/* Trang bán Saidly — sáng, ấm như chính app (nền #F5F3F0, chàm #4F46E5); HOẠ TIẾT XUYÊN SUỐT = cột mốc thời gian chàm cạnh dòng chữ, như trong app. */
body { --sd-nen: #F6F3EE; --sd-o: #FFFFFF; --sd-chu: #1B1A2E; --sd-mo: #5E5B70; --sd-vien: #E5E0D8; --sd-cham: #4F46E5; --sd-cham-dam: #1E1B4B; --sd-nhat: #EEF0FF; --sd-xanh: #15803D; --sd-tren: #FFFFFF;
  background: var(--sd-nen); color: var(--sd-chu); }
@media (prefers-color-scheme: dark) {
  body { --sd-nen: #121222; --sd-o: #1B1B30; --sd-chu: #ECEAF6; --sd-mo: #A3A1BA; --sd-vien: #2C2B46; --sd-cham: #8B85FF; --sd-cham-dam: #0B0A1C; --sd-nhat: #23224A; --sd-xanh: #4ADE80; --sd-tren: #12112A; }
}
body .brand, body footer, body footer a { color: var(--sd-mo); }
.wrap.rong { max-width: 1160px; }
.sc h1, .sc h2, .sc h3 { color: var(--sd-chu); }
.sc p { color: var(--sd-mo); }
.sc a { color: var(--sd-cham); }
.sc mark { background: linear-gradient(transparent 60%, rgba(79,70,229,.22) 60%, rgba(79,70,229,.22) 92%, transparent 92%); color: inherit; padding: 0 .06em; }
.sc section { margin-bottom: 96px; }
.sc h2 { font-size: clamp(26px, 3.4vw, 38px); line-height: 1.12; letter-spacing: -.025em; margin: 0 0 14px; }
.sc .sd-giua { text-align: center; margin: 0 auto 10px; max-width: 24ch; }
.sc .sd-giua-phu { text-align: center; max-width: 62ch; margin: 0 auto 28px !important; }
/* đầu trang */
.sd-dau { display: grid; gap: 34px; align-items: center; padding-top: 8px; }
.sd-ten { display: flex; align-items: center; gap: 18px; font-size: clamp(54px, 8vw, 92px); line-height: .95; letter-spacing: -.05em; margin: 0 0 10px; }
.sd-ten img { width: clamp(52px, 6vw, 76px); height: auto; border-radius: 18px; box-shadow: 0 12px 30px -12px rgba(79,70,229,.6); }
.sd-loai { font-size: 15px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; margin: 0 0 22px; }
.sd-khau { font-size: clamp(26px, 3.2vw, 36px); line-height: 1.12; letter-spacing: -.03em; font-weight: 700; color: var(--sd-chu) !important; margin: 0 0 16px; }
.sd-phu { font-size: clamp(17px, 1.8vw, 20px); line-height: 1.55; max-width: 46ch; margin-bottom: 28px; }
.sd-mua { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 18px; }
.sd-mua > span { font-size: 14px; color: var(--sd-mo); }
.sc-nut { display: inline-flex; align-items: center; padding: 15px 24px; border-radius: 12px; background: var(--sd-cham); color: var(--sd-tren) !important; font-weight: 700; font-size: 17px; text-decoration: none; box-shadow: 0 12px 30px -12px rgba(79,70,229,.7); }
.sc-nut b { color: var(--sd-tren); }
.sd-anh { position: relative; margin: 0; border-radius: 22px; overflow: hidden; aspect-ratio: 4 / 4.2; background: #ddd; }
.sd-anh > img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 30%; display: block; }
.sd-anh figcaption { position: absolute; right: 10px; top: 8px; font-size: 11px; color: rgba(255,255,255,.85); text-shadow: 0 1px 2px rgba(0,0,0,.6); }
.sd-the { position: absolute; left: 6%; right: 6%; bottom: 6%; background: rgba(255,255,255,.96); border-radius: 14px; padding: 14px 16px; display: grid; grid-template-columns: auto 1fr; gap: 4px 12px; box-shadow: 0 20px 50px -20px rgba(0,0,0,.6); }
.sd-the b { grid-column: 1 / -1; font-size: 13px; color: #1B1A2E; margin-bottom: 4px; }
.sd-the span { font: 13px/1.5 ui-monospace, Consolas, monospace; color: #4F46E5; }
.sd-the p { margin: 0; font-size: 14px; line-height: 1.5; color: #2A2840 !important; }
.sd-the p.dang { background: #EEF0FF; border-radius: 4px; box-shadow: -4px 0 0 #EEF0FF, 4px 0 0 #EEF0FF; }
/* demo */
.sd-cua { max-width: 900px; margin: 0 auto; background: var(--sd-o); border: 1px solid var(--sd-vien); border-radius: 18px; overflow: hidden; box-shadow: 0 40px 80px -50px rgba(30,27,75,.55); }
.sd-cua-tren { display: flex; align-items: center; gap: 6px; padding: 10px 14px; border-bottom: 1px solid var(--sd-vien); font-size: 13px; color: var(--sd-mo); }
.sd-cua-tren b { margin-left: 8px; color: var(--sd-chu); font-weight: 600; }
.sd-cua-dai { margin-left: auto; }
.sd-cham { width: 10px; height: 10px; border-radius: 50%; background: var(--sd-vien); }
.sd-tien { padding: 12px 16px 6px; }
.sd-tien-chu { display: flex; justify-content: space-between; font-size: 14px; color: var(--sd-chu); margin-bottom: 6px; }
.sd-tien-chu span + span { color: var(--sd-mo); }
.sd-tien-thanh { height: 8px; border-radius: 4px; background: var(--sd-nhat); overflow: hidden; }
.sd-tien-thanh i { display: block; height: 100%; width: 0; background: var(--sd-cham); transition: width .18s linear; }
.sd-tab { display: inline-flex; margin: 10px 16px 0; background: var(--sd-nen); border: 1px solid var(--sd-vien); border-radius: 10px; padding: 3px; }
.sd-tab button { border: 0; background: transparent; color: var(--sd-mo); font: 600 13px Inter, sans-serif; padding: 7px 14px; border-radius: 8px; cursor: pointer; }
.sd-tab button[aria-selected="true"] { background: var(--sd-o); color: var(--sd-chu); box-shadow: 0 1px 3px rgba(0,0,0,.12); }
.sd-ra { height: 320px; overflow: auto; padding: 12px 16px; margin-top: 8px; border-top: 1px solid var(--sd-vien); }
.sd-dong { display: grid; grid-template-columns: 56px 1fr; gap: 10px; padding: 4px 0; animation: hien .25s ease-out; }
.sd-dong span { font: 14px/1.55 ui-monospace, Consolas, monospace; color: var(--sd-cham); }
.sd-dong p { margin: 0; font-size: 15px; line-height: 1.55; color: var(--sd-chu) !important; }
@keyframes hien { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
.sd-ra pre { margin: 0; white-space: pre-wrap; font: 13px/1.6 ui-monospace, Consolas, monospace; color: var(--sd-chu); }
.sd-trong { text-align: center; margin-top: 120px !important; }
.sd-cua-duoi { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; padding: 12px 16px; border-top: 1px solid var(--sd-vien); font-size: 13px; color: var(--sd-mo); }
.sd-nut-thu { border: 0; background: var(--sd-cham); color: var(--sd-tren); font: 700 15px Inter, sans-serif; padding: 10px 16px; border-radius: 10px; cursor: pointer; }
.sd-nut-thu:disabled { opacity: .6; cursor: default; }
/* trên máy */
.sd-may { display: grid; gap: 34px; align-items: center; }
.sd-so { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.sd-so li { background: var(--sd-o); border: 1px solid var(--sd-vien); border-radius: 16px; padding: 18px 20px; display: grid; grid-template-columns: 110px 1fr; align-items: center; gap: 14px; }
.sd-so b { font-size: 36px; letter-spacing: -.03em; color: var(--sd-cham); }
.sd-so span { color: var(--sd-mo); font-size: 15px; }
/* lời chê */
.sd-nguon { max-width: 72ch; }
.sd-chung-luoi { display: grid; gap: 14px; margin-top: 24px; }
.sd-chung-luoi > div { background: var(--sd-o); border: 1px solid var(--sd-vien); border-radius: 16px; padding: 20px; }
.sd-chung-luoi b { font-size: 36px; color: var(--sd-cham); letter-spacing: -.03em; }
.sd-chung-luoi p { margin: 6px 0 12px; color: var(--sd-chu) !important; }
.sd-chung-luoi span { font-size: 14px; color: var(--sd-xanh); font-weight: 600; }
/* lưới tính năng */
.sd-luoi { display: grid; gap: 16px; }
.sd-o { background: var(--sd-o); border: 1px solid var(--sd-vien); border-radius: 18px; padding: 22px; display: flex; flex-direction: column; gap: 10px; overflow: hidden; }
.sd-o h3 { font-size: 18px; margin: 0; }
.sd-o p { margin: 0; font-size: 15px; }
.sd-o img { width: 100%; height: auto; border-radius: 10px; border: 1px solid var(--sd-vien); margin-top: auto; }
.sd-srt pre { margin: auto 0 0; font: 13px/1.6 ui-monospace, Consolas, monospace; background: var(--sd-nen); border: 1px solid var(--sd-vien); border-radius: 10px; padding: 12px; color: var(--sd-chu); }
.sd-srt { margin-top: auto; }
.sd-sua { margin-top: auto !important; background: var(--sd-nen); border-radius: 10px; padding: 12px; color: var(--sd-chu) !important; }
.sd-sua del { color: #B91C1C; } .sd-sua ins { color: var(--sd-xanh); text-decoration: none; background: rgba(21,128,61,.12); border-radius: 3px; padding: 0 3px; }
.sd-kb { list-style: none; padding: 0; margin: auto 0 0; display: grid; gap: 6px; }
.sd-kb li { display: flex; justify-content: space-between; background: var(--sd-nen); border: 1px solid var(--sd-vien); border-radius: 8px; padding: 8px 12px; font-size: 14px; color: var(--sd-chu); }
.sd-kb li i { font-style: normal; color: var(--sd-mo); }
.sd-kb li.dang { border-color: var(--sd-cham); background: var(--sd-nhat); }
.sd-toc { margin-top: auto; display: flex; gap: 6px; flex-wrap: wrap; }
.sd-toc span { font-size: 13px; padding: 7px 12px; border-radius: 999px; border: 1px solid var(--sd-vien); color: var(--sd-mo); }
.sd-toc span.dang { background: var(--sd-cham); border-color: var(--sd-cham); color: var(--sd-tren); }
/* nếu đã lỡ */
.sd-lo { background: var(--sd-o); border: 1px solid var(--sd-vien); border-radius: 20px; padding: 32px 28px; }
.sd-lo ol { margin: 0; padding-left: 22px; display: grid; gap: 12px; }
.sd-lo li { color: var(--sd-mo); }
.sd-lo li b { color: var(--sd-chu); }
/* form "Notify me" (chuẩn clane: build.py nut_mua) ở đầu trang */
.sc .cho-hang input { background: var(--sd-o); border-color: var(--sd-vien); color: var(--sd-chu); }
.sc .cho-hang button { background: var(--sd-cham); color: var(--sd-tren); }
.sc .cho-nhan { color: var(--sd-chu); }
/* giá */
.sd-gia { background: var(--sd-cham-dam); border-radius: 24px; padding: 40px 32px; }
.sd-gia h2 { color: #fff !important; }
.sd-gia p { color: #C7D2FE !important; max-width: 58ch; margin-bottom: 24px; }
.sd-gia .sc-nut { background: #fff; color: #1E1B4B !important; } .sd-gia .sc-nut b { color: #1E1B4B; }
.sd-gia form.cho .cho-nhan { color: #E0E7FF; }
.sd-gia .cho-hang input { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.25); color: #fff; }
.sd-gia .cho-hang button { background: #fff; color: #1E1B4B; }
.sd-gia .cho-nho { color: #A5B4FC !important; } .sd-gia .cho-xong { color: #86EFAC !important; }
/* hỏi đáp */
.sd-hoi details { border-top: 1px solid var(--sd-vien); padding: 16px 0; }
.sd-hoi summary { font-weight: 600; cursor: pointer; color: var(--sd-chu); }
.sd-hoi details p { margin: 10px 0 0; }
@media (min-width: 900px) {
  .sd-dau { grid-template-columns: 1.05fr .95fr; gap: 56px; }
  .sd-anh { aspect-ratio: 4 / 4.4; }
  .sd-may { grid-template-columns: 1.2fr .8fr; gap: 56px; }
  .sd-chung-luoi { grid-template-columns: repeat(3, 1fr); }
  .sd-luoi { grid-template-columns: repeat(3, 1fr); }
  .sd-luoi > h2 { grid-column: 1 / -1; }
  .sd-o-to { grid-column: 1 / -1; display: grid; grid-template-columns: .8fr 1.6fr; align-items: center; gap: 28px; }
  .sd-o-to img { margin: 0; }
  .sd-o-rong { grid-column: span 2; }
  .sd-o-chu { display: flex; flex-direction: column; gap: 10px; }
  .sd-lo { padding: 44px 48px; }
  .sd-gia { padding: 56px 60px; }
}
@media (prefers-reduced-motion: reduce) { .sd-dong { animation: none; } .sd-tien-thanh i { transition: none; } }
/* video thật (quay trong máy Windows, saidly/tools/quay-demo.ps1) */
.sd-xem video { width: 100%; height: auto; border-radius: 16px; border: 1px solid var(--sd-vien); background: #000; display: block; }
.sd-xem p { text-align: center; font-size: 14px; margin-top: 10px; }
.sd-may .sd-so { margin-top: 24px; }
.sd-dau .sd-cua { width: 100%; }
.sd-dau .sd-ra { height: 300px; }
@media (min-width: 900px) { .sd-dau { grid-template-columns: .9fr 1.1fr; } .sd-may { grid-template-columns: 1.1fr .9fr; } }