/* =========================================================
   MOMD Group — Design System
   Brand: red→orange gradient + carbon black, circuit-board motif
   ========================================================= */

:root{
  /* brand */
  --red-500:#E32428;
  --red-600:#C41E22;
  --red-400:#FF3B3F;
  --orange-500:#FF6B35;
  --grad-brand:linear-gradient(135deg,#E32428 0%,#FF6B35 100%);
  --grad-brand-soft:linear-gradient(135deg,rgba(227,36,40,.10) 0%,rgba(255,107,53,.10) 100%);
  --grad-brand-glow:radial-gradient(60% 60% at 30% 30%,rgba(255,107,53,.45),transparent 70%);
  /* neutrals */
  --ink-900:#0E0E10;
  --ink-800:#1A1A1D;
  --ink-700:#2A2A2E;
  --ink-500:#4A4A52;
  --ink-400:#6B6B74;
  --ink-300:#A0A0AA;
  --ink-200:#D9D9DE;
  --ink-100:#EFEFF2;
  --ink-50:#F7F7F9;
  --white:#FFFFFF;
  /* surface */
  --bg:#FFFFFF;
  --surf:#F7F7F9;
  --surf-2:#EFEFF2;
  --surf-dark:#0E0E10;
  --line:rgba(14,14,16,.08);
  --line-strong:rgba(14,14,16,.16);
  /* type */
  --ff-display:"Space Grotesk","Inter",system-ui,sans-serif;
  --ff-body:"Inter",system-ui,sans-serif;
  --ff-mono:"JetBrains Mono",ui-monospace,monospace;
  /* size */
  --r-xs:6px; --r-sm:10px; --r-md:14px; --r-lg:20px; --r-xl:28px; --r-2xl:36px; --r-pill:999px;
  --shadow-sm:0 2px 8px rgba(14,14,16,.06);
  --shadow-md:0 8px 24px rgba(14,14,16,.10);
  --shadow-lg:0 24px 60px rgba(14,14,16,.18);
  --shadow-glow:0 20px 50px rgba(227,36,40,.25);
  --container:1240px;
  --header-h:80px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --ease-out:cubic-bezier(.16,1,.3,1);
}

/* reset */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--ff-body);color:var(--ink-900);background:var(--bg);
  font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,svg,video{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--red-500)}
button{font:inherit;cursor:pointer;border:0;background:transparent;color:inherit}
input,textarea,select{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5{font-family:var(--ff-display);font-weight:600;line-height:1.15;letter-spacing:-.01em;margin:0 0 .5em}
h1{font-size:clamp(2.4rem,5vw,4.2rem);letter-spacing:-.025em;font-weight:700}
h2{font-size:clamp(1.9rem,3.5vw,2.8rem);letter-spacing:-.02em}
h3{font-size:clamp(1.3rem,2vw,1.6rem)}
h4{font-size:1.1rem}
p{margin:0 0 1em}
.muted{color:var(--ink-400)}
.mono{font-family:var(--ff-mono);letter-spacing:-.02em}
.skip{position:absolute;left:-9999px}.skip:focus{left:1rem;top:1rem;background:#000;color:#fff;padding:.5rem 1rem;z-index:1000}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
@media(max-width:640px){.container{padding:0 16px}}

/* =====================  HEADER  ===================== */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.7);
  backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid transparent;
  transition:background .35s var(--ease),border-color .35s var(--ease),box-shadow .35s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.92);
  border-bottom-color:var(--line);
  box-shadow:0 4px 20px rgba(14,14,16,.06);
}
.header-inner{
  display:flex;align-items:center;gap:32px;height:var(--header-h);
}
.brand{display:inline-flex;align-items:center;flex:0 0 auto}
.momd-logo{height:38px;width:auto;transition:transform .3s var(--ease)}
.brand:hover .momd-logo{transform:scale(1.04)}
.site-header.is-scrolled .momd-logo{height:34px}

.nav-primary{flex:1;display:flex;justify-content:center}
.nav-primary > ul{display:flex;gap:2px;align-items:center}
.nav-primary li{position:relative}
.nav-primary > ul{flex-wrap:nowrap}
.nav-primary > ul > li{flex:0 0 auto}
.nav-primary > ul > li > a{
  display:inline-flex;align-items:center;gap:6px;
  padding:10px 12px;border-radius:var(--r-pill);
  font-weight:500;font-size:.92rem;color:var(--ink-700);
  white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease);
}
@media(max-width:1180px){
  .nav-primary > ul > li > a{padding:10px 9px;font-size:.88rem}
  .header-cta .btn--ghost{display:none}
}
.nav-primary > ul > li > a:hover{background:var(--surf-2);color:var(--ink-900)}
.nav-primary li.has-mega > a::after{
  content:"";display:inline-block;width:8px;height:8px;
  border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;
  transform:rotate(45deg) translateY(-2px);margin-left:2px;opacity:.6;
}

/* mega menu — neo theo full width của header để không bị xuống dòng */
.nav-primary li.has-mega{position:static}
.mega{
  position:absolute;top:100%;left:0;right:0;
  width:min(1100px,calc(100% - 48px));margin:0 auto;
  transform:translateY(-6px);
  background:var(--white);border:1px solid var(--line);
  border-radius:var(--r-lg);box-shadow:var(--shadow-lg);
  padding:18px;
  opacity:0;pointer-events:none;visibility:hidden;
  transition:opacity .2s var(--ease),transform .25s var(--ease),visibility .2s;
  z-index:10;
}
/* invisible bridge — chuột đi từ link xuống mega không bị rớt. Bridge phải pointer-events:auto luôn */
.mega::before{content:"";position:absolute;left:0;right:0;top:-14px;height:14px;pointer-events:auto}
/* Mở mega khi JS gắn .is-open hoặc khi focus-within để keyboard nav vẫn hoạt động */
.has-mega.is-open > .mega,
.has-mega:focus-within > .mega{
  opacity:1;visibility:visible;pointer-events:auto;
  transform:translateY(0);
}
.mega-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:6px}
.mega-grid--2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.mega-item{min-width:0}
.mega-item strong,.mega-item em{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:block;max-width:100%}
.mega-item{
  display:flex;gap:12px;align-items:flex-start;
  padding:12px;border-radius:var(--r-md);
  transition:background .2s var(--ease);
}
.mega-item:hover{background:var(--surf)}
.mega-item:hover{color:inherit}
.mega-item strong{display:block;color:var(--ink-900);font-weight:600;font-size:.95rem;margin-bottom:2px}
.mega-item em{display:block;color:var(--ink-400);font-style:normal;font-size:.82rem}
.mega-ico{
  flex:0 0 40px;height:40px;border-radius:var(--r-sm);
  display:grid;place-items:center;
  background:var(--grad-brand-soft);color:var(--red-500);
}
.mega-ico.ai{background:linear-gradient(135deg,#1A1A1D,#3A3A40);color:#fff}

.header-cta{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.hamb{display:none;width:42px;height:42px;border-radius:var(--r-md);flex-direction:column;justify-content:center;align-items:center;gap:5px;background:var(--surf-2)}
.hamb span{display:block;width:18px;height:2px;background:var(--ink-900);border-radius:2px;transition:transform .25s var(--ease),opacity .2s}
body.menu-open .hamb span:nth-child(1){transform:translateY(7px) rotate(45deg)}
body.menu-open .hamb span:nth-child(2){opacity:0}
body.menu-open .hamb span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

@media(max-width:1024px){
  .nav-primary{
    position:fixed;top:var(--header-h);left:0;right:0;bottom:0;
    background:rgba(255,255,255,.98);backdrop-filter:blur(14px);
    flex-direction:column;justify-content:flex-start;padding:24px;
    transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:transform .3s var(--ease),opacity .3s;
  }
  body.menu-open .nav-primary{transform:none;opacity:1;pointer-events:auto}
  .nav-primary > ul{flex-direction:column;width:100%;gap:4px}
  .nav-primary > ul > li{width:100%}
  .nav-primary > ul > li > a{width:100%;font-size:1.05rem;padding:14px}
  .mega{position:static;width:auto;margin:0;transform:none;opacity:1;visibility:visible;pointer-events:auto;box-shadow:none;border:0;background:transparent;padding:6px 0 12px}
  .mega::before{display:none}
  .mega-grid,.mega-grid--2{grid-template-columns:1fr}
  .hamb{display:flex}
  .header-cta .btn--ghost{display:none}
}

/* =====================  BUTTONS / BADGE  ===================== */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 20px;border-radius:var(--r-pill);
  font-weight:600;font-size:.94rem;line-height:1;
  transition:transform .2s var(--ease),box-shadow .25s var(--ease),background .2s,color .2s;
  white-space:nowrap;
}
.btn .ico{transition:transform .25s var(--ease)}
.btn:hover .ico{transform:translateX(2px)}
.btn--primary{background:var(--grad-brand);color:#fff;box-shadow:0 8px 24px rgba(227,36,40,.32)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 14px 32px rgba(227,36,40,.42);color:#fff}
.btn--dark{background:var(--ink-900);color:#fff}
.btn--dark:hover{background:#000;color:#fff;transform:translateY(-2px)}
.btn--ghost{background:var(--surf-2);color:var(--ink-900)}
.btn--ghost:hover{background:var(--ink-100)}
.btn--outline{background:transparent;color:var(--ink-900);box-shadow:inset 0 0 0 1.5px var(--ink-900)}
.btn--outline:hover{background:var(--ink-900);color:#fff}
.btn--lg{padding:14px 26px;font-size:1rem}
.btn--block{width:100%;justify-content:center}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--ff-mono);font-size:.72rem;font-weight:500;
  text-transform:uppercase;letter-spacing:.08em;
  padding:4px 10px;border-radius:var(--r-pill);
  background:var(--surf-2);color:var(--ink-700);
}
.tag--brand{background:var(--grad-brand-soft);color:var(--red-500)}
.tag--dark{background:var(--ink-900);color:#fff}
.tag--ai{background:linear-gradient(135deg,#1A1A1D,#3A3A40);color:#FF6B35}
.tag--ai::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--orange-500);box-shadow:0 0 0 4px rgba(255,107,53,.2);animation:pulse 2s var(--ease) infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 4px rgba(255,107,53,.2)}50%{box-shadow:0 0 0 8px rgba(255,107,53,0)}}

.badge{display:inline-flex;align-items:center;gap:6px;font-size:.78rem;color:var(--ink-400);padding:5px 10px;border-radius:var(--r-pill);background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1)}

/* =====================  HERO  ===================== */
.hero{
  position:relative;overflow:hidden;
  padding:calc(var(--header-h) + 40px) 0 80px;
  background:radial-gradient(80% 80% at 70% 0%,rgba(255,107,53,.12),transparent 60%),
             radial-gradient(60% 60% at 10% 100%,rgba(227,36,40,.08),transparent 60%),
             #FAFAFC;
}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:64px;align-items:center;position:relative;z-index:2}
@media(max-width:1024px){.hero-grid{grid-template-columns:1fr;gap:40px}}
.hero h1{margin-bottom:24px}
.hero h1 .grad{
  background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent;
  background-size:200% 200%;animation:gradShift 6s ease-in-out infinite;
}
@keyframes gradShift{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}
.hero p.lead{font-size:1.18rem;color:var(--ink-500);max-width:560px;margin-bottom:32px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:36px}
.hero-trust{display:flex;gap:32px;flex-wrap:wrap;align-items:center}
.hero-trust .item{display:flex;align-items:center;gap:10px}
.hero-trust .num{font-family:var(--ff-display);font-weight:700;font-size:1.5rem;background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-trust .lbl{font-size:.82rem;color:var(--ink-400);line-height:1.3}

/* Hero visual: circuit + floating cards */
.hero-visual{position:relative;aspect-ratio:1/1;max-width:560px;justify-self:center;width:100%}
.circuit-svg{position:absolute;inset:0;width:100%;height:100%;z-index:1}
.circuit-svg .grid line{stroke:rgba(14,14,16,.06)}
.circuit-svg .trace{fill:none;stroke:url(#momdGrad);stroke-width:2;stroke-linecap:round;filter:drop-shadow(0 0 8px rgba(255,107,53,.4))}
.circuit-svg .node{fill:#fff;stroke:url(#momdGrad);stroke-width:2}
.circuit-svg .node.pulse{animation:nodePulse 2.4s var(--ease) infinite}
@keyframes nodePulse{0%,100%{r:4;filter:none}50%{r:6;filter:drop-shadow(0 0 8px var(--orange-500))}}

.hero-orb{
  position:absolute;inset:8% 8%;border-radius:50%;
  background:var(--grad-brand);
  filter:blur(0);box-shadow:0 40px 100px rgba(227,36,40,.35),inset 0 -30px 60px rgba(0,0,0,.18);
  z-index:2;display:grid;place-items:center;
  animation:float 6s ease-in-out infinite;
}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
.hero-orb::before{
  content:"";position:absolute;inset:0;border-radius:50%;
  background:radial-gradient(circle at 30% 30%,rgba(255,255,255,.4),transparent 50%);
  mix-blend-mode:overlay;
}
.hero-orb svg{width:55%;height:auto;color:#fff;filter:drop-shadow(0 8px 16px rgba(0,0,0,.25))}

.hero-card{
  position:absolute;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-md);padding:14px 16px;box-shadow:var(--shadow-md);
  display:flex;align-items:center;gap:12px;z-index:3;font-size:.86rem;
}
.hero-card .ico-wrap{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;background:var(--grad-brand-soft);color:var(--red-500);flex:0 0 36px}
.hero-card strong{display:block;font-weight:600}
.hero-card em{font-style:normal;color:var(--ink-400);font-size:.78rem}
.hero-card.c1{top:6%;left:-4%;animation:floatA 7s ease-in-out infinite}
.hero-card.c2{bottom:14%;right:-6%;animation:floatB 8s ease-in-out infinite .5s}
.hero-card.c3{bottom:-2%;left:8%;animation:floatA 6.5s ease-in-out infinite 1s}
@keyframes floatA{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
@keyframes floatB{0%,100%{transform:translateY(0)}50%{transform:translateY(12px)}}

/* Particle layer */
.hero-particles{position:absolute;inset:0;pointer-events:none;z-index:1}

/* =====================  SECTIONS  ===================== */
.sec{padding:96px 0;position:relative}
.sec--tight{padding:72px 0}
.sec--dark{background:var(--ink-900);color:#fff}
.sec--dark h1,.sec--dark h2,.sec--dark h3,.sec--dark h4{color:#fff}
.sec--dark .muted{color:var(--ink-300)}
.sec--gradient{background:linear-gradient(180deg,#fff,#FAFAFC)}
.sec-head{text-align:center;max-width:760px;margin:0 auto 56px}
.sec-head .tag{margin-bottom:14px}
.sec-head p{font-size:1.06rem;color:var(--ink-500)}
.sec-head--left{text-align:left;margin-left:0}

/* Marquee logos / engines */
.engines{padding:48px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}
.engines-inner{display:flex;align-items:center;gap:28px;flex-wrap:wrap;justify-content:space-between}
.engines-label{font-family:var(--ff-mono);font-size:.78rem;text-transform:uppercase;color:var(--ink-400);letter-spacing:.08em}
.engines-list{display:flex;gap:36px;flex-wrap:wrap;align-items:center}
.engines-list .e{font-family:var(--ff-display);font-weight:600;color:var(--ink-700);opacity:.65;display:flex;align-items:center;gap:8px;transition:opacity .2s,color .2s}
.engines-list .e:hover{opacity:1;color:var(--ink-900)}
.engines-list .e .dot{width:8px;height:8px;border-radius:50%;background:var(--grad-brand)}

/* =====================  STATS COUNTER  ===================== */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
@media(max-width:768px){.stats{grid-template-columns:repeat(2,1fr)}}
.stat{
  position:relative;padding:32px 24px;border-radius:var(--r-lg);
  background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);
  overflow:hidden;
}
.sec:not(.sec--dark) .stat{background:#fff;border-color:var(--line);box-shadow:var(--shadow-sm)}
.stat::before{
  content:"";position:absolute;top:0;left:0;width:60px;height:3px;background:var(--grad-brand);
  border-radius:0 0 4px 0;
}
.stat .num{font-family:var(--ff-display);font-weight:700;font-size:clamp(2.2rem,4vw,3rem);letter-spacing:-.025em;line-height:1;display:flex;align-items:baseline;gap:4px}
.stat .num .suf{font-size:.6em;color:var(--orange-500)}
.stat .lbl{margin-top:8px;color:var(--ink-400);font-size:.92rem}
.sec:not(.sec--dark) .stat .lbl{color:var(--ink-500)}

/* =====================  SERVICE CARDS  ===================== */
.svc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
@media(max-width:1024px){.svc-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.svc-grid{grid-template-columns:1fr}}
.svc-card{
  position:relative;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-lg);padding:28px 24px;
  transition:transform .35s var(--ease-out),box-shadow .35s var(--ease-out),border-color .35s;
  overflow:hidden;
}
.svc-card::before{
  content:"";position:absolute;inset:0;border-radius:var(--r-lg);padding:1.5px;
  background:var(--grad-brand);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;
  opacity:0;transition:opacity .35s;
}
.svc-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:transparent}
.svc-card:hover::before{opacity:1}
.svc-ico{
  width:54px;height:54px;border-radius:var(--r-md);
  display:grid;place-items:center;
  background:var(--grad-brand);color:#fff;
  margin-bottom:18px;box-shadow:0 12px 24px rgba(227,36,40,.25);
}
.svc-card h3{margin-bottom:6px;font-size:1.18rem}
.svc-card .tagline{color:var(--ink-400);font-size:.88rem;margin-bottom:14px}
.svc-card ul{margin-bottom:18px}
.svc-card ul li{position:relative;padding-left:22px;font-size:.9rem;color:var(--ink-700);margin-bottom:6px}
.svc-card ul li::before{
  content:"";position:absolute;left:0;top:.5em;width:14px;height:8px;
  border-left:2px solid var(--red-500);border-bottom:2px solid var(--red-500);
  transform:rotate(-45deg);
}
.svc-price{display:flex;align-items:baseline;gap:6px;margin-top:12px;padding-top:16px;border-top:1px dashed var(--line)}
.svc-price .lbl{font-size:.78rem;color:var(--ink-400)}
.svc-price .v{font-family:var(--ff-display);font-weight:700;font-size:1.2rem;color:var(--red-500)}

/* =====================  PROCESS  ===================== */
.process{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative}
@media(max-width:1024px){.process{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.process{grid-template-columns:1fr}}
.process .step{padding:28px;border-right:1px solid var(--line);position:relative}
.process .step:last-child{border-right:0}
.process .num{font-family:var(--ff-mono);font-size:.78rem;color:var(--orange-500);font-weight:600;letter-spacing:.1em;margin-bottom:10px}
.process .step h4{font-size:1.1rem;margin-bottom:6px}
.process .step p{color:var(--ink-500);font-size:.92rem;margin:0}
.process .step::before{
  content:"";position:absolute;top:28px;right:-4px;width:8px;height:8px;border-radius:50%;
  background:var(--grad-brand);box-shadow:0 0 0 4px #fff;
}
.process .step:last-child::before{display:none}

/* =====================  COURSE CARDS  ===================== */
.course-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
@media(max-width:768px){.course-grid{grid-template-columns:1fr}}
.course-card{
  position:relative;border:1px solid var(--line);border-radius:var(--r-xl);
  background:#fff;overflow:hidden;
  transition:transform .45s var(--ease-out),box-shadow .45s var(--ease-out),border-color .3s;
  display:flex;flex-direction:column;
}
.course-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:transparent}
.course-thumb{
  position:relative;aspect-ratio:16/9;overflow:hidden;
  background:linear-gradient(135deg,#1A1A1D 0%,#2A1015 60%,#3D1A0F 100%);
  display:block;color:#fff;
}
.course-thumb img.course-thumb-img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:1;
  transition:transform .6s var(--ease-out);
}
.course-card:hover .course-thumb-img{transform:scale(1.06)}
.course-thumb img.course-thumb-img + .scene{opacity:0}
.course-thumb:has(img.course-thumb-img)::after{
  background:linear-gradient(180deg,rgba(0,0,0,0) 0%,rgba(0,0,0,.55) 70%,rgba(0,0,0,.85) 100%);
  mix-blend-mode:normal;
}
.course-thumb .scene{position:absolute;inset:0;width:100%;height:100%}
.course-thumb::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(70% 60% at 80% 100%,rgba(255,107,53,.45),transparent 60%),
             radial-gradient(60% 50% at 10% 0%,rgba(227,36,40,.35),transparent 60%);
  mix-blend-mode:screen;pointer-events:none;
}
.course-thumb .ttl{
  position:absolute;left:20px;right:20px;top:50%;transform:translateY(-50%);
  z-index:2;color:#fff;text-align:left;
}
.course-thumb .ttl .kicker{
  font-family:var(--ff-mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--orange-500);margin-bottom:6px;display:flex;align-items:center;gap:6px;
}
.course-thumb .ttl .kicker::before{content:"";width:18px;height:1.5px;background:var(--orange-500)}
.course-thumb .ttl h4{
  font-family:var(--ff-display);font-size:clamp(1.35rem,2.4vw,1.7rem);
  font-weight:700;line-height:1.15;color:#fff;margin:0;
  text-shadow:0 4px 24px rgba(0,0,0,.4);
}
.course-thumb .play{
  position:absolute;right:20px;bottom:20px;width:54px;height:54px;border-radius:50%;
  background:rgba(255,255,255,.95);color:var(--red-500);display:grid;place-items:center;
  box-shadow:0 16px 36px rgba(0,0,0,.45);transition:transform .3s var(--ease),background .3s;
  z-index:3;
}
.course-card:hover .play{transform:scale(1.1) rotate(8deg)}
.course-thumb .level{position:absolute;top:14px;left:14px;z-index:3;backdrop-filter:blur(8px);background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.18);color:#fff}
.course-thumb .level::before{background:var(--orange-500)}
.course-thumb .duration{position:absolute;bottom:18px;left:20px;background:rgba(0,0,0,.55);color:#fff;font-family:var(--ff-mono);font-size:.76rem;padding:5px 11px;border-radius:var(--r-pill);backdrop-filter:blur(8px);z-index:3;display:inline-flex;align-items:center;gap:6px}
.course-thumb .discount{
  position:absolute;top:14px;right:14px;z-index:3;
  background:#fff;color:var(--red-500);
  font-family:var(--ff-display);font-weight:700;font-size:.86rem;
  padding:6px 12px;border-radius:var(--r-pill);
  box-shadow:0 8px 22px rgba(0,0,0,.35);
  display:inline-flex;align-items:center;gap:5px;
  transform:rotate(3deg);
}
.course-thumb .discount::before{content:"%";color:var(--orange-500);font-size:.9em}

.course-body{padding:24px;display:flex;flex-direction:column;flex:1}
.course-body h3{margin-bottom:8px;font-size:1.18rem;line-height:1.3}
.course-body h3 a{color:var(--ink-900);transition:color .2s}
.course-body h3 a:hover{color:var(--red-500)}
.course-body p.cdesc{color:var(--ink-500);font-size:.92rem;margin-bottom:18px;line-height:1.55}
.course-meta{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:16px}
.course-meta .m{
  display:inline-flex;align-items:center;gap:5px;font-size:.78rem;
  background:var(--surf);color:var(--ink-700);
  padding:5px 10px;border-radius:var(--r-pill);
  font-weight:500;
}
.course-meta .m .ico{color:var(--red-500)}

.course-instructor{
  display:flex;align-items:center;gap:10px;margin-bottom:18px;
  padding:10px 12px;background:var(--surf);border-radius:var(--r-md);
}
.course-instructor .ava{
  width:32px;height:32px;border-radius:50%;background:var(--grad-brand);
  display:grid;place-items:center;color:#fff;font-weight:700;font-size:.78rem;
  font-family:var(--ff-display);flex:0 0 32px;
}
.course-instructor .info{flex:1;min-width:0;line-height:1.2}
.course-instructor .info strong{display:block;font-size:.84rem;color:var(--ink-900)}
.course-instructor .info span{display:block;font-size:.72rem;color:var(--ink-400)}
.course-instructor .rating{
  display:inline-flex;align-items:center;gap:3px;font-weight:700;font-size:.84rem;
  color:var(--ink-900);
}
.course-instructor .rating .ico{color:var(--orange-500)}
.course-instructor .rating em{font-style:normal;color:var(--ink-400);font-weight:500;font-size:.72rem;margin-left:2px}

.course-perks{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:18px}
.course-perks .p{
  display:inline-flex;align-items:center;gap:4px;font-size:.74rem;
  color:var(--ink-500);padding:4px 8px;border:1px dashed var(--line-strong);
  border-radius:var(--r-pill);
}
.course-perks .p .ico{color:var(--red-500)}

.course-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:18px;border-top:1px solid var(--line)}
.course-price{display:flex;flex-direction:column;line-height:1.1}
.course-price .now{font-family:var(--ff-display);font-weight:700;font-size:1.5rem;background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent}
.course-price .old{font-size:.84rem;color:var(--ink-300);text-decoration:line-through;margin-top:2px}
.course-rating{display:inline-flex;align-items:center;gap:4px;color:var(--orange-500);font-weight:600;font-size:.9rem}
.course-foot .btn{flex:0 0 auto}

/* Roadmap */
.roadmap{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;position:relative}
@media(max-width:768px){.roadmap{grid-template-columns:1fr}}
.roadmap .lvl{
  position:relative;padding:28px;border-radius:var(--r-xl);
  background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);
  overflow:hidden;
}
.roadmap .lvl::before{content:"";position:absolute;inset:0;background:var(--grad-brand-glow);opacity:.5;pointer-events:none}
.roadmap .lvl > *{position:relative;z-index:1}
.roadmap .num{font-family:var(--ff-mono);font-size:.78rem;color:var(--orange-500);letter-spacing:.1em;margin-bottom:10px}
.roadmap h3{margin-bottom:12px}
.roadmap ul li{padding-left:20px;position:relative;color:var(--ink-300);margin-bottom:6px;font-size:.92rem}
.roadmap ul li::before{content:"›";position:absolute;left:0;color:var(--orange-500);font-weight:700}

/* =====================  TESTIMONIALS  ===================== */
.testi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:1024px){.testi-grid{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.testi-grid{grid-template-columns:1fr}}
.testi{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px 24px;position:relative;
  transition:transform .3s var(--ease),box-shadow .3s;
}
.testi:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.testi .stars{color:var(--orange-500);margin-bottom:12px;display:flex;gap:2px}
.testi blockquote{margin:0 0 18px;font-size:1rem;line-height:1.6;color:var(--ink-700)}
.testi .who{display:flex;align-items:center;gap:12px}
.testi .ava{width:44px;height:44px;border-radius:50%;background:var(--grad-brand);display:grid;place-items:center;color:#fff;font-weight:700;font-family:var(--ff-display)}
.testi .who strong{display:block;font-size:.92rem}
.testi .who span{display:block;font-size:.8rem;color:var(--ink-400)}

/* =====================  CTA BLOCK  ===================== */
.cta-banner{
  position:relative;border-radius:var(--r-2xl);
  background:var(--grad-brand);color:#fff;
  padding:64px 56px;overflow:hidden;
  display:grid;grid-template-columns:1.5fr 1fr;gap:40px;align-items:center;
}
.cta-banner::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(60% 80% at 100% 0%,rgba(255,255,255,.25),transparent 60%);
}
.cta-banner > *{position:relative;z-index:1}
.cta-banner h2{color:#fff;margin-bottom:14px}
.cta-banner p{color:rgba(255,255,255,.92);margin-bottom:0;font-size:1.06rem;max-width:540px}
.cta-banner .btns{display:flex;gap:12px;flex-wrap:wrap;justify-content:flex-end}
.cta-banner .btn--primary{background:#fff;color:var(--red-500);box-shadow:0 8px 30px rgba(0,0,0,.18)}
.cta-banner .btn--primary:hover{color:var(--red-500);transform:translateY(-2px)}
.cta-banner .btn--outline{box-shadow:inset 0 0 0 1.5px rgba(255,255,255,.6);color:#fff}
.cta-banner .btn--outline:hover{background:rgba(255,255,255,.12);color:#fff}
@media(max-width:768px){.cta-banner{grid-template-columns:1fr;padding:40px 28px}.cta-banner .btns{justify-content:flex-start}}

/* =====================  FORMS  ===================== */
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
@media(max-width:560px){.form-grid{grid-template-columns:1fr}}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-size:.84rem;font-weight:500;color:var(--ink-700)}
.field input,.field select,.field textarea{
  width:100%;padding:13px 14px;border:1px solid var(--line-strong);
  border-radius:var(--r-md);background:#fff;font-size:.96rem;
  transition:border-color .2s,box-shadow .2s;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:0;border-color:var(--red-500);box-shadow:0 0 0 4px rgba(227,36,40,.12);
}
.field textarea{min-height:120px;resize:vertical}
.field--full{grid-column:1/-1}

/* =====================  FOOTER  ===================== */
.site-footer{background:var(--ink-900);color:var(--ink-300);padding:72px 0 32px;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:48px;margin-bottom:40px}
@media(max-width:1024px){.foot-grid{grid-template-columns:1fr 1fr;gap:32px}}
@media(max-width:560px){.foot-grid{grid-template-columns:1fr}}
.brand--foot .momd-logo{height:40px;filter:brightness(0) invert(1)}
.brand--foot-icon{display:inline-block;margin-bottom:14px}
.brand--foot-icon .momd-foot-icon{
  height:54px;width:auto;display:block;
  transition:transform .25s var(--ease);
}
.brand--foot-icon:hover .momd-foot-icon{transform:scale(1.06)}
.site-footer h4{color:#fff;font-size:.92rem;text-transform:uppercase;letter-spacing:.08em;margin-bottom:18px;font-family:var(--ff-mono);font-weight:500}
.foot-list li{margin-bottom:10px}
.foot-list a{color:var(--ink-300);font-size:.94rem;transition:color .2s}
.foot-list a:hover{color:var(--orange-500)}
.foot-contact{display:flex;flex-direction:column;gap:8px;margin-top:18px}
.foot-contact a{display:inline-flex;align-items:center;gap:8px;color:#fff;font-weight:500}
.foot-contact a:hover{color:var(--orange-500)}
.foot-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;align-items:center;font-size:.86rem;color:var(--ink-400)}
.badge-row{display:flex;gap:10px;flex-wrap:wrap}

/* =====================  PAGE HEADER (inner pages)  ===================== */
.page-hero{
  position:relative;overflow:hidden;
  padding:calc(var(--header-h) + 56px) 0 64px;
  background:linear-gradient(180deg,#FAFAFC 0%,#fff 100%);
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(227,36,40,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(227,36,40,.05) 1px,transparent 1px);
  background-size:48px 48px;
  mask-image:radial-gradient(60% 60% at 80% 0%,#000,transparent 70%);
  -webkit-mask-image:radial-gradient(60% 60% at 80% 0%,#000,transparent 70%);
  pointer-events:none;
}
.page-hero .container{position:relative}
.crumbs{font-family:var(--ff-mono);font-size:.78rem;color:var(--ink-400);margin-bottom:16px;letter-spacing:.04em}
.crumbs a:hover{color:var(--red-500)}
.page-hero h1{margin-bottom:14px}
.page-hero p.lead{font-size:1.12rem;color:var(--ink-500);max-width:680px}

/* =====================  COURSE HERO — CLEAN, NO BG IMAGE  ===================== */
.course-hero{
  position:relative;overflow:hidden;color:#fff;
  padding:calc(var(--header-h) + 48px) 0 64px;
  background:
    radial-gradient(60% 50% at 100% 0%, rgba(255,107,53,.10), transparent 60%),
    radial-gradient(60% 60% at 0% 100%, rgba(227,36,40,.10), transparent 60%),
    linear-gradient(135deg, #0e0e10 0%, #1a0e10 100%);
}
.course-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.02) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.02) 1px,transparent 1px);
  background-size:48px 48px;
  mask-image:linear-gradient(180deg, transparent, rgba(0,0,0,.6) 60%, transparent);
  -webkit-mask-image:linear-gradient(180deg, transparent, rgba(0,0,0,.6) 60%, transparent);
}
.course-hero-inner{
  position:relative;z-index:2;
  /* Chừa khoảng phải 380px để sidebar cd-layout overlap vào, không che text */
  padding-right:calc(380px + 32px);
}
@media(max-width:1024px){
  .course-hero-inner{padding-right:0}
  .course-hero{padding:calc(var(--header-h) + 28px) 0 48px}
}
.course-hero-content{max-width:760px}

/* breadcrumb */
.course-hero .crumbs{color:rgba(255,255,255,.65);margin-bottom:18px}
.course-hero .crumbs a{color:rgba(255,255,255,.85)}
.course-hero .crumbs a:hover{color:var(--orange-500)}

/* chips */
.course-hero-chips{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:18px}
.course-hero-chips .chip{
  display:inline-flex;align-items:center;gap:5px;
  padding:5px 11px;border-radius:var(--r-pill);
  font-family:var(--ff-mono);font-size:.7rem;letter-spacing:.06em;text-transform:uppercase;font-weight:600;
  background:rgba(255,255,255,.08);color:#fff;
  border:1px solid rgba(255,255,255,.15);
  backdrop-filter:blur(8px);
  transition:background .2s,transform .2s;
}
.course-hero-chips a.chip:hover{background:rgba(255,255,255,.15);transform:translateY(-1px)}
.course-hero-chips .chip--level{background:rgba(255,107,53,.18);border-color:rgba(255,107,53,.4);color:#FF9F70}
.course-hero-chips .chip--cat{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.2)}
.course-hero-chips .chip--owned{background:rgba(34,197,94,.18);border-color:rgba(34,197,94,.4);color:#86efac}

/* title + lead */
.course-hero-title{
  font-size:clamp(1.8rem,3.2vw,2.6rem);font-weight:700;line-height:1.15;letter-spacing:-.02em;
  color:#fff;margin:0 0 14px;
}
.course-hero-lead{
  font-size:1rem;line-height:1.6;color:rgba(255,255,255,.78);
  margin:0 0 22px;
}

/* instructor */
.course-hero-instructor{
  display:inline-flex;align-items:center;gap:14px;
  padding:10px 18px 10px 10px;
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.1);
  border-radius:var(--r-pill);
  margin-bottom:24px;backdrop-filter:blur(12px);
}
.course-hero-instructor .ava{
  width:42px;height:42px;border-radius:50%;
  background:var(--grad-brand);
  display:grid;place-items:center;color:#fff;font-weight:700;font-family:var(--ff-display);font-size:.9rem;
  flex:0 0 42px;
}
.course-hero-instructor .info{line-height:1.2}
.course-hero-instructor .lbl{display:block;font-family:var(--ff-mono);font-size:.62rem;color:var(--orange-500);letter-spacing:.1em;text-transform:uppercase;margin-bottom:2px}
.course-hero-instructor strong{display:block;color:#fff;font-size:.96rem;font-weight:600}
.course-hero-instructor .role{display:block;color:rgba(255,255,255,.6);font-size:.78rem;margin-top:2px}

/* stats — horizontal row, reset hoàn toàn .stat global */
.course-hero-stats{
  display:flex;flex-wrap:wrap;gap:0;
  padding:0;background:none;border:0;border-radius:0;backdrop-filter:none;
  margin-top:24px;
}
.course-hero-stats .stat{
  padding:0 24px !important;text-align:left;
  background:none !important;border:0 !important;border-right:1px solid rgba(255,255,255,.12) !important;
  border-radius:0 !important;overflow:visible !important;
  position:static !important;
}
.course-hero-stats .stat::before{display:none !important}
.course-hero-stats .stat:first-child{padding-left:0 !important}
.course-hero-stats .stat:last-child{border-right:0 !important;padding-right:0 !important}
.course-hero-stats .stat-num{
  font-family:var(--ff-display);font-weight:700;font-size:1.5rem;line-height:1;color:#fff;
  display:flex;align-items:center;gap:6px;
}
.course-hero-stats .stat-num .ico{color:var(--orange-500)}
.course-hero-stats .stat-lbl{
  font-size:.78rem;color:rgba(255,255,255,.55);margin-top:6px;
  font-family:var(--ff-body);text-transform:none;letter-spacing:0;
}
@media(max-width:560px){
  .course-hero-stats .stat{padding:0 14px}
  .course-hero-stats .stat-num{font-size:1.2rem}
}

/* RIGHT COLUMN: floating preview card */
.course-hero-card-wrap{
  position:relative;
}
.course-hero-card-wrap{position:relative}
.course-hero-card{
  position:relative;display:block;width:100%;padding:0;border:0;
  aspect-ratio:16/9;
  background:#1a1a1d;color:#fff;
  border-radius:14px;overflow:hidden;
  cursor:pointer;font:inherit;
  box-shadow:0 20px 50px rgba(0,0,0,.4), 0 0 0 1px rgba(255,255,255,.08);
  transition:transform .35s var(--ease-out),box-shadow .35s var(--ease-out);
}
button.course-hero-card{cursor:pointer}
.course-hero-card:hover{
  transform:translateY(-4px);
  box-shadow:0 28px 70px rgba(227,36,40,.3), 0 0 0 1px rgba(255,107,53,.25);
}
.course-hero-card img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
}
.course-hero-card .card-overlay{
  position:absolute;inset:0;
  background:linear-gradient(180deg, rgba(0,0,0,.15) 0%, rgba(0,0,0,.55) 100%);
}
.course-hero-card .card-play{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:72px;height:72px;border-radius:50%;
  background:#fff;color:var(--red-500);
  display:grid;place-items:center;
  box-shadow:0 12px 32px rgba(0,0,0,.4);
  transition:transform .3s var(--ease);
  z-index:2;
}
.course-hero-card:hover .card-play{transform:translate(-50%,-50%) scale(1.08)}
.course-hero-card .card-play .ico{margin-left:3px}
.course-hero-card .card-cta{
  position:absolute;left:50%;bottom:14px;transform:translateX(-50%);
  background:rgba(0,0,0,.7);color:#fff;padding:6px 14px;border-radius:var(--r-pill);
  font-size:.78rem;font-weight:600;white-space:nowrap;backdrop-filter:blur(8px);z-index:2;
  font-family:var(--ff-body);
}
.course-hero-card .float-badge{
  position:absolute;z-index:3;
  display:inline-flex;align-items:center;gap:5px;
  padding:5px 11px;border-radius:var(--r-pill);
  font-family:var(--ff-mono);font-size:.72rem;font-weight:600;
  background:rgba(0,0,0,.7);color:#fff;backdrop-filter:blur(8px);
  border:1px solid rgba(255,255,255,.15);
}
.course-hero-card .float-badge.tl{top:12px;left:12px;background:var(--grad-brand);border-color:transparent}
.course-hero-card .float-badge.br{bottom:50px;right:12px}
.course-hero-card.course-hero-card--static{cursor:default}
.course-hero-card.course-hero-card--static:hover{transform:none}

/* =====================  COURSE DETAIL  ===================== */
/* COURSE SHELL — sidebar position:fixed Udemy-style */
.course-shell{position:relative}

/* Sidebar: fixed bên phải, luôn visible từ đầu hero */
.course-shell-aside{
  position:fixed;
  top:calc(var(--header-h) + 16px);
  right:max(24px, calc((100vw - 1240px) / 2 + 24px));
  width:360px;
  max-height:calc(100vh - var(--header-h) - 32px);
  overflow-y:auto;
  z-index:50;
}
.course-shell-aside::-webkit-scrollbar{width:6px}
.course-shell-aside::-webkit-scrollbar-thumb{background:rgba(0,0,0,.15);border-radius:6px}
.course-shell-aside .cd-side{position:static}

/* Mọi container của hero + body chừa chỗ phải cho sidebar */
.course-shell-main .container{padding-right:calc(360px + 32px)}
.course-shell-main .course-hero-inner{padding-right:calc(360px + 32px)}

@media(max-width:1180px){
  .course-shell-aside{right:24px;width:320px}
  .course-shell-main .container{padding-right:calc(320px + 28px)}
  .course-shell-main .course-hero-inner{padding-right:calc(320px + 28px)}
}
@media(max-width:1024px){
  .course-shell-aside{position:static;width:auto;max-width:560px;margin:32px auto;padding:0 24px;overflow:visible;max-height:none}
  .course-shell-main .container{padding-right:24px}
  .course-shell-main .course-hero-inner{padding-right:0}
}

/* legacy cd-layout: reset nếu còn sót */
.cd-layout{display:block}
.cd-layout > aside{margin-top:0;position:static}

/* =====================  ENROLL CARD — UDEMY STYLE  ===================== */
.enroll-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:14px;
  overflow:hidden;
  box-shadow:0 24px 48px rgba(0,0,0,.12), 0 4px 12px rgba(0,0,0,.06);
}

/* Preview thumbnail (featured image + dark overlay) */
.enroll-preview{
  position:relative;display:block;width:100%;padding:0;border:0;
  aspect-ratio:16/9;
  background:#1a0a0c;color:#fff;
  cursor:pointer;font:inherit;text-align:center;
  overflow:hidden;
}
.enroll-preview-img{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:cover;
  transition:transform .5s var(--ease-out);
}
.enroll-preview:hover .enroll-preview-img{transform:scale(1.04)}
.enroll-preview-fallback{
  position:absolute;inset:0;
  background:linear-gradient(135deg,#1a0a0c,#3d1a10);
}
.enroll-preview-overlay{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(0,0,0,.2) 0%,rgba(0,0,0,.65) 100%);
}
.enroll-preview-play{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:64px;height:64px;border-radius:50%;
  background:#fff;color:var(--red-500);
  display:grid;place-items:center;
  box-shadow:0 12px 32px rgba(0,0,0,.5);
  transition:transform .25s var(--ease);z-index:2;
}
.enroll-preview-play .ico{margin-left:3px}
.enroll-preview:hover .enroll-preview-play{transform:translate(-50%,-50%) scale(1.08)}
.enroll-preview-label{
  position:absolute;left:0;right:0;bottom:12px;
  color:#fff;font-size:.84rem;font-weight:600;z-index:2;
  text-shadow:0 1px 4px rgba(0,0,0,.7);
}

.enroll-body{padding:22px}

.enroll-owned{
  padding:14px;background:linear-gradient(135deg,#16a34a,#22c55e);color:#fff;
  border-radius:var(--r-md);text-align:center;margin-bottom:14px;font-weight:600;
}

.enroll-price{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;margin-bottom:18px}
.enroll-price .now{
  font-family:var(--ff-display);font-weight:700;font-size:2rem;color:var(--ink-900);line-height:1;
}
.enroll-price .old{
  font-size:1rem;color:var(--ink-300);text-decoration:line-through;
}
.enroll-price .save{
  background:linear-gradient(135deg,#E32428,#FF6B35);color:#fff;
  font-family:var(--ff-mono);font-weight:700;font-size:.78rem;
  padding:3px 8px;border-radius:var(--r-pill);
}

.enroll-actions{display:flex;flex-direction:column;gap:10px;margin-bottom:16px}
.enroll-balance{
  text-align:center;font-size:.78rem;color:var(--ink-500);margin:4px 0 0;
}
.enroll-balance strong{color:var(--red-500)}

.enroll-trust{
  display:flex;flex-direction:column;gap:6px;
  padding:14px 0;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  margin-bottom:18px;
  font-size:.82rem;color:var(--ink-500);
}
.enroll-trust span{display:flex;align-items:center;gap:8px}
.enroll-trust .ico{color:#16a34a}

.enroll-section-title{
  font-size:.82rem;text-transform:uppercase;letter-spacing:.06em;
  color:var(--ink-400);margin:0 0 10px;font-family:var(--ff-mono);font-weight:600;
}
.enroll-feats{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.enroll-feats li{
  display:flex;align-items:center;gap:10px;
  font-size:.88rem;color:var(--ink-700);
}
.enroll-feats li .ico{color:var(--red-500);flex:0 0 auto}

.enroll-instructor{
  display:flex;align-items:center;gap:12px;
  padding-top:14px;border-top:1px solid var(--line);
}
.enroll-instructor .ava{
  width:44px;height:44px;border-radius:50%;
  background:var(--grad-brand);
  display:grid;place-items:center;color:#fff;font-weight:700;font-family:var(--ff-display);font-size:.92rem;
  flex:0 0 44px;
}
.enroll-instructor .info{line-height:1.2}
.enroll-instructor .lbl{display:block;font-family:var(--ff-mono);font-size:.62rem;color:var(--orange-500);letter-spacing:.1em;text-transform:uppercase;margin-bottom:2px}
.enroll-instructor strong{display:block;color:var(--ink-900);font-size:.94rem;font-weight:600}
.enroll-instructor .role{display:block;color:var(--ink-400);font-size:.78rem;margin-top:2px}

/* Outline button variant nếu chưa có */
.btn--outline{background:transparent;color:var(--ink-900);box-shadow:inset 0 0 0 1.5px var(--ink-900)}
.btn--outline:hover{background:var(--ink-900);color:#fff}
.cd-side{
  position:sticky;
  top:calc(var(--header-h) + 16px);
  max-height:calc(100vh - var(--header-h) - 32px);
  overflow-y:auto;
  padding-right:4px;
}
.cd-side::-webkit-scrollbar{width:6px}
.cd-side::-webkit-scrollbar-thumb{background:rgba(0,0,0,.15);border-radius:6px}
@media(max-width:1024px){
  .cd-layout > aside{margin-top:0}
  .cd-side{position:static;max-height:none;overflow:visible}
}

/* Card style — nâng shadow vì đứng trên nền tối + nền sáng */
.cd-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  box-shadow:0 20px 50px rgba(0,0,0,.18);
}
.cd-card .preview{aspect-ratio:16/9;background:linear-gradient(135deg,#1A1A1D,#3A3A40);position:relative;display:grid;place-items:center;color:#fff;cursor:pointer}
.cd-card .preview::after{content:"";position:absolute;inset:0;background:var(--grad-brand-glow)}
.cd-card .preview .play{position:relative;z-index:1;width:64px;height:64px;border-radius:50%;background:#fff;color:var(--red-500);display:grid;place-items:center;box-shadow:0 12px 30px rgba(0,0,0,.4);transition:transform .25s}
.cd-card .preview:hover .play{transform:scale(1.08)}
.cd-card .body{padding:24px}
.cd-card .price{font-family:var(--ff-display);font-weight:700;font-size:2rem;color:var(--ink-900)}
.cd-card .old{color:var(--ink-300);text-decoration:line-through;font-size:1rem;margin-left:8px}
.cd-card .save{display:inline-block;margin-left:6px;padding:3px 8px;background:var(--grad-brand-soft);color:var(--red-500);font-size:.78rem;font-weight:600;border-radius:var(--r-pill)}
.cd-card .feat{display:flex;align-items:center;gap:10px;color:var(--ink-700);font-size:.92rem;padding:8px 0;border-bottom:1px dashed var(--line)}
.cd-card .feat:last-of-type{border-bottom:0;margin-bottom:14px}
.cd-card .feat .ico{color:var(--red-500)}

.modules{display:flex;flex-direction:column;gap:10px}
.module{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;
}
.module summary{
  list-style:none;padding:18px 20px;display:flex;align-items:center;justify-content:space-between;
  cursor:pointer;user-select:none;
}
.module summary::-webkit-details-marker{display:none}
.module summary h4{margin:0;font-size:1.02rem;display:flex;align-items:center;gap:14px}
.module summary h4 .num{font-family:var(--ff-mono);font-size:.78rem;color:var(--red-500);background:var(--grad-brand-soft);padding:4px 10px;border-radius:var(--r-pill);font-weight:600}
.module summary .chev{transition:transform .25s}
.module[open] summary .chev{transform:rotate(180deg)}
.module .lessons{padding:0;margin-top:0}
.module .lessons > li.lesson-item{list-style:none;border-top:1px solid var(--line)}
.module .lessons > li.lesson-item:first-child{border-top:0}

/* Flat clickable lesson row — click toàn bộ row → mở modal */
.lesson-item .lesson-row-flat{
  padding:14px 20px;display:flex;align-items:center;gap:12px;
  font-size:.94rem;color:var(--ink-700);
  transition:background .2s;
  user-select:none;
}
.lesson-item.is-playable .lesson-row-flat{cursor:pointer}
.lesson-item.is-playable .lesson-row-flat:hover{background:var(--surf)}
.lesson-item.is-playable .lesson-row-flat:hover .play-mini{background:var(--grad-brand);color:#fff}
.lesson-mat-count{
  flex:0 0 auto;
  display:inline-flex;align-items:center;gap:4px;
  font-family:var(--ff-mono);font-size:.72rem;color:var(--ink-400);
  padding:3px 9px;border-radius:var(--r-pill);
  background:var(--surf-2);
}
.lesson-cta{flex:0 0 auto}
.lesson-item .play-mini{
  width:30px;height:30px;border-radius:50%;background:var(--surf-2);color:var(--ink-700);
  display:grid;place-items:center;flex:0 0 30px;transition:background .2s,color .2s,transform .2s;
  border:0;padding:0;cursor:pointer;font:inherit;
}
.lesson-item .play-mini--btn:hover{background:var(--grad-brand);color:#fff;transform:scale(1.1)}
.lesson-item.is-playable details > summary:hover .play-mini{background:var(--grad-brand);color:#fff}
.lesson-item .play-mini.is-locked{background:rgba(0,0,0,.06);color:var(--ink-400);cursor:not-allowed}
.lesson-item-title{flex:1;min-width:0}
.lesson-item.is-locked .lesson-item-title{color:var(--ink-500)}
.lesson-item .dur{font-family:var(--ff-mono);font-size:.78rem;color:var(--ink-400);flex:0 0 auto}
.lesson-item-chev{flex:0 0 auto;color:var(--ink-300);transition:transform .25s var(--ease)}
.lesson-item details[open] .lesson-item-chev{transform:rotate(90deg)}

/* Expand area */
.lesson-item-expand{
  padding:6px 20px 20px 62px;
  background:var(--surf);
  border-top:1px dashed var(--line);
  font-size:.92rem;
}
.lesson-item-desc{
  color:var(--ink-700);line-height:1.6;margin:14px 0;
}
.lesson-item-mats{margin:14px 0}
.lesson-item-mats h5{
  font-size:.78rem;text-transform:uppercase;letter-spacing:.06em;
  color:var(--ink-500);font-family:var(--ff-mono);font-weight:600;margin:0 0 10px;
}
.lesson-item-mats ul{display:flex;flex-direction:column;gap:6px;list-style:none;padding:0;margin:0}
.lesson-item-mats li{
  display:flex;align-items:center;gap:10px;
  padding:8px 12px;background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);
  list-style:none;
}
.lesson-item-mats li::before{display:none}
.lesson-item-mats li.is-locked{opacity:.65}
.mat-mini-ico{
  flex:0 0 32px;width:32px;height:32px;border-radius:var(--r-sm);
  display:grid;place-items:center;font-size:16px;line-height:1;
}
.mat-mini-info{flex:1;min-width:0;line-height:1.3}
.mat-mini-info strong{display:block;font-size:.88rem;color:var(--ink-900);font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mat-mini-info em{font-style:normal;font-family:var(--ff-mono);font-size:.7rem;color:var(--ink-400)}
.mat-badge-free{
  font-family:var(--ff-mono);font-size:.66rem;font-weight:700;
  padding:2px 8px;border-radius:var(--r-pill);
  background:#dcfce7;color:#166534;flex:0 0 auto;
}
.mat-mini-action{
  flex:0 0 32px;width:32px;height:32px;border-radius:50%;
  background:var(--surf-2);color:var(--ink-700);
  display:grid;place-items:center;
  transition:background .2s,color .2s;
}
.mat-mini-action:hover{background:var(--grad-brand);color:#fff}
.mat-mini-lock{flex:0 0 auto;font-size:14px;color:var(--ink-400)}

.lesson-item-actions{margin-top:14px;display:flex;gap:8px;flex-wrap:wrap}
.lesson-item-actions .btn{padding:8px 14px;font-size:.84rem}

@media(max-width:640px){
  .lesson-item-expand{padding-left:20px}
}

/* =====================  COURSE PLAYER  ===================== */
.player-shell{
  display:grid;grid-template-columns:1fr 360px;gap:0;
  height:calc(100vh - var(--header-h));min-height:600px;
  background:#0A0A0C;
}
@media(max-width:1024px){.player-shell{grid-template-columns:1fr;height:auto}}
.player-main{display:flex;flex-direction:column;min-width:0}
.player-stage{
  position:relative;flex:1;background:#000;display:grid;place-items:center;overflow:hidden;
  aspect-ratio:16/9;
}
@media(max-width:1024px){.player-stage{aspect-ratio:16/9;flex:0 0 auto}}
.player-stage .player-svg-bg{position:absolute;inset:0;width:100%;height:100%;z-index:1}
.player-stage .vid-bg{
  position:absolute;inset:0;
  background:
    radial-gradient(50% 50% at 50% 50%,rgba(255,107,53,.15),transparent 70%),
    linear-gradient(135deg,#1A1A1D,#0A0A0C);
}
.player-stage .grid-bg{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:48px 48px;mask-image:radial-gradient(80% 80% at 50% 50%,#000,transparent);-webkit-mask-image:radial-gradient(80% 80% at 50% 50%,#000,transparent)}
.player-stage .play-big{
  position:relative;z-index:2;width:88px;height:88px;border-radius:50%;
  background:rgba(255,255,255,.95);color:var(--red-500);display:grid;place-items:center;
  box-shadow:0 24px 60px rgba(0,0,0,.5);cursor:pointer;
  transition:transform .25s var(--ease);
}
.player-stage .play-big:hover{transform:scale(1.06)}
.player-stage .play-big.is-playing{background:rgba(0,0,0,.6);color:#fff;width:64px;height:64px;opacity:0}
.player-stage:hover .play-big.is-playing{opacity:1}
/* legacy class — không dùng nữa, ẩn nếu còn sót để khỏi che video */
.player-stage .lesson-title-big{display:none !important}

/* Title bar dưới video (không che subtitle, không chặn fullscreen button) */
.lesson-title-bar{
  background:#0a0a0c;color:#fff;
  padding:14px 24px;
  border-bottom:1px solid rgba(255,255,255,.06);
}
.lesson-title-bar .ep{
  font-family:var(--ff-mono);font-size:.72rem;color:var(--orange-500);
  letter-spacing:.1em;text-transform:uppercase;display:inline-block;margin-bottom:4px;
}
.lesson-title-bar h2{
  font-size:clamp(1.1rem,1.8vw,1.5rem);color:#fff;margin:0;font-weight:600;line-height:1.3;
}

.controls{
  background:linear-gradient(180deg,transparent,rgba(0,0,0,.85));
  padding:18px 24px;color:#fff;
  position:absolute;left:0;right:0;bottom:0;z-index:3;
}
.progress{position:relative;height:6px;border-radius:6px;background:rgba(255,255,255,.18);cursor:pointer;margin-bottom:14px}
.progress .bar{position:absolute;left:0;top:0;bottom:0;width:34%;background:var(--grad-brand);border-radius:6px}
.progress .head{position:absolute;top:50%;left:34%;transform:translate(-50%,-50%);width:14px;height:14px;border-radius:50%;background:#fff;box-shadow:0 0 0 4px rgba(227,36,40,.3)}
.progress .chap{position:absolute;top:0;bottom:0;width:2px;background:rgba(255,255,255,.45)}
.controls-row{display:flex;align-items:center;gap:14px;font-size:.86rem}
.ctrl-btn{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.1);transition:background .2s}
.ctrl-btn:hover{background:rgba(255,255,255,.2)}
.time{font-family:var(--ff-mono);font-size:.84rem;color:rgba(255,255,255,.85)}
.spacer{flex:1}
.speed{font-family:var(--ff-mono);font-size:.84rem;padding:6px 10px;border-radius:var(--r-pill);background:rgba(255,255,255,.1)}

.chapters-strip{
  background:#101013;color:#fff;padding:14px 24px;display:flex;gap:8px;overflow-x:auto;
  border-top:1px solid rgba(255,255,255,.06);
}
.chapters-strip .ch{
  flex:0 0 auto;padding:10px 14px;border-radius:var(--r-md);background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.08);cursor:pointer;transition:background .2s,border-color .2s;
  min-width:160px;
}
.chapters-strip .ch.active{background:var(--grad-brand-soft);border-color:rgba(255,107,53,.4)}
.chapters-strip .ch .t{font-family:var(--ff-mono);font-size:.74rem;color:var(--orange-500);margin-bottom:4px;display:block}
.chapters-strip .ch .n{font-size:.88rem}

.player-side{
  background:#101013;color:#fff;border-left:1px solid rgba(255,255,255,.06);
  display:flex;flex-direction:column;overflow:hidden;
}
.player-side h3{color:#fff;padding:18px 20px;margin:0;border-bottom:1px solid rgba(255,255,255,.06);font-size:1rem}
.player-side .pcrs-meta{padding:14px 20px;font-size:.82rem;color:var(--ink-300);border-bottom:1px solid rgba(255,255,255,.06)}
.player-side .pcrs-meta .bar{height:6px;border-radius:6px;background:rgba(255,255,255,.1);margin-top:8px;overflow:hidden}
.player-side .pcrs-meta .bar i{display:block;height:100%;width:0;background:var(--grad-brand);border-radius:6px;transition:width .6s var(--ease-out)}
.lesson-list{flex:1;overflow-y:auto}
.lesson-list .grp{padding:12px 20px;font-family:var(--ff-mono);font-size:.74rem;color:var(--ink-400);text-transform:uppercase;letter-spacing:.08em;background:rgba(255,255,255,.02)}
.lesson-list .item{
  display:flex;align-items:center;gap:12px;padding:14px 20px;cursor:pointer;
  border-left:3px solid transparent;transition:background .2s,border-color .2s;
  font-size:.9rem;
}
.lesson-list .item:hover{background:rgba(255,255,255,.04)}
.lesson-list .item.is-current{background:rgba(227,36,40,.12);border-left-color:var(--red-500)}
.lesson-list .item.is-done{color:var(--ink-300)}
.lesson-list .item .st{width:24px;height:24px;border-radius:50%;flex:0 0 24px;display:grid;place-items:center;background:rgba(255,255,255,.08)}
.lesson-list .item.is-done .st{background:var(--grad-brand);color:#fff}
.lesson-list .item .dur{margin-left:auto;font-family:var(--ff-mono);font-size:.74rem;color:var(--ink-400)}

/* =====================  BLOG  ===================== */
.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media(max-width:1024px){.blog-grid{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.blog-grid{grid-template-columns:1fr}}
.post{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  transition:transform .3s,box-shadow .3s;
}
.post:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.post .pthumb{aspect-ratio:16/10;background:linear-gradient(135deg,#1A1A1D,#3A3A40);position:relative;overflow:hidden}
.post .pthumb::after{content:"";position:absolute;inset:0;background:var(--grad-brand-glow);mix-blend-mode:screen}
.post .pmeta{font-family:var(--ff-mono);font-size:.74rem;color:var(--ink-400);letter-spacing:.04em;margin-bottom:10px}
.post .pbody{padding:22px}
.post h3{font-size:1.1rem;margin-bottom:10px;line-height:1.3}
.post p{color:var(--ink-500);font-size:.92rem;margin-bottom:16px}
.post .more{font-weight:600;color:var(--red-500);font-size:.9rem;display:inline-flex;align-items:center;gap:6px}
.post .more:hover .ico{transform:translateX(4px)}

/* =====================  ABOUT  ===================== */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
@media(max-width:768px){.about-grid{grid-template-columns:1fr}}
.team{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
@media(max-width:1024px){.team{grid-template-columns:repeat(2,1fr)}}
.member{text-align:center;padding:24px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);transition:transform .3s,box-shadow .3s}
.member:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.member .ava{width:96px;height:96px;border-radius:50%;background:var(--grad-brand);display:grid;place-items:center;margin:0 auto 14px;color:#fff;font-family:var(--ff-display);font-weight:700;font-size:1.8rem}
.member h4{margin-bottom:4px}
.member .role{color:var(--ink-400);font-size:.86rem;margin-bottom:10px}

/* =====================  CONTACT  ===================== */
.contact-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:40px;align-items:start}
@media(max-width:1024px){.contact-grid{grid-template-columns:1fr}}
.contact-info{background:var(--ink-900);color:#fff;padding:36px;border-radius:var(--r-xl);position:sticky;top:calc(var(--header-h) + 24px)}
.contact-info h3{color:#fff;margin-bottom:8px}
.contact-info p{color:var(--ink-300);margin-bottom:24px}
.contact-info .ci{display:flex;gap:14px;align-items:flex-start;padding:14px 0;border-bottom:1px solid rgba(255,255,255,.08)}
.contact-info .ci:last-child{border-bottom:0}
.contact-info .ci .ico-wrap{width:42px;height:42px;border-radius:var(--r-md);background:var(--grad-brand);display:grid;place-items:center;flex:0 0 42px}
.contact-info .ci strong{display:block;color:#fff;margin-bottom:2px}
.contact-info .ci a,.contact-info .ci span{color:var(--ink-300);font-size:.94rem}

.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-xl);padding:36px;box-shadow:var(--shadow-sm)}

/* =====================  CATEGORY CHIPS  ===================== */
.cat-chips{
  display:flex;flex-wrap:wrap;gap:8px;margin-bottom:32px;
  padding:14px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
}
.cat-chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;border-radius:var(--r-pill);
  background:var(--surf-2);color:var(--ink-700);
  font-size:.88rem;font-weight:500;
  transition:background .2s,color .2s,transform .2s;
}
.cat-chip:hover{background:var(--ink-200);color:var(--ink-900);transform:translateY(-1px)}
.cat-chip.is-active{background:var(--grad-brand);color:#fff;box-shadow:0 4px 14px rgba(227,36,40,.32)}
.cat-chip .cat-count{
  display:inline-block;padding:1px 7px;border-radius:999px;
  background:rgba(0,0,0,.08);font-family:var(--ff-mono);font-size:.72rem;font-weight:600;
}
.cat-chip.is-active .cat-count{background:rgba(255,255,255,.25);color:#fff}

.course-cat-badge{
  position:absolute;top:50px;left:14px;z-index:3;
  background:rgba(255,255,255,.92);color:var(--ink-900);
  padding:3px 9px;border-radius:var(--r-pill);
  font-family:var(--ff-mono);font-size:.66rem;font-weight:600;
  letter-spacing:.04em;text-transform:uppercase;
  backdrop-filter:blur(8px);
  box-shadow:0 2px 8px rgba(0,0,0,.15);
}

/* =====================  COURSE MATERIALS  ===================== */
.course-materials{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:10px}
.mat-item{
  display:flex;align-items:center;gap:14px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:14px 16px;color:var(--ink-900);text-decoration:none;
  transition:transform .25s var(--ease),box-shadow .25s,border-color .25s;
}
.mat-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm);border-color:transparent;color:var(--red-500)}
.mat-ico{
  flex:0 0 44px;width:44px;height:44px;border-radius:var(--r-sm);
  display:grid;place-items:center;font-size:22px;line-height:1;
}
.mat-info{flex:1;min-width:0;line-height:1.3}
.mat-info strong{display:block;font-size:.94rem;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mat-info em{font-style:normal;font-family:var(--ff-mono);font-size:.72rem;color:var(--ink-400);letter-spacing:.04em}
.mat-arr{flex:0 0 auto;color:var(--ink-300);transition:color .25s,transform .25s}
.mat-item:hover .mat-arr{color:var(--red-500);transform:translateX(2px)}

/* =====================  AUTH PAGES (LOGIN / REGISTER)  ===================== */
.auth-section{
  min-height:calc(100vh - var(--header-h));
  display:grid;place-items:center;
  padding:48px 24px 72px;
  background:
    radial-gradient(60% 50% at 100% 0%, rgba(255,107,53,.10), transparent 60%),
    radial-gradient(50% 60% at 0% 100%, rgba(227,36,40,.08), transparent 60%),
    linear-gradient(180deg, #FAFAFC, #fff);
}
.auth-card{
  width:100%;max-width:440px;
  background:#fff;
  border-radius:20px;
  box-shadow:0 30px 80px rgba(14,14,16,.10), 0 0 0 1px var(--line);
  padding:36px 32px;
}
.auth-head{text-align:center;margin-bottom:24px}
.auth-logo{display:inline-block;margin-bottom:16px}
.auth-logo .momd-logo{height:64px;width:auto;display:block}
.auth-logo .momd-logo--vuong{height:72px}
.auth-head h1{font-size:1.6rem;margin:0 0 6px}
.auth-head p{color:var(--ink-500);font-size:.94rem;margin:0}
.auth-error{
  padding:12px 14px;background:#fef2f2;color:#991b1b;
  border:1px solid #fecaca;border-radius:var(--r-md);
  font-size:.86rem;margin-bottom:18px;
}
.auth-error.is-success{background:#f0fdf4;color:#166534;border-color:#bbf7d0}
.auth-form{display:flex;flex-direction:column;gap:14px}
.auth-field label{
  display:flex;justify-content:space-between;align-items:center;
  font-size:.86rem;font-weight:500;color:var(--ink-700);
  margin-bottom:6px;
}
.auth-forgot{font-size:.78rem;color:var(--red-500);font-weight:500}
.auth-forgot:hover{text-decoration:underline}
.auth-field input[type=text],
.auth-field input[type=email],
.auth-field input[type=password]{
  width:100%;padding:13px 14px;
  border:1px solid var(--line-strong);
  border-radius:var(--r-md);
  font-size:.96rem;background:#fff;
  transition:border-color .2s,box-shadow .2s;
}
.auth-field input:focus{
  outline:0;border-color:var(--red-500);
  box-shadow:0 0 0 4px rgba(227,36,40,.12);
}
.auth-pass-wrap{position:relative}
.auth-pass-wrap input{padding-right:48px !important}
.auth-pass-toggle{
  position:absolute;right:8px;top:50%;transform:translateY(-50%);
  width:36px;height:36px;border-radius:8px;border:0;
  background:transparent;cursor:pointer;font-size:18px;
  color:var(--ink-400);
}
.auth-pass-toggle:hover{background:var(--surf-2)}
.auth-check{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.86rem;color:var(--ink-700);cursor:pointer;
  user-select:none;
}
.auth-check input{accent-color:var(--red-500)}
.auth-form .btn{margin-top:6px}
.auth-terms{
  font-size:.78rem;color:var(--ink-400);line-height:1.5;
  margin:6px 0 0;
}
.auth-terms a{color:var(--ink-700);text-decoration:underline}
.auth-switch{
  text-align:center;color:var(--ink-500);font-size:.92rem;
  margin:14px 0 0;padding-top:18px;border-top:1px solid var(--line);
}
.auth-switch a{color:var(--red-500);font-weight:600}
.auth-switch a:hover{text-decoration:underline}

@media(max-width:480px){
  .auth-card{padding:28px 22px;border-radius:16px}
  .auth-head h1{font-size:1.35rem}
}

/* =====================  REVEAL  ===================== */
[data-reveal]{opacity:0;transform:translateY(24px);transition:opacity .8s var(--ease-out),transform .8s var(--ease-out)}
[data-reveal].is-in{opacity:1;transform:none}
[data-reveal][data-delay="1"]{transition-delay:.08s}
[data-reveal][data-delay="2"]{transition-delay:.16s}
[data-reveal][data-delay="3"]{transition-delay:.24s}
[data-reveal][data-delay="4"]{transition-delay:.32s}

/* =====================  UTIL  ===================== */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
@media(max-width:768px){.grid-2{grid-template-columns:1fr}}
.center{text-align:center}
.mt-32{margin-top:32px}
.mb-0{margin-bottom:0}

/* selection */
::selection{background:var(--red-500);color:#fff}

/* scrollbars in dark areas */
.lesson-list::-webkit-scrollbar,.chapters-strip::-webkit-scrollbar{width:8px;height:8px}
.lesson-list::-webkit-scrollbar-thumb,.chapters-strip::-webkit-scrollbar-thumb{background:rgba(255,255,255,.1);border-radius:4px}
.lesson-list::-webkit-scrollbar-thumb:hover,.chapters-strip::-webkit-scrollbar-thumb:hover{background:rgba(255,255,255,.2)}