/* Layout: mẫu DigitalMarketer — hero xanh đen, dải mint xen trắng, nút pill xanh lá gradient, tiêu đề căn giữa có 1 từ nhấn xanh */
:root{
  --navy:#111827; --navy-2:#1a2234; --navy-line:#262f45;
  --green:#00d45b; --green-2:#00a84a; --green-ink:#0b8a43; --green-soft:#ddf7e8;
  --mint:#f3faf6; --bg:#ffffff; --surface:#ffffff; --surface-2:#f6f8f7;
  --ink:#212121; --ink-2:#111827; --muted:#4b5563; --muted-2:#6b7280; --line:#e3e9e6;
  --blue:#0ea5e9; --blue-2:#0284c7; --teal:#059669; --teal-2:#047857; --violet:#8b5cf6; --violet-2:#7c3aed;
  --warn:#d97706; --warn-soft:#fef3c7; --danger:#dc2626; --danger-soft:#fee2e2; --info-soft:#e0f2fe;
  --orange:#f26a1b;
  --shadow:0 10px 30px -12px rgba(17,24,39,.18); --shadow-sm:0 4px 14px -6px rgba(17,24,39,.15);
  --f-head:"Plus Jakarta Sans","Nunito Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --f-body:"Nunito Sans","Plus Jakarta Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --r:14px; --pill:999px; --wrap:1180px;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0d1320; --surface:#151d2e; --surface-2:#111a29; --mint:#0f1a22;
  --ink:#e8ecf3; --ink-2:#f3f6fa; --muted:#a7b0c0; --muted-2:#8a94a6; --line:#243047;
  --green-soft:#0f3324; --green-ink:#3fe08a; --warn-soft:#3a2a0b; --danger-soft:#3b1414; --info-soft:#0b2a3c;
  --shadow:0 10px 30px -12px rgba(0,0,0,.6); --shadow-sm:0 4px 14px -6px rgba(0,0,0,.5); color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0d1320; --surface:#151d2e; --surface-2:#111a29; --mint:#0f1a22;
  --ink:#e8ecf3; --ink-2:#f3f6fa; --muted:#a7b0c0; --muted-2:#8a94a6; --line:#243047;
  --green-soft:#0f3324; --green-ink:#3fe08a; --warn-soft:#3a2a0b; --danger-soft:#3b1414; --info-soft:#0b2a3c;
  --shadow:0 10px 30px -12px rgba(0,0,0,.6); --shadow-sm:0 4px 14px -6px rgba(0,0,0,.5); color-scheme:dark}

*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:60;background:var(--surface)}
h1,h2,h3,h4{font-family:var(--f-head);color:var(--ink-2);margin:0;text-wrap:balance;letter-spacing:-.01em}
p{margin:0}
a{color:var(--green-ink)}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:3px solid var(--green);outline-offset:2px;border-radius:6px}
.wrap{max-width:var(--wrap);margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.hl{color:var(--green)}
.on-light .hl,.sec .hl{color:#00b84f}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.tnum{font-variant-numeric:tabular-nums}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;cursor:pointer;text-decoration:none;font-family:var(--f-head);font-weight:700;border-radius:var(--pill);padding:14px 30px;font-size:17px;line-height:1.2;transition:transform .15s,box-shadow .15s,filter .15s;white-space:nowrap}
.btn-green{background:linear-gradient(180deg,#14dd6a 0%,#00b84f 100%);color:#fff;box-shadow:0 4px 0 #078a3d,0 10px 22px -8px rgba(0,184,79,.6)}
.btn-green:hover{transform:translateY(-1px);filter:brightness(1.04)}
.btn-green:active{transform:translateY(2px);box-shadow:0 2px 0 #078a3d}
.btn-ghost{background:transparent;color:var(--ink-2);border:1.5px solid var(--line)}
.btn-ghost:hover{border-color:var(--green)}
.btn-sm{padding:9px 18px;font-size:14.5px}
.btn-xs{padding:6px 12px;font-size:13px;font-weight:600}
.btn-dark{background:var(--navy);color:#fff}
.btn-danger{background:transparent;color:var(--danger);border:1.5px solid color-mix(in srgb,var(--danger) 40%,transparent)}
.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none}

/* ---------- Header ---------- */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:50;background:var(--surface);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:20px;height:68px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink-2);flex:none}
.logo-mark{background:var(--orange);color:#fff;font-family:var(--f-head);font-weight:800;font-size:18px;letter-spacing:-.02em;padding:5px 11px 6px;border-radius:10px;box-shadow:inset 0 -3px 0 rgba(0,0,0,.18);line-height:1.1}
.logo-mark small{font-size:10px;font-weight:700;margin-left:2px;opacity:.85}
.logo-txt{font-family:var(--f-head);font-weight:700;font-size:15px;line-height:1.15}
.logo-txt span{display:block;font-weight:500;font-size:12px;color:var(--muted-2)}
.nav{display:flex;gap:4px;margin-left:auto;align-items:center}
.nav a{color:var(--ink);text-decoration:none;font-weight:600;font-size:15.5px;padding:8px 12px;border-radius:8px}
.nav a:hover{color:var(--green-ink)}
.nav a.cur{color:var(--green-ink)}
.top-cta{display:flex;gap:8px;align-items:center}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:10px;padding:8px 10px;cursor:pointer;margin-left:auto}
.demo-bar{background:var(--navy);color:#cbd5e1;font-size:13px}
.demo-bar .wrap{display:flex;gap:6px 14px;align-items:center;flex-wrap:wrap;padding-block:7px}
.demo-bar b{color:#fff;font-family:var(--f-head);font-size:12px;letter-spacing:.08em;text-transform:uppercase}
.demo-bar a{color:#cbd5e1;text-decoration:none;padding:3px 10px;border-radius:999px;border:1px solid #334155;font-weight:600}
.demo-bar a.cur,.demo-bar a:hover{background:var(--green);border-color:var(--green);color:#06210f}
@media (max-width:980px){
  .nav{display:none;position:absolute;top:68px;left:0;right:0;flex-direction:column;align-items:stretch;background:var(--surface);border-bottom:1px solid var(--line);padding:8px max(16px,env(safe-area-inset-right,0px)) 16px max(16px,env(safe-area-inset-left,0px));box-shadow:var(--shadow)}
  .nav.open{display:flex}
  .menu-btn{display:block}
  .top-cta .btn-ghost{display:none}
  .logo-txt{display:none}
}

/* ---------- Sections ---------- */
.sec{padding-block:88px}
.sec.mint{background:var(--mint)}
.sec-head{text-align:center;max-width:760px;margin:0 auto 52px}
.sec-head h2{font-size:clamp(28px,4vw,42px);font-weight:700;line-height:1.18;letter-spacing:-.02em}
.sec-head p{margin-top:14px;font-size:clamp(16px,1.8vw,19px);color:var(--muted);font-family:var(--f-head)}
.eyebrow{display:inline-block;font-family:var(--f-head);font-weight:700;font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--green-ink);margin-bottom:12px}
.center{text-align:center}
.cta-row{display:flex;flex-direction:column;align-items:center;gap:12px;margin-top:48px;text-align:center}
.cta-row p{font-family:var(--f-head);color:var(--muted);font-size:17px}

/* Hero */
.hero{background:var(--navy);color:#fff;position:relative;overflow:hidden}
.hero .wrap{position:relative;padding-block:92px 96px;text-align:center}
.hero h1{color:#fff;font-size:clamp(34px,6vw,64px);font-weight:700;line-height:1.12;letter-spacing:-.025em;max-width:1000px;margin:0 auto}
.hero .sub{font-family:var(--f-head);font-size:clamp(17px,2vw,20px);color:#e5e7eb;max-width:640px;margin:22px auto 0}
.hero .note{font-family:var(--f-head);font-style:italic;font-size:14px;color:#d1d5db;margin-top:16px}
.hero .actions{margin-top:34px;display:flex;flex-direction:column;align-items:center;gap:6px}
.gears{position:absolute;right:-120px;top:-40px;width:620px;height:620px;opacity:.07;pointer-events:none}
.gears.l{left:-260px;right:auto;top:auto;bottom:-300px;width:520px;height:520px;opacity:.05}
.offer-chip{display:inline-flex;align-items:center;gap:10px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:999px;padding:6px 8px 6px 16px;font-family:var(--f-head);font-weight:600;font-size:14px;margin-bottom:26px;color:#e5e7eb}
.offer-chip .tm{background:var(--green);color:#06210f;border-radius:999px;padding:3px 11px;font-weight:800;font-variant-numeric:tabular-nums}

/* Trust */
.trust{background:var(--mint);padding-block:44px 52px;text-align:center}
.trust h3{font-weight:500;color:var(--muted);font-size:clamp(17px,2vw,21px)}
.trust h3 b{color:var(--green-ink);font-weight:600}
.plats{display:flex;flex-wrap:wrap;justify-content:center;gap:14px 46px;margin-top:24px}
.plats span{font-family:var(--f-head);font-weight:800;font-size:clamp(20px,2.4vw,27px);color:var(--muted-2);opacity:.75;letter-spacing:-.02em}
.plats span i{font-style:italic}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;max-width:900px;margin:36px auto 0}
.stat{background:var(--surface);border-radius:var(--r);padding:18px 12px;box-shadow:var(--shadow-sm)}
.stat b{display:block;font-family:var(--f-head);font-size:30px;font-weight:800;color:var(--ink-2);letter-spacing:-.02em}
.stat span{font-size:14px;color:var(--muted)}
@media (max-width:720px){.stats{grid-template-columns:repeat(2,1fr)}}

/* Pain cards */
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:28px 40px;max-width:1080px;margin:0 auto}
.pain{background:var(--mint);border-radius:var(--r);padding:34px 32px 30px;text-align:center;box-shadow:0 14px 30px -18px rgba(17,24,39,.25);border-bottom:3px solid var(--green-soft)}
.ico{width:76px;height:76px;border-radius:50%;background:var(--green-soft);display:grid;place-items:center;margin:0 auto 18px;color:#00a84a}
.ico svg{width:36px;height:36px}
.pain h3{font-size:21px;font-weight:600;margin-bottom:8px}
.pain p{color:var(--muted);font-size:16px}
@media (max-width:760px){.grid2{grid-template-columns:1fr}}

/* Steps */
.step{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center;max-width:1080px;margin:0 auto}
.step + .step{margin-top:44px;padding-top:44px;border-top:1px solid var(--line)}
.step.rev .step-txt{order:2}
.step h3{font-size:25px;font-weight:600;margin-bottom:16px}
.step .lead{font-weight:700;color:var(--ink-2);margin-bottom:12px}
.step p{color:var(--muted);font-size:17px}
.quote{margin-top:22px;background:var(--green-soft);border-left:5px solid #00a84a;padding:13px 18px;font-family:var(--f-head);font-weight:600;font-style:italic;color:var(--ink-2);box-shadow:var(--shadow-sm);display:inline-block}
.mock{background:var(--surface);border-radius:18px;box-shadow:var(--shadow);padding:22px;border:1px solid var(--line);min-width:0}
.mock h5{font-family:var(--f-head);font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted-2);margin:0 0 12px}
.bars{display:flex;align-items:flex-end;gap:10px;height:150px;padding-top:8px;border-bottom:1px solid var(--line)}
.bars i{flex:1;background:linear-gradient(180deg,#14dd6a,#00a84a);border-radius:6px 6px 0 0;display:block}
.bars i.g{background:var(--line)}
.mrow{display:flex;justify-content:space-between;gap:10px;padding:9px 0;border-bottom:1px dashed var(--line);font-size:14.5px}
.mrow:last-child{border-bottom:0}
.chk{display:flex;gap:10px;align-items:flex-start;padding:7px 0;font-size:15px}
.chk .b{flex:none;width:20px;height:20px;border-radius:6px;border:2px solid var(--line);display:grid;place-items:center;margin-top:2px}
.chk.done .b{background:#00b84f;border-color:#00b84f;color:#fff}
.chk.done span{color:var(--muted-2);text-decoration:line-through}
@media (max-width:860px){.step{grid-template-columns:1fr;gap:28px}.step.rev .step-txt{order:0}}

/* Inside / features */
.inside{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;max-width:1100px;margin:0 auto}
.inside h3{font-size:24px;margin-bottom:18px}
.feat{display:grid;grid-template-columns:44px 1fr;gap:14px;padding:10px 0}
.feat svg{width:40px;height:40px;color:#00a84a}
.feat h4{font-size:19px;font-weight:600}
.feat p{color:var(--muted);font-size:16px}
.screen{background:#0b1220;border-radius:18px;padding:12px;box-shadow:var(--shadow)}
.screen-in{background:var(--surface);border-radius:10px;overflow:hidden}
.scr-top{display:flex;align-items:center;gap:6px;padding:9px 12px;border-bottom:1px solid var(--line);font-size:12px;color:var(--muted-2)}
.scr-top i{width:9px;height:9px;border-radius:50%;background:var(--line);display:block}
.scr-body{display:grid;grid-template-columns:120px 1fr;min-height:260px}
.scr-side{background:var(--surface-2);padding:12px 10px;font-size:12px;display:flex;flex-direction:column;gap:6px;color:var(--muted)}
.scr-side b{background:var(--green);color:#06210f;padding:4px 8px;border-radius:6px;font-weight:700}
.scr-main{padding:14px;display:flex;flex-direction:column;gap:10px;min-width:0}
.scr-card{border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-size:12.5px}
.scr-card .pb{height:7px;background:var(--line);border-radius:9px;margin-top:6px;overflow:hidden}
.scr-card .pb i{display:block;height:100%;background:#00b84f;border-radius:9px}
@media (max-width:860px){.inside{grid-template-columns:1fr;gap:32px}}
@media (max-width:460px){.scr-body{grid-template-columns:1fr}.scr-side{display:none}}

/* Courses */
.courses{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.course{background:var(--surface);border:1px solid var(--line);border-radius:16px;overflow:hidden;display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s}
.course:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.c-cover{aspect-ratio:16/8;max-width:100%;position:relative;display:flex;align-items:flex-end;padding:16px;color:#fff;font-family:var(--f-head)}
.c-cover b{font-size:22px;font-weight:800;line-height:1.15;letter-spacing:-.02em;text-shadow:0 2px 12px rgba(0,0,0,.25)}
.c-cover .tag{position:absolute;top:14px;left:14px;background:rgba(255,255,255,.2);backdrop-filter:blur(4px);padding:3px 10px;border-radius:999px;font-size:12px;font-weight:700}
.c-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:12px;flex:1}
.c-body h3{font-size:19px;font-weight:700}
.c-meta{display:flex;gap:14px;font-size:14px;color:var(--muted-2);font-weight:600}
.c-body ol{margin:0;padding-left:20px;color:var(--muted);font-size:15px;display:flex;flex-direction:column;gap:3px}
.c-body .btn{margin-top:auto;align-self:flex-start}
.course.more{background:var(--navy);border-color:var(--navy);color:#e5e7eb;justify-content:center;padding:28px}
.course.more h3{color:#fff;font-size:22px}
@media (max-width:980px){.courses{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.courses{grid-template-columns:1fr}}

/* Pricing */
.price-wrap{display:grid;grid-template-columns:1fr 1fr;gap:32px;max-width:1080px;margin:0 auto;align-items:stretch}
.plan{background:var(--surface);border-radius:20px;padding:34px;box-shadow:var(--shadow);border:2px solid #00b84f;position:relative;display:flex;flex-direction:column;gap:16px}
.plan .ribbon{position:absolute;top:-14px;left:34px;background:linear-gradient(180deg,#14dd6a,#00b84f);color:#fff;font-family:var(--f-head);font-weight:800;font-size:13px;padding:5px 14px;border-radius:999px}
.plan h3{font-size:22px}
.old{font-family:var(--f-head);color:var(--muted-2);text-decoration:line-through;font-size:20px;font-weight:600}
.now{font-family:var(--f-head);font-size:clamp(40px,5vw,54px);font-weight:800;letter-spacing:-.03em;color:var(--ink-2);line-height:1}
.now small{font-size:18px;font-weight:600;color:var(--muted)}
.save{display:inline-block;background:var(--green-soft);color:var(--green-ink);font-weight:800;font-family:var(--f-head);font-size:14px;padding:4px 12px;border-radius:999px}
.ticks{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px}
.ticks li{display:grid;grid-template-columns:22px 1fr;gap:10px;font-size:16px}
.ticks li::before{content:"";width:20px;height:20px;margin-top:3px;border-radius:50%;background:#00b84f url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12.5l4.5 4.5L19 7.5'/%3E%3C/svg%3E") center/12px no-repeat}
.countdown{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-family:var(--f-head);font-weight:600;font-size:14.5px;color:var(--muted)}
.countdown .tm{background:var(--navy);color:#fff;border-radius:8px;padding:4px 10px;font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:.02em}
.renew-card{background:var(--navy);color:#e5e7eb;border-radius:20px;padding:34px;display:flex;flex-direction:column;gap:18px}
.renew-card h3{color:#fff;font-size:22px}
.renew-card .now{color:#fff}
.renew-card .now small{color:#9ca3af}
.timeline{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:0}
.timeline li{display:grid;grid-template-columns:30px 1fr;gap:12px;position:relative;padding-bottom:16px;font-size:15px}
.timeline li::before{content:attr(data-n);width:28px;height:28px;border-radius:50%;background:#1f2a40;border:1.5px solid #3b4762;color:#fff;font-family:var(--f-head);font-weight:800;font-size:13px;display:grid;place-items:center;z-index:1}
.timeline li::after{content:"";position:absolute;left:13.5px;top:28px;bottom:0;width:1.5px;background:#3b4762}
.timeline li:last-child::after{display:none}
.timeline li b{color:#fff;font-family:var(--f-head)}
.timeline li.g::before{background:#00b84f;border-color:#00b84f}
@media (max-width:860px){.price-wrap{grid-template-columns:1fr}}

/* Testimonials */
.dark{background:var(--navy);color:#e5e7eb}
.dark .sec-head h2{color:#fff}
.dark .sec-head p{color:#cbd5e1}
.tgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.tcard{background:#f3faf6;color:#1f2937;border-radius:16px;padding:26px;display:flex;flex-direction:column;gap:12px;position:relative}
.tcard h4{color:#111827;font-size:18px;font-weight:700}
.tcard p{color:#4b5563;font-size:15.5px}
.tcard .who{font-weight:700;color:#0b8a43;font-size:14.5px;margin-top:auto}
.stars{color:#f59e0b;letter-spacing:2px;font-size:16px}
.sample{position:absolute;top:14px;right:14px;font-size:11px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;background:#fde68a;color:#78350f;padding:2px 8px;border-radius:999px}
@media (max-width:900px){.tgrid{grid-template-columns:1fr}}

/* Teacher */
.teacher{display:grid;grid-template-columns:360px 1fr;gap:56px;align-items:center;max-width:1080px;margin:0 auto}
.avatar{aspect-ratio:1;max-width:100%;border-radius:22px;position:relative;overflow:hidden;background:linear-gradient(140deg,#14dd6a,#047857);display:grid;place-items:center;box-shadow:var(--shadow)}
.avatar span{font-family:var(--f-head);font-weight:800;font-size:92px;color:rgba(255,255,255,.92);letter-spacing:-.04em}
.avatar img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.teacher h3{font-size:30px}
.teacher .role{color:var(--green-ink);font-weight:700;font-family:var(--f-head);margin:6px 0 16px}
.teacher p{color:var(--muted);font-size:17px}
.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:24px}
.facts div{border:1px solid var(--line);border-radius:12px;padding:14px}
.facts b{display:block;font-family:var(--f-head);font-size:24px;color:var(--ink-2)}
.facts span{font-size:13.5px;color:var(--muted)}
@media (max-width:860px){.teacher{grid-template-columns:1fr;gap:28px}.avatar{max-width:340px}}
@media (max-width:480px){.facts{grid-template-columns:1fr 1fr}}

/* Compare */
.compare{max-width:1080px;margin:0 auto;background:var(--surface);box-shadow:var(--shadow);border:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;padding:30px 10px}
.compare>div{padding:0 26px;min-width:0}
.compare>div+div{border-left:3px solid #00a84a}
.compare h4{text-align:center;font-size:20px;margin-bottom:16px;color:#00a84a}
.compare>div+div h4{color:var(--muted-2)}
.compare ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:12px}
.compare li{display:grid;grid-template-columns:20px 1fr;gap:10px;font-size:16.5px}
.compare li::before{content:"✓";color:#00b84f;font-weight:900}
.compare>div+div li{color:var(--muted)}
.compare>div+div li::before{content:"✕";color:var(--danger)}
@media (max-width:760px){.compare{grid-template-columns:1fr;gap:26px}.compare>div+div{border-left:0;border-top:3px solid #00a84a;padding-top:22px}}

/* Paths */
.paths{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.path{border-radius:16px;padding:34px 28px;color:#fff;text-align:center;display:flex;flex-direction:column;align-items:center;gap:14px}
.path svg{width:58px;height:58px}
.path h3{color:#fff;font-size:22px}
.path p{color:rgba(255,255,255,.92);font-size:16px}
.path .btn{margin-top:auto;background:#fff;color:#111827}
.p1{background:linear-gradient(180deg,var(--blue),var(--blue-2))}
.p2{background:linear-gradient(180deg,var(--teal),var(--teal-2))}
.p3{background:linear-gradient(180deg,var(--violet),var(--violet-2))}
@media (max-width:900px){.paths{grid-template-columns:1fr}}

/* Blog */
.posts{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post{background:var(--surface);border:1px solid var(--line);border-radius:14px;overflow:hidden;display:flex;flex-direction:column}
.thumb{aspect-ratio:16/9;max-width:100%;position:relative;overflow:hidden;display:flex;align-items:flex-end;padding:12px}
.thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.thumb .cat{position:relative;background:rgba(17,24,39,.75);color:#fff;font-size:12px;font-weight:700;padding:3px 10px;border-radius:999px}
.post-b{padding:16px 18px 18px;display:flex;flex-direction:column;gap:8px;flex:1}
.post-b h4{font-size:17px;line-height:1.35}
.post-b .meta{font-size:13px;color:var(--muted-2);display:flex;gap:10px;flex-wrap:wrap}
.post-b .more{margin-top:auto;font-weight:800;font-size:13px;letter-spacing:.04em;color:#00a84a;text-transform:uppercase;text-decoration:none}
.ai-badge{display:inline-flex;align-items:center;gap:4px;background:var(--info-soft);color:var(--blue-2);font-weight:800;font-size:11.5px;padding:2px 8px;border-radius:999px}
.yt{margin-top:28px;display:grid;grid-template-columns:auto 1fr auto;gap:20px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:20px 24px}
.yt .play{width:64px;height:46px;border-radius:12px;background:#ff0033;display:grid;place-items:center}
.yt h4{font-size:18px}
.yt p{color:var(--muted);font-size:15px}
@media (max-width:900px){.posts{grid-template-columns:1fr 1fr}}
@media (max-width:600px){.posts{grid-template-columns:1fr}.yt{grid-template-columns:1fr}}

/* FAQ */
.faq{max-width:920px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq details{background:var(--surface);border-bottom:2px solid #00a84a;box-shadow:var(--shadow-sm)}
.faq summary{cursor:pointer;list-style:none;padding:18px 22px;font-family:var(--f-head);font-weight:700;font-size:17px;color:var(--ink-2);display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:22px;line-height:1;color:#00a84a;flex:none}
.faq details[open] summary::after{content:"–"}
.faq details p{padding:0 22px 20px;color:var(--muted)}

/* CTA band */
.band{background:radial-gradient(1200px 400px at 20% 100%,#4fbf7f 0%,transparent 60%),radial-gradient(900px 500px at 100% 0%,#047a3a 0%,transparent 60%),#1f9a55}
.band .card{background:var(--surface);border-radius:16px;max-width:920px;margin:0 auto;padding:48px 32px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:16px}
.band .card h2{font-size:clamp(28px,4vw,40px)}
.band .card p{color:var(--muted);font-size:18px;max-width:620px;font-family:var(--f-head)}
.band .fine{font-size:14px;color:var(--muted-2);font-style:italic}

/* Newsletter + footer */
.news{text-align:center}
.news h2{font-size:clamp(24px,3vw,32px)}
.news p{color:var(--muted);margin-top:10px}
.news form{display:flex;gap:10px;max-width:560px;margin:24px auto 8px;flex-wrap:wrap;justify-content:center}
.news input{flex:1 1 260px;min-width:0;border:1.5px solid var(--line);background:var(--surface);border-radius:999px;padding:13px 20px}
.foot{background:var(--navy);color:#9ca3af;font-size:14.5px}
.foot .wrap{display:flex;flex-wrap:wrap;gap:16px 30px;justify-content:space-between;align-items:center;padding-block:28px}
.foot a{color:#e5e7eb;text-decoration:none;margin-right:18px}
.foot .zalo{color:#fff;font-weight:700}

/* ---------- App views ---------- */
.view[hidden]{display:none!important}
.app{background:var(--surface-2);min-height:70vh;padding-block:36px 72px}
.app-head{display:flex;flex-wrap:wrap;gap:14px;align-items:flex-end;justify-content:space-between;margin-bottom:24px}
.app-head h1{font-size:clamp(24px,3vw,32px)}
.app-head p{color:var(--muted)}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:24px;min-width:0}
.panel h3{font-size:18px;margin-bottom:14px}
.cols{display:grid;grid-template-columns:1.25fr .75fr;gap:24px;align-items:start}
.cols.w{grid-template-columns:.85fr 1.15fr}
@media (max-width:900px){.cols,.cols.w{grid-template-columns:1fr}}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field label{font-weight:700;font-size:14px;color:var(--ink-2)}
.field input,.field select,.field textarea{border:1.5px solid var(--line);background:var(--surface);border-radius:10px;padding:11px 14px;width:100%;min-width:0}
.field textarea{min-height:90px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{border-color:#00b84f;outline:none;box-shadow:0 0 0 3px var(--green-soft)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:560px){.row2{grid-template-columns:1fr}}
.opt{display:flex;gap:10px;align-items:flex-start;border:1.5px solid var(--line);border-radius:12px;padding:12px 14px;cursor:pointer;margin-bottom:10px}
.opt:has(input:checked){border-color:#00b84f;background:var(--green-soft)}
.opt input{margin-top:5px;accent-color:#00b84f}
.opt b{display:block;font-family:var(--f-head)}
.opt small{color:var(--muted)}
.sum .mrow b{font-family:var(--f-head)}
.sum .total{font-size:22px;font-weight:800;color:var(--ink-2);font-family:var(--f-head)}
.qr{border:2px dashed var(--line);border-radius:12px;padding:18px;text-align:center;color:var(--muted-2);font-size:14px;margin-top:14px}
.hint{font-size:13.5px;color:var(--muted-2)}

.pill{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:3px 10px;font-weight:700;font-size:12.5px;white-space:nowrap}
.pill::before{content:"";width:7px;height:7px;border-radius:50%;background:currentColor}
.s-pending{background:var(--info-soft);color:var(--blue-2)}
.s-active{background:var(--green-soft);color:var(--green-ink)}
.s-soon{background:var(--warn-soft);color:var(--warn)}
.s-expired{background:var(--danger-soft);color:var(--danger)}
.s-locked{background:var(--surface-2);color:var(--muted-2);border:1px solid var(--line)}

.seg{display:inline-flex;flex-wrap:wrap;gap:4px;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:4px}
.seg button{border:0;background:transparent;border-radius:9px;padding:7px 12px;font-weight:700;font-size:13.5px;cursor:pointer;color:var(--muted)}
.seg button.on{background:var(--navy);color:#fff}

.alert{display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:center;border-radius:14px;padding:16px 18px;margin-bottom:20px}
.alert svg{width:26px;height:26px}
.alert b{font-family:var(--f-head);font-size:16px;display:block}
.alert.warn{background:var(--warn-soft);color:var(--warn)}
.alert.danger{background:var(--danger-soft);color:var(--danger)}
.alert.info{background:var(--info-soft);color:var(--blue-2)}
.alert.ok{background:var(--green-soft);color:var(--green-ink)}
.alert p{color:var(--ink);font-size:15px}
@media (max-width:600px){.alert{grid-template-columns:1fr}}

.access{display:grid;grid-template-columns:auto 1fr;gap:22px;align-items:center}
.ring{width:132px;height:132px;position:relative}
.ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.ring div{position:absolute;inset:0;display:grid;place-items:center;text-align:center;font-family:var(--f-head)}
.ring b{font-size:30px;font-weight:800;display:block;line-height:1;color:var(--ink-2)}
.ring small{font-size:12px;color:var(--muted)}
.kv{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.kv div{background:var(--surface-2);border-radius:10px;padding:10px 12px}
.kv span{font-size:12.5px;color:var(--muted-2);display:block}
.kv b{font-family:var(--f-head);font-variant-numeric:tabular-nums}
.kv span.pill{display:inline-flex;font-size:12.5px;color:inherit}
.kv span.pill.s-expired,.kv span.pill.s-locked{color:var(--danger)}
.kv span.pill.s-active{color:var(--green-ink)}.kv span.pill.s-soon{color:var(--warn)}.kv span.pill.s-pending{color:var(--blue-2)}
@media (max-width:560px){.access{grid-template-columns:1fr;justify-items:center}.kv{width:100%}}

.mycourses{display:flex;flex-direction:column;gap:12px}
.mc{display:grid;grid-template-columns:56px 1fr auto;gap:14px;align-items:center;border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.mc .sw{width:56px;height:56px;border-radius:10px}
.mc h4{font-size:16px}
.mc .pb{height:7px;background:var(--line);border-radius:9px;margin-top:6px;overflow:hidden;max-width:320px}
.mc .pb i{display:block;height:100%;background:#00b84f;border-radius:9px}
.mc.lock{opacity:.6}
.mc small{color:var(--muted-2)}
@media (max-width:520px){.mc{grid-template-columns:44px 1fr}.mc .sw{width:44px;height:44px}.mc>:last-child{grid-column:1/-1}}

.months{display:flex;gap:8px;flex-wrap:wrap;margin:6px 0 14px}
.months button{border:1.5px solid var(--line);background:var(--surface);border-radius:10px;padding:8px 14px;font-weight:800;cursor:pointer;font-family:var(--f-head)}
.months button[disabled]{opacity:.45;cursor:not-allowed}
.months button.on{border-color:#00b84f;background:var(--green-soft);color:var(--green-ink)}

.notif{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}
.notif li{padding:10px 0;border-bottom:1px solid var(--line);font-size:14.5px;display:grid;grid-template-columns:10px 1fr;gap:10px}
.notif li::before{content:"";width:8px;height:8px;border-radius:50%;background:#00b84f;margin-top:8px}
.notif li.w::before{background:var(--warn)}
.notif li.d::before{background:var(--danger)}
.notif small{display:block;color:var(--muted-2);font-size:12.5px}

/* Admin */
.tabs{display:flex;gap:6px;flex-wrap:wrap;border-bottom:1px solid var(--line);margin-bottom:22px}
.tabs button{border:0;background:none;padding:10px 14px;font-weight:700;color:var(--muted);cursor:pointer;border-bottom:3px solid transparent;font-family:var(--f-head);font-size:15px;display:inline-flex;gap:6px;align-items:center}
.tabs button.on{color:var(--ink-2);border-bottom-color:#00b84f}
.tabs .n{background:var(--danger);color:#fff;border-radius:999px;font-size:11px;padding:1px 7px}
.kpis{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-bottom:22px}
.kpi{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:14px 16px;border-top:4px solid var(--line)}
.kpi span{font-size:13px;color:var(--muted);font-weight:600}
.kpi b{display:block;font-family:var(--f-head);font-size:28px;font-weight:800;color:var(--ink-2);font-variant-numeric:tabular-nums}
.kpi.k1{border-top-color:var(--blue)} .kpi.k2{border-top-color:#00b84f} .kpi.k3{border-top-color:var(--warn)} .kpi.k4{border-top-color:var(--danger)} .kpi.k5{border-top-color:var(--violet)}
@media (max-width:980px){.kpis{grid-template-columns:repeat(3,1fr)}}
@media (max-width:560px){.kpis{grid-template-columns:repeat(2,1fr)}.kpi.k5{grid-column:1/-1}}
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px;background:var(--surface)}
table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:860px}
th{text-align:left;font-family:var(--f-head);font-size:12.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted-2);padding:12px 14px;border-bottom:1px solid var(--line);background:var(--surface-2)}
td{padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top}
tr:last-child td{border-bottom:0}
td .nm{font-weight:700;color:var(--ink-2)}
td small{color:var(--muted-2)}
.chips{display:flex;flex-wrap:wrap;gap:4px}
.chip{font-size:12px;font-weight:700;border-radius:6px;padding:2px 7px;background:var(--surface-2);border:1px solid var(--line)}
.act{display:flex;gap:6px;flex-wrap:wrap}
.toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:14px}
.toolbar input,.toolbar select{border:1.5px solid var(--line);background:var(--surface);border-radius:10px;padding:9px 12px;min-width:0}
.toolbar input{flex:1 1 220px}

.drawer{position:fixed;inset:0;z-index:80;display:grid;place-items:center;background:rgba(10,15,25,.55);padding:16px}
.drawer .panel{width:min(560px,100%);max-height:calc(100vh - 32px);overflow:auto;box-shadow:var(--shadow)}
.drawer .head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.x{border:0;background:var(--surface-2);border-radius:8px;width:34px;height:34px;cursor:pointer;font-size:18px}

.toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom,0px));transform:translateX(-50%) translateY(20px);background:var(--navy);color:#fff;padding:12px 18px;border-radius:12px;font-weight:600;box-shadow:var(--shadow);opacity:0;transition:.25s;z-index:90;max-width:calc(100% - 32px)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* AI writer */
.pipeline{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:16px}
.pipeline span{font-size:12.5px;font-weight:700;padding:5px 10px;border-radius:999px;background:var(--surface-2);border:1px solid var(--line);color:var(--muted-2)}
.pipeline span.on{background:var(--green-soft);border-color:#00b84f;color:var(--green-ink)}
.pipeline span.run{background:var(--info-soft);border-color:var(--blue);color:var(--blue-2)}
.draft{border:1px solid var(--line);border-radius:12px;padding:20px 22px;min-height:280px;background:var(--surface);font-size:15.5px}
.draft h2{font-size:24px;margin-bottom:10px}
.draft h3{font-size:18px;margin:16px 0 6px}
.draft p,.draft li{color:var(--ink)}
.draft ul{padding-left:20px}
.draft .seo{background:var(--surface-2);border-radius:10px;padding:12px 14px;font-size:13.5px;margin-bottom:14px;display:grid;gap:4px}
.draft .seo b{font-family:var(--f-head)}
.empty{color:var(--muted-2);text-align:center;padding:60px 10px}
.caret::after{content:"▍";animation:blink 1s steps(1) infinite;color:#00b84f}
@keyframes blink{50%{opacity:0}}

/* Design doc */
.doc{max-width:980px;margin:0 auto;display:flex;flex-direction:column;gap:22px}
.doc h2{font-size:24px;margin-bottom:6px}
.doc p,.doc li{color:var(--muted)}
.doc .panel ul{margin:8px 0 0;padding-left:20px;display:flex;flex-direction:column;gap:6px}
.swatches{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:12px;margin-top:12px}
.sw-i{border:1px solid var(--line);border-radius:12px;overflow:hidden;font-size:13px}
.sw-i i{display:block;height:54px}
.sw-i div{padding:8px 10px}
.sw-i b{display:block;color:var(--ink-2)}
.code{background:#0b1220;color:#d1e7dd;border-radius:12px;padding:16px 18px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13px;line-height:1.55;overflow-x:auto;white-space:pre}
.flow{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:10px}
.flow span{background:var(--surface-2);border:1px solid var(--line);border-radius:10px;padding:8px 12px;font-weight:700;font-size:14px;color:var(--ink-2)}
.flow i{color:var(--muted-2);font-style:normal}
.map td:first-child{font-weight:700;color:var(--ink-2)}
.map table{min-width:640px}


/* ---------- Khóa phễu ---------- */
.funnel-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.fcard{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:26px;display:flex;flex-direction:column;gap:12px;position:relative;overflow:hidden}
.fcard .free{position:absolute;top:18px;right:18px;background:var(--green-soft);color:var(--green-ink);font-weight:800;font-size:12px;padding:3px 10px;border-radius:999px;letter-spacing:.04em;text-transform:uppercase}
.fcard .days{font-family:var(--f-head);font-weight:800;font-size:46px;line-height:1;color:var(--ink-2);letter-spacing:-.03em}
.fcard .days small{font-size:16px;font-weight:700;color:var(--muted)}
.fcard h3{font-size:20px}
.fcard p{color:var(--muted);font-size:15.5px}
.fcard .dots{display:flex;flex-wrap:wrap;gap:5px}
.fcard .dots i{width:14px;height:14px;border-radius:50%;border:2px solid #00b84f;display:block}
.fcard .dots i:first-child{background:#00b84f}
.fcard .btn{margin-top:auto;align-self:flex-start}
@media (max-width:900px){.funnel-cards{grid-template-columns:1fr}}

.fx-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:22px}
.fx-tabs button{border:1.5px solid var(--line);background:var(--surface);border-radius:999px;padding:9px 16px;font-weight:700;cursor:pointer;font-family:var(--f-head);font-size:14.5px;color:var(--ink)}
.fx-tabs button.on{background:var(--navy);border-color:var(--navy);color:#fff}
.fx-wrap{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:18px}
.fx-hero{background:linear-gradient(160deg,#0b8a43 0%,#06622f 100%);color:#fff;border-radius:20px;padding:26px 26px 22px}
.fx-hero .who{font-size:13px;opacity:.85;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}
.fx-hero h2{color:#fff;font-size:clamp(22px,3vw,28px);margin:6px 0 8px}
.fx-hero p{color:rgba(255,255,255,.9);font-size:15.5px}
.stamps{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:14px;padding:14px;margin-top:16px}
.stamps .lbl{display:flex;justify-content:space-between;font-size:12.5px;opacity:.85;margin-bottom:10px}
.stamps .row{display:flex;flex-wrap:wrap;gap:8px}
.stamps i{width:36px;height:36px;border-radius:50%;border:1.5px dashed rgba(255,255,255,.4);display:grid;place-items:center;font-style:normal;font-weight:800;font-size:13px;font-family:var(--f-head)}
.stamps i.ok{background:#f5c542;border:2px solid #f5c542;color:#4a3500}
.stamps i.cur{border:2px solid #f5c542;color:#f5c542}
.fx-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:12px}
.fx-stats div{background:rgba(0,0,0,.18);border-radius:10px;padding:10px 12px}
.fx-stats b{display:block;font-family:var(--f-head);font-size:20px}
.fx-stats span{font-size:12px;opacity:.8}
.offer-strip{display:flex;flex-wrap:wrap;gap:8px 14px;align-items:center;justify-content:space-between;background:var(--surface);border:1px solid var(--line);border-left:5px solid #00b84f;border-radius:12px;padding:12px 16px;font-size:15px}
.offer-strip b{font-family:var(--f-head)}
.offer-strip .tm{background:var(--navy);color:#fff;border-radius:8px;padding:3px 9px;font-weight:800;font-variant-numeric:tabular-nums;font-family:var(--f-head)}
.day{background:var(--surface);border:1px solid var(--line);border-radius:16px;overflow:hidden}
.day.cur{border:2px solid #f5c542;box-shadow:var(--shadow)}
.day-h{display:grid;grid-template-columns:52px 1fr auto;gap:14px;align-items:center;padding:16px 18px}
.day-n{width:52px;height:52px;border-radius:12px;background:var(--surface-2);display:grid;place-items:center;text-align:center;font-family:var(--f-head);font-weight:800;line-height:1;color:var(--muted-2)}
.day-n small{display:block;font-size:9px;letter-spacing:.08em;margin-top:2px}
.day.cur .day-n{background:#f5a524;color:#fff}
.day.done .day-n{background:#00b84f;color:#fff}
.day-h h4{font-size:17px}
.day-h p{font-size:14px;color:var(--muted)}
.day-h .meta{font-size:12.5px;color:var(--green-ink);font-weight:700;margin-top:2px}
.day.lock{opacity:.6}
.day-b{padding:0 18px 18px;display:flex;flex-direction:column;gap:12px}
.box-ok{background:var(--green-soft);border-radius:10px;padding:12px 14px;font-size:14.5px}
.box-ok b{color:var(--green-ink)}
.box-ex{background:var(--warn-soft);border-left:4px solid var(--warn);border-radius:10px;padding:12px 14px;font-size:14.5px}
.box-ex b{display:block;font-size:12.5px;color:var(--warn);margin-bottom:2px}
.task{display:grid;grid-template-columns:24px 1fr auto;gap:12px;align-items:start;padding:12px 4px;border-top:1px solid var(--line);cursor:pointer}
.task input{width:20px;height:20px;margin-top:2px;accent-color:#00b84f;cursor:pointer}
.task b{display:block;font-family:var(--f-head);font-size:15.5px;color:var(--ink-2)}
.task span{font-size:14px;color:var(--muted)}
.task em{font-style:normal;font-weight:800;font-size:12px;color:var(--green-ink);background:var(--green-soft);border-radius:999px;padding:2px 8px}
.task:has(input:checked) b{text-decoration:line-through;color:var(--muted-2)}
.day-b textarea{border:1.5px solid var(--line);border-radius:10px;padding:10px 12px;min-height:70px;background:var(--surface);width:100%;resize:vertical}
.invite{background:var(--navy);color:#e5e7eb;border-radius:20px;padding:30px;display:flex;flex-direction:column;gap:14px;position:relative;overflow:hidden}
.invite h2{color:#fff;font-size:clamp(22px,3vw,30px)}
.invite .price-big{font-family:var(--f-head);font-weight:800;font-size:clamp(34px,5vw,46px);color:#fff;line-height:1;letter-spacing:-.02em}
.invite .price-big s{font-size:18px;color:#9ca3af;font-weight:600;margin-left:8px}
.invite ul{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:6px}
.invite .cdbig{display:flex;gap:8px;flex-wrap:wrap;align-items:center;font-family:var(--f-head);font-weight:600}
.invite .cdbig .tm{background:#00d45b;color:#06210f;border-radius:10px;padding:6px 12px;font-size:22px;font-weight:800;font-variant-numeric:tabular-nums}
.invite .gears{opacity:.06;width:360px;height:360px;right:-90px;top:-90px}
.ladder{display:flex;gap:4px;align-items:flex-end;height:64px;margin-top:4px}
.ladder i{flex:1;background:#2b3650;border-radius:4px 4px 0 0;display:block;position:relative}
.ladder i.me{background:#00d45b}
.ladder-l{display:flex;justify-content:space-between;font-size:12px;color:#9ca3af}
.demo-tools{display:flex;gap:8px;flex-wrap:wrap;align-items:center;font-size:13px;color:var(--muted-2)}
.demo-bar select{background:#1f2937;color:#e5e7eb;border:1px solid #334155;border-radius:999px;padding:3px 10px;font-weight:600;font-size:13px}

/* ---------- Chat agent ---------- */
.chat-fab{position:fixed;right:calc(18px + env(safe-area-inset-right,0px));bottom:calc(18px + env(safe-area-inset-bottom,0px));z-index:70;display:flex;align-items:center;gap:10px;border:0;cursor:pointer;background:linear-gradient(180deg,#14dd6a,#00b84f);color:#fff;border-radius:999px;padding:12px 18px 12px 14px;font-family:var(--f-head);font-weight:800;font-size:15px;box-shadow:0 4px 0 #078a3d,0 14px 30px -10px rgba(0,120,50,.6)}
.chat-fab .av{width:30px;height:30px;border-radius:50%;background:#fff;color:#00a84a;display:grid;place-items:center;font-size:13px}
.chat{position:fixed;right:calc(18px + env(safe-area-inset-right,0px));bottom:calc(84px + env(safe-area-inset-bottom,0px));z-index:75;width:min(390px,calc(100vw - 36px));height:min(600px,calc(100vh - 120px));background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:0 24px 60px -20px rgba(10,15,25,.45);display:flex;flex-direction:column;overflow:hidden}
.chat-h{background:var(--navy);color:#fff;padding:14px 16px;display:grid;grid-template-columns:40px 1fr auto;gap:10px;align-items:center}
.chat-h .av{width:40px;height:40px;border-radius:50%;background:linear-gradient(140deg,#14dd6a,#047857);display:grid;place-items:center;font-family:var(--f-head);font-weight:800;position:relative}
.chat-h .av::after{content:"";position:absolute;right:0;bottom:0;width:10px;height:10px;border-radius:50%;background:#22c55e;border:2px solid var(--navy)}
.chat-h b{font-family:var(--f-head);display:block;font-size:15px}
.chat-h small{color:#9ca3af;font-size:12px}
.chat-h button{background:rgba(255,255,255,.1);border:0;color:#fff;width:32px;height:32px;border-radius:8px;cursor:pointer;font-size:18px}
.chat-body{flex:1;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:10px;background:var(--surface-2)}
.msg{max-width:86%;padding:10px 13px;border-radius:14px;font-size:14.5px;line-height:1.5;white-space:pre-line}
.msg.a{background:var(--surface);border:1px solid var(--line);border-bottom-left-radius:4px;align-self:flex-start}
.msg.u{background:#00b84f;color:#fff;border-bottom-right-radius:4px;align-self:flex-end}
.msg.typing{color:var(--muted-2);font-style:italic}
.chips-q{display:flex;flex-wrap:nowrap;overflow-x:auto;gap:6px;padding:8px 12px;border-top:1px solid var(--line);background:var(--surface)}
.chips-q button{flex:none;white-space:nowrap;border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:5px 10px;font-size:12.5px;font-weight:700;cursor:pointer;color:var(--green-ink)}
.chips-q button:hover{border-color:#00b84f}
.chat-in{display:flex;gap:8px;padding:10px 12px;border-top:1px solid var(--line);background:var(--surface)}
.chat-in input{flex:1;min-width:0;border:1.5px solid var(--line);border-radius:999px;padding:10px 14px;background:var(--surface)}
.chat-in button{border:0;background:#00b84f;color:#fff;border-radius:999px;width:42px;cursor:pointer;font-size:16px}
.kb{display:flex;flex-direction:column;gap:12px}
.kb-i{border:1px solid var(--line);border-radius:12px;padding:12px 14px;display:grid;gap:8px}
.kb-i input,.kb-i textarea{border:1.5px solid var(--line);border-radius:8px;padding:8px 10px;background:var(--surface);width:100%;min-width:0;font-size:14px}
.kb-i textarea{min-height:84px;resize:vertical}
.kb-i .t{font-weight:800;font-family:var(--f-head)}
.convo{border:1px solid var(--line);border-radius:12px;padding:12px 14px;display:grid;gap:6px;font-size:14px}
.convo .q{color:var(--muted)}
.convo .q b{color:var(--ink-2)}
.leads td:nth-child(2){white-space:nowrap}
.leads .chip{white-space:nowrap}
.leads .act{flex-direction:column;align-items:flex-start}


/* ---------- Trang học video ---------- */
.learn{background:var(--surface-2);padding-block:0 64px}
.lbar{background:var(--navy);color:#e5e7eb}
.lbar .wrap{display:flex;gap:14px;align-items:center;flex-wrap:wrap;padding-block:12px}
.lbar h1{color:#fff;font-size:17px;font-weight:700;flex:1 1 320px;min-width:0}
.lbar .prog{display:flex;align-items:center;gap:10px;font-size:13.5px;font-weight:700}
.lbar .prog .pb{width:140px;height:7px;background:#2b3650;border-radius:9px;overflow:hidden}
.lbar .prog .pb i{display:block;height:100%;background:#00d45b}
.lbar select{background:#1f2937;color:#e5e7eb;border:1px solid #334155;border-radius:10px;padding:7px 10px;font-weight:700;max-width:100%}
.lgrid{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:22px;align-items:start;margin-top:20px}
@media (max-width:1000px){.lgrid{grid-template-columns:1fr}}
.player{position:relative;aspect-ratio:16/9;max-width:100%;background:#05070c;border-radius:14px;overflow:hidden;user-select:none;-webkit-user-select:none}
.player:fullscreen{border-radius:0}
.pv{position:absolute;inset:0;display:grid;place-items:center;background:radial-gradient(800px 420px at 30% 20%,#1d3b2c 0%,transparent 60%),radial-gradient(700px 400px at 90% 100%,#13233f 0%,transparent 60%),#070b14;color:#fff;text-align:center;padding:24px}
.pv .ttl{font-family:var(--f-head);font-weight:800;font-size:clamp(18px,3vw,30px);max-width:80%;line-height:1.2;text-wrap:balance}
.pv .ch{font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:#7ee2a8;margin-bottom:10px;font-weight:800}
.pv .eq{display:flex;gap:4px;justify-content:center;height:26px;align-items:flex-end;margin-top:18px}
.pv .eq i{width:5px;background:#00d45b;border-radius:3px;display:block;height:30%}
.player.playing .pv .eq i{animation:eq 1s ease-in-out infinite}
.pv .eq i:nth-child(2){animation-delay:.15s}.pv .eq i:nth-child(3){animation-delay:.3s}.pv .eq i:nth-child(4){animation-delay:.45s}.pv .eq i:nth-child(5){animation-delay:.6s}
@keyframes eq{0%,100%{height:25%}50%{height:100%}}
.pv .demo-note{position:absolute;left:14px;top:12px;font-size:11.5px;color:#9ca3af;background:rgba(0,0,0,.35);padding:3px 8px;border-radius:999px}
.wm{position:absolute;z-index:3;color:rgba(255,255,255,.22);font-weight:800;font-size:13px;pointer-events:none;transition:left 1.2s ease,top 1.2s ease;white-space:nowrap;font-family:var(--f-head)}
.bigplay{position:absolute;z-index:4;left:50%;top:50%;transform:translate(-50%,-50%);width:76px;height:76px;border-radius:50%;border:0;background:rgba(0,212,91,.92);color:#06210f;cursor:pointer;display:grid;place-items:center;box-shadow:0 10px 30px rgba(0,0,0,.4)}
.player.playing .bigplay{display:none}
.ctrl{position:absolute;z-index:5;left:0;right:0;bottom:0;padding:26px 14px 10px;background:linear-gradient(transparent,rgba(0,0,0,.75));color:#fff;display:flex;flex-direction:column;gap:8px;opacity:1;transition:opacity .3s}
.player.playing.idle .ctrl{opacity:0}
.seek{position:relative;height:6px;background:rgba(255,255,255,.25);border-radius:9px;cursor:pointer}
.seek i{position:absolute;left:0;top:0;bottom:0;background:#00d45b;border-radius:9px;display:block}
.seek b{position:absolute;top:50%;width:14px;height:14px;border-radius:50%;background:#fff;transform:translate(-50%,-50%);display:block}
.crow{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.crow button,.crow select{background:transparent;border:0;color:#fff;cursor:pointer;font-weight:800;font-size:14px;padding:6px 8px;border-radius:8px;font-family:var(--f-head)}
.crow button:hover{background:rgba(255,255,255,.12)}
.crow select{background:rgba(255,255,255,.12)}
.crow select option{color:#111}
.crow .time{font-variant-numeric:tabular-nums;font-size:13px;opacity:.9;margin-left:4px}
.crow .sp{flex:1}
.lockv{position:absolute;inset:0;z-index:6;background:rgba(5,8,14,.9);display:grid;place-items:center;text-align:center;color:#e5e7eb;padding:24px}
.lockv h3{color:#fff;font-size:20px;margin:8px 0}
.lockv p{max-width:440px;margin:0 auto 14px}
.nextcard{position:absolute;z-index:6;right:14px;bottom:70px;background:rgba(17,24,39,.95);color:#fff;border-radius:12px;padding:12px 14px;max-width:300px;font-size:14px;display:grid;gap:8px}
.ltabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin:18px 0 14px;flex-wrap:wrap}
.ltabs button{border:0;background:none;padding:10px 12px;font-weight:700;color:var(--muted);cursor:pointer;border-bottom:3px solid transparent;font-family:var(--f-head)}
.ltabs button.on{color:var(--ink-2);border-bottom-color:#00b84f}
.lhead{display:flex;gap:10px;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;margin-top:16px}
.lhead h2{font-size:clamp(19px,2.4vw,24px)}
.lhead .nav2{display:flex;gap:8px}
.side{background:var(--surface);border:1px solid var(--line);border-radius:14px;overflow:hidden;position:sticky;top:calc(84px + env(safe-area-inset-top,0px));max-height:calc(100vh - 110px);display:flex;flex-direction:column}
@media (max-width:1000px){.side{position:static;max-height:none}}
.side-h{padding:14px 16px;border-bottom:1px solid var(--line);display:grid;gap:8px}
.side-h input{border:1.5px solid var(--line);border-radius:10px;padding:8px 12px;background:var(--surface);width:100%}
.side-b{overflow-y:auto}
.chap{border-bottom:1px solid var(--line)}
.chap>button{width:100%;text-align:left;border:0;background:var(--surface-2);padding:12px 16px;cursor:pointer;display:grid;grid-template-columns:1fr auto;gap:2px 10px;font-family:var(--f-head)}
.chap>button b{font-size:14.5px;color:var(--ink-2)}
.chap>button small{color:var(--muted-2);font-size:12px;grid-column:1}
.chap>button span{grid-row:1/3;grid-column:2;align-self:center;color:var(--muted-2)}
.les{display:grid;grid-template-columns:22px 1fr auto;gap:10px;align-items:start;padding:10px 16px;cursor:pointer;font-size:14px;border-top:1px solid var(--line);background:var(--surface)}
.les:hover{background:var(--surface-2)}
.les.cur{background:var(--green-soft)}
.les .st{width:18px;height:18px;border-radius:50%;border:2px solid var(--line);display:grid;place-items:center;font-size:11px;margin-top:2px;color:#fff}
.les.done .st{background:#00b84f;border-color:#00b84f}
.les .tt{color:var(--ink);line-height:1.4}
.les small{color:var(--muted-2);font-size:12px;display:block}
.les .tag{font-size:11px;font-weight:800;color:var(--green-ink);background:var(--green-soft);border-radius:999px;padding:1px 7px;white-space:nowrap}
.les .lk{color:var(--muted-2);font-size:13px}
.doc-lesson{aspect-ratio:auto;min-height:260px;display:grid;place-items:center;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:30px;text-align:center}
.notes-list{list-style:none;margin:10px 0 0;padding:0;display:flex;flex-direction:column;gap:8px}
.notes-list li{border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-size:14.5px;display:grid;grid-template-columns:auto 1fr;gap:10px}
.notes-list button{border:0;background:var(--green-soft);color:var(--green-ink);border-radius:6px;font-weight:800;cursor:pointer;padding:2px 8px;font-variant-numeric:tabular-nums}
.prot{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:10px;margin-top:12px}
.prot div{border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-size:14px}
.prot b{display:block;font-family:var(--f-head);color:var(--ink-2)}
.lvl td:first-child{white-space:nowrap}
@media (max-width:640px){
  .pv{padding:16px 16px 70px}.pv .ttl{font-size:17px}.pv .eq{display:none}.pv .ch{margin-bottom:4px}
  .ctrl{padding:18px 8px 6px;gap:4px}.crow{gap:2px}.crow button,.crow select{padding:4px 6px;font-size:13px}
  #pAuto{display:none}.bigplay{width:58px;height:58px}
  .chat-fab .fab-t{display:none}.chat-fab{padding:10px}
  .lbar .wrap{gap:10px}.lbar select{flex:1 1 140px}
}


/* ---------- Đăng nhập & chuyển dữ liệu ---------- */
.auth{display:grid;grid-template-columns:1fr 1fr;gap:28px;max-width:1000px;margin:0 auto;align-items:stretch}
.auth-side{background:var(--navy);color:#e5e7eb;border-radius:20px;padding:34px;display:flex;flex-direction:column;gap:14px}
.auth-side h1{color:#fff;font-size:clamp(24px,3vw,32px)}
.auth-side .ticks li{color:#e5e7eb}
.auth-box h3{font-size:20px}
.auth-box .alt{margin-top:14px;padding-top:14px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:8px}
.linkbtn{background:none;border:0;color:var(--green-ink);font-weight:800;cursor:pointer;padding:0;text-align:left;font-size:15px}
.who-card{border:1px solid var(--line);border-radius:12px;padding:12px 14px;display:grid;gap:4px;margin-bottom:14px;background:var(--surface-2)}
.err{color:var(--danger);font-weight:700;font-size:14px;margin:-6px 0 10px}
.code-in{letter-spacing:.5em;font-family:var(--f-head);font-weight:800;font-size:20px;text-align:center}
@media (max-width:820px){.auth{grid-template-columns:1fr}}
.mbars{display:flex;gap:8px;align-items:flex-end;height:120px;margin-top:10px}
.mbars div{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;font-size:12px;color:var(--muted-2);height:100%;justify-content:flex-end}
.mbars i{display:block;width:100%;background:linear-gradient(180deg,#14dd6a,#00a84a);border-radius:6px 6px 0 0}
.mbars b{color:var(--ink-2);font-family:var(--f-head);font-size:13px}
.cols.mig{grid-template-columns:minmax(0,2fr) minmax(0,.85fr)}
@media (max-width:900px){.cols.mig{grid-template-columns:1fr}}
.src{font-size:11px;font-weight:800;border-radius:6px;padding:1px 6px;background:var(--warn-soft);color:var(--warn);margin-left:6px;white-space:nowrap}


/* ---------- Thống kê, theo dõi, hỗ trợ ---------- */
:root{--c1:#2a78d6;--c2:#eb6834;--c3:#1baf7a;--c4:#eda100;--c5:#e87ba4}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){--c1:#3987e5;--c2:#d95926;--c3:#199e70;--c4:#c98500;--c5:#d55181}}
:root[data-theme="dark"]{--c1:#3987e5;--c2:#d95926;--c3:#199e70;--c4:#c98500;--c5:#d55181}
.cols.c17{grid-template-columns:1fr}.cols.c17>div:last-child{display:grid!important;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));align-items:start}.cols.c13{grid-template-columns:minmax(0,1fr) minmax(0,1.3fr)}
@media (max-width:900px){.cols.c17,.cols.c13{grid-template-columns:1fr}}
.kpi{min-width:0}.kpi b{overflow-wrap:anywhere}
@media (max-width:560px){.kpi b[style]{font-size:18px!important}}
.sgrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;margin-top:22px}
@media (max-width:900px){.sgrid{grid-template-columns:1fr}}
.chart-h{display:flex;justify-content:space-between;gap:10px;align-items:baseline;flex-wrap:wrap;margin-bottom:12px}
.chart-h h3{margin:0}
.legend{display:flex;gap:14px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.legend i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:6px;vertical-align:-1px}
.vbars{display:flex;align-items:flex-end;gap:10px;height:190px;border-bottom:1px solid var(--line);padding-top:18px}
.vbars .col{flex:1;display:flex;flex-direction:column;justify-content:flex-end;align-items:stretch;height:100%;position:relative;cursor:default;min-width:0}
.vbars .seg{display:block;border-radius:4px 4px 0 0}
.vbars .seg+.seg{border-radius:0;margin-top:0}
.vbars .seg.top{border-radius:4px 4px 0 0}
.vbars .gap{height:2px;background:var(--surface)}
.vbars .val{position:absolute;top:-18px;left:0;right:0;text-align:center;font-size:11.5px;font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums}
.xlab{display:flex;gap:10px;margin-top:6px}
.xlab span{flex:1;text-align:center;font-size:12px;color:var(--muted-2);min-width:0}
.hbars{display:flex;flex-direction:column;gap:10px}
.hb{display:grid;grid-template-columns:150px 1fr 110px;gap:10px;align-items:center;font-size:14px}
.hb .tr{height:12px;background:var(--surface-2);border-radius:0 4px 4px 0;overflow:hidden}
.hb .tr i{display:block;height:100%;border-radius:0 4px 4px 0}
.hb b{font-variant-numeric:tabular-nums;text-align:right;font-size:13.5px}
.hb span:first-child{display:flex;align-items:center;gap:8px;min-width:0}
.hb .dot{width:10px;height:10px;border-radius:3px;flex:none}
@media (max-width:560px){.hb{grid-template-columns:110px 1fr 80px}}
.lessonbars{display:flex;align-items:flex-end;gap:2px;height:140px;border-bottom:1px solid var(--line)}
.lessonbars i{flex:1;background:var(--c1);border-radius:3px 3px 0 0;display:block;min-width:2px}
.lessonbars i:hover,.vbars .col:hover .seg{filter:brightness(1.12)}
.tip{position:fixed;z-index:95;pointer-events:none;background:var(--navy);color:#fff;font-size:13px;padding:7px 10px;border-radius:8px;box-shadow:var(--shadow);max-width:260px;line-height:1.4;opacity:0;transition:opacity .12s}
.tip.on{opacity:1}
.flag{display:inline-block;font-size:11.5px;font-weight:800;border-radius:6px;padding:1px 7px;margin:2px 4px 0 0;white-space:nowrap}
.f-warn{background:var(--warn-soft);color:var(--warn)}.f-bad{background:var(--danger-soft);color:var(--danger)}.f-info{background:var(--info-soft);color:var(--blue-2)}.f-ok{background:var(--green-soft);color:var(--green-ink)}
.mini-pb{height:7px;background:var(--line);border-radius:9px;overflow:hidden;margin-top:4px;position:relative;width:120px}
.mini-pb i{display:block;height:100%;background:#00b84f;border-radius:9px}
.mini-pb em{position:absolute;top:-2px;bottom:-2px;width:2px;background:var(--ink-2);opacity:.5}
.switch{position:relative;display:inline-block;width:38px;height:22px}
.switch input{opacity:0;width:0;height:0}
.switch span{position:absolute;inset:0;background:var(--line);border-radius:999px;cursor:pointer;transition:.2s}
.switch span::before{content:"";position:absolute;width:16px;height:16px;left:3px;top:3px;background:#fff;border-radius:50%;transition:.2s}
.switch input:checked+span{background:#00b84f}
.switch input:checked+span::before{transform:translateX(16px)}
.switch input:focus-visible+span{outline:3px solid var(--green);outline-offset:2px}
.modal{position:fixed;inset:0;z-index:85;background:rgba(10,15,25,.6);display:grid;place-items:center;padding:16px;overflow:auto}
.modal .panel{width:min(680px,100%);max-height:calc(100vh - 32px);overflow:auto;box-shadow:var(--shadow)}
.qnum{display:inline-grid;place-items:center;width:24px;height:24px;border-radius:50%;background:var(--green-soft);color:var(--green-ink);font-weight:800;font-size:13px;margin-right:8px;font-family:var(--f-head)}
.qblock{border-top:1px solid var(--line);padding-top:16px;margin-top:6px}
.qblock h4{font-size:16px;margin-bottom:10px;display:flex;align-items:center}
.chips-pick{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
.chips-pick label{border:1.5px solid var(--line);border-radius:999px;padding:6px 12px;cursor:pointer;font-weight:700;font-size:14px}
.chips-pick label:has(input:checked){border-color:#00b84f;background:var(--green-soft);color:var(--green-ink)}
.chips-pick input{position:absolute;opacity:0;pointer-events:none}
.thread{display:flex;flex-direction:column;gap:10px;max-height:420px;overflow:auto;padding:4px}
.bubble{max-width:88%;padding:10px 13px;border-radius:14px;font-size:14.5px;line-height:1.5;white-space:pre-line}
.bubble.u{align-self:flex-end;background:#00b84f;color:#fff;border-bottom-right-radius:4px}
.bubble.a{align-self:flex-start;background:var(--surface-2);border:1px solid var(--line);border-bottom-left-radius:4px}
.bubble.s{align-self:flex-start;background:var(--info-soft);border:1px solid color-mix(in srgb,var(--blue) 40%,transparent);border-bottom-left-radius:4px}
.bubble small{display:block;font-size:11.5px;opacity:.75;margin-bottom:3px;font-weight:700}
.rate{display:flex;gap:6px;margin-top:6px}
.rate button{border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:3px 10px;cursor:pointer;font-size:12.5px;font-weight:700;color:var(--ink)}
.tk{border:1px solid var(--line);border-radius:12px;padding:10px 12px;cursor:pointer;display:grid;gap:4px;background:var(--surface)}
.tk.on{border-color:#00b84f;box-shadow:0 0 0 3px var(--green-soft)}
.tk .q{font-size:14px;color:var(--ink)}
.tk small{color:var(--muted-2)}
.zfeed{background:#eef3fb;border-radius:14px;padding:14px;display:flex;flex-direction:column;gap:10px;max-height:380px;overflow:auto}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]) .zfeed{background:#0f1b2d}}
:root[data-theme="dark"] .zfeed{background:#0f1b2d}
.zmsg{background:var(--surface);border-radius:12px;padding:10px 12px;font-size:14px;white-space:pre-line;box-shadow:var(--shadow-sm)}
.zmsg b{display:block;font-size:12.5px;color:#0068ff;margin-bottom:3px}
.zmsg small{display:block;color:var(--muted-2);font-size:11.5px;margin-top:4px}
.flash{display:flex;flex-wrap:wrap;gap:8px 14px;align-items:center;justify-content:space-between;border-radius:12px;padding:12px 16px;background:var(--navy);color:#fff;margin-bottom:20px}
.flash b{font-family:var(--f-head)}
.flash .tm{background:#00d45b;color:#06210f;border-radius:8px;padding:3px 9px;font-weight:800;font-variant-numeric:tabular-nums}
.tcard .who-src{font-size:12px;color:#6b7280}


/* ---------- Khóa học, nội dung bài, nhập từ Claude ---------- */
.tbl-wrap{position:relative}
@media (max-width:480px){.btn{white-space:normal;text-align:center}}
.pin{width:100%;min-width:118px;border:1.5px solid var(--line);border-radius:8px;padding:6px 8px;background:var(--surface);font-variant-numeric:tabular-nums}
.pin:disabled{opacity:.4}
#crRows select{border:1.5px solid var(--line);border-radius:8px;padding:6px 8px;background:var(--surface)}
.les-row{display:grid;grid-template-columns:28px minmax(0,1fr) auto;gap:8px;align-items:center;padding:6px 0;border-top:1px dashed var(--line);font-size:14px}
.les-row .act{flex-wrap:nowrap}
.lesson-doc{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:26px 28px;font-size:16px;line-height:1.7}
.lesson-doc h2{font-size:clamp(20px,2.6vw,26px);margin:4px 0 12px}
.lesson-doc h3{font-size:18px;margin:18px 0 6px}
.lesson-doc p{margin:0 0 10px}
.lesson-doc ul{margin:0 0 10px;padding-left:22px}
.lesson-doc code{background:var(--surface-2);border-radius:5px;padding:1px 5px;font-size:.92em}
.lesson-doc pre,.prompt pre{background:#0b1220;color:#e2f5e9;border-radius:10px;padding:14px 16px;overflow-x:auto;white-space:pre-wrap;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13.5px;line-height:1.55;margin:0 0 12px}
.prompt{position:relative}
.prompt button{position:absolute;top:8px;right:8px;background:#1f2937;color:#e5e7eb;border-color:#334155}
.demo-wrap{background:#0b1220;border-radius:14px;overflow:hidden;display:flex;flex-direction:column}
.demo-wrap .dbar{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:8px 12px;color:#e5e7eb;font-size:13px}
.demo-wrap iframe{width:100%;height:520px;border:0;background:#fff;display:block}
.demo-wrap:fullscreen iframe{height:calc(100vh - 44px)}
.qz{border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin:0 0 10px}
.qz legend{font-weight:700;font-family:var(--f-head);padding:0 4px}
.qopt{display:flex;gap:8px;align-items:center;padding:6px 8px;border-radius:8px;cursor:pointer}
.qopt input{accent-color:#00b84f}
.qopt.right{background:var(--green-soft);color:var(--green-ink);font-weight:700}
.qopt.wrong{background:var(--danger-soft);color:var(--danger)}
.ptable td,.ptable th{padding:10px 12px}
.c-price{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap;font-family:var(--f-head)}
.c-price b{font-size:20px;color:var(--ink-2)}
.c-price s{color:var(--muted-2);font-size:14px}
.c-price .free{color:var(--green-ink);font-size:18px;font-weight:800}
.stepcard{display:grid;grid-template-columns:30px 1fr;gap:10px;font-size:14.5px;color:var(--muted)}
.stepcard b{color:var(--ink-2)}
.stepcard i{width:26px;height:26px;border-radius:50%;background:var(--green-soft);color:var(--green-ink);display:grid;place-items:center;font-style:normal;font-weight:800;font-family:var(--f-head)}

/* ---------- Phiếu giao việc: hướng dẫn, ảnh, trợ lý ---------- */
.day-guide{padding:18px 20px;font-size:15.5px}
.fig{margin:10px 0 14px;display:grid;gap:6px}
.fig img{max-width:100%;border-radius:10px;border:1px solid var(--line);background:#fff}
.fig figcaption{font-size:13px;color:var(--muted-2);text-align:center}
.gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:10px}
.ph{border:2px dashed var(--warn);border-radius:10px;padding:12px;font-size:13.5px;color:var(--warn);background:var(--warn-soft);display:grid;gap:4px}
.taskw{border-top:1px solid var(--line)}
.taskw .task{border-top:0}
.tguide{margin:0 0 10px 36px}
.tguide summary{cursor:pointer;font-weight:700;font-size:13.5px;color:var(--green-ink);width:max-content}
.tguide .lesson-doc{padding:12px 14px;margin-top:8px;font-size:14.5px}
.agent-box{border:1px solid var(--line);border-radius:14px;background:var(--surface-2);padding:14px;display:grid;gap:10px;margin-top:6px}
.agent-h{display:grid;grid-template-columns:36px 1fr;gap:10px;align-items:center}
.agent-h .av{width:36px;height:36px;border-radius:50%;background:linear-gradient(140deg,#14dd6a,#047857);color:#fff;display:grid;place-items:center;font-weight:800;font-family:var(--f-head);font-size:13px}
.agent-h b{display:block;font-family:var(--f-head)}
.agent-h small{color:var(--muted-2);font-size:12.5px}
.agent-box .thread{max-height:300px}
.agent-f{display:flex;gap:8px;flex-wrap:wrap}
.agent-f input{flex:1 1 220px;min-width:0;border:1.5px solid var(--line);border-radius:999px;padding:10px 14px;background:var(--surface)}
.imgedit{border:1px solid var(--line);border-radius:10px;padding:8px;display:grid;gap:6px}
.imgedit img{width:100%;height:90px;object-fit:cover;border-radius:6px}
.imgedit input{border:1.5px solid var(--line);border-radius:6px;padding:5px 8px;background:var(--surface);min-width:0}
#dfTasks .kb-i input,#dfTasks .kb-i textarea{border:1.5px solid var(--line);border-radius:8px;padding:7px 9px;background:var(--surface);width:100%;min-width:0}
.fdone{background:var(--green-soft);border-radius:16px;padding:22px;display:grid;gap:8px}

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

/* ---------- Trình phát YouTube (giai đoạn chuyển) ---------- */
.player.ytm{aspect-ratio:auto;display:flex;flex-direction:column;background:#000}
.player.ytm .ytbox{position:relative;aspect-ratio:16/9;width:100%;background:#000}
.player.ytm .ytbox iframe,.player.ytm .ytbox #ytp{position:absolute;inset:0;width:100%;height:100%;border:0}
.player.ytm .ytload{position:absolute;inset:0;display:grid;place-items:center;color:#9ca3af;font-size:14px;padding:20px;text-align:center}
.player.ytm .ctrl{position:static;background:#0b1220;padding:10px 14px 8px;opacity:1!important}
.player.ytm:fullscreen .ytbox{flex:1;aspect-ratio:auto}
.player.ytm .ywho{font-size:12px;color:#7ee2a8;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:40%}
.player.ytm .nextcard{z-index:7}
@media (max-width:600px){.player.ytm .ctrl{padding:8px 8px 6px}.player.ytm .ywho{display:none}}