/* Claude cho văn phòng — trang đề xuất đào tạo.
   Ý tưởng: một bản đề cương khoá học in trên giấy ấm. Navy cho cấu trúc, cam (lấy từ logo) chỉ cho điểm cần nhớ.
   Nội dung sinh từ lo-trinh.md (npm run build); file này chỉ lo phần trình bày. */

/* ---------- Token ---------- */
/* Màu theo logo: navy cho cấu trúc, cam cho điểm cần nhớ. Tên biến giữ như cũ (green = màu chính, mark = màu nhấn). */
:root{
  --paper:#F6F2EA; --paper-2:#EDE7DB; --card:#FFFFFF; --card-2:#F9F6F0;
  --ink:#141C2E; --ink-2:#3A4560; --muted:#646E84; --line:#DAD5CA; --line-2:#E9E4D9;
  --green:#17306A; --green-2:#2A4A8F; --green-soft:#E4E9F3; --deep:#13285A; --deep-2:#0C1A38;
  --mark:#F58A5B; --mark-soft:#FDE3D5; --on-mark:#0C1A38;
  --on-deep:#F6F1E8; --on-deep-2:#A9B7D3; --deep-line:rgba(246,241,232,.15);
  --bad:#B3402E; --ok:#2A6F5E;
  --k-th:#17306A; --k-de:#5D79B3; --k-br:#CFC8B8; --k-pr:#F58A5B; --k-wr:#9FB0D0;
  --shadow:0 1px 0 rgba(20,28,46,.04), 0 12px 32px -20px rgba(20,28,46,.38);
  --fd:"Bricolage Grotesque","Be Vietnam Pro","Segoe UI",Arial,sans-serif;
  --fb:"Be Vietnam Pro","Segoe UI",Roboto,Arial,sans-serif;
  --fm:ui-monospace,"Cascadia Mono",Consolas,"Courier New",monospace;
  --r:14px; --r-s:9px;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --paper:#0E1424; --paper-2:#141C30; --card:#151E34; --card-2:#1A2440;
    --ink:#ECEAE2; --ink-2:#C6CCDA; --muted:#95A0B8; --line:#2A3550; --line-2:#222C44;
    --green:#9DB4E8; --green-2:#B3C6F0; --green-soft:#1E2A48; --deep:#0B1630; --deep-2:#08101F;
    --mark:#F58A5B; --mark-soft:#3D2618; --on-mark:#0C1A38;
    --on-deep:#ECEAE2; --on-deep-2:#A2B0CC; --deep-line:rgba(236,234,226,.14);
    --bad:#E58873; --ok:#7CC4AE;
    --k-th:#7F9BDB; --k-de:#4B66A3; --k-br:#364160; --k-pr:#E07D52; --k-wr:#2E4675;
    --shadow:0 12px 32px -20px rgba(0,0,0,.7);
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --paper:#0E1424; --paper-2:#141C30; --card:#151E34; --card-2:#1A2440;
  --ink:#ECEAE2; --ink-2:#C6CCDA; --muted:#95A0B8; --line:#2A3550; --line-2:#222C44;
  --green:#9DB4E8; --green-2:#B3C6F0; --green-soft:#1E2A48; --deep:#0B1630; --deep-2:#08101F;
  --mark:#F58A5B; --mark-soft:#3D2618; --on-mark:#0C1A38;
  --on-deep:#ECEAE2; --on-deep-2:#A2B0CC; --deep-line:rgba(236,234,226,.14);
  --bad:#E58873; --ok:#7CC4AE;
  --k-th:#7F9BDB; --k-de:#4B66A3; --k-br:#364160; --k-pr:#E07D52; --k-wr:#2E4675;
  --shadow:0 12px 32px -20px rgba(0,0,0,.7);
  color-scheme:dark;
}

/* ---------- Nền tảng ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 16px/1.62 var(--fb);overflow-x:hidden}
h1,h2,h3,h4,h5,p,ul,ol,dl,dd,figure{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%}
a{color:inherit}
[hidden]{display:none!important}
[id]{scroll-margin-top:80px}
.sec[id],.final[id],.hero[id]{scroll-margin-top:67px}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--green-2);outline-offset:3px;border-radius:4px}
.sr{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:12px;top:-60px;z-index:100;background:var(--mark);color:var(--on-mark);padding:8px 14px;border-radius:8px;font-weight:700;text-decoration:none}
.skip:focus{top:12px}

.wrap{max-width:1200px;margin:0 auto;padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px))}
h1,h2,h3{font-family:var(--fd);font-weight:700;letter-spacing:-.022em;text-wrap:balance;line-height:1.12}
h2{font-size:clamp(1.85rem,1.2rem + 2.2vw,2.85rem)}
h3{font-size:1.2rem;letter-spacing:-.012em}
h4{font-size:1rem;font-weight:700;line-height:1.3}
.kicker{display:inline-flex;align-items:center;gap:10px;font-size:.75rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--green-2);margin-bottom:14px}
.kicker::before{content:"";width:22px;height:2px;background:currentColor}
.lead{font-size:1.06rem;color:var(--ink-2);max-width:62ch}
.note{font-size:.88rem;color:var(--muted)}
b,strong{font-weight:700}

/* Nút */
/* Mũi tên dùng chung: một nét SVG, theo màu chữ */
.ic{width:1.15em;height:1.15em;flex:none;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.btn .ic{margin-right:-4px;transition:transform .2s}
.btn:hover .ic{transform:translateX(3px)}
.back{display:inline-flex;align-items:center;gap:8px}
.back .ic{transition:transform .2s}
.back:hover .ic{transform:translateX(-3px)}
.nav-sec{color:var(--muted)!important}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 22px;border-radius:999px;border:1.5px solid transparent;font-weight:700;font-size:.95rem;text-decoration:none;cursor:pointer;transition:transform .15s,background .15s,border-color .15s;white-space:nowrap}
.btn:hover{transform:translateY(-1px)}
.btn-mark{background:var(--mark);color:var(--on-mark)}
.btn-mark:hover{background:#F6DA6E}
.btn-ink{background:var(--green);color:var(--card)}
:root[data-theme="dark"] .btn-ink{color:#0E1A16}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .btn-ink{color:#0E1A16}}
.btn-ink:hover{background:var(--green-2)}
.btn-line{border-color:var(--line);background:var(--card)}
.btn-line:hover{border-color:var(--green)}
.btn-line-dark{border-color:var(--deep-line);color:var(--on-deep)}
.btn-line-dark:hover{border-color:var(--on-deep)}
.pill{display:inline-flex;align-items:center;min-height:36px;padding:0 15px;border-radius:999px;border:1.5px solid var(--line);background:var(--card);font-size:.88rem;font-weight:600;cursor:pointer;transition:background .15s,border-color .15s,color .15s}
.pill:hover{border-color:var(--green-2)}
.pill[aria-pressed="true"]{background:var(--green);border-color:var(--green);color:var(--card)}
:root[data-theme="dark"] .pill[aria-pressed="true"]{color:#0E1A16}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .pill[aria-pressed="true"]{color:#0E1A16}}

/* ---------- Thanh đầu trang ---------- */
.top{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--paper) 88%,transparent);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line-2)}
.top .wrap{display:flex;align-items:center;gap:24px;min-height:66px}
.brand{display:inline-flex;align-items:center;gap:10px;font-family:var(--fd);font-weight:700;font-size:1.06rem;text-decoration:none;letter-spacing:-.01em;white-space:nowrap}
.brand img{width:42px;height:42px;flex:none;display:block}
.nav{display:flex;gap:4px;margin-left:auto}
.nav a{padding:7px 12px;border-radius:999px;font-size:.9rem;font-weight:600;color:var(--ink-2);text-decoration:none}
.nav a:hover{background:var(--paper-2)}
.nav a[aria-current="page"]{background:var(--green-soft);color:var(--green)}
.menu-btn{display:none;order:3;width:42px;height:42px;border-radius:12px;border:1.5px solid var(--line);background:var(--card);cursor:pointer;place-items:center;flex:none}
.menu-btn i,.menu-btn i::before,.menu-btn i::after{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);position:relative;transition:transform .2s,background .2s}
.menu-btn i::before,.menu-btn i::after{content:"";position:absolute;left:0}
.menu-btn i::before{top:-6px}.menu-btn i::after{top:6px}
.top.open .menu-btn i{background:transparent}.top.open .menu-btn i::before{transform:translateY(6px) rotate(45deg)}.top.open .menu-btn i::after{transform:translateY(-6px) rotate(-45deg)}
.top .btn{min-height:40px;padding:0 18px;font-size:.88rem}
.top .btn .s{display:none}

/* ---------- Hero ---------- */
.hero{position:relative;background:var(--deep);color:var(--on-deep);overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(var(--deep-line) 1px,transparent 1px),linear-gradient(90deg,var(--deep-line) 1px,transparent 1px);background-size:44px 44px;mask-image:radial-gradient(ellipse 70% 80% at 20% 30%,#000 10%,transparent 70%);-webkit-mask-image:radial-gradient(ellipse 70% 80% at 20% 30%,#000 10%,transparent 70%);opacity:.55;pointer-events:none}
.hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.04fr) minmax(0,.96fr);gap:56px;align-items:center;padding-block:76px 84px}
.hero .kicker{color:var(--mark)}
.hero h1{font-size:clamp(2.4rem,1.4rem + 3.6vw,4.1rem);font-weight:800;letter-spacing:-.035em;line-height:1.02}
.mk{background:linear-gradient(transparent 58%,var(--mark) 58%,var(--mark) 92%,transparent 92%);color:inherit;padding:0 .06em}
.hero .mk{background:none;color:var(--mark)}
.hero .sub{margin-top:22px;font-size:1.1rem;color:var(--on-deep-2);max-width:54ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.facts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;margin-top:40px;border-top:1px solid var(--deep-line)}
.facts>div{padding:16px 14px 0 0;border-right:1px solid var(--deep-line);padding-left:14px}
.facts>div:first-child{padding-left:0}
.facts>div:last-child{border-right:0}
.facts dt{font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--on-deep-2)}
.facts dd{margin-top:4px;font-family:var(--fd);font-weight:600;font-size:1.02rem;line-height:1.25}

/* Thời khoá biểu in trên giấy */
.tt{background:var(--card);color:var(--ink);border-radius:18px;padding:22px 22px 18px;box-shadow:0 30px 60px -30px rgba(0,0,0,.55);position:relative}
.tt::after{content:"";position:absolute;left:22px;right:22px;top:-7px;height:14px;background:repeating-linear-gradient(90deg,transparent 0 14px,var(--deep) 14px 22px);border-radius:3px;opacity:.9}
.tt figcaption{display:flex;justify-content:space-between;align-items:baseline;gap:10px;margin-bottom:14px;font-family:var(--fd);font-weight:700;font-size:1.05rem}
.tt-hint{font-family:var(--fb);font-size:.76rem;font-weight:500;color:var(--muted)}
.tt-mods{display:grid;gap:8px}
.tt-mod{display:grid;grid-template-columns:96px minmax(0,1fr);gap:8px;align-items:stretch}
.tt-mlabel{display:flex;flex-direction:column;justify-content:center;font-family:var(--fd);font-weight:700;font-size:.92rem;line-height:1.15}
.tt-mlabel small{font-family:var(--fb);font-size:.66rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--green-2);margin-bottom:2px}
.tt-cells{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px}
.tt-cells .tt-cell:only-child{grid-column:1/-1}
.tt-cell{display:block;padding:9px 11px;border-radius:10px;background:var(--green-soft);text-decoration:none;font-size:.86rem;font-weight:600;line-height:1.3;border:1.5px solid transparent;transition:background .15s,border-color .15s,opacity .2s,transform .15s}
.tt-cell small{display:block;font-size:.7rem;font-weight:700;color:var(--green-2);margin-bottom:2px}
.tt-cell:hover{border-color:var(--green-2);transform:translateY(-1px)}
.tt-cell.dim{opacity:.32}
.tt-cell.lit{background:var(--mark-soft);border-color:var(--mark)}
.tt-roles{display:flex;flex-wrap:wrap;gap:6px;margin-top:16px;padding-top:14px;border-top:1px dashed var(--line)}
.tt-roles .pill{min-height:32px;padding:0 12px;font-size:.8rem}
.tt-note{margin-top:10px;font-size:.84rem;color:var(--ink-2);min-height:2.6em}

/* ---------- Tóm tắt ---------- */
.brief{background:var(--card);border-bottom:1px solid var(--line-2)}
.qa{display:grid;grid-template-columns:repeat(5,minmax(0,1fr))}
.qa>div{display:flex;flex-direction:column;gap:6px;padding:26px 20px 24px;border-right:1px solid var(--line-2)}
.qa>div:first-child{padding-left:0}
.qa>div:last-child{border-right:0;padding-right:0}
.qa dt{font-size:.72rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--green-2)}
.qa dd{font-size:.9rem;color:var(--ink-2);line-height:1.5;flex:1}
.qa a{font-size:.82rem;font-weight:700;color:var(--green);text-decoration:none}
.qa a::after{content:" →"}
.qa a:hover{text-decoration:underline}

/* ---------- Khung mục ---------- */
.sec{padding-block:96px}
.sec-white{background:var(--card)}
.sec-deep{background:var(--deep);color:var(--on-deep)}
.sec-deep .kicker{color:var(--mark)}
.sec-deep .lead{color:var(--on-deep-2)}
.sec-head{margin-bottom:48px}
.sec-head.split{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:28px 64px;align-items:end}
.sec-head.split .lead{padding-bottom:6px}

/* ---------- Vấn đề ---------- */
.pains{counter-reset:p;border-top:2px solid var(--ink)}
.pains li{counter-increment:p;display:grid;grid-template-columns:44px minmax(0,.8fr) minmax(0,1.1fr) minmax(0,1.2fr) auto;gap:20px;align-items:baseline;padding:20px 0;border-bottom:1px solid var(--line)}
.pains li::before{content:counter(p,decimal-leading-zero);font-family:var(--fd);font-weight:700;color:var(--muted);font-size:.95rem}
.pains h3{font-size:1.1rem}
.pains .now{color:var(--muted);font-size:.94rem}
.pains .after{font-size:.94rem;font-weight:500}
.pains .after span{display:inline-block;margin-right:8px;padding:1px 8px;border-radius:5px;background:var(--mark);color:var(--on-mark);font-size:.7rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase;vertical-align:1px}
.pains .tag{font-size:.8rem;font-weight:700;color:var(--green);text-decoration:none;padding:4px 10px;border-radius:999px;border:1.5px solid var(--green-soft);white-space:nowrap}
.pains .tag:hover{border-color:var(--green)}

.calc{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);margin-top:56px;border-radius:20px;overflow:hidden;background:var(--card);box-shadow:var(--shadow);border:1px solid var(--line-2)}
.calc-in{padding:32px 34px;display:grid;gap:20px}
.calc-in h3{font-size:1.3rem}
.sl label{display:flex;justify-content:space-between;gap:12px;font-size:.92rem;font-weight:600;color:var(--ink-2)}
.sl output{font-family:var(--fd);font-weight:700;color:var(--ink);white-space:nowrap}
.sl input{width:100%;margin-top:8px;accent-color:var(--green)}
.calc-out{background:var(--deep);color:var(--on-deep);padding:32px 34px;display:flex;flex-direction:column;justify-content:center;gap:16px}
.calc-out .big{font-size:1rem;color:var(--on-deep-2)}
.calc-out .big b{display:block;font-family:var(--fd);font-size:clamp(3rem,2rem + 3vw,4.4rem);line-height:1;color:var(--mark);letter-spacing:-.03em}
.calc-out .pair{display:flex;flex-wrap:wrap;gap:8px 26px;font-size:.92rem;color:var(--on-deep-2)}
.calc-out .pair b{font-family:var(--fd);font-size:1.3rem;color:var(--on-deep);margin-right:4px}
.calc-out .fine{font-size:.78rem;color:var(--on-deep-2);border-top:1px solid var(--deep-line);padding-top:12px}

/* ---------- Mục tiêu ---------- */
.goals{counter-reset:g;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.goals li{counter-increment:g;position:relative;display:flex;flex-direction:column;gap:8px;padding:26px 24px 22px;border-radius:var(--r);background:var(--paper);border:1px solid var(--line-2)}
.goals li::before{content:counter(g);font-family:var(--fd);font-weight:800;font-size:2.4rem;line-height:1;color:var(--green);letter-spacing:-.03em}
.goals h3{font-size:1.14rem}
.goals p{font-size:.93rem;color:var(--ink-2);flex:1}
.goals span{align-self:flex-start;font-size:.76rem;font-weight:700;padding:3px 9px;border-radius:6px;background:var(--green-soft);color:var(--green)}
.fit{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:28px}
.fit>div{padding:24px 26px;border-radius:var(--r);border:1px solid var(--line-2)}
.fit>div:first-child{background:var(--green-soft);border-color:transparent}
.fit h3{font-size:1.05rem;margin-bottom:12px}
.fit ul{display:grid;gap:8px}
.fit li{position:relative;padding-left:26px;font-size:.93rem;color:var(--ink-2)}
.fit li::before{content:"";position:absolute;left:0;top:.42em;width:14px;height:8px;border-left:2.5px solid var(--green);border-bottom:2.5px solid var(--green);transform:rotate(-45deg)}
.fit>div+div li::before{width:14px;height:0;border-left:0;border-bottom:2.5px solid var(--muted);transform:none;top:.75em}

/* ---------- Nguyên tắc thiết kế ---------- */
.principles{counter-reset:pr;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;border-top:1px solid var(--deep-line)}
.principles li{counter-increment:pr;padding:28px 22px 6px 0;border-right:1px solid var(--deep-line);padding-left:22px;display:flex;flex-direction:column;gap:10px}
.principles li:first-child{padding-left:0}
.principles li:last-child{border-right:0}
.principles li::before{content:counter(pr,decimal-leading-zero);font-family:var(--fd);font-weight:800;font-size:2.8rem;line-height:1;color:var(--mark);letter-spacing:-.04em}
.principles h3{font-size:1.1rem;color:var(--on-deep)}
.principles p{font-size:.9rem;color:var(--on-deep-2);line-height:1.55}

/* ---------- Kiến thức nền ---------- */
.eco{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;align-items:center;padding:36px;border-radius:22px;background:var(--card);border:1px solid var(--line-2);box-shadow:var(--shadow)}
.hub{position:relative;width:min(100%,400px);aspect-ratio:1;margin:0 auto;max-width:100%}
.hub::before{content:"";position:absolute;inset:16%;border:1.5px dashed var(--line);border-radius:50%}
.core{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:28%;aspect-ratio:1;border-radius:50%;background:var(--deep);color:var(--mark);display:grid;place-items:center;font-family:var(--fd);font-weight:800;font-size:1.15rem}
.node{position:absolute;left:50%;top:50%;width:132px;margin:-32px 0 0 -66px;padding:9px 8px;border-radius:12px;border:1.5px solid var(--line);background:var(--card);font-weight:700;font-size:.9rem;line-height:1.2;cursor:pointer;transform:rotate(var(--a)) translate(min(150px,34vw)) rotate(calc(-1 * var(--a)));transition:border-color .15s,background .15s;text-align:center}
.node small{display:block;font-size:.68rem;font-weight:500;color:var(--muted);margin-top:3px}
.node:hover{border-color:var(--green-2)}
.node.on{background:var(--mark);border-color:var(--mark);color:var(--on-mark)}
.node.on small{color:var(--on-mark);opacity:.75}
.eco-panel h3{font-size:1.5rem}
.eco-panel>.note{margin:4px 0 20px}
.eco-item h4{font-family:var(--fd);font-size:1.3rem;color:var(--green);margin-bottom:8px}
.eco-item>p{color:var(--ink-2)}
.eco-terms{display:flex;flex-wrap:wrap;gap:6px;margin:14px 0}
.eco-terms li{font-size:.8rem;font-weight:600;padding:3px 10px;border-radius:6px;background:var(--paper-2)}
.eco-s{font-size:.86rem;color:var(--muted)}
.eco-s a{font-weight:700;color:var(--green)}

.models{margin-top:28px;padding:36px;border-radius:22px;background:var(--card);border:1px solid var(--line-2)}
.models-head{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:12px 40px;align-items:end;margin-bottom:22px}
.models-head h3{font-size:1.5rem}
.tasks{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.tiers{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.tier{padding:20px;border-radius:var(--r);border:1.5px solid var(--line-2);background:var(--paper);transition:border-color .2s,background .2s,transform .2s}
.tier h4{font-family:var(--fd);font-size:1.4rem;letter-spacing:-.02em}
.tier-k{font-size:.76rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--green-2);margin:2px 0 8px}
.tier>p:not(.tier-k){font-size:.9rem;color:var(--ink-2);min-height:4.5em}
.tier.on{border-color:var(--green);background:var(--green-soft);transform:translateY(-3px)}
.meter{display:grid;grid-template-columns:64px 1fr;align-items:center;gap:10px;margin-top:10px;font-size:.76rem;font-weight:600;color:var(--muted)}
.meter i{height:7px;border-radius:9px;background:var(--line-2);position:relative;overflow:hidden}
.meter i::after{content:"";position:absolute;inset:0 auto 0 0;width:calc(var(--v) * 100%);background:var(--green);border-radius:inherit}
.why{margin-top:18px;padding:14px 18px;border-radius:var(--r-s);background:var(--mark-soft);font-size:.95rem;border-left:4px solid var(--mark)}

.fourd{margin-top:28px;padding:36px;border-radius:22px;background:var(--card);border:1px solid var(--line-2)}
.fourd-head{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:8px 40px;align-items:end;margin-bottom:22px}
.fourd h3{font-size:1.5rem}
.fourd dl{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.fourd dl>div{padding:18px;border-radius:12px;background:var(--paper);border-top:3px solid var(--green)}
.fourd dt{font-family:var(--fd);font-weight:700;font-size:1.1rem;color:var(--green)}
.fourd dd{font-size:.9rem;color:var(--ink-2);margin-top:6px}

/* ---------- Chương trình ---------- */
.thread{margin-top:72px;padding:32px;border-radius:22px;background:var(--paper);border:1px solid var(--line-2)}
.thread-head{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:10px 40px;align-items:end;margin-bottom:24px}
.thread-head h3{font-size:1.45rem}
.thread-head p{color:var(--ink-2);font-size:.95rem}
.thread-steps{display:grid;grid-template-columns:repeat(9,minmax(150px,1fr));gap:10px;overflow-x:auto;padding:4px 2px 12px;scroll-snap-type:x mandatory;position:relative}
.thread-steps li{scroll-snap-align:start;position:relative}
.thread-steps li>a,.thread-steps li>div{display:flex;flex-direction:column;gap:4px;height:100%;padding:16px 14px;border-radius:12px;background:var(--card);border:1px solid var(--line-2);text-decoration:none;transition:border-color .15s,transform .15s}
.thread-steps li>a:hover{border-color:var(--green-2);transform:translateY(-2px)}
.thread-steps small{font-size:.7rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--green-2)}
.thread-steps b{font-family:var(--fd);font-size:1.02rem;line-height:1.2}
.thread-steps span{font-size:.82rem;color:var(--muted);line-height:1.4}
.thread-steps li.gap>div{background:var(--mark);border-color:var(--mark);color:var(--on-mark)}
.thread-steps li.gap small,.thread-steps li.gap span{color:var(--on-mark);opacity:.8}

.frame{display:grid;grid-template-columns:minmax(0,.75fr) minmax(0,1.35fr) minmax(0,.9fr);gap:0;margin-top:28px;border-radius:22px;overflow:hidden;border:1px solid var(--line-2);background:var(--card)}
.frame>div{padding:28px}
.frame>div+div{border-left:1px solid var(--line-2)}
.frame-time{background:var(--deep);color:var(--on-deep)}
.frame-time h3{font-size:1.15rem;margin-bottom:16px}
.frame-time dl{display:grid;gap:10px}
.frame-time dl>div{display:flex;justify-content:space-between;gap:10px;align-items:baseline;padding-bottom:10px;border-bottom:1px solid var(--deep-line)}
.frame-time dt{font-size:.85rem;color:var(--on-deep-2)}
.frame-time dd{font-family:var(--fd);font-weight:700;font-size:1.2rem;color:var(--mark)}
.dots{display:grid;gap:6px;margin-top:18px}
.dots li{display:block;padding:7px 10px;line-height:1.4;border-radius:10px;background:rgba(255,255,255,.06);font-size:.84rem;color:var(--on-deep-2)}
.dots b{font-family:var(--fd);color:var(--on-deep);font-size:.9rem;margin-right:6px}
.frame-cap{font-size:.76rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--green-2);margin-bottom:10px}
.timebar{display:flex;gap:3px;height:38px;border-radius:10px;overflow:hidden}
.timebar span{display:flex;align-items:center;justify-content:center;font-size:.78rem;font-weight:700;color:#fff;min-width:0}
.tb-th{background:var(--k-th)}.tb-de{background:var(--k-de)}.tb-br{background:var(--k-br);color:var(--ink)!important}.tb-pr{background:var(--k-pr);color:var(--on-mark)!important}.tb-wr{background:var(--k-wr);color:var(--deep-2)!important}
.fmt{display:grid;gap:8px;margin:16px 0 14px}
.fmt li{display:grid;grid-template-columns:12px 92px 40px 1fr;gap:10px;align-items:baseline;font-size:.88rem}
.fmt i{width:12px;height:12px;border-radius:3px;align-self:center}
.fmt em{font-style:normal;font-weight:700;color:var(--muted);font-variant-numeric:tabular-nums}
.fmt span{color:var(--ink-2)}
.frame-bring{background:var(--paper)}
.frame-bring h4{font-size:.76rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--green-2);margin-bottom:12px}
.frame-bring ul{display:grid;gap:10px}
.frame-bring li{position:relative;padding-left:20px;font-size:.88rem;color:var(--ink-2)}
.frame-bring li::before{content:"";position:absolute;left:0;top:.5em;width:9px;height:9px;border-radius:2px;border:2px solid var(--green)}

/* Tab ngày */
.daynav{display:grid;grid-template-columns:repeat(4,minmax(0,1fr)) auto;gap:8px;margin-top:20px;position:sticky;top:66px;z-index:20;background:var(--card);padding-block:10px;border-bottom:1px solid var(--line-2)}
.daynav [role=tab]{display:flex;flex-direction:column;align-items:flex-start;gap:2px;padding:12px 14px;border-radius:12px;border:1.5px solid var(--line-2);background:var(--paper);text-align:left;cursor:pointer;transition:border-color .15s,background .15s}
.daynav [role=tab] small{font-size:.7rem;font-weight:700;letter-spacing:.04em;color:var(--muted)}
.daynav [role=tab] b{font-family:var(--fd);font-size:.98rem;line-height:1.2}
.daynav [role=tab]:hover{border-color:var(--green-2)}
.daynav [role=tab][aria-selected="true"]{background:var(--deep);border-color:var(--deep);color:var(--on-deep)}
.daynav [role=tab][aria-selected="true"] small{color:var(--mark)}
.daynav .expand{padding:0 16px;border-radius:12px;border:1.5px dashed var(--line);background:transparent;font-weight:700;font-size:.85rem;color:var(--green);cursor:pointer}
.daynav .expand:hover{border-color:var(--green)}

.day{margin-top:28px}
.day+.day{margin-top:56px}
.day-head{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:16px 28px;align-items:center;padding-bottom:22px;border-bottom:2px solid var(--ink)}
.day-no{font-size:.76rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);display:flex;flex-direction:column;line-height:1}
.day-no b{font-family:var(--fd);font-size:4.4rem;letter-spacing:-.05em;color:var(--green);line-height:.9;margin-top:4px}
.day-head h3{font-size:1.75rem}
.day-head div>p{margin-top:6px;color:var(--ink-2);max-width:68ch}
.mod-has{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.mod-has li{font-size:.8rem;font-weight:600;padding:4px 11px;border-radius:999px;background:var(--green-soft);color:var(--green)}
.day-time{font-size:.85rem;font-weight:600;color:var(--muted);text-align:right;line-height:1.6}
.day-list{display:grid;gap:22px;margin-top:22px}

/* Phiếu buổi học */
.ses{border-radius:20px;background:var(--card);border:1px solid var(--line);overflow:hidden;scroll-margin-top:150px;transition:opacity .2s,box-shadow .3s,border-color .3s}
.ses.dim{opacity:.38}
.ses.lit{border-color:var(--mark);box-shadow:0 0 0 3px var(--mark-soft)}
.ses.flash{box-shadow:0 0 0 4px var(--mark)}
.ses-head{display:grid;grid-template-columns:76px minmax(0,1fr);gap:4px 22px;padding:26px 28px 22px;border-bottom:1px solid var(--line-2);background:var(--card-2)}
.ses-num{grid-row:span 3;display:flex;flex-direction:column;align-items:center;justify-content:center;width:76px;height:76px;border-radius:16px;background:var(--deep);color:var(--on-deep);line-height:1}
.ses-num small{font-size:.66rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--on-deep-2)}
.ses-num b{font-family:var(--fd);font-size:2.3rem;color:var(--mark);margin-top:2px}
.ses-meta{display:flex;flex-wrap:wrap;gap:4px 14px;font-size:.8rem;font-weight:600;color:var(--muted)}
.ses-meta .who{color:var(--green)}
.ses-meta .who::before{content:"● ";font-size:.6rem;vertical-align:2px}
.ses-head h4{font-family:var(--fd);font-size:clamp(1.3rem,1.1rem + .7vw,1.65rem);font-weight:700;letter-spacing:-.02em;line-height:1.15;text-wrap:balance}
.ses-tag{color:var(--ink-2);font-size:.98rem}
.ses-main{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);gap:0}
.ses-text{padding:26px 28px;display:flex;flex-direction:column;gap:18px;min-width:0}
.story{font-size:1rem;color:var(--ink-2);line-height:1.65}
.blk h5{font-size:.72rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--green-2);margin-bottom:10px}
.obj{counter-reset:o;display:grid;gap:8px}
.obj li{counter-increment:o;display:grid;grid-template-columns:24px 1fr;gap:10px;font-size:.93rem}
.obj li::before{content:counter(o);display:grid;place-items:center;width:22px;height:22px;border-radius:6px;background:var(--green-soft);color:var(--green);font-weight:700;font-size:.78rem;margin-top:1px}
.have{padding:16px 18px;border-radius:12px;background:var(--mark-soft);border:1px solid color-mix(in srgb,var(--mark) 55%,transparent)}
.have h5{color:var(--ink);margin-bottom:8px}
.have h5::before{content:"✓ ";color:var(--green)}
.have ul{display:grid;gap:5px}
.have li{position:relative;padding-left:16px;font-size:.9rem}
.have li::before{content:"";position:absolute;left:2px;top:.62em;width:6px;height:6px;border-radius:50%;background:var(--ink)}

/* Ví dụ trước/sau */
.ex{margin:0;padding:26px 28px;background:var(--paper);border-left:1px solid var(--line-2);display:flex;flex-direction:column;gap:12px;min-width:0}
.ex figcaption{font-family:var(--fd);font-weight:700;font-size:1.1rem;line-height:1.25}
.ex figcaption small{display:block;font-family:var(--fb);font-size:.7rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--green-2);margin-bottom:4px}
.ex-row{border-radius:12px;padding:12px 14px;min-width:0}
.ex-tag{display:inline-block;font-size:.68rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;padding:2px 8px;border-radius:5px;margin-bottom:8px}
.ex-before{background:var(--card);border:1px solid var(--line-2)}
.ex-before .ex-tag{background:var(--paper-2);color:var(--muted)}
.ex-before p{font-size:.92rem;color:var(--muted);text-decoration:line-through;text-decoration-color:color-mix(in srgb,var(--bad) 55%,transparent);text-decoration-thickness:1.5px}
.ex-after{background:var(--deep);color:var(--on-deep)}
.ex-after .ex-tag{background:var(--mark);color:var(--on-mark)}
.ex-after pre{margin:0;font:.82rem/1.6 var(--fm);white-space:pre-wrap;word-break:break-word;color:var(--on-deep)}
.ex-note{font-size:.86rem;color:var(--ink-2)}

/* Giáo án mở rộng */
.ses-more{border-top:1px solid var(--line-2)}
.ses-more summary{display:flex;align-items:center;gap:10px;padding:16px 28px;cursor:pointer;font-weight:700;font-size:.93rem;color:var(--green);list-style:none;user-select:none}
.ses-more summary::-webkit-details-marker{display:none}
.ses-more summary::before{content:"+";display:grid;place-items:center;width:24px;height:24px;border-radius:50%;background:var(--green-soft);font-size:1.05rem;line-height:1;transition:transform .2s}
.ses-more[open] summary::before{content:"−"}
.ses-more summary:hover{background:var(--card-2)}
.ses-body{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:28px;padding:6px 28px 28px}
.ses-body>div{display:flex;flex-direction:column;gap:20px;min-width:0}
.agenda{display:grid;gap:0;border-left:2px solid var(--line-2)}
.agenda li{display:grid;grid-template-columns:104px minmax(0,1fr);gap:14px;padding:10px 0 10px 16px;position:relative}
.agenda li::before{content:"";position:absolute;left:-7px;top:16px;width:12px;height:12px;border-radius:50%;border:2.5px solid var(--card);background:var(--k-th)}
.agenda li.k-de::before{background:var(--k-de)}
.agenda li.k-br::before{background:var(--k-br)}
.agenda li.k-pr::before{background:var(--k-pr)}
.agenda li.k-wr::before{background:var(--k-wr)}
.agenda li.k-br{opacity:.7}
.agenda time{font-size:.8rem;font-weight:700;font-variant-numeric:tabular-nums;color:var(--ink);display:flex;flex-direction:column;gap:4px}
.agenda time span{align-self:flex-start;font-size:.64rem;font-weight:700;letter-spacing:.04em;padding:1px 7px;border-radius:5px;color:#fff}
.agenda b{display:flex;justify-content:space-between;gap:10px;font-size:.93rem;line-height:1.35}
.agenda b em{font-style:normal;font-weight:600;font-size:.78rem;color:var(--muted);white-space:nowrap}
.agenda ul{margin-top:5px;display:grid;gap:3px}
.agenda ul li{display:block;padding:0 0 0 14px;font-size:.86rem;color:var(--ink-2)}
.agenda ul li::before{left:2px;top:.62em;width:5px;height:5px;border:0;background:var(--muted)}
.task{padding:20px;border-radius:14px;background:var(--deep);color:var(--on-deep)}
.task h5{color:var(--mark)}
.task-t{font-family:var(--fd);font-weight:700;font-size:1.25rem;line-height:1.2}
.task-in{margin-top:8px;font-size:.88rem;color:var(--on-deep-2)}
.task-in b{color:var(--on-deep)}
.task-pass{margin-top:14px;font-size:.7rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--mark)}
.pass{display:grid;gap:7px;margin-top:8px}
.pass li{position:relative;padding-left:26px;font-size:.88rem}
.pass li::before{content:"";position:absolute;left:0;top:.2em;width:16px;height:16px;border-radius:4px;border:1.5px solid var(--on-deep-2)}
.pass li::after{content:"";position:absolute;left:5px;top:.42em;width:6px;height:9px;border-right:2px solid var(--mark);border-bottom:2px solid var(--mark);transform:rotate(45deg)}
.concepts{display:grid;gap:8px}
.concepts>div{padding:10px 12px;border-radius:10px;background:var(--paper)}
.concepts dt{font-weight:700;font-size:.9rem}
.concepts dd{font-size:.85rem;color:var(--ink-2)}
.mats{display:grid;gap:4px}
.mats li{position:relative;padding-left:18px;font-size:.88rem;color:var(--ink-2)}
.mats li::before{content:"";position:absolute;left:0;top:.35em;width:10px;height:12px;border:1.5px solid var(--green-2);border-radius:2px}
.tools{display:flex;flex-wrap:wrap;gap:6px}
.tools span{font-size:.8rem;font-weight:600;padding:4px 10px;border-radius:999px;border:1.5px solid var(--line)}
.prep{font-size:.9rem;padding:12px 14px;border-radius:10px;background:var(--green-soft);color:var(--ink)}
.src-list{padding:12px 28px;border-top:1px solid var(--line-2);font-size:.76rem;color:var(--muted)}
.src-list b{margin-right:8px;color:var(--ink-2)}

/* Bạn cầm về */
.haul{margin-top:64px;padding:36px;border-radius:22px;background:var(--deep);color:var(--on-deep)}
.haul-head{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:12px 40px;align-items:end;margin-bottom:26px}
.haul-head h3{font-size:clamp(1.4rem,1.1rem + 1vw,1.9rem)}
.haul-head p{color:var(--on-deep-2);font-size:.92rem}
.haul-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.haul-grid>div{padding:18px;border-radius:14px;background:rgba(255,255,255,.05);border:1px solid var(--deep-line)}
.haul-day{font-family:var(--fd);font-weight:700;font-size:1.05rem;color:var(--mark);margin-bottom:10px}
.haul-grid ul{display:grid;gap:8px}
.haul-grid li{display:grid;grid-template-columns:30px 1fr;gap:8px;font-size:.84rem;color:var(--on-deep-2);line-height:1.4}
.haul-grid li span{align-self:start;font-size:.66rem;font-weight:800;text-align:center;padding:2px 0;border-radius:4px;background:var(--deep-line);color:var(--on-deep)}

/* ---------- Triển khai ---------- */
.road{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:10px;position:relative}
.road::before{content:"";position:absolute;left:0;right:0;top:15px;height:2px;background:var(--line)}
.road>li{position:relative;padding-top:42px}
.road>li::before{content:"";position:absolute;top:8px;left:0;width:16px;height:16px;border-radius:50%;background:var(--paper);border:3px solid var(--green)}
.road>li.cur::before{background:var(--mark);border-color:var(--deep);width:18px;height:18px;top:7px}
.road .wk{font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.road h3{font-size:1.15rem;margin:2px 0 10px}
.road>li.cur h3{background:linear-gradient(transparent 60%,var(--mark) 60%);display:table}
.road ul{display:grid;gap:6px}
.road ul li{font-size:.85rem;color:var(--ink-2);padding-left:12px;position:relative;line-height:1.45}
.road ul li::before{content:"";position:absolute;left:0;top:.6em;width:5px;height:5px;border-radius:50%;background:var(--green-2)}
.deliv{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:40px;margin-top:64px;padding:36px;border-radius:22px;background:var(--card);border:1px solid var(--line-2);box-shadow:var(--shadow)}
.deliv h3{font-size:1.5rem;margin-bottom:10px}
.deliv .lead{font-size:.98rem;margin-bottom:22px}
.dl{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.dl li{display:flex;flex-direction:column;gap:2px;padding:14px 16px;border-radius:12px;background:var(--paper);font-size:.86rem;color:var(--muted)}
.dl b{font-size:.95rem;color:var(--ink)}
.scope{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,.7fr);gap:16px;margin-top:16px}
.scope>div{padding:24px 26px;border-radius:var(--r);border:1px solid var(--line)}
.scope h4{font-size:.76rem;letter-spacing:.1em;text-transform:uppercase;color:var(--green-2);margin-bottom:12px}
.scope ul{display:grid;gap:8px}
.scope li{position:relative;padding-left:18px;font-size:.9rem;color:var(--ink-2)}
.scope li::before{content:"";position:absolute;left:0;top:.6em;width:7px;height:7px;border-radius:2px;background:var(--green)}
.scope>div+div li::before{background:transparent;border:1.5px solid var(--muted)}

/* ---------- Đánh giá ---------- */
.kpi{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);gap:28px;align-items:start}
.tbl{overflow-x:auto;border-radius:var(--r);border:1px solid var(--line-2)}
.tbl table{width:100%;border-collapse:collapse;font-size:.92rem;min-width:520px}
.tbl th{text-align:left;font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);padding:14px 18px;background:var(--paper);border-bottom:1px solid var(--line-2)}
.tbl td{padding:16px 18px;border-bottom:1px solid var(--line-2);vertical-align:top;color:var(--ink-2)}
.tbl tr:last-child td{border-bottom:0}
.tbl td b{display:block;color:var(--ink);font-size:.98rem}
.tbl td:first-child{color:var(--muted);font-size:.86rem}
.tbl .tgt{font-family:var(--fd);font-weight:700;font-size:1.15rem;color:var(--green);white-space:nowrap}
.chart{padding:24px;border-radius:var(--r);background:var(--paper);border:1px solid var(--line-2)}
.chart figcaption{display:flex;flex-direction:column;gap:2px;margin-bottom:18px}
.chart figcaption span{font-size:.78rem;color:var(--muted)}
.bars{display:grid;gap:14px}
.chart .br{display:grid;grid-template-columns:84px 1fr;gap:10px;align-items:center;font-size:.84rem;font-weight:600}
.track{display:grid;gap:4px}
.track i{display:flex;justify-content:flex-end;align-items:center;height:14px;width:var(--w);border-radius:4px;padding-right:5px}
.track em{font-style:normal;font-size:.62rem;font-weight:800}
.track .pre{background:var(--line);color:var(--ink-2)}
.track .post{background:var(--green);color:var(--card)}
.axis{display:flex;justify-content:space-between;margin:8px 0 0 94px;font-size:.7rem;color:var(--muted)}
.key{display:flex;gap:16px;margin-top:12px;font-size:.78rem;color:var(--muted)}
.key i{display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:6px;vertical-align:-1px}
.k-pre{background:var(--line)}.k-post{background:var(--green)}

/* ---------- Giảng viên & bảo mật ---------- */
.trust{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:28px}
.trainer,.safe{padding:36px;border-radius:22px;background:var(--card);border:1px solid var(--line-2)}
.trainer .who{display:flex;align-items:center;gap:18px;margin-bottom:20px}
.av{display:grid;place-items:center;width:72px;height:72px;border-radius:20px;background:var(--deep);color:var(--mark);font-family:var(--fd);font-weight:800;font-size:1.4rem;flex:none}
.trainer h2{font-size:1.7rem}
.trainer .role{color:var(--muted);font-size:.92rem;margin-top:2px}
.trainer ul{display:grid;gap:10px}
.trainer li{position:relative;padding-left:22px;font-size:.93rem;color:var(--ink-2)}
.trainer li::before{content:"";position:absolute;left:0;top:.6em;width:10px;height:2px;background:var(--green)}
.trainer .src{margin-top:22px;padding-top:16px;border-top:1px solid var(--line-2);font-size:.8rem;color:var(--muted)}
.safe h2{font-size:1.7rem;margin-bottom:20px}
.safe dl{display:grid;gap:0}
.safe dl>div{padding:14px 0;border-top:1px solid var(--line-2)}
.safe dt{font-weight:700;font-size:.98rem}
.safe dd{font-size:.9rem;color:var(--ink-2);margin-top:3px}

/* ---------- Hỏi đáp ---------- */
.faq-wrap{display:grid;grid-template-columns:minmax(0,.7fr) minmax(0,1.3fr);gap:48px;align-items:start}
.faq-wrap .sec-head{position:sticky;top:96px;margin:0}
.faq{border-top:2px solid var(--ink)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{display:flex;justify-content:space-between;gap:20px;padding:20px 0;cursor:pointer;font-weight:700;font-size:1.02rem;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";flex:none;display:grid;place-items:center;width:28px;height:28px;border-radius:50%;border:1.5px solid var(--line);font-weight:500;color:var(--green)}
.faq details[open] summary::after{content:"−";background:var(--mark);border-color:var(--mark);color:var(--on-mark)}
.faq details p{padding:0 48px 22px 0;color:var(--ink-2);font-size:.95rem}

/* ---------- Đăng ký ---------- */
.final{background:var(--deep);color:var(--on-deep);padding-block:96px}
.final-grid{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:56px;align-items:start}
.final .kicker{color:var(--mark)}
.final .lead{color:var(--on-deep-2);margin-top:14px}
.next{counter-reset:n;display:grid;gap:12px;margin:28px 0}
.next li{counter-increment:n;display:grid;grid-template-columns:36px 1fr;gap:2px 14px}
.next li::before{content:counter(n);grid-row:span 2;display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--mark);color:var(--on-mark);font-family:var(--fd);font-weight:800}
.next b{font-size:1rem}
.next span{font-size:.86rem;color:var(--on-deep-2)}
.contact{margin-top:24px;padding-top:20px;border-top:1px solid var(--deep-line);font-size:.86rem;color:var(--on-deep-2)}
.contact .line{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:6px}
.addr{font-family:var(--fd);font-weight:700;font-size:1.15rem;color:var(--on-deep);user-select:all;word-break:break-all}
.mini{min-height:30px;padding:0 12px;border-radius:999px;border:1.5px solid var(--deep-line);background:transparent;color:var(--on-deep);font-size:.78rem;font-weight:700;cursor:pointer}
.mini:hover{border-color:var(--mark)}
.req{background:var(--card);color:var(--ink);border-radius:22px;padding:32px;display:grid;gap:16px;box-shadow:0 30px 60px -30px rgba(0,0,0,.5)}
.frow{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.fld{display:flex;flex-direction:column;gap:6px;min-width:0;border:0;padding:0;margin:0}
.fld label,.fld legend{font-size:.84rem;font-weight:700;color:var(--ink-2);padding:0}
.fld legend{margin-bottom:8px}
.fld label i{color:var(--bad);font-style:normal}
.fld input,.fld select,.fld textarea{width:100%;min-height:46px;padding:10px 14px;border-radius:10px;border:1.5px solid var(--line);background:var(--paper);transition:border-color .15s,background .15s}
.fld textarea{min-height:96px;resize:vertical}
.fld input:focus,.fld select:focus,.fld textarea:focus{outline:none;border-color:var(--green);background:var(--card)}
.fld .bad,.fld input.bad,.fld select.bad{border-color:var(--bad)}
.err{font-size:.78rem;color:var(--bad);min-height:0}
.err:empty{display:none}
.opts{display:flex;flex-wrap:wrap;gap:8px}
.opt{position:relative;cursor:pointer}
.opt input{position:absolute;opacity:0;width:1px;height:1px}
.opt span{display:inline-flex;align-items:center;min-height:36px;padding:0 14px;border-radius:999px;border:1.5px solid var(--line);font-size:.85rem;font-weight:600;transition:background .15s,border-color .15s}
.opt input:checked+span{background:var(--green-soft);border-color:var(--green);color:var(--green)}
.opt input:checked+span::before{content:"✓";margin-right:6px}
.opt input:focus-visible+span{outline:2px solid var(--green-2);outline-offset:2px}
.hp{position:absolute!important;left:-9999px;width:1px;height:1px;overflow:hidden}
.consent{display:flex;gap:10px;align-items:flex-start;font-size:.84rem;color:var(--ink-2);cursor:pointer}
.consent input{margin-top:3px;accent-color:var(--green);width:16px;height:16px;flex:none}
.consent a{color:var(--green);font-weight:600}
.form-foot{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px;margin-top:4px}
.status{font-size:.86rem;color:var(--muted)}
.status.bad{color:var(--bad)}
.done{text-align:left}
.done .ok{display:flex;align-items:center;gap:12px;font-family:var(--fd);font-size:1.4rem}
.done .ok i{display:grid;place-items:center;width:40px;height:40px;border-radius:50%;background:var(--green);color:var(--card);font-style:normal}
.done p{color:var(--ink-2)}
.done .btn{justify-self:start}

/* ---------- Chân trang & nút nổi ---------- */
/* Đầu trang con */
.page-head{background:var(--deep);color:var(--on-deep);position:relative;overflow:hidden}
.page-head::before{content:"";position:absolute;inset:0;background-image:linear-gradient(var(--deep-line) 1px,transparent 1px),linear-gradient(90deg,var(--deep-line) 1px,transparent 1px);background-size:44px 44px;mask-image:radial-gradient(ellipse 60% 90% at 85% 0%,#000 10%,transparent 70%);-webkit-mask-image:radial-gradient(ellipse 60% 90% at 85% 0%,#000 10%,transparent 70%);opacity:.5;pointer-events:none}
.page-head .wrap{position:relative;padding-block:56px 48px}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:.82rem;font-weight:600;color:var(--on-deep-2);margin-bottom:18px}
.crumb a{color:var(--on-deep-2);text-decoration:none}
.crumb a:hover{color:var(--mark)}
.crumb span{opacity:.5}
.page-head h1{font-size:clamp(2.1rem,1.4rem + 2.6vw,3.4rem);font-weight:800;letter-spacing:-.03em;max-width:20ch}
.page-head .lead{color:var(--on-deep-2);margin-top:16px;font-size:1.08rem}
.subnav{display:flex;flex-wrap:wrap;gap:8px;margin-top:28px;padding-top:22px;border-top:1px solid var(--deep-line)}
.subnav a{padding:7px 14px;border-radius:999px;border:1.5px solid var(--deep-line);font-size:.85rem;font-weight:600;color:var(--on-deep);text-decoration:none;transition:border-color .15s,background .15s}
.subnav a:hover{border-color:var(--mark);background:rgba(255,255,255,.05)}
.block-head{margin-top:80px;display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:10px 40px;align-items:end}
.block-head h2{font-size:clamp(1.6rem,1.2rem + 1.4vw,2.2rem)}
.block-head p{color:var(--ink-2)}
.faq-page{max-width:880px}


/* Cuối trang: trang tiếp theo + mời tư vấn */
.page-end{padding-block:72px;background:var(--paper);border-top:1px solid var(--line-2)}
.page-end-grid{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:20px}
.cta-box{padding:32px;border-radius:20px;background:var(--deep);color:var(--on-deep)}
.cta-box .kicker{color:var(--mark);margin-bottom:10px}
.cta-box h2{font-size:clamp(1.5rem,1.2rem + 1vw,2rem)}
.cta-box p:not(.kicker){color:var(--on-deep-2);margin:10px 0 20px;max-width:56ch}
.page-end-grid>.cta-box:only-child,.page-end-grid>.pager:only-child{grid-column:1/-1}
/* Phân trang: thẻ trang trước / trang sau */
.pager{display:flex;align-items:center;gap:20px;padding:28px;border-radius:20px;background:var(--card);border:1px solid var(--line);color:var(--ink);text-decoration:none;transition:border-color .2s,box-shadow .2s}
.pager-next{flex-direction:row-reverse;justify-content:space-between}
.pager:hover{border-color:var(--green);box-shadow:var(--shadow)}
.pager:focus-visible{outline:3px solid var(--mark);outline-offset:3px}
.pager-t{display:flex;flex-direction:column;gap:6px;min-width:0}
.pager-next .pager-t{text-align:left}
.pager small{font-size:.72rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.pager b{font-family:var(--fd);font-size:1.6rem;line-height:1.15;letter-spacing:-.02em}
.pager-t>span{font-size:.92rem;color:var(--ink-2)}
.pager-ic{flex:none;display:grid;place-items:center;width:48px;height:48px;border-radius:50%;background:var(--deep);color:var(--mark);transition:transform .2s}
.pager-ic .ic{width:22px;height:22px}
.pager-next:hover .pager-ic{transform:translateX(4px)}
.pager-prev:hover .pager-ic{transform:translateX(-4px)}
.final h2{font-size:clamp(2rem,1.4rem + 2.2vw,3rem);font-weight:800;letter-spacing:-.03em}
.final .crumb{margin-bottom:22px}

/* Chân trang */
.foot{padding-block:56px 24px;font-size:.88rem;color:var(--muted);background:var(--card);border-top:1px solid var(--line-2)}
.foot-grid{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,1fr));gap:32px}
.foot-brand p{margin-top:14px;max-width:38ch}
.foot-h{font-size:.72rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--ink);margin-bottom:12px}
.foot ul{display:grid;gap:8px}
.foot a{color:var(--ink-2);text-decoration:none}
.foot a:hover{color:var(--green);text-decoration:underline}
.foot-mail{font-weight:600;color:var(--ink);user-select:all;word-break:break-all}
.foot-base{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;margin-top:40px;padding-top:20px;border-top:1px solid var(--line-2);font-size:.78rem}
.fab{position:fixed;right:max(20px,env(safe-area-inset-right,0px));bottom:calc(20px + env(safe-area-inset-bottom,0px));z-index:60;box-shadow:0 14px 30px -12px rgba(0,0,0,.45);opacity:0;transform:translateY(20px);pointer-events:none;transition:opacity .25s,transform .25s}
.fab.show{opacity:1;transform:none;pointer-events:auto}

/* ---------- Màn hình vừa ---------- */
@media (max-width:1100px){
  .nav a{padding:7px 9px;font-size:.85rem}
  .principles{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:8px}
  .principles li:nth-child(2){border-right:0}
  .principles li:nth-child(3){padding-left:0}
  .qa{grid-template-columns:repeat(3,minmax(0,1fr))}
  .qa>div:nth-child(3){border-right:0;padding-right:0}
  .qa>div:nth-child(4){padding-left:0}
  .qa>div:nth-child(n+4){border-top:1px solid var(--line-2)}
  .road{grid-template-columns:repeat(3,minmax(0,1fr));row-gap:28px}
  .haul-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .frame{grid-template-columns:minmax(0,1fr) minmax(0,1.4fr)}
  .frame-bring{grid-column:1/-1;border-left:0!important;border-top:1px solid var(--line-2)}
}
@media (max-width:960px){
  .menu-btn{display:grid}
  .top-cta{margin-left:auto}
  .nav{display:none;position:absolute;left:0;right:0;top:100%;flex-direction:column;gap:2px;margin:0;padding:10px max(16px,env(safe-area-inset-left,0px)) 16px;background:var(--paper);border-bottom:1px solid var(--line);box-shadow:0 18px 30px -20px rgba(0,0,0,.35)}
  .top.open .nav{display:flex}
  .nav a{padding:12px 14px;font-size:1rem;border-radius:10px}
  .page-end-grid,.block-head{grid-template-columns:minmax(0,1fr)}
  .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot-brand{grid-column:1/-1}
  .hero-grid{grid-template-columns:minmax(0,1fr);gap:44px;padding-block:56px 64px}
  .sec{padding-block:72px}
  .sec-head.split,.models-head,.fourd-head,.thread-head,.haul-head{grid-template-columns:minmax(0,1fr);align-items:start}
  .pains li{grid-template-columns:36px minmax(0,1fr) auto;gap:6px 14px}
  .pains li::before{grid-row:span 3}
  .pains h3{grid-column:2}
  .pains .now,.pains .after{grid-column:2/-1}
  .pains .tag{grid-column:3;grid-row:1}
  .calc,.eco,.kpi,.trust,.deliv,.final-grid,.faq-wrap,.ses-main,.ses-body{grid-template-columns:minmax(0,1fr)}
  .ex{border-left:0;border-top:1px solid var(--line-2)}
  .goals,.fourd dl{grid-template-columns:repeat(2,minmax(0,1fr))}
  .faq-wrap .sec-head{position:static}
  .daynav{grid-template-columns:repeat(2,minmax(0,1fr))}
  .daynav .expand{min-height:40px}
}

/* ---------- Điện thoại ---------- */
@media (max-width:640px){
  body{font-size:15.5px}
  .wrap{padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
  .top .wrap{gap:12px;min-height:58px}
  .brand{font-size:.95rem}
  .top .btn .l{display:none}
  .top .btn .s{display:inline}
  .hero-grid{padding-block:44px 52px}
  .facts{grid-template-columns:repeat(2,minmax(0,1fr))}
  .facts>div{padding:14px 10px 12px 0!important;border-right:0;border-bottom:1px solid var(--deep-line)}
  .tt{padding:18px 14px 14px}
  .tt-cell{padding:8px;font-size:.8rem}
  .tt-hint{display:none}
  .tt-mod{grid-template-columns:minmax(0,1fr);gap:4px}
  .tt-mlabel{flex-direction:row;justify-content:flex-start;align-items:baseline;gap:8px;margin-top:4px}
  .qa{grid-template-columns:minmax(0,1fr)}
  .qa>div{padding:18px 0!important;border-right:0;border-top:1px solid var(--line-2)}
  .qa>div:first-child{border-top:0}
  .sec,.final{padding-block:60px}
  .sec-head{margin-bottom:32px}
  .pains li{grid-template-columns:minmax(0,1fr) auto}
  .pains li::before{display:none}
  .pains h3{grid-column:1}
  .pains .now,.pains .after{grid-column:1/-1}
  .pains .tag{grid-column:2}
  .calc-in,.calc-out{padding:24px 20px}
  .goals,.fit,.principles,.tiers,.haul-grid,.road,.dl,.scope,.frow{grid-template-columns:minmax(0,1fr)}
  .principles li{padding:20px 0!important;border-right:0;border-bottom:1px solid var(--deep-line)}
  .principles li::before{font-size:2.2rem}
  .eco,.models,.fourd,.thread,.haul,.deliv,.trainer,.safe,.req{padding:22px 18px}
  .eco{gap:28px}
  .node{width:104px;margin:-28px 0 0 -52px;font-size:.78rem;padding:7px 5px;transform:rotate(var(--a)) translate(min(118px,31vw)) rotate(calc(-1 * var(--a)))}
  .node small{font-size:.6rem}
  .core{font-size:.95rem}
  .tier>p:not(.tier-k){min-height:0}
  .frame{grid-template-columns:minmax(0,1fr)}
  .frame>div{padding:22px 18px}
  .frame>div+div{border-left:0;border-top:1px solid var(--line-2)}
  .fmt li{grid-template-columns:12px 84px 36px minmax(0,1fr);gap:8px;font-size:.84rem}
  .timebar span{font-size:.68rem}
  .daynav{position:static;gap:6px;margin-top:20px;border-bottom:0;grid-template-columns:repeat(2,minmax(0,1fr))}
  .page-head .wrap{padding-block:40px 32px}
  .cta-box{padding:24px 20px}
  .pager{padding:22px 20px;gap:16px}
  .pager b{font-size:1.35rem}
  .pager-ic{width:42px;height:42px}
  .page-end{padding-block:48px}
  .block-head{margin-top:56px}
  .thread{margin-top:56px}
  .daynav .expand{grid-column:1/-1}
  .daynav [role=tab]{padding:9px 10px}
  .daynav [role=tab] b{font-size:.86rem}
  .daynav [role=tab] small{font-size:.62rem}
  .day-head{grid-template-columns:auto minmax(0,1fr);gap:12px 16px}
  .day-no b{font-size:3.2rem}
  .day-head h3{font-size:1.35rem}
  .day-head>div{grid-column:2}
  .day-time{grid-column:1/-1;text-align:left}
  .ses-head{grid-template-columns:52px minmax(0,1fr);gap:4px 14px;padding:20px 18px 18px}
  .ses-num{width:52px;height:52px;border-radius:12px;grid-row:span 1}
  .ses-num b{font-size:1.6rem}
  .ses-num small{font-size:.54rem}
  .ses-head h4,.ses-tag{grid-column:1/-1}
  .ses-text,.ex{padding:20px 18px}
  .ses-more summary{padding:14px 18px}
  .ses-body{padding:4px 18px 22px}
  .agenda li{grid-template-columns:minmax(0,1fr);gap:6px}
  .agenda time{flex-direction:row;align-items:center;gap:8px}
  .src-list{padding:12px 18px}
  .road::before{left:7px;right:auto;top:0;bottom:0;width:2px;height:auto}
  .road>li{padding:0 0 0 34px}
  .road>li::before{top:2px}
  .road>li.cur::before{top:1px;left:-1px}
  .faq details p{padding-right:0}
  .form-foot .btn{width:100%}
  .fab{left:max(16px,env(safe-area-inset-left,0px));right:max(16px,env(safe-area-inset-right,0px))}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
}