0; max-width: var(--rong); }
.menu-dong a { display: block; padding: 12px 4px; color: var(--toi-chu); text-decoration: none; border-bottom: 1px solid var(--muc-2); font-weight: 500; }
@media (min-width: 980px) {
  .menu { display: block; }
  .nut-menu { display: none; }
  .menu-dong { display: none !important; }
  .dau .nut-dau { display: inline-flex; }
}

/* ---------- Nút ---------- */
.nut { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 12px 22px; border-radius: 10px; font: 600 1rem/1.2 var(--font-chu); text-decoration: none; border: 1px solid transparent; cursor: pointer; transition: background-color .15s ease, border-color .15s ease, color .15s ease; }
.nut-chinh { background: var(--ho-phach); color: var(--muc); }
.nut-chinh:hover { background: #f6b85f; }
.nut-vien { border-color: currentColor; color: inherit; background: transparent; }
.nut-vien:hover { background: rgba(240,166,64,.12); }
.nut-nho { min-height: 40px; padding: 8px 14px; font-size: 0.92rem; }
.nut[disabled], .nut[aria-disabled="true"] { background: transparent; color: var(--chu-phu); border: 1px dashed var(--vien); cursor: not-allowed; }
.vung-toi .nut[disabled] { color: var(--toi-phu); border-color: var(--muc-vien); }
.hang-nut { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

/* ---------- Vùng tối (chiếu hình) ---------- */
.vung-toi { background: var(--muc); color: var(--toi-chu); }
.vung-toi .phu { color: var(--toi-phu); }
.mo-dau { padding: 40px 0 56px; }
.mo-dau .boc { display: grid; gap: 40px; }
.mo-dau h1 { font-size: clamp(2.3rem, 5.4vw, 3.9rem); letter-spacing: -0.025em; line-height: 1.1; max-width: 13em; }
.mo-dau .dan { font-size: 1.1rem; color: var(--toi-phu); max-width: 46ch; margin: 18px 0 28px; }
.mo-dau .dan-luu-y { color: var(--toi-phu); font-size: 0.95rem; margin: -14px 0 24px; max-width: 46ch; }
.mo-dau .su-that { list-style: none; padding: 0; margin: 22px 0 0; display: flex; flex-wrap: wrap; gap: 8px 18px; color: var(--toi-phu); font-size: 0.92rem; }
.mo-dau .su-that li { display: inline-flex; align-items: center; gap: 8px; }
.mo-dau .su-that svg { width: 16px; height: 16px; color: var(--ho-phach); flex: none; }
@media (min-width: 980px) {
  .mo-dau { padding: 72px 0 88px; }
  .mo-dau .boc { grid-template-columns: 1.05fr 1fr; align-items: center; gap: 56px; }
}

/* Bàn dựng: một câu lệnh, hai máy */
.ban-dung { background: var(--muc-2); border: 1px solid var(--muc-vien); border-radius: 18px; padding: 16px; }
.cau-lenh { font-size: 0.9rem; line-height: 1.55; color: var(--toi-chu); padding: 2px 4px 14px; border-bottom: 1px solid var(--muc-vien); }
.cau-lenh b { display: block; font-weight: 600; color: var(--ho-phach); font-size: 0.82rem; margin-bottom: 4px; }
.cau-lenh q { quotes: none; }
.hai-may { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 14px; }
.khung-may { margin: 0; }
.khung-may .man { position: relative; aspect-ratio: 9 / 16; border-radius: 10px; overflow: hidden; background: #0d161d; }
.khung-may video, .khung-may img { width: 100%; height: 100%; object-fit: cover; }
.khung-may figcaption { margin-top: 10px; font-size: 0.86rem; line-height: 1.4; }
.khung-may figcaption b { display: block; font-weight: 600; color: var(--toi-chu); }
.khung-may figcaption span { color: var(--toi-phu); font-variant-numeric: tabular-nums; }
.thuoc { margin-top: 8px; height: 6px; border-radius: 3px; background: repeating-linear-gradient(90deg, var(--muc-vien) 0 2px, transparent 2px 10px); position: relative; overflow: hidden; }
.thuoc i { position: absolute; inset: 0 auto 0 0; width: 100%; background: var(--ho-phach); transform-origin: left; transform: scaleX(0); border-radius: 3px; }
.nut-phat { position: absolute; right: 8px; bottom: 8px; width: 40px; height: 40px; border-radius: 50%; border: 0; background: rgba(19,32,42,.78); color: var(--toi-chu); display: grid; place-items: center; cursor: pointer; }
.nut-phat svg { width: 16px; height: 16px; }
.ghi-chu-mau { margin-top: 14px; font-size: 0.82rem; color: var(--toi-phu); line-height: 1.5; }
@media (min-width: 980px) { .ban-dung { padding: 22px; } .hai-may { gap: 18px; } }

/* ---------- Phần nội dung ---------- */
.phan { padding: 64px 0; }
.phan + .phan { border-top: 1px solid var(--vien); }
.phan-dau { max-width: 62ch; margin-bottom: 36px; }
.phan-dau p { margin-top: 14px; color: var(--chu-phu); font-size: 1.05rem; }
@media (min-width: 980px) { .phan { padding: 96px 0; } }
.nen-trang { background: var(--trang); }

/* Tính năng: một khối lớn + danh sách */
.chuoi { display: grid; gap: 28px; padding: 24px; background: var(--trang); border: 1px solid var(--vien); border-radius: 18px; margin-bottom: 40px; }
.chuoi h3 { font-size: clamp(1.35rem, 2.4vw, 1.75rem); }
.chuoi p { color: var(--chu-phu); margin-top: 10px; max-width: 52ch; }
.chuoi .luu-y { font-size: 0.92rem; margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--vien); }
.so-do-khung { margin: 0; }
.so-do { width: 100%; max-width: 480px; height: auto; }
.so-do-khung figcaption { margin-top: 14px; font-size: 0.9rem; color: var(--chu-phu); max-width: 46ch; }
@media (min-width: 900px) { .chuoi { grid-template-columns: 0.9fr 1.1fr; align-items: center; padding: 36px; gap: 40px; } }
.ds-tinh-nang { list-style: none; padding: 0; margin: 0; display: grid; gap: 0 40px; }
.ds-tinh-nang li { display: grid; grid-template-columns: 40px 1fr; align-content: start; gap: 4px 16px; padding: 22px 0; border-top: 1px solid var(--vien); }
.ds-tinh-nang svg { width: 28px; height: 28px; color: var(--ho-phach-dam); grid-row: span 2; margin-top: 2px; }
.ds-tinh-nang h3 { font-size: 1.12rem; }
.ds-tinh-nang p { color: var(--chu-phu); grid-column: 2; }
@media (min-width: 800px) { .ds-tinh-nang { grid-template-columns: 1fr 1fr; } }

/* Ảnh giao diện */
.cua-so { margin: 0; border-radius: 14px; overflow: hidden; border: 1px solid #0d161d; background: var(--muc); box-shadow: 0 24px 48px -24px rgba(19,32,42,.45); }
.cua-so .thanh { display: flex; gap: 6px; padding: 10px 12px; background: #0d161d; }
.cua-so .thanh span { width: 10px; height: 10px; border-radius: 50%; background: var(--muc-vien); }
.cua-so img { width: 100%; height: auto; }
.chu-anh { margin-top: 12px; font-size: 0.9rem; color: var(--chu-phu); }

/* Bước */
.ds-buoc { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; counter-reset: buoc; }
.ds-buoc li { counter-increment: buoc; position: relative; padding: 20px 20px 20px 68px; background: var(--trang); border: 1px solid var(--vien); border-radius: var(--bo); }
.ds-buoc li::before { content: counter(buoc); position: absolute; left: 20px; top: 18px; width: 32px; height: 32px; border-radius: 50%; background: var(--muc); color: var(--ho-phach); display: grid; place-items: center; font: 600 0.95rem/1 var(--font-tieu-de); }
.ds-buoc p { color: var(--chu-phu); margin-top: 4px; }
@media (min-width: 900px) { .ds-buoc { grid-template-columns: repeat(4, 1fr); } .ds-buoc li { padding: 64px 20px 22px; } .ds-buoc li::before { top: 20px; } }

/* Bảng nhà cung cấp */
.bang-cuon { overflow-x: auto; border: 1px solid var(--vien); border-radius: var(--bo); background: var(--trang); }
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
th, td { text-align: left; vertical-align: top; padding: 14px 16px; border-bottom: 1px solid var(--vien); }
thead th { font-weight: 600; font-size: 0.85rem; color: var(--chu-phu); background: var(--nen); }
tbody tr:last-child th, tbody tr:last-child td { border-bottom: 0; }
tbody th { font-weight: 600; white-space: nowrap; }
@media (max-width: 760px) {
  .bang-xep table, .bang-xep thead, .bang-xep tbody, .bang-xep tr, .bang-xep th, .bang-xep td { display: block; }
  .bang-xep thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .bang-xep tr { padding: 14px 16px; border-bottom: 1px solid var(--vien); }
  .bang-xep tbody tr:last-child { border-bottom: 0; }
  .bang-xep th, .bang-xep td { padding: 2px 0; border: 0; }
  .bang-xep td::before { content: attr(data-nhan); display: block; font-size: 0.8rem; color: var(--chu-phu); margin-top: 8px; }
}
.ghi-ro { margin-top: 28px; padding: clamp(20px, 3vw, 36px); border-radius: var(--bo); background: var(--muc); color: var(--toi-chu); }
.ghi-ro h3 { color: var(--ho-phach); margin-bottom: 10px; font-size: 1.1rem; }
.ghi-ro p { color: var(--toi-chu); font-size: 0.95rem; max-width: 80ch; }
.ghi-ro p + p { margin-top: 10px; }
.ghi-ro a { color: var(--toi-chu); }
.ghi-ro .phu { font-size: 0.88rem; }
.chip { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 18px 0 0; }
.chip li { border: 1px solid var(--vien); background: var(--trang); border-radius: 999px; padding: 6px 12px; font-size: 0.9rem; }

/* Giá */
.chon-tien { display: inline-flex; border: 1px solid var(--vien); background: var(--trang); border-radius: 999px; padding: 3px; margin-bottom: 22px; }
.chon-tien button { appearance: none; border: 0; background: none; font: 600 0.92rem/1 var(--font-chu); color: var(--chu-phu); padding: 10px 16px; border-radius: 999px; cursor: pointer; min-height: 40px; }
.chon-tien button[aria-selected="true"] { background: var(--muc); color: var(--toi-chu); }
.goi { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.goi li { background: var(--trang); border: 1px solid var(--vien); border-radius: var(--bo); padding: 18px; display: flex; flex-direction: column; gap: 4px; }
.goi .ky { font-weight: 600; font-size: 0.95rem; }
.goi .tien { font: 600 clamp(1.35rem, 3.4vw, 1.9rem)/1.15 var(--font-tieu-de); letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.goi .quy { font-size: 0.85rem; color: var(--chu-phu); font-variant-numeric: tabular-nums; }
@media (min-width: 900px) { .goi-4 { grid-template-columns: repeat(4, 1fr); } .goi-2 { grid-template-columns: repeat(2, minmax(0, 280px)); } .goi li { padding: 24px; } }
.gom { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 10px 32px; }
.gom li { position: relative; padding-left: 28px; color: var(--chu); }
.gom li svg { position: absolute; left: 0; top: 5px; width: 18px; height: 18px; color: var(--xanh); }
@media (min-width: 800px) { .gom { grid-template-columns: 1fr 1fr; } }
.ma-gioi-thieu { margin-top: 22px; padding: 14px 16px; border: 1px dashed var(--ho-phach-dam); border-radius: var(--bo-nho); font-size: 0.95rem; background: #fff8ec; }
.ma-gioi-thieu[hidden] { display: none; }
.ma-gioi-thieu code { font: 600 1rem/1 var(--font-chu); background: var(--trang); border: 1px solid var(--vien); padding: 3px 8px; border-radius: 6px; }

/* Tải về */
.tai-ve { display: grid; gap: 28px; }
.tai-ve dl { margin: 0; display: grid; grid-template-columns: max-content 1fr; gap: 10px 20px; font-size: 0.95rem; }
.tai-ve dt { color: var(--toi-phu); }
.tai-ve dd { margin: 0; }
@media (min-width: 900px) { .tai-ve { grid-template-columns: 1.2fr 1fr; align-items: start; } }

/* Hỏi đáp */
.hoi-dap { max-width: 820px; }
.hoi-dap details { border-top: 1px solid var(--vien); }
.hoi-dap details:last-child { border-bottom: 1px solid var(--vien); }
.hoi-dap summary { list-style: none; cursor: pointer; padding: 18px 40px 18px 0; position: relative; font-weight: 600; font-size: 1.04rem; }
.hoi-dap summary::-webkit-details-marker { display: none; }
.hoi-dap summary::after { content: ""; position: absolute; right: 6px; top: 26px; width: 10px; height: 10px; border-right: 2px solid var(--chu-phu); border-bottom: 2px solid var(--chu-phu); transform: rotate(45deg); transition: transform .2s ease; }
.hoi-dap details[open] summary::after { transform: rotate(-135deg); top: 30px; }
.hoi-dap details p { color: var(--chu-phu); padding: 0 0 20px; max-width: 72ch; }
.hoi-dap details p + p { margin-top: -8px; }

/* Affiliate ngắn ở trang chủ */
.ban-gioi-thieu { display: grid; gap: 24px; padding: 28px; border-radius: 18px; background: var(--muc); color: var(--toi-chu); }
.ban-gioi-thieu p { color: var(--toi-phu); margin-top: 10px; max-width: 60ch; }
.ban-gioi-thieu .so-lon { font: 600 clamp(2.4rem, 7vw, 4.4rem)/1 var(--font-tieu-de); color: var(--ho-phach); letter-spacing: -0.03em; }
@media (min-width: 900px) { .ban-gioi-thieu { grid-template-columns: auto 1fr auto; align-items: center; padding: 40px; gap: 40px; } }

/* Kết */
.ket { padding: 64px 0; }
.ket .boc { display: grid; gap: 22px; }
.ket h2 { max-width: 20ch; }
@media (min-width: 900px) { .ket { padding: 88px 0; } .ket .boc { grid-template-columns: 1fr auto; align-items: end; } }

/* ---------- Chân trang ---------- */
.chan { background: #0d161d; color: var(--toi-phu); font-size: 0.92rem; padding: 48px 0 32px; }
.chan a { color: var(--toi-chu); text-decoration: none; }
.chan a:hover { text-decoration: underline; text-decoration-color: var(--ho-phach); }
.chan .cot { display: grid; gap: 28px; }
.chan h2 { font: 600 0.95rem/1.3 var(--font-chu); letter-spacing: 0; color: var(--toi-chu); margin-bottom: 10px; }
.chan ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.chan .gioi-thieu p { margin-top: 12px; max-width: 40ch; }
.chan .duoi { margin-top: 36px; padding-top: 20px; border-top: 1px solid var(--muc-2); display: grid; gap: 8px; font-size: 0.85rem; }
@media (min-width: 800px) { .chan .cot { grid-template-columns: 1.6fr 1fr 1fr 1fr; } }

/* ---------- Trang đọc (điều khoản, riêng tư) ---------- */
.trang-doc { padding: 40px 0 72px; }
.trang-doc .boc { max-width: 820px; }
.trang-doc h1 { font-size: clamp(2rem, 5vw, 3rem); letter-spacing: -0.025em; margin-bottom: 8px; }
.trang-doc h2 { font-size: 1.3rem; margin: 40px 0 10px; letter-spacing: -0.01em; }
.trang-doc p, .trang-doc li { max-width: 72ch; }
.trang-doc p + p { margin-top: 14px; }
.trang-doc ul { padding-left: 1.2em; margin: 10px 0 0; }
.trang-doc li + li { margin-top: 10px; }
.trang-doc li::marker { color: var(--ho-phach-dam); }
.trang-doc .mo { color: var(--chu-phu); font-size: 0.92rem; }
.trang-doc a { color: var(--chu); }
.trang-doc hr { border: 0; border-top: 1px solid var(--vien); margin: 56px 0; }
.trang-doc [lang="en"] p + p { margin-top: 16px; }
.doi-ban { margin: 18px 0 0; font-size: 0.92rem; }
[data-khoi-ngon-ngu][hidden] { display: none; }

/* ---------- Affiliate ---------- */
.mo-dau-aff { padding: 48px 0 56px; }
.mo-dau-aff h1 { font-size: clamp(2.2rem, 6vw, 4rem); letter-spacing: -0.03em; line-height: 1.05; max-width: 16ch; }
.mo-dau-aff .dan { color: var(--toi-phu); font-size: 1.1rem; max-width: 56ch; margin: 18px 0 26px; }
.bang-so { list-style: none; padding: 0; margin: 36px 0 0; display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--muc-vien); border: 1px solid var(--muc-vien); border-radius: var(--bo); overflow: hidden; }
.bang-so li { background: var(--muc); padding: 18px; }
.bang-so b { display: block; font: 600 clamp(1.4rem, 3.6vw, 2rem)/1.1 var(--font-tieu-de); color: var(--ho-phach); letter-spacing: -0.02em; }
.bang-so span { display: block; margin-top: 6px; color: var(--toi-phu); font-size: 0.9rem; line-height: 1.4; }
@media (min-width: 900px) { .bang-so { grid-template-columns: repeat(4, 1fr); } .mo-dau-aff { padding: 80px 0 88px; } }
.vi-du { margin-top: 28px; background: var(--trang); border: 1px solid var(--vien); border-radius: var(--bo); padding: 20px; }
.vi-du h3 { margin-bottom: 8px; }
.vi-du p { color: var(--chu-phu); }
.vi-du td, .vi-du th { font-variant-numeric: tabular-nums; }
.quy-tac { list-style: none; padding: 0; margin: 0; display: grid; gap: 0; }
.quy-tac li { display: grid; grid-template-columns: 28px 1fr; gap: 14px; padding: 18px 0; border-top: 1px solid var(--vien); }
.quy-tac li:last-child { border-bottom: 1px solid var(--vien); }
.quy-tac svg { width: 22px; height: 22px; margin-top: 2px; }
.quy-tac .duoc svg { color: var(--xanh); }
.quy-tac .cam svg { color: var(--do); }
.quy-tac b { display: block; }
.quy-tac p { color: var(--chu-phu); margin-top: 2px; }
.hai-cot { display: grid; gap: 40px; }
@media (min-width: 960px) { .hai-cot { grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; } }

/* Biểu mẫu */
.the { background: var(--trang); border: 1px solid var(--vien); border-radius: 18px; padding: 22px; }
@media (min-width: 700px) { .the { padding: 30px; } }
.the h3 { font-size: 1.3rem; margin-bottom: 6px; }
.the > p { color: var(--chu-phu); margin-bottom: 18px; }
.truong { display: grid; gap: 6px; margin-bottom: 16px; }
.truong label, .truong legend { font-weight: 600; font-size: 0.92rem; }
.truong .goi-y { font-size: 0.85rem; color: var(--chu-phu); }
input[type="text"], input[type="email"], input[type="url"], textarea, select { width: 100%; font: 400 1rem/1.4 var(--font-chu); color: var(--chu); background: var(--trang); border: 1px solid #aab6bf; border-radius: var(--bo-nho); padding: 12px 14px; min-height: 48px; }
textarea { min-height: 96px; resize: vertical; }
input:focus-visible, textarea:focus-visible, select:focus-visible { outline: 3px solid var(--ho-phach); outline-offset: 1px; border-color: var(--muc); }
input:disabled, textarea:disabled, select:disabled { background: var(--nen); color: var(--chu-phu); cursor: not-allowed; }
input[aria-invalid="true"], textarea[aria-invalid="true"] { border-color: var(--do); }
fieldset { border: 0; padding: 0; margin: 0 0 16px; }
.lua-chon { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 6px; }
.lua-chon label, .dong-y label { display: inline-flex; gap: 10px; align-items: flex-start; font-weight: 400; font-size: 0.95rem; cursor: pointer; }
input[type="radio"], input[type="checkbox"] { width: 20px; height: 20px; margin: 2px 0 0; accent-color: var(--muc); flex: none; }
.dong-y { display: grid; gap: 10px; margin: 6px 0 20px; }
.bao { margin-top: 14px; font-size: 0.95rem; padding: 12px 14px; border-radius: var(--bo-nho); }
.bao:empty { display: none; }
.bao.loi { background: #fdecea; color: #7a1a14; }
.bao.ok { background: #e7f4ec; color: #1d5a40; }
.trang-thai-api { display: grid; grid-template-columns: 22px 1fr; gap: 12px; padding: 16px 18px; border-radius: var(--bo); background: #fff8ec; border: 1px solid #f1d3a3; margin-bottom: 28px; }
.trang-thai-api svg { width: 22px; height: 22px; color: var(--ho-phach-dam); margin-top: 2px; }
.trang-thai-api b { display: block; }
.trang-thai-api p { color: var(--chu-phu); font-size: 0.95rem; margin-top: 2px; }
.trang-thai-api[data-tt="mo"] { background: #e7f4ec; border-color: #b9dcc8; }
.trang-thai-api[data-tt="mo"] svg { color: var(--xanh); }
.bang-theo-doi[hidden] { display: none; }
.so-lieu { list-style: none; padding: 0; margin: 18px 0; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.so-lieu li { border: 1px solid var(--vien); border-radius: var(--bo-nho); padding: 12px; }
.so-lieu span { display: block; font-size: 0.82rem; color: var(--chu-phu); }
.so-lieu b { font: 600 1.25rem/1.2 var(--font-tieu-de); font-variant-numeric: tabular-nums; }
.dong-ma { display: flex; gap: 8px; align-items: stretch; }
.dong-ma input { flex: 1; min-width: 0; }
.trong { padding: 18px; border: 1px dashed var(--vien); border-radius: var(--bo-nho); color: var(--chu-phu); text-align: center; font-size: 0.95rem; }
.trang-thai-api .lien-he { margin-top: 8px; font-size: 0.92rem; }
code.url { font: 500 0.9em/1.4 var(--font-chu); white-space: nowrap; background: var(--nen); border: 1px solid var(--vien); border-radius: 5px; padding: 1px 5px; color: var(--chu); }
.vi-du td { white-space: nowrap; }

/* ---------- Trang mua gói ---------- */
.mua-mo-dau { padding: 40px 0 44px; }
.mua-mo-dau h1 { font-size: clamp(2rem, 5vw, 3.1rem); letter-spacing: -0.025em; max-width: 16ch; }
.mua-mo-dau .dan { color: var(--toi-phu); font-size: 1.08rem; max-width: 56ch; margin: 16px 0 0; }
.mua-mo-dau .su-that { list-style: none; padding: 0; margin: 22px 0 0; display: flex; flex-wrap: wrap; gap: 8px 18px; color: var(--toi-phu); font-size: 0.92rem; }
.mua-mo-dau .su-that li { display: inline-flex; align-items: center; gap: 8px; }
.mua-mo-dau .su-that svg { width: 16px; height: 16px; color: var(--ho-phach); flex: none; }
@media (min-width: 900px) { .mua-mo-dau { padding: 64px 0 60px; } }

.mua .boc { max-width: 720px; }
.mua-form { margin: 0; }
.mua-form .truong { margin-bottom: 24px; }
.mua-form legend { font-weight: 600; font-size: 1.05rem; font-family: var(--font-tieu-de); letter-spacing: -0.01em; margin-bottom: 4px; }
.mua-form legend + .goi-y { margin: 0 0 12px; }

/* Nơi thanh toán: nút gạt hai phần */
.mua-seg { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 10px; }
.mua-seg label { position: relative; display: block; cursor: pointer; }
.mua-seg input { position: absolute; opacity: 0; inset: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; }
.mua-seg span { display: block; text-align: center; padding: 14px 12px; border: 1px solid var(--vien); border-radius: var(--bo); background: var(--trang); font-weight: 600; font-size: 0.95rem; line-height: 1.3; }
.mua-seg input:checked + span { border-color: var(--muc); background: var(--muc); color: var(--toi-chu); }
.mua-seg input:focus-visible + span { outline: 3px solid var(--ho-phach); outline-offset: 2px; }

/* Thẻ chọn gói */
.mua-goi { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 10px; }
.mua-the-goi { position: relative; display: flex; flex-direction: column; gap: 3px; padding: 16px; border: 1px solid var(--vien); border-radius: var(--bo); background: var(--trang); cursor: pointer; }
.mua-the-goi input { position: absolute; opacity: 0; inset: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; }
.mua-the-goi .ky { font-weight: 600; font-size: 0.95rem; }
.mua-the-goi .tien { font: 600 clamp(1.3rem, 3.2vw, 1.7rem)/1.15 var(--font-tieu-de); letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.mua-the-goi .quy { font-size: 0.82rem; color: var(--chu-phu); font-variant-numeric: tabular-nums; }
.mua-the-goi.chon, .mua-the-goi:has(input:checked) { border-color: var(--muc); box-shadow: inset 0 0 0 1px var(--muc); }
.mua-the-goi:has(input:focus-visible) { outline: 3px solid var(--ho-phach); outline-offset: 2px; }
.mua-the-goi .dau-tich { position: absolute; top: 12px; right: 12px; width: 20px; height: 20px; border-radius: 50%; border: 2px solid var(--vien); display: grid; place-items: center; }
.mua-the-goi .dau-tich svg { width: 12px; height: 12px; color: var(--trang); opacity: 0; }
.mua-the-goi.chon .dau-tich, .mua-the-goi:has(input:checked) .dau-tich { background: var(--muc); border-color: var(--muc); }
.mua-the-goi.chon .dau-tich svg, .mua-the-goi:has(input:checked) .dau-tich svg { opacity: 1; }
@media (min-width: 560px) { .mua-goi { grid-template-columns: repeat(4, 1fr); } .mua-goi.it { grid-template-columns: repeat(2, minmax(0, 220px)); } }

.mua-form .ma-gioi-thieu { margin: 0 0 20px; }
.mua-gui { width: 100%; margin-top: 4px; }
.mua-form .bao { margin-top: 14px; }

/* ---------- Panel thanh toán ---------- */
.mua-tt { margin-top: 4px; }
.mua-tt[hidden] { display: none; }
.mua-the-tt { background: var(--trang); border: 1px solid var(--vien); border-radius: 18px; padding: 22px; }
@media (min-width: 700px) { .mua-the-tt { padding: 30px; } }
.mua-tt h3 { font-size: 1.4rem; margin-bottom: 6px; }
.mua-tt .tom { color: var(--chu-phu); margin-bottom: 20px; }
.mua-tt .tom b { color: var(--chu); font-weight: 600; }

.mua-ck { display: grid; gap: 22px; }
@media (min-width: 620px) { .mua-ck { grid-template-columns: auto 1fr; align-items: start; } }
.mua-qr { margin: 0; text-align: center; }
.mua-qr img { width: 210px; height: 210px; margin: 0 auto; border: 1px solid var(--vien); border-radius: var(--bo); background: var(--trang); }
.mua-qr figcaption { margin-top: 8px; font-size: 0.85rem; color: var(--chu-phu); max-width: 210px; }
.mua-ck dl { margin: 0; display: grid; grid-template-columns: max-content 1fr; gap: 10px 16px; font-size: 0.95rem; align-content: start; }
.mua-ck dt { color: var(--chu-phu); }
.mua-ck dd { margin: 0; font-weight: 600; word-break: break-word; }
.mua-ck dd.so { font-variant-numeric: tabular-nums; }
.mua-sao { display: inline-flex; align-items: center; gap: 8px; }
.mua-sao code { font: 600 1rem/1 var(--font-chu); background: var(--nen); border: 1px solid var(--vien); padding: 5px 9px; border-radius: 6px; letter-spacing: 0.04em; }
.mua-nut-sao { appearance: none; border: 1px solid var(--vien); background: var(--trang); color: var(--chu); border-radius: 6px; padding: 6px 10px; font: 600 0.82rem/1 var(--font-chu); cursor: pointer; min-height: 34px; }
.mua-nut-sao:hover { border-color: var(--muc); }

.mua-luuy { margin-top: 20px; padding: 14px 16px; border: 1px dashed var(--ho-phach-dam); border-radius: var(--bo-nho); background: #fff8ec; font-size: 0.95rem; }
.mua-dong-ho { margin-top: 18px; font-size: 0.95rem; color: var(--chu-phu); }
.mua-dong-ho b { font-weight: 600; color: var(--chu); font-variant-numeric: tabular-nums; }
.mua-dong-ho.het b { color: var(--do); }

.mua-trang-thai { margin-top: 20px; padding: 16px 18px; border-radius: var(--bo); display: grid; grid-template-columns: 26px 1fr; gap: 14px; align-items: start; border: 1px solid var(--vien); background: var(--nen); }
.mua-trang-thai .bieu { width: 26px; height: 26px; margin-top: 1px; }
.mua-trang-thai b { display: block; }
.mua-trang-thai p { color: var(--chu-phu); font-size: 0.95rem; margin-top: 3px; }
.mua-trang-thai p + p { margin-top: 6px; }
.mua-trang-thai.cho { background: #fff8ec; border-color: #f1d3a3; }
.mua-trang-thai.cho .bieu { color: var(--ho-phach-dam); }
.mua-trang-thai.ok { background: #e7f4ec; border-color: #b9dcc8; }
.mua-trang-thai.ok .bieu { color: var(--xanh); }
.mua-trang-thai.loi { background: #fdecea; border-color: #f3c3bd; }
.mua-trang-thai.loi .bieu { color: var(--do); }
.mua-trang-thai .quay { appearance: none; margin-top: 12px; }

/* vòng xoay chờ (tôn trọng giảm chuyển động) */
.mua-xoay { width: 22px; height: 22px; border: 3px solid var(--vien); border-top-color: var(--ho-phach-dam); border-radius: 50%; animation: mua-quay 0.9s linear infinite; }
@keyframes mua-quay { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .mua-xoay { animation: none; } }

/* ---------- Nền video mờ sau phần mở đầu ---------- */
.mo-dau { position: relative; overflow: hidden; isolation: isolate; }
.mo-nen { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; opacity: 0.16; filter: blur(2px) saturate(1.05); pointer-events: none; }
.mo-phu { position: absolute; inset: 0; z-index: -1; pointer-events: none; background: linear-gradient(90deg, var(--muc) 0%, var(--muc) 40%, rgba(19,32,42,.8) 72%, rgba(19,32,42,.52) 100%); }
@media (prefers-reduced-motion: reduce) { .mo-nen { opacity: 0.1; } }

/* ---------- Máy tạo video: thẻ ---------- */
.luoi-may { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.the-may { background: var(--trang); border: 1px solid var(--vien); border-radius: var(--bo); padding: 22px; display: flex; flex-direction: column; }
.the-may .nhan { font: 600 0.72rem/1.3 var(--font-chu); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ho-phach-dam); }
.the-may h3 { margin-top: 8px; font-size: 1.3rem; }
.the-may > p { margin-top: 8px; color: var(--chu-phu); max-width: 46ch; }
.vien-may { list-style: none; padding: 0; margin: 16px 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
.vien-may li { display: inline-flex; align-items: center; gap: 6px; background: #eaf3ee; color: #1d5a40; border: 1px solid #c4e2d1; border-radius: 999px; padding: 6px 12px; font-size: 0.85rem; font-weight: 500; }
.vien-may svg { width: 14px; height: 14px; color: var(--xanh); flex: none; }
@media (min-width: 760px) {
  .luoi-may { grid-template-columns: 1fr 1fr; gap: 18px; }
  .the-may { padding: 26px; }
  .the-may-rong { grid-column: 1 / -1; }
}

/* ---------- Thư viện video mẫu ---------- */
.luoi-video { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 0; }
.o-video { margin: 0; }
.o-video .man { position: relative; aspect-ratio: 9 / 16; border-radius: 12px; overflow: hidden; background: #0d161d; border: 1px solid var(--muc-vien); }
.o-video video { width: 100%; height: 100%; object-fit: cover; }
.o-video figcaption { margin-top: 10px; font-size: 0.88rem; color: var(--toi-phu); font-variant-numeric: tabular-nums; }
.ghi-video { margin-top: 20px; font-size: 0.85rem; color: var(--toi-phu); line-height: 1.5; }
@media (min-width: 760px) { .luoi-video { grid-template-columns: repeat(4, 1fr); gap: 18px; } }
.luoi-trailer { display: grid; grid-template-columns: 1fr; gap: 16px; margin: 0; }
.o-trailer { margin: 0; }
.o-trailer .man-ngang { position: relative; aspect-ratio: 16 / 9; border-radius: 12px; overflow: hidden; background: #0d161d; border: 1px solid var(--muc-vien); }
.o-trailer video { width: 100%; height: 100%; object-fit: cover; }
.o-trailer figcaption { margin-top: 10px; font-size: 0.88rem; color: var(--toi-phu); }
@media (min-width: 760px) { .luoi-trailer { grid-template-columns: 1fr 1fr; gap: 18px; } }