/* The Real Law Assistant — giao diện. Phong cách: "Legal Services" (navy tin cậy + vàng đồng), chữ EB Garamond (tiêu đề) + Source Sans 3 (nội dung).
   Mọi màu là token; sáng/tối theo hệ thống; trong Telegram (html[data-tg]) lấy màu theo chủ đề Telegram. */
:root {
  --bg: #F6F8FB; --card: #FFFFFF; --fg: #0F172A; --fg2: #475569; --muted: #E9EEF5; --border: #D3DCE8;
  --primary: #1E3A8A; --primary-h: #172F6F; --on-primary: #FFFFFF; --primary-soft: #E8EEFB;
  --accent: #B45309; --accent-soft: #FBF1E3; --link: #1D4ED8;
  --ok: #15803D; --ok-soft: #E6F4EA; --err: #B91C1C; --err-soft: #FDECEC; --warn: #92400E; --warn-soft: #FEF3C7;
  --ring: #1E3A8A; --sh: 0 1px 2px rgba(15,23,42,.06), 0 6px 18px rgba(15,23,42,.06);
  --r: 14px; --r-sm: 9px;
  --f-body: "Source Sans 3", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --f-head: "EB Garamond", Georgia, "Times New Roman", serif;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0B1220; --card: #121C31; --fg: #E6EBF5; --fg2: #A3B1C9; --muted: #1A2640; --border: #2A3A5C;
    --primary: #4F7BE8; --primary-h: #6B90EE; --on-primary: #06112B; --primary-soft: #16264A;
    --accent: #E5A24A; --accent-soft: #2A2112; --link: #8FB0FF;
    --ok: #4ADE80; --ok-soft: #12301F; --err: #F87171; --err-soft: #33161A; --warn: #FBBF24; --warn-soft: #2E2410;
    --ring: #8FB0FF; --sh: 0 1px 2px rgba(0,0,0,.4), 0 6px 18px rgba(0,0,0,.35);
  }
}
html[data-tg] {
  --bg: var(--tg-theme-secondary-bg-color, #F6F8FB); --card: var(--tg-theme-bg-color, #fff); --fg: var(--tg-theme-text-color, #0F172A);
  --fg2: var(--tg-theme-hint-color, #475569); --primary: var(--tg-theme-button-color, #1E3A8A);
  --on-primary: var(--tg-theme-button-text-color, #fff); --link: var(--tg-theme-link-color, #1D4ED8);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.55 var(--f-body); min-height: 100vh; min-height: 100dvh;
  display: flex; flex-direction: column; overflow-wrap: anywhere; }
h1, h2, h3, h4 { font-family: var(--f-head); font-weight: 600; line-height: 1.2; margin: 0 0 .5em; letter-spacing: .005em; }
h1 { font-size: clamp(2rem, 5vw, 3rem); } h2 { font-size: clamp(1.5rem, 3.4vw, 2rem); } h3 { font-size: 1.3rem; } h4 { font-size: 1.1rem; }
p { margin: 0 0 1em; } a { color: var(--link); text-underline-offset: 3px; }
img { max-width: 100%; height: auto; }
.an { position: absolute; width: 0; height: 0; overflow: hidden; }
.ic { width: 1.25em; height: 1.25em; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex: none; vertical-align: -.2em; }
.nho { font-size: .9rem; color: var(--fg2); } .giua { text-align: center; } .dam { font-weight: 600; }
.chi-sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
:focus-visible { outline: 3px solid var(--ring); outline-offset: 2px; border-radius: 6px; }
[hidden] { display: none !important; }
.wrap { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 16px; }
.wrap-hep { max-width: 760px; }
main { flex: 1; padding: 24px 0 48px; min-width: 0; }

/* ------------------------------------------------ đầu trang */
.top { background: var(--card); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 30; }
.top .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: 0 12px; min-height: 56px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--fg); margin-right: auto; padding: 8px 0; }
.logo-dau { width: 34px; height: 34px; border-radius: 9px; background: var(--primary); color: var(--on-primary); display: grid; place-items: center; }
.logo-dau .ic { width: 20px; height: 20px; }
.logo b { font: 600 1.3rem/1 var(--f-head); display: block; } .logo small { display: block; font-size: .78rem; color: var(--fg2); letter-spacing: .02em; }
.nav { display: flex; gap: 2px; overflow-x: auto; scrollbar-width: none; order: 3; flex: 1 1 100%; padding: 0 0 6px; }
.nav::-webkit-scrollbar { display: none; }
.nav a { flex: none; padding: 9px 13px; border-radius: 999px; color: var(--fg2); text-decoration: none; font-weight: 600; font-size: .96rem; min-height: 44px; display: flex; align-items: center; }
.nav a:hover { background: var(--muted); color: var(--fg); }
.nav a[aria-current="page"] { background: var(--primary-soft); color: var(--primary); }
html[data-tg] .nav a[aria-current="page"] { color: var(--fg); }
.nang-luong { display: flex; align-items: center; gap: 8px; font-size: .88rem; color: var(--fg2); text-decoration: none; padding: 4px 10px; border-radius: 999px; background: var(--muted); }
.nang-luong b { color: var(--fg); }
.meter { width: 54px; height: 8px; border-radius: 99px; background: var(--border); overflow: hidden; display: block; }
.meter i { display: block; height: 100%; width: var(--p, 0%); background: var(--ok); border-radius: 99px; transition: width .4s ease; }
.meter.vua i { background: var(--accent); } .meter.sap-het i { background: var(--err); }
.meter.to { width: 100%; height: 12px; }
.top-nguoi { display: flex; align-items: center; gap: 8px; }
@media (min-width: 900px) { .nav { order: 0; flex: 1 1 auto; justify-content: center; padding: 0; } }

/* ------------------------------------------------ nút, form */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 10px 20px; border-radius: 999px;
  border: 1.5px solid transparent; font: 600 1rem/1.2 var(--f-body); cursor: pointer; text-decoration: none; transition: background .15s, border-color .15s, transform .1s; }
.btn:active { transform: scale(.98); }
.btn-chinh { background: var(--primary); color: var(--on-primary); } .btn-chinh:hover { background: var(--primary-h); }
.btn-vien { background: transparent; border-color: var(--border); color: var(--fg); } .btn-vien:hover { background: var(--muted); }
.btn-nguy { background: var(--err); color: #fff; } .btn-nguy:hover { filter: brightness(.92); }
.btn-ok { background: var(--ok); color: #fff; } html:not([data-tg]) .btn-ok:hover { filter: brightness(.92); }
@media (prefers-color-scheme: dark) { .btn-nguy, .btn-ok { color: #06112B; } }
.btn-nho { min-height: 38px; padding: 6px 14px; font-size: .92rem; }
.btn-lon { min-height: 54px; padding: 14px 28px; font-size: 1.1rem; }
.btn[disabled], .btn[aria-disabled="true"] { opacity: .5; cursor: not-allowed; }
.btn-vuong { min-width: 46px; padding: 0; } .btn-vuong.btn-nho { min-width: 38px; }
.form { display: grid; gap: 16px; }
.truong label, .nhan { display: block; font-weight: 600; margin-bottom: 6px; }
.truong .goi-y { font-size: .9rem; color: var(--fg2); margin-top: 4px; }
input[type=text], input[type=number], input[type=datetime-local], input[type=search], select, textarea {
  width: 100%; min-height: 46px; padding: 10px 14px; border: 1.5px solid var(--border); border-radius: var(--r-sm); background: var(--card); color: var(--fg); font: inherit; }
textarea { resize: vertical; min-height: 96px; }
input:focus, select:focus, textarea:focus { border-color: var(--primary); outline: 2px solid var(--ring); outline-offset: 0; }
.chon { display: flex; gap: 12px; align-items: flex-start; padding: 12px 14px; border: 1.5px solid var(--border); border-radius: var(--r-sm); cursor: pointer; background: var(--card); }
.chon input { width: 22px; height: 22px; margin: 1px 0 0; flex: none; accent-color: var(--primary); }
.chon:has(input:checked) { border-color: var(--primary); background: var(--primary-soft); }
.chon span { flex: 1; }
.chon-hang { display: flex; flex-wrap: wrap; gap: 8px; } .chon-hang .chon { padding: 10px 16px; }

/* ------------------------------------------------ khối chung */
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--r); padding: 20px; box-shadow: var(--sh); }
.card + .card { margin-top: 16px; } .luoi > .card + .card, .luoi > .card { margin-top: 0; }
.luoi { display: grid; gap: 16px; } .luoi-2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); } .luoi-4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 210px), 1fr)); }
.tb { padding: 12px 16px; border-radius: var(--r-sm); margin-bottom: 16px; border: 1px solid; display: flex; gap: 10px; align-items: flex-start; }
.tb-ok { background: var(--ok-soft); border-color: var(--ok); color: var(--fg); } .tb-loi { background: var(--err-soft); border-color: var(--err); color: var(--fg); }
.tb-canh { background: var(--warn-soft); border-color: var(--accent); color: var(--fg); } .tb-tin { background: var(--primary-soft); border-color: var(--primary); color: var(--fg); }
.tb .ic { margin-top: 3px; }
.the { display: inline-flex; align-items: center; gap: 6px; padding: 3px 11px; border-radius: 999px; font-size: .85rem; font-weight: 600; background: var(--muted); color: var(--fg2); }
.the-ok { background: var(--ok-soft); color: var(--ok); } .the-cho { background: var(--warn-soft); color: var(--warn); } .the-loi { background: var(--err-soft); color: var(--err); }
@media (prefers-color-scheme: dark) { .the-cho { color: var(--warn); } }
.cuon { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--r-sm); background: var(--card); }
table { border-collapse: collapse; width: 100%; font-size: .95rem; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
th { background: var(--muted); font-weight: 600; white-space: nowrap; font-size: .88rem; color: var(--fg2); }
tr:last-child td { border-bottom: 0; } td.so, th.so { text-align: right; white-space: nowrap; }
.hang-nut { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.phu-de { color: var(--fg2); font-size: 1.1rem; max-width: 62ch; }
details > summary { cursor: pointer; font-weight: 600; min-height: 44px; display: flex; align-items: center; }

/* ------------------------------------------------ trang chủ */
.hero { padding: 36px 0 24px; display: grid; gap: 28px; align-items: center; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero-the { display: inline-flex; gap: 8px; align-items: center; font-weight: 600; font-size: .9rem; color: var(--primary); background: var(--primary-soft); padding: 5px 14px; border-radius: 999px; margin-bottom: 16px; }
html[data-tg] .hero-the { color: var(--fg); }
.demo { background: var(--card); border: 1px solid var(--border); border-radius: var(--r); box-shadow: var(--sh); padding: 18px; }
.demo .bong-u, .demo .bong-a { font-size: .95rem; }
.bong-u { background: var(--primary-soft); border-radius: 14px 14px 4px 14px; padding: 10px 14px; margin-left: 18%; margin-bottom: 10px; }
.bong-a { border: 1px solid var(--border); border-radius: 14px 14px 14px 4px; padding: 12px 14px; background: var(--card); }
.bong-a .can-cu { font-size: .85rem; color: var(--fg2); border-top: 1px dashed var(--border); margin-top: 8px; padding-top: 8px; }
@media (min-width: 880px) { .hero { grid-template-columns: 1.15fr .85fr; padding: 56px 0 36px; } }
.tinh-nang { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); margin: 24px 0; }
.tinh-nang .card { margin: 0; } .tinh-nang .ic { width: 28px; height: 28px; color: var(--accent); margin-bottom: 8px; }
.buoc-ds { counter-reset: b; list-style: none; padding: 0; display: grid; gap: 14px; }
.buoc-ds li { counter-increment: b; display: flex; gap: 14px; align-items: flex-start; }
.buoc-ds li::before { content: counter(b); flex: none; width: 36px; height: 36px; border-radius: 50%; background: var(--primary); color: var(--on-primary); display: grid; place-items: center; font-weight: 700; }
.luu-y { border-left: 4px solid var(--accent); background: var(--accent-soft); padding: 14px 18px; border-radius: 0 var(--r-sm) var(--r-sm) 0; }
.chan { border-top: 1px solid var(--border); padding: 22px 0 30px; color: var(--fg2); font-size: .92rem; background: var(--card); }
.chan .wrap { display: flex; flex-wrap: wrap; gap: 8px 22px; justify-content: space-between; }
.chan a { color: var(--fg2); }

/* ------------------------------------------------ kích hoạt (nhiều bước) */
.buoc-thanh { display: flex; gap: 8px; margin-bottom: 20px; list-style: none; padding: 0; }
.buoc-thanh li { flex: 1; text-align: center; font-size: .85rem; font-weight: 600; color: var(--fg2); padding-top: 12px; border-top: 4px solid var(--border); border-radius: 2px; }
.buoc-thanh li.xong { border-color: var(--ok); color: var(--ok); } .buoc-thanh li.nay { border-color: var(--primary); color: var(--fg); }
.khoa-luoi { display: grid; gap: 10px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr)); }
.khoa-luoi .chon { align-items: center; font-weight: 600; font-size: 1.05rem; }

/* ------------------------------------------------ nội dung markdown của câu trả lời */
.md { line-height: 1.62; } .md > :first-child { margin-top: 0; } .md > :last-child { margin-bottom: 0; }
.md h1, .md h2, .md h3, .md h4 { font-size: 1.15rem; margin: 1.1em 0 .4em; font-family: var(--f-body); font-weight: 700; }
.md h1 { font-size: 1.3rem; } .md ul, .md ol { padding-left: 1.4em; margin: 0 0 1em; } .md li { margin: .25em 0; }
.md blockquote { margin: 0 0 1em; padding: 6px 14px; border-left: 4px solid var(--accent); background: var(--accent-soft); border-radius: 0 8px 8px 0; }
.md code { font-family: ui-monospace, Consolas, monospace; font-size: .9em; background: var(--muted); padding: 1px 6px; border-radius: 5px; }
.md pre { background: var(--muted); padding: 12px; border-radius: 8px; overflow-x: auto; } .md pre code { background: none; padding: 0; }
.md hr { border: 0; border-top: 1px solid var(--border); margin: 1.2em 0; }
.bang-cuon { overflow-x: auto; margin: 0 0 1em; border: 1px solid var(--border); border-radius: 8px; }
.md table { font-size: .93rem; min-width: 440px; } .md th { white-space: normal; color: var(--fg); } .md td, .md th { padding: 8px 10px; }
.hinh { margin: 0 0 1em; } .hinh img { border-radius: 10px; border: 1px solid var(--border); background: #fff; display: block; } .hinh figcaption { font-size: .88rem; color: var(--fg2); margin-top: 6px; }

/* ------------------------------------------------ chat */
body.chat-body { height: 100vh; height: 100dvh; overflow: hidden; }
.chat-trang { flex: 1; min-height: 0; padding: 0; display: grid; grid-template-columns: 270px minmax(0, 1fr); width: 100%; max-width: 1240px; margin: 0 auto; }
.chat-ben { border-right: 1px solid var(--border); background: var(--card); overflow-y: auto; padding: 14px; display: flex; flex-direction: column; gap: 10px; }
.chat-ben h2 { font: 700 .8rem/1 var(--f-body); text-transform: uppercase; letter-spacing: .08em; color: var(--fg2); margin: 4px 0; }
.mon-ds { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.mon-ds li { display: flex; align-items: center; gap: 4px; border-radius: var(--r-sm); }
.mon-ds li.nay { background: var(--primary-soft); }
.mon-ds a.ten { flex: 1; min-width: 0; padding: 10px 12px; color: var(--fg); text-decoration: none; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-height: 44px; display: flex; align-items: center; }
.mon-ds li:hover { background: var(--muted); } .mon-ds li.nay:hover { background: var(--primary-soft); }
.mon-ds .btn-vuong { color: var(--fg2); background: transparent; border: 0; }
.mon-moi { display: flex; gap: 6px; } .mon-moi input { min-height: 42px; }
.chat-giua { display: flex; flex-direction: column; min-height: 0; min-width: 0; }
.chat-thanh { display: flex; flex-wrap: wrap; gap: 8px 14px; align-items: center; padding: 10px 16px; border-bottom: 1px solid var(--border); background: var(--card); }
.chat-thanh .ten-mon { font: 600 1.15rem/1.2 var(--f-head); margin-right: auto; display: flex; align-items: center; gap: 8px; min-width: 0; }
.che-do { display: flex; flex-wrap: wrap; gap: 4px; background: var(--muted); padding: 4px; border-radius: 999px; }
.che-do label { position: relative; }
.che-do input { position: absolute; opacity: 0; inset: 0; cursor: pointer; width: 100%; height: 100%; margin: 0; }
.che-do span { display: flex; align-items: center; min-height: 36px; padding: 0 14px; border-radius: 999px; font-weight: 600; font-size: .92rem; color: var(--fg2); white-space: nowrap; }
.che-do input:checked + span { background: var(--card); color: var(--primary); box-shadow: 0 1px 3px rgba(0,0,0,.18); }
html[data-tg] .che-do input:checked + span { color: var(--fg); }
.che-do input:focus-visible + span { outline: 3px solid var(--ring); }
.nl-chat { display: flex; align-items: center; gap: 8px; font-size: .88rem; color: var(--fg2); }
.nl-chat .meter { width: 70px; }
.tin-nhan { flex: 1; min-height: 0; overflow-y: auto; padding: 18px 16px 8px; scroll-behavior: smooth; }
.tin-nhan > * { max-width: 820px; margin-left: auto; margin-right: auto; }
.chao { text-align: center; padding: 40px 12px; color: var(--fg2); } .chao h2 { color: var(--fg); }
.chao .goi-y-ds { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 16px; }
.chip { border: 1.5px solid var(--border); background: var(--card); color: var(--fg); border-radius: 999px; padding: 8px 16px; font: 600 .93rem var(--f-body); cursor: pointer; min-height: 40px; }
.chip:hover { border-color: var(--primary); background: var(--primary-soft); }
.luot { margin-bottom: 22px; }
.hoi { background: var(--primary-soft); border-radius: 16px 16px 4px 16px; padding: 11px 16px; margin: 0 0 10px 12%; white-space: pre-wrap; }
.hoi small { display: block; color: var(--fg2); margin-top: 4px; }
.tra-loi { background: var(--card); border: 1px solid var(--border); border-radius: 16px 16px 16px 4px; padding: 16px 18px; box-shadow: var(--sh); }
.tra-loi .dang-chay { white-space: pre-wrap; }
.trang-thai-chay { display: flex; align-items: center; gap: 10px; color: var(--fg2); font-size: .95rem; margin-bottom: 6px; }
.cham { display: inline-flex; gap: 4px; } .cham i { width: 7px; height: 7px; border-radius: 50%; background: var(--primary); animation: nhap 1.2s infinite; }
.cham i:nth-child(2) { animation-delay: .15s; } .cham i:nth-child(3) { animation-delay: .3s; }
@keyframes nhap { 0%, 80%, 100% { opacity: .25; transform: scale(.8); } 40% { opacity: 1; transform: scale(1); } }
.tep-ds { display: grid; gap: 8px; margin-top: 12px; }
.tep { display: flex; align-items: center; gap: 12px; padding: 10px 14px; border: 1px solid var(--border); border-radius: var(--r-sm); background: var(--bg); }
.tep .ten { flex: 1; min-width: 0; font-weight: 600; }
.ghi-chu { font-size: .88rem; color: var(--fg2); margin-top: 10px; padding-top: 10px; border-top: 1px dashed var(--border); }
.hanh-dong { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border); }
.hanh-dong .btn { min-height: 40px; padding: 6px 14px; font-size: .92rem; }
.hanh-dong .btn.dung { background: var(--ok-soft); border-color: var(--ok); color: var(--ok); }
.hanh-dong .btn.sai { background: var(--err-soft); border-color: var(--err); color: var(--err); }
.thong-bao-chat { display: flex; gap: 12px; padding: 14px 16px; border-radius: var(--r); border: 1px solid var(--accent); background: var(--accent-soft); margin: 0 auto 18px; }
.thong-bao-chat.loi { border-color: var(--err); background: var(--err-soft); } .thong-bao-chat .ic { width: 24px; height: 24px; margin-top: 2px; color: var(--accent); }
.thong-bao-chat.loi .ic { color: var(--err); } .thong-bao-chat p { margin: 0 0 6px; } .thong-bao-chat p:last-child { margin: 0; }
.soan { border-top: 1px solid var(--border); background: var(--card); padding: 10px 16px calc(10px + env(safe-area-inset-bottom)); }
.soan-hop { max-width: 820px; margin: 0 auto; }
.soan-khung { display: flex; align-items: flex-end; gap: 8px; border: 1.5px solid var(--border); border-radius: 22px; padding: 6px 6px 6px 8px; background: var(--bg); }
.soan-khung:focus-within { border-color: var(--primary); outline: 2px solid var(--ring); }
.soan-khung textarea { border: 0; outline: 0 !important; background: transparent; min-height: 44px; max-height: 190px; padding: 10px 6px; resize: none; }
.soan-khung .btn-vuong { border-radius: 50%; width: 44px; height: 44px; min-height: 44px; }
.btn-dinh-kem { background: transparent; color: var(--fg2); border: 0; } .btn-dinh-kem:hover { background: var(--muted); }
.dinh-kem-ds { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.dinh-kem-ds:empty { display: none; }
.dk { display: inline-flex; align-items: center; gap: 6px; background: var(--muted); border-radius: 999px; padding: 4px 6px 4px 12px; font-size: .88rem; max-width: 100%; }
.dk span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 200px; }
.dk button { border: 0; background: transparent; color: var(--fg2); cursor: pointer; width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; }
.dk.loi { background: var(--err-soft); color: var(--err); } .dk.dang { opacity: .7; }
.soan-chan { display: flex; justify-content: space-between; gap: 12px; font-size: .8rem; color: var(--fg2); margin-top: 6px; padding: 0 6px; flex-wrap: wrap; }
.nut-mon-di-dong { display: none; } .phu-mon { display: none; }
@media (max-width: 860px) {
  .chat-trang { grid-template-columns: minmax(0, 1fr); }
  .chat-ben { position: fixed; left: 0; top: 0; bottom: 0; width: min(310px, 86vw); z-index: 50; transform: translateX(-102%); visibility: hidden; transition: transform .22s ease, visibility .22s; }
  body.mo-mon .chat-ben { transform: none; visibility: visible; box-shadow: 8px 0 30px rgba(0,0,0,.25); }
  .phu-mon { position: fixed; inset: 0; background: rgba(0,0,0,.45); z-index: 45; border: 0; padding: 0; }
  body.mo-mon .phu-mon { display: block; }
  .nut-mon-di-dong { display: inline-flex; }
  .hoi { margin-left: 6%; } .chat-thanh { padding: 8px 12px; } .tin-nhan { padding: 14px 12px 6px; } .tra-loi { padding: 14px; }
  .che-do { width: 100%; } .che-do label { flex: 1 1 calc(50% - 4px); } .che-do span { justify-content: center; padding: 0 8px; }
  .soan { padding-left: 10px; padding-right: 10px; }
}
@media (max-width: 860px) and (min-width: 500px) { .che-do label { flex: 1 1 0; } }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; scroll-behavior: auto !important; } }

/* quiz */
.quiz { margin-top: 14px; border: 1.5px solid var(--primary); border-radius: var(--r); padding: 16px; background: var(--primary-soft); }
.quiz h4 { margin-bottom: 4px; }
.quiz .cau { margin: 16px 0; } .quiz .cau p { font-weight: 600; margin-bottom: 8px; }
.quiz .opt { display: flex; gap: 10px; align-items: center; width: 100%; text-align: left; min-height: 46px; padding: 9px 14px; margin-bottom: 6px; border: 1.5px solid var(--border);
  border-radius: var(--r-sm); background: var(--card); color: var(--fg); font: inherit; cursor: pointer; }
.quiz .opt:hover:not([disabled]) { border-color: var(--primary); }
.quiz .opt.chon-roi { border-color: var(--primary); background: var(--primary-soft); }
.quiz .opt.dung { border-color: var(--ok); background: var(--ok-soft); } .quiz .opt.sai { border-color: var(--err); background: var(--err-soft); }
.quiz .gt { font-size: .93rem; background: var(--card); border-radius: var(--r-sm); padding: 8px 12px; margin-top: 6px; border-left: 4px solid var(--ok); }
.quiz .diem { font: 600 1.3rem var(--f-head); }

/* ------------------------------------------------ gói, mua, đơn */
.goi-tom { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr)); margin: 16px 0; }
.so-lon { font: 600 2.4rem/1 var(--f-head); } .so-lon small { font: 600 1rem var(--f-body); color: var(--fg2); }
.the-goi { position: relative; display: flex; flex-direction: column; gap: 6px; }
.the-goi.noi-bat { border: 2px solid var(--accent); }
.the-goi .gia { font: 600 2rem/1.1 var(--f-head); } .the-goi .gia small { font: 400 .95rem var(--f-body); color: var(--fg2); }
.the-goi .tiet-kiem { position: absolute; top: -12px; right: 14px; background: var(--accent); color: #fff; font-weight: 700; font-size: .82rem; padding: 3px 12px; border-radius: 999px; }
@media (prefers-color-scheme: dark) { .the-goi .tiet-kiem { color: #1b1204; } }
.the-goi form { margin-top: auto; padding-top: 10px; }
.don-luoi { display: grid; gap: 20px; grid-template-columns: minmax(0, 300px) minmax(0, 1fr); align-items: start; }
@media (max-width: 720px) { .don-luoi { grid-template-columns: minmax(0, 1fr); } .don-qr { max-width: 280px; margin: 0 auto; } }
.don-qr img { width: 100%; border-radius: 12px; border: 1px solid var(--border); background: #fff; }
.chep-hang { display: flex; align-items: center; gap: 8px; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid var(--border); }
.chep-hang:last-child { border-bottom: 0; } .chep-hang .btn { flex: none; white-space: nowrap; } .chep-hang code { font: 700 1.05rem ui-monospace, Consolas, monospace; letter-spacing: .02em; }
.chep-hang .nhan-nho { font-size: .85rem; color: var(--fg2); display: block; }

/* ------------------------------------------------ lịch sử, lịch ôn */
.ls-muc { margin-bottom: 12px; } .ls-muc > details { background: var(--card); border: 1px solid var(--border); border-radius: var(--r); padding: 4px 16px; }
.ls-muc summary { display: grid; gap: 2px; padding: 10px 0; list-style: none; } .ls-muc summary::-webkit-details-marker { display: none; }
.ls-muc summary .cau { font-weight: 600; } .ls-muc .noi { padding: 4px 0 14px; }
.lich-ds { display: grid; gap: 10px; list-style: none; padding: 0; margin: 0; }
.lich-ds li { display: flex; gap: 12px; align-items: flex-start; padding: 14px 16px; background: var(--card); border: 1px solid var(--border); border-radius: var(--r); }
.lich-ds li.xong .tieu-de { text-decoration: line-through; color: var(--fg2); } .lich-ds li.qua-han { border-color: var(--err); }
.lich-ds .than { flex: 1; min-width: 0; } .lich-ds .tieu-de { font-weight: 600; font-size: 1.05rem; }

/* ------------------------------------------------ khảo sát */
.sao { display: flex; gap: 8px; flex-wrap: wrap; } .sao .chon { padding: 10px 18px; font-weight: 600; }
.cau-ks { padding: 16px 0; border-bottom: 1px solid var(--border); } .cau-ks:last-of-type { border-bottom: 0; }

/* ------------------------------------------------ quản trị */
.qt-nav { display: flex; gap: 4px; overflow-x: auto; margin-bottom: 20px; padding-bottom: 4px; border-bottom: 1px solid var(--border); }
.qt-nav a { flex: none; padding: 10px 14px; text-decoration: none; color: var(--fg2); font-weight: 600; border-bottom: 3px solid transparent; min-height: 44px; display: flex; align-items: center; gap: 6px; }
.qt-nav a[aria-current="page"] { color: var(--primary); border-color: var(--primary); } html[data-tg] .qt-nav a[aria-current="page"] { color: var(--fg); }
.dem { background: var(--err); color: #fff; border-radius: 99px; font-size: .75rem; padding: 1px 8px; }
.thong-ke { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 170px), 1fr)); margin-bottom: 20px; }
.thong-ke .o { background: var(--card); border: 1px solid var(--border); border-radius: var(--r); padding: 14px 16px; } .thong-ke .o b { display: block; font: 600 1.9rem/1.1 var(--f-head); }
.thong-ke .o span { font-size: .88rem; color: var(--fg2); }
.cot-bd { display: flex; align-items: flex-end; gap: 6px; height: 170px; padding: 8px 4px 0; }
.cot-bd .c { flex: 1; min-width: 0; display: flex; flex-direction: column; justify-content: flex-end; align-items: center; height: 100%; gap: 4px; }
.cot-bd .c i { display: block; width: 100%; max-width: 38px; height: var(--p, 0%); min-height: 3px; background: var(--primary); border-radius: 5px 5px 0 0; }
.cot-bd .c span { font-size: .72rem; color: var(--fg2); white-space: nowrap; } .cot-bd .c b { font-size: .75rem; }
.dong-don.cho-duyet { background: var(--warn-soft); }
.qt-form-hang { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; } .qt-form-hang .truong { flex: 1 1 160px; }

/* ------------------------------------------------ trang lỗi + Mini App */
.trang-trong { text-align: center; padding: 56px 0; } .trang-trong .ma { font: 600 5rem/1 var(--f-head); color: var(--accent); }
.khoi-dong { min-height: 70vh; display: grid; place-items: center; text-align: center; }
.xoay { width: 36px; height: 36px; border-radius: 50%; border: 4px solid var(--border); border-top-color: var(--primary); animation: quay 1s linear infinite; margin: 0 auto 12px; }
@keyframes quay { to { transform: rotate(360deg); } }
.van-ban h2 { margin-top: 1.6em; font-size: 1.4rem; } .van-ban h3 { margin-top: 1.2em; } .van-ban li { margin: .3em 0; }
@media print { .top, .chan { display: none; } }

/* tiện ích (không dùng style inline vì CSP) */
.mt-s { margin-top: 8px; } .mt-m { margin-top: 16px; } .mt-l { margin-top: 24px; } .mb-m { margin-bottom: 16px; }
.t-vua { font-size: clamp(1.6rem, 4.5vw, 2rem); } .t-nho { font-size: 1.6rem; }
.rong { width: 100%; } .can-giua-khoi { margin: 0 auto 20px; }
fieldset { border: 0; padding: 0; margin: 0; min-width: 0; } legend { padding: 0; }

.mb-s { margin-bottom: 8px; }
@media (max-width: 560px) { .nang-luong .meter { display: none; } .top .wrap { gap: 0 8px; } }
.chua-xong { opacity: .25; display: inline-flex; }
.cuon > table { min-width: 620px; }

/* ---- trang chủ v2 (08/10) */
:root { --hl: #FDE68A; --hl-fg: #0F172A; --tc2-bang: #EEF3FC; }
@media (prefers-color-scheme: dark) { :root { --hl: #6B5413; --hl-fg: #FFF3C4; --tc2-bang: #101A30; } }
.tc2-hero { padding: 28px 0 12px; display: grid; gap: 28px; align-items: start; }
.tc2-hero h1 { font-size: clamp(2.1rem, 6.4vw, 3.3rem); line-height: 1.12; margin-bottom: .45em; }
.tc2-hero h1 em { font-style: normal; color: var(--accent); }
.tc2-demo { background: var(--card); border: 1px solid var(--border); border-radius: var(--r); box-shadow: var(--sh); padding: 16px; min-width: 0; }
.tc2-demo .bong-u, .tc2-demo .bong-a { font-size: .95rem; }
.tc2-demo .can-cu { display: flex; flex-wrap: wrap; gap: 6px 8px; align-items: center; }
.tc2-nhan { display: inline-block; font-size: .8rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--accent); background: var(--accent-soft); padding: 3px 11px; border-radius: 999px; margin-bottom: 12px; }
.tc2-link { color: var(--link); font-weight: 600; text-decoration: underline; text-underline-offset: 3px; font-size: .92rem; }
.tc2-mui { display: flex; gap: 8px; align-items: flex-start; font-size: .86rem; color: var(--fg2); margin: 14px 0 8px; }
.tc2-mui .ic { margin-top: 3px; color: var(--primary); }
.tc2-goc { border: 1px solid var(--border); border-left: 4px solid var(--primary); border-radius: var(--r-sm); background: var(--tc2-bang); padding: 12px 14px; font-size: .9rem; line-height: 1.55; }
.tc2-goc p { margin: 6px 0 0; }
mark { background: var(--hl); color: var(--hl-fg); padding: 1px 3px; border-radius: 3px; }
@media (min-width: 900px) { .tc2-hero { grid-template-columns: 1.05fr .95fr; padding: 52px 0 20px; gap: 40px; } }

.tc2-muc { margin: 56px 0 0; scroll-margin-top: 90px; }
.tc2-tieu { max-width: 720px; margin-bottom: 22px; }
.tc2-eyebrow { font-size: .82rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); margin: 0 0 6px; }
.tc2-tieu h2 { margin-bottom: .35em; }
.tc2-tieu .phu-de { margin-bottom: 0; }
.tc2-luoi { display: grid; gap: 16px; list-style: none; padding: 0; margin: 0; }
.tc2-luoi > .card, .tc2-luoi > .card + .card { margin: 0; }
.tc2-luoi-3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 290px), 1fr)); }
.tc2-luoi-2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr)); }
.tc2-luoi-4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 235px), 1fr)); }
.tc2-buoc > li { position: relative; padding-top: 24px; }
.tc2-buoc .ic, .tc2-tl > .ic { width: 28px; height: 28px; color: var(--primary); margin-bottom: 8px; display: block; }
.tc2-buoc h3, .tc2-tl h3 { margin-bottom: .3em; }
.tc2-buoc p, .tc2-tl p { margin-bottom: .7em; color: var(--fg2); }
.tc2-buoc p:last-child, .tc2-tl p:last-child { margin-bottom: 0; }
.tc2-so { position: absolute; top: 18px; right: 18px; width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; font-weight: 700; background: var(--primary-soft); color: var(--primary); }
html[data-tg] .tc2-so { color: var(--fg); }
.tc2-ghi { margin: 16px 0 0; padding: 12px 16px; border-left: 4px solid var(--primary); background: var(--primary-soft); border-radius: 0 var(--r-sm) var(--r-sm) 0; font-size: .95rem; }
.tc2-tl > .ic { color: var(--accent); }

.tc2-tn { display: flex; gap: 16px; align-items: flex-start; }
.tc2-tn > div { min-width: 0; }
.tc2-tn h3 { margin-bottom: .3em; }
.tc2-tn p { margin-bottom: .6em; }
.tc2-tn p:last-child { margin-bottom: 0; }
.tc2-bieu-tuong { flex: none; width: 48px; height: 48px; border-radius: 12px; background: var(--primary-soft); color: var(--primary); display: grid; place-items: center; }
html[data-tg] .tc2-bieu-tuong { color: var(--fg); }
.tc2-bieu-tuong .ic { width: 24px; height: 24px; }
.tc2-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.tc2-chips span { padding: 4px 12px; border-radius: 999px; background: var(--muted); font-weight: 600; font-size: .9rem; }
.tc2-phu-tieu { margin: 34px 0 14px; font-size: 1.25rem; }
.tc2-nho-ds .card { display: flex; flex-direction: column; gap: 4px; padding: 16px; }
.tc2-nho-ds .ic { width: 24px; height: 24px; color: var(--accent); margin-bottom: 4px; }
.tc2-nho-ds span { font-size: .93rem; color: var(--fg2); }

.tc2-bat-dau { margin-top: 0; }
.tc2-bat-dau .nho { font-size: .95rem; }
.tc2-luu-y { margin-top: 56px; }
.tc2-luu-y ul { margin: 0; padding-left: 1.2em; } .tc2-luu-y li { margin: .35em 0; }

.tc2-faq { display: grid; gap: 10px; max-width: 820px; }
.tc2-faq .card, .tc2-faq .card + .card { margin: 0; padding: 4px 18px; }
.tc2-faq summary { list-style: none; min-height: 52px; justify-content: space-between; gap: 12px; font-size: 1.04rem; }
.tc2-faq summary::-webkit-details-marker { display: none; }
.tc2-faq summary::after { content: "+"; flex: none; width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; background: var(--muted); font-size: 1.2rem; line-height: 1; transition: transform .2s; }
.tc2-faq details[open] summary::after { transform: rotate(45deg); }
.tc2-faq details > p { margin: 0 0 14px; color: var(--fg2); }

.tc2-cuoi { margin-top: 56px; padding: 28px 22px; border-radius: var(--r); background: var(--primary); color: var(--on-primary); display: grid; gap: 18px; align-items: center; }
.tc2-cuoi h2 { margin-bottom: .3em; color: inherit; } .tc2-cuoi p { margin: 0; opacity: .92; }
.tc2-nut-sang { background: var(--on-primary); color: var(--primary); } .tc2-nut-sang:hover { filter: brightness(.94); }
.tc2-nut-vien { background: transparent; color: var(--on-primary); border-color: currentColor; } .tc2-nut-vien:hover { background: rgba(255,255,255,.12); }
@media (min-width: 900px) { .tc2-cuoi { grid-template-columns: 1fr auto; padding: 34px 38px; } }

/* ---- tài khoản email (08/10) — đăng ký, xác minh, đăng nhập, quên mật khẩu, tài khoản, bước gói */
input[type=email], input[type=password] {
  width: 100%; min-height: 46px; padding: 10px 14px; border: 1.5px solid var(--border); border-radius: var(--r-sm); background: var(--card); color: var(--fg); font: inherit; }
.mb-0 { margin-bottom: 0; }
.tk-the { padding: 24px 20px; } @media (min-width: 600px) { .tk-the { padding: 30px 32px; } }
.tk-the .phu-de { font-size: 1rem; }
.tk-email { font-weight: 600; overflow-wrap: anywhere; }
.nhan-hang { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; margin-bottom: 6px; }
.nhan-hang label { margin: 0; }
.o-ma { font: 700 1.7rem/1 ui-monospace, Consolas, monospace; letter-spacing: .45em; text-align: center; padding-left: .45em; }
.o-ma::placeholder { color: var(--border); }
.gui-lai { display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; justify-content: space-between; margin: 18px 0 12px; padding-top: 16px; border-top: 1px solid var(--border); }
.tach { display: flex; align-items: center; gap: 12px; margin: 20px 0 16px; color: var(--fg2); font-size: .9rem; }
.tach::before, .tach::after { content: ""; flex: 1; border-top: 1px solid var(--border); }
/* thanh 4 bước: điện thoại chỉ hiện chữ của bước đang ở */
.buoc-thanh li { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.buoc-so { font-weight: 700; }
@media (max-width: 560px) { .buoc-thanh li:not(.nay) .buoc-ten { display: none; } .buoc-thanh li.nay { flex: 2.2; } }
/* trang Tài khoản */
.o-hang { display: grid; gap: 10px; align-items: end; grid-template-columns: minmax(0, 1fr) auto; }
.o-hang .truong { min-width: 0; }
.tk-dong { margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--border); display: flex; flex-wrap: wrap; gap: 6px 10px; align-items: center; }
.tk-dong .nhan { width: 100%; margin: 0; }
.tk-dong form { width: 100%; }
.the .ic { width: 1em; height: 1em; }
.tk-tg { display: flex; gap: 12px; align-items: flex-start; padding: 12px 14px; border: 1px solid var(--border); border-radius: var(--r-sm); background: var(--bg); }
.tk-tg > div { flex: 1; min-width: 0; }
.tk-tg-dau { width: 40px; height: 40px; flex: none; border-radius: 50%; background: var(--primary-soft); color: var(--primary); display: grid; place-items: center; }
html[data-tg] .tk-tg-dau { color: var(--fg); }
/* bước gói: khung "Có mã mời?" nổi bật */
.ma-moi-khung { border: 2px solid var(--accent); }
.ma-moi-khung h2 { margin-bottom: .2em; }
.ma-moi-dau { display: flex; gap: 14px; align-items: flex-start; }
.ma-moi-ic { width: 44px; height: 44px; flex: none; border-radius: 12px; background: var(--accent-soft); color: var(--accent); display: grid; place-items: center; }
.ma-moi-ic .ic { width: 24px; height: 24px; }
.ma-moi-form { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; margin-top: 16px; }
.ma-moi-form input { font: 700 1.15rem ui-monospace, Consolas, monospace; letter-spacing: .08em; text-transform: uppercase; }
.ma-moi-form input::placeholder { font-family: var(--f-body); letter-spacing: 0; text-transform: none; font-weight: 400; }
@media (max-width: 420px) { .ma-moi-form { grid-template-columns: minmax(0, 1fr); } }