/* Khu Huấn Luyện, hướng B "Sân tập buổi sáng" (bản thử ẩn, QĐ-18 Đ22).
   Chữ: Saira (tiêu đề, trục độ rộng 87,5 đến 125) + Be Vietnam Pro (chữ đọc). Cả hai có bộ tiếng Việt.
   Hệ bo góc: khối lớn 28px, thẻ 20px, nút và ô nhập bo tròn hẳn (999px). Không dùng góc vuông.
   Lớp chồng (z-index): 1 cảnh nền, 2 nội dung, 5 thanh tìm dính, 20 thanh điều hướng, 60 hộp giải thích. */

:root {
  --troi-1: #E2DBFF;
  --troi-2: #FFE3D6;
  --troi-3: #FFF4EB;
  --dat: #FFF1E7;
  --mat: rgba(255, 251, 248, .78);
  --mat-dac: #FFFCFA;
  --vien: rgba(110, 58, 88, .13);
  --vien-2: rgba(110, 58, 88, .24);
  --chu: #2A1B38;
  --chu-2: #574560;
  --chu-3: #6B5873;
  --hong: #F58BAF;
  --hong-sang: #FFB3CB;
  --hong-chu: #A8305E;
  --oai: #B9A3F0;
  --dao: #FFC2A1;
  --nang: #F6D98B;
  --bac-ha: #8FD8C6;
  --xanh-troi: #9CC8F2;
  --bong: 74 36 76;
  --f-hien: 'Saira', system-ui, sans-serif;
  --f-than: 'Be Vietnam Pro', system-ui, sans-serif;
  --r-lon: 28px;
  --r: 20px;
  --cham: 44px;
  --nen-nut-am: rgba(255, 251, 248, .94);
  --accent: #D9557F;
  --text-primary: #2A1B38;
  --text-secondary: #6B5873;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --troi-1: #1A1431;
    --troi-2: #35203F;
    --troi-3: #231A33;
    --dat: #261C36;
    --mat: rgba(40, 28, 55, .78);
    --mat-dac: #2C2040;
    --vien: rgba(255, 190, 215, .14);
    --vien-2: rgba(255, 190, 215, .26);
    --chu: #FBEFF5;
    --chu-2: #DCC8DA;
    --chu-3: #C2ADC3;
    --hong-chu: #FFA9C6;
    --bong: 8 4 16;
    --nen-nut-am: rgba(40, 28, 55, .94);
    --accent: #F58BAF;
    --text-primary: #FBEFF5;
    --text-secondary: #C2ADC3;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --troi-1: #1A1431; --troi-2: #35203F; --troi-3: #231A33; --dat: #261C36;
  --mat: rgba(40, 28, 55, .78); --mat-dac: #2C2040; --vien: rgba(255, 190, 215, .14); --vien-2: rgba(255, 190, 215, .26);
  --chu: #FBEFF5; --chu-2: #DCC8DA; --chu-3: #C2ADC3; --hong-chu: #FFA9C6; --bong: 8 4 16;
  --nen-nut-am: rgba(40, 28, 55, .94); --accent: #F58BAF; --text-primary: #FBEFF5; --text-secondary: #C2ADC3;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 96px; }
body {
  margin: 0;
  min-height: 100dvh;
  font: 400 1rem/1.6 var(--f-than);
  color: var(--chu);
  background:
    linear-gradient(180deg, var(--troi-1) 0, var(--troi-2) 620px, var(--troi-3) 1180px) no-repeat,
    var(--troi-3);
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
button, input { font: inherit; color: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 3px solid var(--hong-chu); outline-offset: 3px; }
.sr { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip { position: absolute; left: 12px; top: -60px; z-index: 30; padding: 10px 16px; border-radius: 999px;
  background: var(--chu); color: var(--troi-3); text-decoration: none; font-weight: 600; }
.skip:focus { top: 12px; }
.ic { width: 1.1em; height: 1.1em; flex: none; fill: currentColor; }

/* ------------------------------------------------------------------ dải báo bản thử */
.ban-thu {
  margin: 0; padding: 7px 16px; text-align: center; font-size: .78rem; line-height: 1.45;
  color: var(--chu-2); background: color-mix(in srgb, var(--hong) 16%, transparent);
  border-bottom: 1px solid var(--vien);
}
.ban-thu b { color: var(--hong-chu); font-weight: 600; }

/* ------------------------------------------------------------------ thanh điều hướng */
.topnav {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 18px;
  height: 64px; padding: 0 max(16px, calc((100vw - 1240px) / 2));
  background: color-mix(in srgb, var(--troi-1) 62%, transparent);
  backdrop-filter: blur(14px) saturate(150%); -webkit-backdrop-filter: blur(14px) saturate(150%);
  border-bottom: 1px solid var(--vien);
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; min-height: var(--cham); }
.brand img { width: 34px; height: auto; }
.brand b { font: 700 1.06rem var(--f-hien); font-stretch: 112%; letter-spacing: .01em; }
.topnav .links { display: flex; gap: 4px; margin: 0 auto; }
.topnav .links a {
  text-decoration: none; font-size: .92rem; color: var(--chu-2); padding: 10px 12px; border-radius: 999px;
  min-height: var(--cham); display: inline-flex; align-items: center;
}
.topnav .links a:hover { color: var(--chu); background: color-mix(in srgb, var(--hong) 14%, transparent); }
.topnav .links a[aria-current="page"] { color: var(--chu); font-weight: 600; background: color-mix(in srgb, var(--hong) 22%, transparent); }
.topnav .btn { margin-left: auto; }
.topnav .links + .btn { margin-left: 0; }
@media (max-width: 1023.98px) { .topnav .links { display: none; } }

/* ------------------------------------------------------------------ nút chung */
.nut, .btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  min-height: 48px; padding: 12px 24px; border-radius: 999px; border: 1px solid transparent;
  font: 600 .98rem/1.1 var(--f-hien); font-stretch: 104%; letter-spacing: .01em; text-decoration: none;
  white-space: nowrap; transition: transform .35s cubic-bezier(.16, 1, .3, 1), box-shadow .35s, background-color .35s;
}
.nut.chinh, .btn {
  color: #2A1B38; background: linear-gradient(180deg, #FFB6CD, var(--hong));
  box-shadow: 0 10px 24px -10px rgb(217 85 127 / .6), inset 0 1px 0 rgb(255 255 255 / .65);
}
.nut.chinh:hover, .btn:hover { transform: translateY(-2px); box-shadow: 0 14px 30px -12px rgb(217 85 127 / .7), inset 0 1px 0 rgb(255 255 255 / .7); }
.nut:active, .btn:active { transform: translateY(1px) scale(.98); }
.nut.phu, .btn.ghost {
  color: var(--chu); background: var(--mat); border-color: var(--vien-2); box-shadow: none;
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.nut.phu:hover, .btn.ghost:hover { border-color: var(--hong); }
.topnav .btn { min-height: var(--cham); padding: 10px 18px; font-size: .9rem; }

/* ------------------------------------------------------------------ phần đầu: sân đảo */
.mo-dau { position: relative; isolation: isolate; overflow: clip; padding: 12px 0 64px; }
.canh { position: absolute; inset: 0; z-index: -1; pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, #000 72%, transparent); mask-image: linear-gradient(180deg, #000 72%, transparent); }
.mat-troi {
  position: absolute; right: 4%; top: 2%; width: min(62vw, 640px); aspect-ratio: 1; border-radius: 50%;
  background: radial-gradient(circle, #FFF9EC 0 22%, rgb(255 226 190 / .85) 36%, rgb(255 196 178 / .4) 52%, rgb(255 190 190 / 0) 70%);
  transform: translate3d(calc(var(--px, 0) * -10px), calc(var(--py, 0) * -8px), 0);
}
.may { position: absolute; border-radius: 50%;
  background: radial-gradient(closest-side, rgb(255 255 255 / .85), rgb(255 255 255 / .5) 55%, rgb(255 255 255 / 0)); }
.may.m1 { width: 360px; height: 110px; left: 2%; top: 60%; opacity: .7; }
.may.m2 { width: 300px; height: 90px; right: 2%; top: 64%; opacity: .75; }
.may.m3 { width: 460px; height: 120px; left: 30%; top: 78%; opacity: .6; }
.may.m1 { transform: translate3d(calc(var(--px, 0) * 16px), 0, 0); }
.may.m2 { transform: translate3d(calc(var(--px, 0) * -22px), 0, 0); }
.san-xa {
  position: absolute; left: -20%; right: -20%; bottom: -2px; height: 34%;
  background:
    repeating-linear-gradient(90deg, rgb(242 170 190 / .28) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(0deg, rgb(242 170 190 / .28) 0 1px, transparent 1px 88px),
    radial-gradient(ellipse 60% 70% at 50% 60%, rgb(255 255 255 / .45), transparent 70%);
  transform: perspective(620px) rotateX(64deg); transform-origin: 50% 100%;
  -webkit-mask-image: linear-gradient(0deg, transparent 0, #000 22%, #000 40%, transparent 92%); mask-image: linear-gradient(0deg, transparent 0, #000 22%, #000 40%, transparent 92%);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .mat-troi { background: radial-gradient(circle, rgb(255 214 200 / .55) 0 12%, rgb(255 150 170 / .32) 30%, rgb(200 110 170 / .16) 50%, rgb(120 80 160 / 0) 70%); }
  :root:not([data-theme="light"]) .may { background: rgb(255 200 225 / .12); }
  :root:not([data-theme="light"]) .san-xa { background:
    repeating-linear-gradient(90deg, rgb(255 150 190 / .2) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(0deg, rgb(255 150 190 / .2) 0 1px, transparent 1px 88px),
    radial-gradient(ellipse 60% 70% at 50% 60%, rgb(255 200 225 / .08), transparent 70%); }
}

.hero-luoi {
  max-width: 1240px; margin: 0 auto; padding: 0 32px;
  display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); align-items: center; gap: 12px;
}
.hero-chu { padding: 24px 0 40px; }
.kicker {
  display: inline-flex; align-items: center; gap: 8px; margin: 0 0 14px;
  font: 600 .8rem var(--f-hien); font-stretch: 118%; letter-spacing: .14em; text-transform: uppercase; color: var(--hong-chu);
}
.kicker .ic { width: 16px; height: 16px; }
h1 {
  margin: 0; padding-top: .08em;
  font: 800 clamp(2.55rem, 5.6vw, 4.5rem)/1.06 var(--f-hien); font-stretch: 116%; letter-spacing: -.012em;
  color: var(--chu); text-wrap: balance;
}
h1 .dong { display: block; }
h1 .nho { font-size: .46em; font-weight: 700; font-stretch: 125%; letter-spacing: .16em; text-transform: uppercase; color: var(--hong-chu); margin-bottom: .12em; }
.lede { margin: 18px 0 0; max-width: 34ch; font-size: clamp(1rem, 1.3vw, 1.12rem); line-height: 1.62; color: var(--chu-2); }
.hang-nut { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

.dao { position: relative; margin: 0; aspect-ratio: 1600 / 1248; }
.dao-khung { position: absolute; inset: 0; transform: translate3d(calc(var(--px, 0) * 8px), calc(var(--py, 0) * 6px), 0); }
.dao-anh {
  width: 100%; height: 100%; object-fit: contain;
  -webkit-mask-image: radial-gradient(ellipse 56% 60% at 50% 48%, #000 70%, transparent 100%);
  mask-image: radial-gradient(ellipse 56% 60% at 50% 48%, #000 70%, transparent 100%);
}
.dao-bay { animation: bay-dao 9s ease-in-out infinite; }
@keyframes bay-dao { 0%, 100% { translate: 0 0; } 50% { translate: 0 -10px; } }

/* nhân vật trên bục trung tâm (toạ độ đo từ Blender: tâm bục 48,44% / 46,23%) */
.nv { position: absolute; left: 48.44%; top: 13%; height: 34%; translate: -50% 0; transform-origin: 50% 100%; }
.nv img { height: 100%; width: auto; filter: drop-shadow(0 10px 12px rgb(var(--bong) / .22)); }
.nv-tho { animation: tho-nv 4.2s ease-in-out infinite; transform-origin: 50% 100%; height: 100%; }
@keyframes tho-nv { 0%, 100% { transform: scale(1, 1); } 50% { transform: scale(1.012, 1.006) translateY(-1px); } }
.nv-quang {
  position: absolute; left: 48.44%; top: 43.4%; width: 15%; aspect-ratio: 3 / 1; translate: -50% 0; border-radius: 50%;
  background: radial-gradient(closest-side, rgb(255 139 180 / .7), rgb(255 139 180 / 0)); filter: blur(3px);
  animation: xung 3.6s ease-in-out infinite;
}
@keyframes xung { 0%, 100% { opacity: .55; transform: scale(.92); } 50% { opacity: 1; transform: scale(1.06); } }
.bang-ten {
  position: absolute; left: 48.44%; top: 5.2%; translate: -50% 0; z-index: 2;
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px 6px 6px; border-radius: 999px;
  background: var(--mat-dac); border: 1px solid var(--vien); box-shadow: 0 8px 20px -10px rgb(var(--bong) / .35);
  font: 600 .82rem/1 var(--f-hien); font-stretch: 104%; white-space: nowrap;
}
.bang-ten .so-cap {
  display: grid; place-items: center; width: 26px; height: 26px; border-radius: 50%;
  background: linear-gradient(180deg, #FFD3E1, var(--hong)); color: #2A1B38; font-weight: 800; font-size: .84rem;
}
.be-sao { position: absolute; left: 48.44%; top: 17%; width: 17%; translate: -50% 0; display: none; }
.be-sao svg { width: 100%; height: auto; animation: bay-sao 3.4s ease-in-out infinite; filter: drop-shadow(0 12px 14px rgb(var(--bong) / .25)); }
@keyframes bay-sao { 0%, 100% { transform: translateY(0) rotate(-4deg); } 50% { transform: translateY(-10px) rotate(4deg); } }
.loi-moi {
  position: absolute; left: 60%; top: 8%; max-width: 30%; display: none;
  padding: 10px 14px; border-radius: 18px 18px 18px 6px; background: var(--mat-dac); border: 1px solid var(--vien);
  font-size: .84rem; line-height: 1.45; box-shadow: 0 10px 26px -14px rgb(var(--bong) / .4);
}
[data-vai="khach"] .nv, [data-vai="khach"] .bang-ten.nguoi-choi { display: none; }
[data-vai="khach"] .be-sao, [data-vai="khach"] .loi-moi { display: block; }
.dao figcaption {
  position: absolute; left: 0; right: 0; bottom: 2%; text-align: center; font-size: .78rem; color: var(--chu-3);
  padding: 0 16px;
}
.hat { position: absolute; width: 6px; height: 6px; border-radius: 50%; background: #fff;
  box-shadow: 0 0 10px 3px rgb(255 160 200 / .8); opacity: 0; animation: bay-hat 5s linear infinite; }
@keyframes bay-hat { 0% { opacity: 0; transform: translateY(0) scale(.6); } 20% { opacity: 1; } 100% { opacity: 0; transform: translateY(-120px) scale(1); } }

/* ------------------------------------------------------------------ bảng hành trình (HUD) */
.hud {
  position: relative; z-index: 2; max-width: 1180px; margin: -36px auto 0; padding: 22px 24px 20px;
  border-radius: var(--r-lon); background: var(--mat);
  backdrop-filter: blur(18px) saturate(140%); -webkit-backdrop-filter: blur(18px) saturate(140%);
  border: 1px solid rgb(255 255 255 / .7);
  box-shadow: 0 28px 60px -30px rgb(var(--bong) / .35), inset 0 1px 0 rgb(255 255 255 / .85);
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .hud { border-color: var(--vien); box-shadow: 0 28px 60px -30px rgb(0 0 0 / .6); } }
.hud-dau { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; margin-bottom: 16px; }
.hud-dau h2 { margin: 0; font: 700 1.3rem/1.2 var(--f-hien); font-stretch: 110%; }
.mau-so {
  display: inline-flex; align-items: center; gap: 6px; padding: 5px 11px; border-radius: 999px;
  font: 600 .74rem var(--f-hien); letter-spacing: .04em; color: #6A4A00; background: #FFE7A8; border: 1px solid #F1CF71;
}
.hud-luoi { display: grid; grid-template-columns: 300px minmax(0, 1fr); gap: 22px; align-items: start; }
.cap-khoi { display: grid; grid-template-columns: auto 1fr; gap: 6px 14px; align-items: center; padding: 14px;
  border-radius: var(--r); background: color-mix(in srgb, var(--mat-dac) 70%, transparent); border: 1px solid var(--vien); }
.huy-cap {
  grid-row: span 2; position: relative; width: 74px; height: 74px; border-radius: 50%; border: 0; padding: 0;
  background: conic-gradient(var(--hong) calc(var(--pt) * 1%), color-mix(in srgb, var(--oai) 30%, transparent) 0);
  display: grid; place-items: center;
}
.huy-cap span {
  width: 60px; height: 60px; border-radius: 50%; display: grid; place-items: center; background: var(--mat-dac);
  font: 800 1.7rem/1 var(--f-hien); color: var(--chu);
}
.huy-cap small { position: absolute; bottom: -6px; left: 50%; translate: -50% 0; padding: 2px 8px; border-radius: 999px;
  background: var(--chu); color: var(--troi-3); font: 600 .62rem/1.4 var(--f-hien); letter-spacing: .08em; }
.ten-bac { margin: 0; font: 700 1.12rem/1.2 var(--f-hien); font-stretch: 108%; }
.ten-bac em { display: block; font: 400 .8rem/1.4 var(--f-than); font-style: normal; color: var(--chu-3); }
.ong-xp { grid-column: 1 / -1; margin-top: 8px; }
.ong {
  position: relative; height: 16px; border-radius: 999px; overflow: hidden;
  background: color-mix(in srgb, var(--oai) 22%, transparent); box-shadow: inset 0 1px 3px rgb(var(--bong) / .18);
}
.ong i {
  position: absolute; inset: 0 auto 0 0; width: calc(var(--pt) * 1%); border-radius: inherit;
  background: linear-gradient(90deg, var(--oai), var(--hong) 70%, #FFC7D8);
  box-shadow: inset 0 1px 0 rgb(255 255 255 / .6);
}
.ong i::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit;
  background: linear-gradient(100deg, transparent 20%, rgb(255 255 255 / .55) 45%, transparent 60%);
  background-size: 220% 100%; animation: loang 3.4s ease-in-out infinite;
}
@keyframes loang { 0% { background-position: 120% 0; } 100% { background-position: -80% 0; } }
.so-giai {
  display: inline-flex; align-items: center; gap: 6px; min-height: var(--cham); padding: 8px 12px; margin: 0 -6px;
  border: 0; border-radius: 999px; background: none; font: 600 .9rem var(--f-hien); color: var(--chu);
  text-decoration: underline dotted color-mix(in srgb, var(--hong-chu) 60%, transparent); text-underline-offset: 4px;
}
.so-giai:hover { background: color-mix(in srgb, var(--hong) 14%, transparent); }
.so-giai .ic { width: 15px; height: 15px; color: var(--hong-chu); }
.xp-dong { display: flex; justify-content: space-between; align-items: center; margin-top: 4px; font-size: .8rem; color: var(--chu-3); }

.nv-vu-luoi { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px; }
.nv-vu {
  display: grid; grid-template-columns: 46px minmax(0, 1fr) auto; align-items: center; gap: 4px 10px;
  padding: 6px 6px 6px 8px; border-radius: 18px; background: color-mix(in srgb, var(--mat-dac) 76%, transparent);
  border: 1px solid var(--vien); min-height: 60px;
}
.nv-vu .mini { position: relative; width: 46px; height: 46px; border-radius: 14px; overflow: hidden;
  background: color-mix(in srgb, var(--mau, var(--hong)) 18%, transparent); }
.nv-vu .mini img { position: absolute; left: 50%; top: -14%; width: 150%; height: auto; max-width: none; translate: -50% 0; }
.nv-vu a, .nv-vu .ten-nv { display: flex; flex-direction: column; justify-content: center; min-height: var(--cham); text-decoration: none; min-width: 0; }
.nv-vu b { font: 600 .92rem/1.25 var(--f-hien); font-stretch: 98%; }
.nv-vu .tt { font-size: .76rem; color: var(--chu-3); display: inline-flex; align-items: center; gap: 4px; }
.nv-vu.xong { background: color-mix(in srgb, var(--bac-ha) 20%, var(--mat-dac)); }
.nv-vu.xong .tt { color: #1D6B55; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .nv-vu.xong .tt { color: #9FE7CF; } }
.nv-vu .tt .ic { width: 13px; height: 13px; }
.diem-nut {
  min-width: var(--cham); min-height: var(--cham); padding: 0 10px; border-radius: 999px; border: 1px solid var(--vien-2);
  background: var(--mat-dac); font: 700 .88rem var(--f-hien); color: var(--chu);
}
.diem-nut:hover { border-color: var(--hong); }
.diem-nut.moi { background: linear-gradient(180deg, #FFD0DF, var(--hong)); border-color: transparent; color: #2A1B38; font-size: .76rem; letter-spacing: .03em; }
.hud-chan { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px 16px; margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--vien); }
.hud-chan p { margin: 0; font-size: .82rem; color: var(--chu-3); max-width: 62ch; }
.chon-vai { display: inline-flex; align-items: center; gap: 4px; padding: 4px; border-radius: 999px; background: color-mix(in srgb, var(--oai) 16%, transparent); }
.chon-vai span { font-size: .78rem; color: var(--chu-3); padding: 0 8px 0 10px; }
.chon-vai button { min-height: var(--cham); padding: 8px 14px; border: 0; border-radius: 999px; background: none; font: 600 .84rem var(--f-hien); color: var(--chu-2); }
.chon-vai button[aria-pressed="true"] { background: var(--mat-dac); color: var(--chu); box-shadow: 0 4px 12px -6px rgb(var(--bong) / .4); }
.khach-khoi { display: none; }
[data-vai="khach"] .cap-khoi, [data-vai="khach"] .nv-vu .tt, [data-vai="khach"] .hud-dau .so-giai { display: none; }
[data-vai="khach"] .nv-vu.xong { background: color-mix(in srgb, var(--mat-dac) 76%, transparent); }
[data-vai="khach"] .khach-khoi { display: grid; gap: 10px; padding: 16px; border-radius: var(--r); background: color-mix(in srgb, var(--mat-dac) 70%, transparent); border: 1px dashed var(--vien-2); }
.khach-khoi p { margin: 0; font-size: .9rem; color: var(--chu-2); }
.khach-khoi b { font: 700 1.1rem var(--f-hien); }

/* hộp giải thích con số (QĐ-15) */
[popover].giai {
  position: fixed; inset: auto 16px 16px 16px; margin: 0 auto; max-width: 440px; z-index: 60;
  padding: 18px 18px 16px; border-radius: 22px; border: 1px solid var(--vien-2);
  background: var(--mat-dac); color: var(--chu); box-shadow: 0 30px 70px -20px rgb(var(--bong) / .5);
}
[popover].giai::backdrop { background: rgb(var(--bong) / .22); backdrop-filter: blur(2px); }
.giai h3 { margin: 0 44px 6px 0; font: 700 1.05rem/1.3 var(--f-hien); font-stretch: 106%; }
.giai p { margin: 0; font-size: .92rem; line-height: 1.6; color: var(--chu-2); }
.giai .dong-giai { position: absolute; right: 8px; top: 8px; width: var(--cham); height: var(--cham); border: 0; border-radius: 50%;
  background: none; display: grid; place-items: center; color: var(--chu-2); }
.giai .dong-giai:hover { background: color-mix(in srgb, var(--hong) 16%, transparent); }
@media (min-width: 768px) { [popover].giai { inset: 0; margin: auto; height: fit-content; } }

/* ------------------------------------------------------------------ thanh tìm và lọc */
.dieu-khien { position: relative; z-index: 5; max-width: 1180px; margin: 40px auto 0; padding: 0 20px; }
.dk-trong {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; padding: 10px; border-radius: var(--r-lon);
  background: var(--mat); border: 1px solid var(--vien);
  backdrop-filter: blur(16px) saturate(140%); -webkit-backdrop-filter: blur(16px) saturate(140%);
}
@media (min-width: 768px) { .dieu-khien { position: sticky; top: 72px; } }
.o-tim { position: relative; flex: 1 1 260px; display: flex; align-items: center; }
.o-tim label { position: absolute; left: 16px; display: inline-flex; color: var(--chu-3); }
.o-tim input {
  width: 100%; min-height: 48px; padding: 10px 16px 10px 44px; border-radius: 999px; border: 1px solid var(--vien-2);
  background: var(--mat-dac); font-size: 1rem; color: var(--chu);
}
.o-tim input::placeholder { color: var(--chu-3); opacity: 1; }
.o-tim input:focus-visible { outline: 3px solid color-mix(in srgb, var(--hong) 70%, transparent); outline-offset: 1px; border-color: var(--hong-chu); }
.chips { display: flex; gap: 6px; overflow-x: auto; scrollbar-width: none; flex: 1 1 520px; padding: 2px; -webkit-mask-image: linear-gradient(90deg, #000 90%, transparent); mask-image: linear-gradient(90deg, #000 90%, transparent); }
.chips::-webkit-scrollbar { display: none; }
.chip {
  flex: none; display: inline-flex; align-items: center; gap: 6px; min-height: var(--cham); padding: 4px 14px 4px 6px;
  border-radius: 999px; border: 1px solid var(--vien); background: color-mix(in srgb, var(--mat-dac) 60%, transparent);
  font: 600 .86rem var(--f-hien); font-stretch: 98%; color: var(--chu-2); white-space: nowrap;
}
.chip .mini { position: relative; width: 32px; height: 32px; border-radius: 50%; overflow: hidden; flex: none;
  background: color-mix(in srgb, var(--mau, var(--hong)) 22%, transparent); }
.chip .mini img { position: absolute; left: 50%; top: -14%; width: 150%; height: auto; max-width: none; translate: -50% 0; }
.chip.tat-ca { padding-left: 14px; }
.chip:hover { border-color: var(--vien-2); color: var(--chu); }
.chip[aria-pressed="true"] { background: var(--chu); color: var(--troi-3); border-color: var(--chu); }
.dem-tim { margin: 12px 4px 0; font-size: .82rem; color: var(--chu-3); min-height: 1.3em; }

/* ------------------------------------------------------------------ các khu */
.cac-khu { position: relative; max-width: 1180px; margin: 0 auto; padding: 18px 20px 30px; overflow-x: clip; scroll-margin-top: 150px; }
.duong { position: absolute; left: 0; top: 0; width: 100%; height: 100%; pointer-events: none; overflow: visible; z-index: 0; }
.duong .nen-duong { fill: none; stroke: color-mix(in srgb, var(--dao) 55%, transparent); stroke-width: 22; stroke-linecap: round; }
.duong .buoc { fill: none; stroke: color-mix(in srgb, var(--hong) 75%, transparent); stroke-width: 5; stroke-linecap: round; stroke-dasharray: 0.1 20; }
.khu { position: relative; z-index: 1; margin: 34px 0 64px; width: min(100%, 1000px); scroll-margin-top: 170px; }
.khu:nth-of-type(even) { margin-left: auto; }
/* màn rộng: các khu thành từng "đảo" so le hai bên đường mòn */
@media (min-width: 1100px) {
  .cac-khu { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 64px; align-items: start; }
  .cac-khu > .duong, .cac-khu > .trong { grid-column: 1 / -1; }
  .cac-khu > .duong { grid-row: 1 / span 20; }
  .khu { width: auto; margin: 28px 0 40px; }
  .khu:nth-of-type(even) { margin: 150px 0 40px; }
  .cac-khu .tram-luoi { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  /* khu bên trái: huy hiệu nằm sát đường mòn ở giữa, chữ canh phải */
  .khu:nth-of-type(odd) .khu-dau { grid-template-columns: minmax(0, 1fr) 76px; text-align: right; }
  .khu:nth-of-type(odd) .khu-huy { grid-column: 2; grid-row: 1 / span 2; }
  .khu:nth-of-type(odd) .khu-dau h2, .khu:nth-of-type(odd) .khu-dau p { grid-column: 1; grid-row: auto; }
  .khu:nth-of-type(odd) .khu-dau h2 { grid-row: 1; }
  .khu:nth-of-type(odd) .khu-dau p { grid-row: 2; }
  /* khu bên trái: hàng cuối thiếu thì dồn các trạm về phía đường mòn */
  .khu:nth-of-type(odd) .tram-luoi > li:last-child:nth-child(3n+1) { grid-column: 3; }
  .khu:nth-of-type(odd) .tram-luoi > li:nth-last-child(2):nth-child(3n+1) { grid-column: 2; }
}
.khu[hidden] { display: none; }
.khu-dau { display: grid; grid-template-columns: 76px minmax(0, 1fr); align-items: center; gap: 4px 16px; margin-bottom: 6px; }
.khu-huy { grid-row: span 2; width: 76px; height: 76px; border-radius: 50%; position: relative;
  background: radial-gradient(closest-side, color-mix(in srgb, var(--mau) 38%, var(--mat-dac)), var(--mat-dac));
  border: 1px solid var(--vien); box-shadow: 0 10px 24px -14px rgb(var(--bong) / .45); overflow: hidden; }
.khu-huy img { position: absolute; left: 50%; top: 2%; width: 122%; height: auto; max-width: none; translate: -50% 0; }
.khu-dau h2 { margin: 0; font: 700 clamp(1.4rem, 2.6vw, 1.85rem)/1.15 var(--f-hien); font-stretch: 112%; letter-spacing: -.005em; }
.khu-dau p { margin: 0; color: var(--chu-2); font-size: .95rem; }
.khu-dau .dem { color: var(--chu-3); white-space: nowrap; }
.tram-luoi {
  position: relative; list-style: none; margin: 0; padding: 18px 10px 30px;
  display: grid; grid-template-columns: repeat(auto-fill, minmax(176px, 1fr)); gap: 6px 10px;
}
.tram-luoi::before {
  content: ""; position: absolute; inset: 22% -3% 0; z-index: -1; border-radius: 50%;
  background: radial-gradient(ellipse 50% 50% at 50% 55%, color-mix(in srgb, var(--mau) 12%, transparent) 0, transparent 72%);
}
.tram-luoi > li { display: flex; justify-content: center; }
.tram-luoi > li[hidden] { display: none; }
.tram-luoi > li:nth-child(even) { margin-top: 28px; }
.tram {
  position: relative; width: 100%; max-width: 210px; display: flex; flex-direction: column; align-items: center;
  text-align: center; text-decoration: none; color: inherit; padding: 0 6px 12px; border-radius: 24px;
  -webkit-tap-highlight-color: transparent;
}
.tram-vat { position: relative; width: min(100%, 176px); aspect-ratio: 4 / 5; margin-bottom: -9%; }
/* toạ độ đo từ Blender (lo_nang_luong.py in TOA_DO): mặt bục 69,5%, tâm lõi 34%, đáy bục 91% */
.tram-bong { left: 17%; right: 17%; top: 84%; height: 10%; border-radius: 50%;
  background: radial-gradient(closest-side, rgb(var(--bong) / .26), rgb(var(--bong) / 0)); }
.tram-vat > * { position: absolute; }
.tram-buc, .tram-loi-bao, .tram-loi-bao img { inset: 0; width: 100%; height: 100%; }
.tram-hao { left: 14%; right: 14%; top: 7%; height: 54%; border-radius: 50%;
  background: radial-gradient(closest-side, color-mix(in srgb, var(--mau) 55%, transparent), transparent);
  opacity: .55; transition: opacity .4s, transform .5s cubic-bezier(.16, 1, .3, 1); }
.tram-tia { left: 35%; right: 35%; top: 38%; bottom: 29%;
  background: linear-gradient(0deg, color-mix(in srgb, var(--mau) 55%, transparent), transparent);
  -webkit-mask-image: radial-gradient(ellipse 50% 60% at 50% 70%, #000, transparent); mask-image: radial-gradient(ellipse 50% 60% at 50% 70%, #000, transparent);
  opacity: .35; transition: opacity .4s; }
.tram-quang { left: 26%; right: 26%; top: 65.5%; height: 8%; border-radius: 50%;
  background: radial-gradient(closest-side, color-mix(in srgb, var(--mau) 80%, white), transparent); opacity: .6; }
.tram-loi-bao { transition: transform .55s cubic-bezier(.16, 1, .3, 1); }
.tram-no { left: 50%; top: 34%; width: 62%; aspect-ratio: 1; border-radius: 50%; translate: -50% -50%;
  border: 2px solid color-mix(in srgb, var(--mau) 85%, white); opacity: 0; pointer-events: none; }
.tram-ten { position: relative; margin-top: 2px; font: 600 1.02rem/1.25 var(--f-hien); font-stretch: 94%; max-width: 17ch; text-wrap: balance; }
.tram-mo { margin-top: 4px; font-size: .84rem; line-height: 1.45; color: var(--chu-2); max-width: 25ch; }
.tram-nhan {
  position: absolute; top: 6px; right: 4px; z-index: 2; display: inline-flex; align-items: center; gap: 4px;
  padding: 4px 9px 4px 7px; border-radius: 999px; background: var(--mat-dac); border: 1px solid var(--vien);
  font: 600 .7rem/1 var(--f-hien); letter-spacing: .02em; color: var(--hong-chu); box-shadow: 0 6px 14px -8px rgb(var(--bong) / .45);
}
.tram-nhan .ic { width: 12px; height: 12px; }
.tram-nhan.moi { background: linear-gradient(180deg, #FFD0DF, var(--hong)); color: #2A1B38; border-color: transparent; }
.tram:hover .tram-loi-bao, .tram:focus-visible .tram-loi-bao { transform: translateY(-6%) scale(1.05); }
.tram:hover .tram-hao, .tram:focus-visible .tram-hao { opacity: .95; transform: scale(1.12); }
.tram:hover .tram-tia, .tram:focus-visible .tram-tia { opacity: .7; }
.tram:hover .tram-no, .tram:focus-visible .tram-no, .tram.bung .tram-no { animation: no .75s cubic-bezier(.2, .7, .2, 1); }
.tram:active .tram-loi-bao { transform: translateY(-2%) scale(.97); transition-duration: .12s; }
@keyframes no { 0% { opacity: .95; transform: scale(.4); } 100% { opacity: 0; transform: scale(1.35); } }
.tram.sap-mo { cursor: default; }
.tram.sap-mo .tram-loi-bao { filter: saturate(.55) opacity(.72); }
.tram.sap-mo .tram-ten::after { content: " (sắp mở)"; font-weight: 500; color: var(--chu-3); }
.tram.an { display: none; }

/* chuyển động: chỉ chạy khi khu đang trong tầm mắt */
@media (prefers-reduced-motion: no-preference) {
  .tram-loi-bao img { animation: noi 6.4s ease-in-out infinite; animation-delay: var(--tre, 0s); animation-play-state: paused; }
  .tram-hao, .tram-quang { animation: xung 6.4s ease-in-out infinite; animation-delay: var(--tre, 0s); animation-play-state: paused; }
  .khu.dang-thay .tram-loi-bao img, .khu.dang-thay .tram-hao, .khu.dang-thay .tram-quang { animation-play-state: running; }
  @supports (animation-timeline: view()) {
    .tram-luoi > li { animation: len-tram linear both; animation-timeline: view(); animation-range: entry 0% entry 70%; }
  }
  @supports (animation-timeline: scroll()) {
    .may.m1 { animation: troi-xa linear both; animation-timeline: scroll(root); animation-range: 0 90vh; }
    .may.m3 { animation: troi-gan linear both; animation-timeline: scroll(root); animation-range: 0 90vh; }
    .mat-troi { animation: troi-lan linear both; animation-timeline: scroll(root); animation-range: 0 100vh; }
  }
}
@keyframes len-tram { from { opacity: 0; transform: translateY(34px) scale(.94); } }
@keyframes noi { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-4.5%); } }
@keyframes troi-xa { to { translate: 0 -60px; } }
@keyframes troi-gan { to { translate: 0 -160px; } }
@keyframes troi-lan { to { translate: 0 120px; opacity: .6; } }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
  .hat { display: none; }
  .mat-troi, .may, .dao-khung { transform: none !important; }
}

.trong {
  margin: 40px auto; max-width: 460px; text-align: center; padding: 28px 22px; border-radius: var(--r-lon);
  background: var(--mat); border: 1px dashed var(--vien-2);
}
.trong b { display: block; font: 700 1.15rem var(--f-hien); margin-bottom: 6px; }
.trong p { margin: 0 0 14px; color: var(--chu-2); }

/* ------------------------------------------------------------------ phòng hồ sơ (hub.js + theodoi.js thật) */
.phong { max-width: 1180px; margin: 20px auto 0; padding: 0 20px; }
.phong-dau h2 { margin: 0; font: 700 clamp(1.5rem, 2.8vw, 2rem)/1.15 var(--f-hien); font-stretch: 112%; }
.phong-dau p { margin: 8px 0 18px; color: var(--chu-2); max-width: 62ch; }
.mecard, .tdkhoi {
  padding: clamp(18px, 3vw, 28px); border-radius: var(--r-lon); background: var(--mat);
  border: 1px solid var(--vien); box-shadow: 0 20px 50px -34px rgb(var(--bong) / .4);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
}
.mecard h2 { margin: 0 0 10px; font: 700 clamp(1.25rem, 2.6vw, 1.6rem)/1.2 var(--f-hien); font-stretch: 108%; }
.mecard h3, .tdkhoi h3 { margin: 0 0 8px; font: 700 1.05rem var(--f-hien); font-stretch: 104%; }
.mecard .lede { margin: 0 0 18px; max-width: 62ch; font-size: .95rem; }
.hint { margin: 0 0 14px; color: var(--chu-2); font-size: .9rem; line-height: 1.6; }
.metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 0 0 20px; }
.metric { padding: 14px; border-radius: 18px; background: var(--mat-dac); border: 1px solid var(--vien); }
.metric .n { display: flex; align-items: baseline; gap: 6px; }
.metric b { font: 700 clamp(1.5rem, 4vw, 2rem)/1 var(--f-hien); }
.metric .unit { font-size: .76rem; color: var(--chu-3); }
.metric .lab { display: block; margin-top: 6px; font-size: .76rem; color: var(--chu-3); line-height: 1.4; }
.me-cols { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(20px, 4vw, 38px); margin-top: 22px; padding-top: 20px; border-top: 1px solid var(--vien); }
.mecard .row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.mecard .row.small { gap: 18px; margin-top: 14px; }
.mecard .chips { flex-wrap: wrap; overflow: visible; -webkit-mask-image: none; mask-image: none; }
.mecard .chip { padding: 4px 16px; }
.chip.add { border-style: dashed; }
.lnk { background: none; border: 0; padding: 10px 0; min-height: var(--cham); color: var(--chu-2); text-decoration: underline; text-underline-offset: 3px; }
.lnk:hover { color: var(--hong-chu); }
.lnk.warn { color: #A3334F; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .lnk.warn { color: #FF9DB0; } }
.btn.small { min-height: var(--cham); padding: 10px 18px; font-size: .88rem; }
.btn.small.warn { background: #B8345A; color: #fff; }
.sbar { display: flex; align-items: center; gap: 6px 10px; flex-wrap: wrap; margin: 0 0 12px; font-size: .88rem; }
.sbar .dot { width: 9px; height: 9px; border-radius: 50%; flex: none; }
.sbar .dot.on { background: #3FA37E; box-shadow: 0 0 0 3px rgb(63 163 126 / .18); }
.sbar .dot.off { background: #D98A4E; box-shadow: 0 0 0 3px rgb(217 138 78 / .18); }
.inline-form { display: flex; gap: 9px; align-items: center; flex-wrap: wrap; margin-top: 14px; }
.inline-form input { flex: 1 1 150px; min-width: 0; min-height: var(--cham); padding: 10px 16px; border-radius: 999px; border: 1px solid var(--vien-2); background: var(--mat-dac); }
.danger-box { margin-top: 16px; padding: 16px; border-radius: 18px; background: color-mix(in srgb, #FF8FA8 14%, var(--mat-dac)); border: 1px solid rgb(184 52 90 / .3); }
.danger-box p { margin: 0 0 6px; font-size: .9rem; }
.first-note { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin: 0 0 14px; padding: 14px 16px; border-radius: 18px; background: var(--mat); border: 1px solid var(--vien); }
.first-note p { margin: 0; flex: 1 1 260px; font-size: .9rem; }
.pass-box { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--vien); }
.ma-box { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin: 14px 0 4px; padding: 12px 16px; border-radius: 16px; background: var(--mat-dac); border: 1px solid var(--vien); }
.ma-box code { font: 700 1.05rem var(--f-hien); letter-spacing: .1em; }
.ok-line { margin-top: 12px; font-size: .86rem; color: #1D6B55; }
.err-line { margin-top: 10px; font-size: .86rem; color: #A3334F; }
.err-line:empty { margin: 0; }
#theodoi:not(:empty) { margin-top: 18px; }
.tdkhoi { margin-top: 18px; }
.tddang, .tdtrong { color: var(--chu-2); font-size: .9rem; margin: 0; }
.tdchu { margin: 12px 0 0; color: var(--chu-2); font-size: .86rem; }
.tdcuoi { margin: 16px 2px 0; color: var(--chu-3); font-size: .8rem; }
.tdsvg { width: 100%; height: auto; display: block; overflow: visible; }
.tdke { stroke: rgb(217 85 127 / .16); stroke-width: 1; }
.tdnhan { fill: var(--chu-3); font-family: var(--f-than); font-size: 11px; }
.tdduong { fill: none; stroke: var(--accent); stroke-width: 2.4; stroke-linejoin: round; stroke-linecap: round; }
.tdvung { fill: rgb(245 139 175 / .14); stroke: none; }
.tdcham { fill: var(--accent); }
.tdcham.cuoi { fill: var(--mat-dac); stroke: var(--accent); stroke-width: 2.5; }
.tdlich { display: flex; gap: 4px; align-items: flex-start; overflow-x: auto; padding-bottom: 4px; }
.tdlich-thu { display: flex; flex-direction: column; gap: 4px; flex: none; margin-right: 4px; }
.tdlich-thu span { height: 14px; line-height: 14px; font-size: 9px; color: var(--chu-3); }
.tdlich-tuan { display: flex; flex-direction: column; gap: 4px; flex: none; }
.tdlich .o { width: 14px; height: 14px; border-radius: 4px; display: block; background: color-mix(in srgb, var(--oai) 18%, transparent); border: 1px solid var(--vien); }
.tdlich .o.co { background: var(--accent); border-color: var(--accent); }
.tdlich .o.mai { background: transparent; border-color: transparent; }
.tdmoc { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.tdm { padding: 12px 13px; border-radius: 16px; background: var(--mat-dac); border: 1px solid var(--vien); }
.tdm b { display: block; font-size: .86rem; font-weight: 600; color: var(--chu-2); }
.tdm span { display: block; margin-top: 5px; font-size: .78rem; color: var(--chu-3); }
.tdm.dat { border-color: color-mix(in srgb, var(--hong) 60%, transparent); background: color-mix(in srgb, var(--hong) 12%, var(--mat-dac)); }
.tdm.dat b { color: var(--chu); }
.tdm.dat span { color: var(--hong-chu); }

/* ------------------------------------------------------------------ lời mời lớp học + chân trang */
.cta-ari {
  position: relative; max-width: 1180px; margin: 56px auto 0; padding: clamp(24px, 4vw, 44px); border-radius: var(--r-lon);
  display: grid; grid-template-columns: minmax(0, 1.4fr) auto; gap: 18px 32px; align-items: center;
  background: linear-gradient(120deg, color-mix(in srgb, var(--hong) 28%, var(--mat-dac)), color-mix(in srgb, var(--oai) 26%, var(--mat-dac)));
  border: 1px solid var(--vien);
}
.cta-ari h2 { margin: 0 0 8px; font: 700 clamp(1.4rem, 2.8vw, 2rem)/1.15 var(--f-hien); font-stretch: 110%; }
.cta-ari p { margin: 0; color: var(--chu-2); max-width: 56ch; }
.cta-ari .row { display: flex; flex-wrap: wrap; gap: 10px; }
.cta-wrap { padding: 0 20px; }
footer { margin-top: 64px; padding: 36px 20px 110px; border-top: 1px solid var(--vien); background: color-mix(in srgb, var(--dat) 80%, transparent); }
footer .inner { max-width: 1180px; margin: 0 auto; display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 24px; font-size: .9rem; color: var(--chu-2); }
footer p { margin: 0 0 4px; }
footer .inner a { display: inline-flex; align-items: center; min-height: var(--cham); }
footer .flogo { width: 92px; height: auto; margin-bottom: 10px; }
footer .disc { max-width: 1180px; margin: 22px auto 0; font-size: .8rem; color: var(--chu-3); }
.homefab {
  position: fixed; left: 14px; bottom: calc(14px + env(safe-area-inset-bottom)); z-index: 19;
  display: inline-flex; align-items: center; gap: 8px; min-height: 46px; padding: 10px 16px 10px 13px; border-radius: 999px;
  background: var(--nen-nut-am); border: 1px solid var(--vien-2); text-decoration: none; font: 600 .88rem var(--f-hien);
  box-shadow: 0 10px 26px -12px rgb(var(--bong) / .45); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.homefab .ic { width: 18px; height: 18px; color: var(--hong-chu); }

/* ------------------------------------------------------------------ màn hẹp */
@media (max-width: 899.98px) {
  .hero-luoi { grid-template-columns: 1fr; padding: 0 16px; gap: 0; }
  .hero-chu { padding: 18px 0 4px; }
  .mat-troi { top: 46%; right: -10%; width: 92vw; }
  .lede { max-width: 40ch; }
  .dao { margin: 0 -16px; aspect-ratio: 1 / .86; overflow: hidden; }
  .dao-khung { inset: auto; left: -26%; width: 152%; top: -1%; aspect-ratio: 1600 / 1248; }
  .dao-anh { -webkit-mask-image: radial-gradient(ellipse 50% 56% at 50% 46%, #000 72%, transparent 100%); mask-image: radial-gradient(ellipse 50% 56% at 50% 46%, #000 72%, transparent 100%); }
  .dao figcaption { bottom: 1%; }
  .mo-dau { padding-bottom: 44px; }
  .hud-luoi { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .me-cols { grid-template-columns: 1fr; }
  .cta-ari { grid-template-columns: 1fr; }
  footer .inner { grid-template-columns: 1fr; }
}
@media (max-width: 559.98px) {
  .topnav { height: 58px; gap: 10px; }
  .topnav .btn { padding: 8px 14px; font-size: .84rem; }
  .brand b { font-size: .98rem; }
  h1 { font-size: clamp(2.35rem, 11.4vw, 2.9rem); font-stretch: 108%; }
  .hang-nut { gap: 10px; }
  .hang-nut .nut { flex: 1 1 auto; padding: 12px 16px; }
  .hud { margin: -26px 12px 0; padding: 16px 14px; border-radius: 24px; }
  .hud-dau h2 { font-size: 1.14rem; }
  .nv-vu-luoi { display: grid; grid-auto-flow: column; grid-template-columns: none; grid-auto-columns: 82%; gap: 8px;
    overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; padding-bottom: 2px; margin-right: -14px; padding-right: 14px; }
  .nv-vu-luoi::-webkit-scrollbar { display: none; }
  .nv-vu { scroll-snap-align: start; }
  .cap-khoi { padding: 12px; }
  .huy-cap { width: 64px; height: 64px; } .huy-cap span { width: 52px; height: 52px; font-size: 1.5rem; }
  .dieu-khien { padding: 0 12px; margin-top: 30px; }
  .dk-trong { padding: 8px; border-radius: 24px; }
  .chips { flex-basis: 100%; }
  .cac-khu { padding: 8px 12px 20px; }
  .khu { margin: 26px 0 40px; }
  .khu-dau { grid-template-columns: 60px minmax(0, 1fr); gap: 2px 12px; }
  .khu-huy { width: 60px; height: 60px; }
  .khu-dau p { font-size: .88rem; }
  .tram-luoi { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 6px; padding: 10px 0 20px; }
  .tram-luoi::before { inset: 10% 0 0; opacity: .7; }
  .duong { display: none; }
  .tram-vat { width: min(100%, 158px); }
  .tram-ten { font-size: .95rem; }
  .tram-mo { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  .tram-nhan { top: 2px; right: 0; }
  .phong { padding: 0 12px; }
  .cta-wrap { padding: 0 12px; }
}