/* GrammUp Design System v2 — trang công khai (trang chủ, ngữ pháp, Writing, bài viết)
   Phong cách: "Friendly Academic" — nền sáng, nhiều khoảng thở, một màu chủ đạo (xanh), cam chỉ để nhấn, viền mảnh thay cho bóng đậm.
   Một phông duy nhất: Be Vietnam Pro (dấu tiếng Việt chuẩn, hiện đại, đọc tốt ở cỡ nhỏ). */
:root{
  /* màu */
  --blue-50:#EEF2FE;--blue-100:#DCE4FD;--blue-200:#B9C9FB;--blue-500:#2855E8;--blue-600:#1F46CC;--blue-700:#1A3AA8;--blue-900:#0F1F5C;
  --orange-50:#FFF3EE;--orange-100:#FFE2D6;--orange-500:#FF6B35;--orange-700:#C2410C;
  --ink:#1E293B;--ink-2:#475569;--ink-3:#64748B;--ink-4:#94A3B8;
  --line:#E2E8F0;--line-2:#EEF2F7;--bg:#F5F7FB;--surface:#FFFFFF;--surface-2:#F8FAFD;
  --ok:#15803D;--ok-bg:#ECFDF3;--no:#B91C1C;--no-bg:#FEF2F2;--warn:#B45309;--warn-bg:#FFFBEB;
  --brand:var(--blue-500);--accent:var(--orange-500);
  /* chữ */
  --font:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --fs-display:clamp(36px,5.2vw,58px);--fs-h1:clamp(28px,3.6vw,40px);--fs-h2:clamp(24px,2.8vw,32px);--fs-h3:clamp(18px,1.6vw,20px);
  --fs-lead:clamp(17px,1.5vw,19px);--fs-body:16px;--fs-sm:14px;--fs-xs:13px;
  /* khoảng cách, bo góc, bóng */
  --s1:4px;--s2:8px;--s3:12px;--s4:16px;--s5:20px;--s6:24px;--s8:32px;--s10:40px;--s12:48px;--s16:64px;--s20:80px;
  --r-sm:8px;--r-md:12px;--r-lg:16px;--r-xl:24px;--r-pill:999px;
  --sh-1:0 1px 2px rgba(15,23,42,.06);--sh-2:0 6px 16px -6px rgba(15,23,42,.12);--sh-3:0 24px 48px -16px rgba(15,31,92,.22);
  --wrap:1160px;
}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--surface);color:var(--ink);font:400 var(--fs-body)/1.65 var(--font);-webkit-font-smoothing:antialiased}
a{color:var(--blue-600);text-underline-offset:3px}a:hover{color:var(--blue-700)}
img{max-width:100%;height:auto}
:focus-visible{outline:3px solid var(--blue-200);outline-offset:2px;border-radius:6px}
h1,h2,h3,h4{text-wrap:balance;font-family:var(--font);color:var(--ink);letter-spacing:-.015em;line-height:1.2;font-weight:700}
h1{font-size:var(--fs-h1);margin:.2em 0 .45em}h2{font-size:var(--fs-h2);margin:0 0 .5em}h3{font-size:var(--fs-h3);margin:0 0 .4em;font-weight:600}
p{margin:0 0 1em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}.narrow{max-width:780px}
.muted{color:var(--ink-3)}.lead{font-size:var(--fs-lead);color:var(--ink-2);line-height:1.6}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:#fff;padding:8px 12px;z-index:99;border-radius:8px}
.ico{width:24px;height:24px;flex:0 0 auto;stroke:currentColor;fill:none;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round}
.vh{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- nút ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 20px;border-radius:var(--r-md);border:1px solid transparent;
  font:600 15px/1 var(--font);text-decoration:none;cursor:pointer;transition:background .15s,border-color .15s,color .15s,box-shadow .15s;white-space:nowrap}
.btn-primary{background:var(--brand);color:#fff!important;box-shadow:0 1px 2px rgba(40,85,232,.3)}.btn-primary:hover{background:var(--blue-600)}
.btn-secondary{background:#fff;color:var(--ink)!important;border-color:var(--line)}.btn-secondary:hover{border-color:var(--blue-200);color:var(--blue-600)!important}
.btn-ghost{background:transparent;color:var(--ink-2)!important}.btn-ghost:hover{background:var(--blue-50);color:var(--blue-600)!important}
.btn-light{background:#fff;color:var(--blue-700)!important}.btn-light:hover{background:var(--blue-50)}
.btn-lg{min-height:52px;padding:0 26px;font-size:16px;border-radius:14px}.btn-sm{min-height:36px;padding:0 14px;font-size:14px;border-radius:10px}
.btn .ico{width:18px;height:18px}

/* ---------- nhãn, thẻ ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;font:600 13px/1 var(--font);padding:6px 10px;border-radius:var(--r-pill);background:var(--blue-50);color:var(--blue-700)}
.badge-accent{background:var(--orange-50);color:var(--orange-700)}.badge-ok{background:var(--ok-bg);color:var(--ok)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font:600 14px/1.2 var(--font);color:var(--blue-600)}
.eyebrow::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--accent)}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:var(--s6)}
.card-soft{background:var(--surface-2);border:1px solid var(--line-2);border-radius:var(--r-lg);padding:var(--s6)}
.lv{color:#fff}

/* ---------- đầu trang ---------- */
.hd{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:saturate(1.6) blur(10px);border-bottom:1px solid var(--line-2)}
.hd-in{display:flex;align-items:center;gap:20px;min-height:68px}
.logo{display:inline-flex;align-items:center;gap:9px;text-decoration:none;color:var(--ink)}
.mk{width:32px;height:32px;border-radius:9px;background:linear-gradient(180deg,#3463F0,#2349CF);display:grid;place-items:center;flex:0 0 auto}
.mk svg{width:24px;height:24px}
.wm{font:700 21px/1 var(--font);letter-spacing:-.025em;white-space:nowrap}.wm b{color:var(--accent);font-weight:inherit}
.wm .u{display:inline-block;height:1.28em;width:.84em;vertical-align:-.2em;margin:0 .01em 0 .03em;overflow:visible}
.nav{display:flex;align-items:center;gap:2px;margin:0 auto}
.nav a,.nav summary{display:inline-flex;align-items:center;gap:4px;padding:9px 12px;border-radius:10px;text-decoration:none;color:var(--ink-2);font:500 15px/1 var(--font);cursor:pointer;list-style:none}
.nav summary::-webkit-details-marker{display:none}
.nav a:hover,.nav summary:hover,.nav a[aria-current]{color:var(--blue-600);background:var(--blue-50)}
.nav details{position:relative}.nav details[open] summary{color:var(--blue-600);background:var(--blue-50)}
.menu{position:absolute;top:calc(100% + 8px);left:0;min-width:240px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-3);padding:8px;display:grid;gap:2px}
.menu a{display:flex;flex-direction:column;align-items:flex-start;gap:3px;padding:10px 12px;font-weight:600;color:var(--ink)}
.menu a small{font-weight:400;color:var(--ink-3);font-size:13px;line-height:1.35}
.hd-act{display:flex;align-items:center;gap:8px}
.lang{display:inline-flex;border:1px solid var(--line);border-radius:10px;padding:3px;background:#fff}
.lang a{font:600 13px/1 var(--font);padding:6px 8px;border-radius:7px;text-decoration:none;color:var(--ink-3)}
.lang a[aria-current]{background:var(--blue-50);color:var(--blue-700)}
.burger{display:none}
.burger summary{list-style:none;width:44px;height:44px;display:grid;place-items:center;border-radius:12px;border:1px solid var(--line);cursor:pointer}
.burger summary::-webkit-details-marker{display:none}
.mnav{position:absolute;left:0;right:0;top:68px;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--sh-3);padding:12px 20px 20px;display:grid;gap:4px}
.mnav a{padding:12px 4px;text-decoration:none;color:var(--ink);font-weight:600;border-bottom:1px solid var(--line-2)}
.mnav .row{display:flex;gap:10px;margin-top:12px}.mnav .row .btn{flex:1}
@media(max-width:940px){.nav,.hd-act .btn-ghost,.hd-act .btn-primary{display:none}.burger{display:block}.hd-in{justify-content:space-between}}

/* ---------- section chung ---------- */
.sec{padding:var(--s20) 0}.sec-tight{padding:var(--s16) 0}.sec-alt{background:var(--bg)}
.sec-head{max-width:720px;margin:0 auto var(--s10);text-align:center}.sec-head p{color:var(--ink-3);font-size:var(--fs-lead);margin:0}
.sec-head .eyebrow{margin-bottom:14px}
@media(max-width:640px){.sec{padding:56px 0}.sec-head{margin-bottom:28px}}
.grid{display:grid;gap:var(--s5)}.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:960px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}@media(max-width:600px){.g2,.g3,.g4{grid-template-columns:1fr}}

/* ---------- trang chủ: hero ---------- */
.hero{position:relative;overflow:hidden;padding:72px 0 88px;background:radial-gradient(1200px 520px at 85% -10%,var(--blue-50),transparent 60%),linear-gradient(180deg,#fff,#fff)}
.hero-in{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero .kicker{font:600 15px/1.2 var(--font);letter-spacing:0;color:var(--blue-600);display:inline-flex;align-items:center;gap:10px;margin-bottom:22px}
.hero .kicker i{width:22px;height:2px;background:var(--accent);border-radius:2px;display:inline-block}
.hero h1{font-size:var(--fs-display);line-height:1.1;letter-spacing:-.03em;margin:0 0 20px;max-width:17ch}
.hero h1 em{font-style:normal;color:var(--brand);position:relative;white-space:nowrap}
.hero h1 em::after{content:"";position:absolute;left:2%;right:2%;bottom:-.04em;height:.14em;border-radius:6px;background:var(--orange-100);z-index:-1}
.hero .lead{max-width:50ch;margin-bottom:28px}
.hero .cta{display:flex;flex-wrap:wrap;gap:12px}
.hero .range{display:flex;align-items:center;gap:12px;margin-top:28px;color:var(--ink-3);font-size:14px}
.hero .range .lvls{display:flex;gap:4px}.hero .range .lvls span{width:22px;height:6px;border-radius:3px;background:var(--blue-200)}
.hero .range .lvls span:nth-child(n+3){background:var(--blue-500)}.hero .range .lvls span:nth-child(n+6){background:var(--blue-900)}
@media(max-width:940px){.hero{padding:48px 0 64px}.hero-in{grid-template-columns:1fr;gap:40px}.hero h1{max-width:none}}
/* mockup sản phẩm */
.mock{position:relative;justify-self:center;width:100%;max-width:480px}
.mock-card{background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--sh-3);padding:22px}
.mock-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.mock-prog{height:6px;border-radius:3px;background:var(--line-2);overflow:hidden;margin-bottom:18px}.mock-prog i{display:block;height:100%;width:62%;background:var(--brand);border-radius:3px}
.mock-q{font:600 18px/1.45 var(--font);margin:0 0 14px}
.mock-q u{text-decoration:none;display:inline-block;min-width:74px;border-bottom:2px solid var(--blue-200);text-align:center;color:var(--blue-600)}
.mock-opt{display:flex;align-items:center;gap:12px;padding:11px 14px;border:1px solid var(--line);border-radius:12px;margin-bottom:8px;font-size:15px}
.mock-opt b{width:26px;height:26px;border-radius:8px;display:grid;place-items:center;background:var(--surface-2);font-size:13px;color:var(--ink-3)}
.mock-opt.ok{border-color:#86EFAC;background:var(--ok-bg)}.mock-opt.ok b{background:#DCFCE7;color:var(--ok)}
.mock-fb{display:flex;gap:10px;align-items:flex-start;background:var(--ok-bg);border-radius:12px;padding:12px 14px;margin-top:6px;font-size:14px;color:#14532D}
.mock-fb .ico{width:20px;height:20px;color:var(--ok);margin-top:1px}
.mock-float{position:absolute;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--sh-2);padding:12px 14px;display:flex;gap:10px;align-items:center;font-size:13px}
.mock-float b{display:block;font-size:14px;color:var(--ink)}.mock-float .dot{width:36px;height:36px;border-radius:10px;display:grid;place-items:center}
.mock-f1{left:-44px;bottom:-30px}.mock-f2{right:-22px;top:-22px}
@media(max-width:560px){.mock{padding:0 4px}.mock-f1{left:0;bottom:-34px}.mock-f2{right:0;top:-26px}}

/* ---------- hành trình CEFR ---------- */
.journey{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.stage{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:22px;display:flex;flex-direction:column}
.stage .st-k{font:600 13px/1 var(--font);color:var(--ink-3);margin-bottom:10px}
.stage h3{margin-bottom:6px}.stage p{color:var(--ink-3);font-size:15px;margin-bottom:16px}
.stage .lvls{display:grid;gap:8px;margin-top:auto}
.lvl{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:12px;background:var(--surface-2);border:1px solid var(--line-2);text-decoration:none;color:var(--ink)}
.lvl:hover{border-color:var(--blue-200);background:var(--blue-50)}
.lvl .code{white-space:nowrap;min-width:60px;height:28px;padding:0 8px;border-radius:8px;display:grid;place-items:center;font:700 13px/1 var(--font);color:#fff}
.lvl span{font-size:14px;font-weight:600}.lvl small{display:block;font-weight:400;color:var(--ink-3);font-size:13px}
.journey-bar{height:8px;border-radius:4px;background:linear-gradient(90deg,#9DB5F7,var(--blue-500) 45%,var(--blue-900));margin:0 0 22px}
@media(max-width:960px){.journey{grid-template-columns:repeat(2,1fr)}}@media(max-width:600px){.journey{grid-template-columns:1fr}}

/* ---------- quy trình học ---------- */
.steps{display:grid;grid-template-columns:repeat(6,1fr);gap:14px;counter-reset:st;position:relative}
.step{position:relative;text-align:center;padding:4px 6px}
.step .ic{width:56px;height:56px;margin:0 auto 14px;border-radius:16px;display:grid;place-items:center;background:#fff;border:1px solid var(--line);color:var(--blue-600);position:relative;z-index:1;box-shadow:var(--sh-1)}
.step .ic .ico{width:26px;height:26px}
.step::before{counter-increment:st;content:counter(st);position:absolute;top:-6px;left:calc(50% + 18px);z-index:2;width:22px;height:22px;border-radius:50%;background:var(--accent);color:#fff;font:700 12px/22px var(--font)}
.steps::before{content:"";position:absolute;left:8%;right:8%;top:32px;height:2px;background:repeating-linear-gradient(90deg,var(--blue-200) 0 8px,transparent 8px 14px)}
.step h3{font-size:16px;margin-bottom:4px}.step p{font-size:14px;color:var(--ink-3);margin:0}
.step .en{display:block;font:600 12px/1.2 var(--font);color:var(--ink-4);margin-bottom:6px;letter-spacing:.02em}
@media(max-width:960px){.steps{grid-template-columns:repeat(3,1fr);row-gap:32px}.steps::before{display:none}}
@media(max-width:560px){.steps{grid-template-columns:1fr 1fr}}

/* ---------- giá trị, đối tượng ---------- */
.val{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:26px;transition:border-color .15s,box-shadow .15s}
.val:hover{border-color:var(--blue-200);box-shadow:var(--sh-2)}
.val .ic{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;background:var(--blue-50);color:var(--blue-600);margin-bottom:18px}
.val .ic.acc{background:var(--orange-50);color:var(--orange-700)}
.val .en{font:600 13px/1.2 var(--font);color:var(--ink-4);margin-bottom:6px;display:block}
.val p{color:var(--ink-3);margin:0;font-size:15px}
.who{display:flex;gap:16px;align-items:flex-start;padding:22px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg)}
.who .ic{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:var(--surface-2);color:var(--ink-2);border:1px solid var(--line-2);flex:0 0 auto}
.who h3{font-size:17px;margin-bottom:4px}.who p{margin:0;color:var(--ink-3);font-size:15px}

/* ---------- lời kêu gọi ---------- */
.cta-band{position:relative;overflow:hidden;border-radius:28px;padding:56px;background:linear-gradient(135deg,var(--blue-600),var(--blue-900));color:#fff;display:grid;grid-template-columns:1.4fr auto;gap:32px;align-items:center}
.cta-band::after{content:"";position:absolute;right:-80px;top:-120px;width:360px;height:360px;border-radius:50%;background:radial-gradient(circle,rgba(255,107,53,.35),transparent 65%)}
.cta-band h2{color:#fff;margin-bottom:10px}.cta-band p{color:#D6E0FF;margin:0;font-size:var(--fs-lead)}
.cta-band .btn{position:relative;z-index:1}
@media(max-width:760px){.cta-band{grid-template-columns:1fr;padding:36px 24px;border-radius:22px}}

/* ---------- chân trang ---------- */
.ft{background:#0E1A3A;color:#B9C4DE;padding:56px 0 28px;margin-top:0}
.ft a{color:#B9C4DE;text-decoration:none;display:block;padding:5px 0;font-size:15px}.ft a:hover{color:#fff}
.ft-in{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
.ft b{color:#fff;display:block;margin-bottom:10px;font-weight:600;font-size:15px}
.ft .logo{display:inline-flex;padding:0;margin-bottom:12px}.ft .wm{color:#fff}.ft .wm b{display:inline;color:var(--accent);margin:0;font-size:inherit}
.ft p{color:#97A3C0;font-size:14.5px;max-width:34ch}
.ft-bot{border-top:1px solid #22305A;margin-top:36px;padding-top:18px;font-size:13.5px;color:#8C98B6;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
@media(max-width:760px){.ft-in{grid-template-columns:1fr 1fr}.ft-in>div:first-child{grid-column:1/-1}}

/* ---------- trang nội dung (ngữ pháp, Writing, bài viết) ---------- */
.crumbs{display:flex;flex-wrap:wrap;gap:6px;font-size:14px;margin:22px 0 0;color:var(--ink-3)}.crumbs a{text-decoration:none;color:var(--ink-3)}.crumbs a:hover{color:var(--blue-600)}.crumbs span[aria-hidden]{opacity:.5}
main{display:block}
.page{padding:8px 0 64px}
.page h1{margin-top:14px}
.list{display:grid;gap:10px;margin:14px 0}
.item{display:flex;gap:14px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 16px;text-decoration:none;color:var(--ink);transition:border-color .15s,box-shadow .15s}
.item:hover{border-color:var(--blue-200);box-shadow:var(--sh-1);color:var(--ink)}
.item .n{min-width:36px;height:36px;padding:0 6px;border-radius:10px;display:grid;place-items:center;background:var(--blue-50);color:var(--blue-700);font-weight:700;flex:0 0 auto;font-size:13px}
.item b{display:block;font-weight:600}.item small{color:var(--ink-3);font-size:14px}
.lesson h2{border-top:1px solid var(--line-2);padding-top:28px;margin-top:36px}
.goal{background:var(--blue-50);border-radius:14px;padding:16px 18px;border:1px solid var(--blue-100)}
.tw{overflow-x:auto;margin:14px 0}
table{border-collapse:separate;border-spacing:0;width:100%;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;font-size:15px}
th,td{border-bottom:1px solid var(--line-2);padding:11px 14px;text-align:left;vertical-align:top}tr:last-child td{border-bottom:0}
th{background:var(--surface-2);font-weight:600;color:var(--ink-2);font-size:14px}
.eg{display:grid;gap:8px}.eg div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 16px}.eg .vi{color:var(--ink-3);font-size:14.5px;display:block;margin-top:2px}
.pit{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin:10px 0}
.pit .bad{color:var(--no);text-decoration:line-through;text-decoration-thickness:1.5px}.pit .good{color:var(--ok);font-weight:600}
.tip{border-left:3px solid var(--accent);background:var(--orange-50);padding:14px 18px;border-radius:0 12px 12px 0}
.model{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 22px;font-size:17px}
.model .vi{color:var(--ink-3);font-size:15px;margin-top:12px;border-top:1px dashed var(--line);padding-top:12px}
.box-cta{background:linear-gradient(135deg,var(--blue-600),var(--blue-900));color:#fff;border-radius:20px;padding:26px 28px;margin:40px 0;display:flex;gap:16px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.box-cta h2{color:#fff;margin:0;border:0!important;padding:0!important;font-size:22px}.box-cta p{margin:6px 0 0;color:#D6E0FF}
.box-cta .btn{background:#fff;color:var(--blue-700)!important}
.pager{display:flex;justify-content:space-between;gap:12px;margin:28px 0;flex-wrap:wrap}.pager a{max-width:48%;text-decoration:none;font-weight:600}
.ladder{display:grid;grid-template-columns:repeat(7,1fr);gap:10px;align-items:end;margin:20px 0 8px}
.ladder a{display:flex;flex-direction:column;justify-content:flex-end;color:#fff;text-decoration:none;border-radius:12px;padding:10px;min-height:60px;font-weight:700}
.ladder a small{font-weight:500;font-size:12px;opacity:.9}
@media(max-width:640px){.ladder{grid-template-columns:repeat(4,1fr)}}
/* bài viết */
.post{background:#fff;border:1px solid var(--line);border-radius:20px;padding:clamp(22px,4vw,44px)}
.post p,.post li{font-size:17.5px;line-height:1.75}.post blockquote{border-left:3px solid var(--brand);margin:18px 0;padding:6px 18px;background:var(--blue-50);border-radius:0 12px 12px 0}
.post code{background:var(--surface-2);border:1px solid var(--line-2);padding:1px 6px;border-radius:6px;font-size:.92em}
.meta{color:var(--ink-3);font-size:14.5px;display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.toc{background:var(--surface-2);border:1px solid var(--line-2);border-radius:14px;padding:14px 20px;margin:20px 0}.toc ol{margin:6px 0 0;padding-left:20px}
.pcard{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;text-decoration:none;color:var(--ink);transition:border-color .15s,box-shadow .15s}
.pcard:hover{border-color:var(--blue-200);box-shadow:var(--sh-2);color:var(--ink)}.pcard img{aspect-ratio:1200/630;object-fit:cover;width:100%;display:block}
.pcard div{padding:18px}.pcard h3{margin:.4em 0 .3em;font-size:18px}.pcard p{margin:0;color:var(--ink-3);font-size:15px}
.tags a{margin:0 6px 8px 0;text-decoration:none}
details.faq{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 20px;margin:10px 0}details.faq summary{cursor:pointer;font-weight:600}
.ico.sm{width:16px;height:16px}

@media(max-width:600px){.hero .kicker{font-size:14px}.hero .cta .btn{width:100%}.hero .range{flex-wrap:wrap}.step::before{left:calc(50% + 14px)}}

/* ---- v2.1: điện thoại gọn hơn ---- */
@media(max-width:600px){
 .sec{padding:44px 0}.hero h1{font-size:34px}.sec-head{margin-bottom:22px}.sec-head h2{font-size:26px}.sec-head p{font-size:15.5px}
 .mock-float{display:none}
 /* lộ trình dọc */
 .journey-bar{display:none}
 .journey{gap:0;position:relative;padding-left:32px}
 .journey::before{content:"";position:absolute;left:10px;top:10px;bottom:10px;width:3px;border-radius:2px;background:linear-gradient(180deg,#9DB5F7,var(--blue-500) 45%,var(--blue-900))}
 .stage{background:none;border:0;border-radius:0;padding:0 0 22px}
 .stage::before{content:"";position:absolute;left:-31px;top:2px;width:15px;height:15px;border-radius:50%;background:#fff;border:3px solid var(--blue-500)}
 .stage .st-k{font-size:12.5px;margin-bottom:4px}.stage h3{font-size:17px;margin-bottom:2px}.stage p{font-size:14px;margin-bottom:10px}
 .stage .lvls{gap:6px}.lvl{padding:8px 10px;background:#fff}.lvl .code{min-width:54px;height:26px;font-size:12.5px}
 .lvl span{font-size:13.5px}.lvl small{font-size:12.5px}
 /* 6 bước: dạng hàng */
 .steps{grid-template-columns:1fr;row-gap:10px}
 .step{display:flex;gap:14px;align-items:flex-start;text-align:left;padding:12px 14px;background:#fff;border:1px solid var(--line);border-radius:14px}
 .step .ic{width:44px;height:44px;margin:0;border-radius:12px;flex:0 0 auto}.step .ic .ico{width:22px;height:22px}
 .step::before{left:46px;top:4px;width:20px;height:20px;font-size:11px;line-height:20px;text-align:center}
 .step h3{font-size:15.5px;margin-bottom:2px}.step p{font-size:14px}
 /* giá trị, người học: hàng ngang */
 .val{display:flex;gap:14px;padding:16px}.val .ic{width:42px;height:42px;margin:0;flex:0 0 auto;border-radius:12px}
 .val h3{font-size:16px;margin-bottom:2px}.val p{font-size:14px}
 .who{padding:16px;gap:14px}.who h3{font-size:16px}.who p{font-size:14px}
 .grid{gap:10px}
}