:root{
  --bg:#02060b;
  --bg2:#07111d;
  --panel:#091522;
  --panel2:#0d1b2a;
  --text:#f5f8ff;
  --muted:#8494a8;
  --cyan:#00aeea;
  --cyan2:#1fc8ff;
  --red:#e9293f;
  --green:#4ce2a3;
  --line:rgba(255,255,255,.10);
  --max:1180px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:
    radial-gradient(circle at 78% 9%,rgba(0,174,234,.11),transparent 28%),
    radial-gradient(circle at 16% 28%,rgba(233,41,63,.08),transparent 22%),
    var(--bg);
  color:var(--text);
  font-family:"Manrope",Arial,sans-serif;
  overflow-x:hidden;
}
body.modal-lock{overflow:hidden}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{color:inherit}
.wrap{width:min(var(--max),calc(100% - 44px));margin:auto}

.grid-bg{
  position:fixed;inset:0;pointer-events:none;z-index:-1;opacity:.24;
  background-image:
    linear-gradient(rgba(0,174,234,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(0,174,234,.06) 1px,transparent 1px);
  background-size:48px 48px;
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.7),transparent 85%);
}

.btn{
  min-height:44px;padding:0 19px;border-radius:5px;border:1px solid rgba(255,255,255,.12);
  background:linear-gradient(135deg,var(--cyan),#0977d0);color:white;
  font-family:"Be Vietnam Pro",sans-serif;font-size:12px;font-weight:700;cursor:pointer;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  box-shadow:0 0 24px rgba(0,174,234,.18);transition:.2s ease
}
.btn:hover{transform:translateY(-2px);box-shadow:0 0 34px rgba(0,174,234,.30)}
.btn.alt{background:transparent;color:white;box-shadow:none}

/* HERO */
.hero{min-height:100vh;padding:55px 0 75px;display:grid;align-items:center;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:68px;align-items:center;position:relative;z-index:2}
.hero-main-logo{width:100%;max-width:690px;margin:0 0 34px;display:flex;align-items:center}
.hero-main-logo img{display:block;width:100%;height:auto;object-fit:contain;object-position:left center;filter:drop-shadow(0 0 20px rgba(0,174,234,.10))}
.hero-copy{font-size:18px;line-height:1.68;color:#b1bdcc;max-width:670px;margin:0 0 29px}
.hero-copy strong{color:#fff;font-weight:700}
.hero-copy .highlight{color:var(--cyan2);font-weight:700}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}

.hero-photo{
  min-height:610px;border:1px solid rgba(255,255,255,.12);border-radius:18px;
  overflow:hidden;position:relative;background:#0b121a;box-shadow:0 30px 90px rgba(0,0,0,.45)
}
.hero-photo>img{width:100%;height:100%;object-fit:cover;object-position:center 28%;display:block;filter:saturate(.9) contrast(1.04)}
.hero-photo:after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(180deg,transparent 31%,rgba(2,6,11,.95) 100%),
    linear-gradient(90deg,rgba(0,174,234,.10),transparent 35%)
}
.photo-grid{
  position:absolute;inset:0;z-index:1;opacity:.22;pointer-events:none;
  background-image:
    linear-gradient(rgba(0,174,234,.20) 1px,transparent 1px),
    linear-gradient(90deg,rgba(0,174,234,.20) 1px,transparent 1px);
  background-size:36px 36px
}
.photo-cap{position:absolute;left:28px;right:28px;bottom:26px;z-index:3;display:flex;flex-direction:column;align-items:flex-start}
.quanmax-name{font-family:"Be Vietnam Pro",sans-serif;font-size:26px;line-height:1.15;font-weight:800;letter-spacing:-.02em;color:#fff;margin-bottom:7px}
.quanmax-tagline{font-family:"Be Vietnam Pro",sans-serif;font-size:15px;line-height:1.35;font-weight:700;color:var(--cyan2);margin-bottom:14px}
.quanmax-bio{margin:0;max-width:455px;font-size:14px;line-height:1.7;font-weight:500;color:#b5c2d2}

/* HEADINGS */
.section-head{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:30px}
.section-head h2{
  font-family:"Be Vietnam Pro",sans-serif;font-size:clamp(34px,4.1vw,54px);
  line-height:1.12;letter-spacing:-.035em;margin:0;font-weight:800;max-width:900px
}
.section-head h2 span{color:var(--cyan2)}
.section-head p{max-width:420px;margin:0;color:#8798ac;font-size:13px;line-height:1.65}
.section-sub{margin:10px 0 0;color:#7f91a5;font-size:13px;line-height:1.7;max-width:760px}

/* COURSE VIDEOS */
.videos{padding:92px 0 100px;background:linear-gradient(180deg,#03070c,#06111b)}
.video-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.video-card,.feedback-video-card{
  aspect-ratio:16/9;border-radius:16px;overflow:hidden;position:relative;
  background:
    radial-gradient(circle at 28% 24%,rgba(0,174,234,.35),transparent 24%),
    radial-gradient(circle at 76% 76%,rgba(233,41,63,.22),transparent 22%),
    linear-gradient(135deg,#07111c,#0d1b2b);
  border:1px solid rgba(255,255,255,.09)
}
.video-card iframe,.feedback-video-card iframe{width:100%;height:100%;border:0;display:block}
.video-placeholder{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:10px;color:#d8e6f4}
.video-placeholder span{font-family:"Be Vietnam Pro",sans-serif;font-weight:700}
.video-placeholder small{color:#64788e;font-size:10px}
.play{
  width:66px;height:66px;border-radius:50%;display:grid;place-items:center;
  background:rgba(255,255,255,.95);color:#07111c;font-size:22px;padding-left:4px;
  box-shadow:0 0 35px rgba(0,174,234,.20);margin-bottom:5px
}

/* PROJECTS — 4 IN ONE ROW, 1600x1000 / 8:5 */
.work{padding:100px 0;background:#040a10}
.work-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px;
}
.work-card{
  position:relative;aspect-ratio:8/5;overflow:hidden;border-radius:14px;
  border:1px solid rgba(255,255,255,.10);background:#07111a;cursor:pointer
}
.project-cover{width:100%;height:100%;object-fit:cover;display:block;transition:transform .45s ease,filter .45s ease}
.project-overlay{
  position:absolute;left:0;right:0;bottom:0;z-index:2;padding:46px 16px 14px;
  background:linear-gradient(180deg,transparent,rgba(2,6,11,.92));
  display:flex;flex-direction:column;align-items:flex-start;pointer-events:none
}
.project-overlay span{font-family:"Be Vietnam Pro",sans-serif;font-size:8px;font-weight:600;letter-spacing:.12em;color:var(--cyan2);margin-bottom:4px}
.project-overlay strong{font-family:"Be Vietnam Pro",sans-serif;font-size:14px;line-height:1.25;font-weight:700;color:#fff}
.work-card:hover .project-cover{transform:scale(1.045);filter:brightness(.78)}

/* GENERIC GALLERY MODAL */
.gallery-modal{
  position:fixed;inset:0;z-index:300;display:none;overflow-y:auto;
  background:rgba(1,5,9,.96);padding:70px 24px 50px
}
.gallery-modal.open{display:block}
.gallery-modal-inner{width:min(1100px,100%);margin:auto}
.gallery-modal h3{
  font-family:"Be Vietnam Pro",sans-serif;font-size:30px;line-height:1.25;
  margin:0 0 24px;color:#fff
}
.gallery-close{
  position:fixed;right:24px;top:20px;z-index:320;width:44px;height:44px;border-radius:50%;
  border:1px solid rgba(255,255,255,.15);background:#0b1723;color:#fff;font-size:24px;cursor:pointer
}
.project-gallery,.feedback-gallery-all{display:grid;grid-template-columns:1fr;gap:18px}
.project-gallery img,.feedback-gallery-all img{width:100%;height:auto;display:block;border-radius:12px;border:1px solid rgba(255,255,255,.08)}

/* FEEDBACK */

.feedback{
  padding:140px 0 150px;
  background:#07111b;
}


/* TIÊU ĐỀ PHẦN FEEDBACK */

.feedback .section-head{
  margin-bottom:34px;
}

.feedback .section-head h2{
  max-width:none;

  white-space:nowrap;

  font-size:clamp(
    32px,
    3.4vw,
    48px
  );
}


/* DÒNG MÔ TẢ */

.feedback .section-sub{
  margin-top:14px;

  max-width:760px;

  font-size:16px;

  line-height:1.7;

  color:#91a4b8;
}


/* 3 VIDEO FEEDBACK */

.feedback-video-grid{
  display:grid;

  grid-template-columns:
    repeat(3,1fr);

  gap:18px;

  margin-bottom:55px;
}


/* PHẦN FEEDBACK HÌNH ẢNH */

.feedback-images-head{
  display:flex;

  align-items:end;

  justify-content:space-between;

  gap:24px;

  margin-bottom:22px;
}

.feedback-images-head h3{
  margin:0;

  font-family:
    "Be Vietnam Pro",
    sans-serif;

  font-size:24px;

  font-weight:700;

  color:#ffffff;
}

.feedback-images-head p{
  margin:7px 0 0;

  color:#8497aa;

  font-size:14px;

  line-height:1.6;
}


/* GALLERY PREVIEW */

.feedback-preview{
  display:grid;

  grid-template-columns:
    repeat(3,1fr);

  gap:18px;
}

.feedback-image-card{
  padding:0;

  aspect-ratio:4/3;

  overflow:hidden;

  cursor:pointer;

  border:
    1px solid
    rgba(255,255,255,.09);

  border-radius:12px;

  background:#0a1623;
}

.feedback-image-card img{
  width:100%;
  height:100%;

  display:block;

  object-fit:cover;

  transition:
    transform .35s ease,
    filter .35s ease;
}

.feedback-image-card:hover img{
  transform:scale(1.035);

  filter:brightness(.86);
}


/* NÚT XEM THÊM */

.btn-small{
  min-height:40px;

  padding:0 16px;

  font-size:11px;
}
.feedback .section-head h2{
  max-width:none;
  white-space:nowrap;

  font-size:clamp(
    32px,
    3.4vw,
    48px
  );
}
/* REGISTER + CONTACT */
.register-section{padding:100px 0 110px;background:#02060b}
.register-shell{
  display:grid;grid-template-columns:1fr .92fr;gap:26px;
  padding:34px;border-radius:18px;background:
    linear-gradient(90deg,rgba(0,174,234,.08),transparent 52%),#08131f;
  border:1px solid rgba(0,174,234,.18)
}
.register-copy{padding:18px 10px 18px 8px}
.register-copy h2{
  font-family:"Be Vietnam Pro",sans-serif;font-size:clamp(30px,3.2vw,42px);
  line-height:1.18;letter-spacing:-.035em;margin:0 0 15px;font-weight:800
}
.register-copy h2 span{color:var(--cyan2)}
.register-copy p{margin:0;color:#93a4b8;line-height:1.7;font-size:14px;max-width:560px}
.cta-limited{
  display:inline-flex;align-items:center;gap:8px;margin-top:17px;padding:9px 13px;
  border-radius:5px;background:rgba(233,41,63,.10);border:1px solid rgba(233,41,63,.34);
  color:#ff7182;font-family:"Be Vietnam Pro",sans-serif;font-size:13px;font-weight:700
}
.cta-limited:before{content:"";width:7px;height:7px;border-radius:50%;background:var(--red);box-shadow:0 0 12px rgba(233,41,63,.75)}

.register-form{
  padding:24px;border-radius:14px;background:#0b1723;border:1px solid rgba(255,255,255,.08)
}
.form-title{font-family:"Be Vietnam Pro",sans-serif;font-size:19px;font-weight:700;margin:0 0 18px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.field{display:block;margin-bottom:12px;color:#98a9ba;font-size:11px;font-weight:600}
.field input{
  width:100%;height:49px;margin-top:7px;border:1px solid rgba(255,255,255,.10);
  border-radius:7px;background:#07111b;color:#fff;padding:0 13px;outline:none
}
.field input:focus{border-color:var(--cyan)}
.register-form .btn{width:100%;margin-top:4px}
.form-status{margin-top:12px;font-size:12px;line-height:1.5}
.form-status.success{color:var(--green)}
.form-status.error{color:#ff7182}
.form-status.warning{color:#f2c76d}

/* CONTACT */

.contact-panel{
  margin-top:32px;

  display:grid;

  grid-template-columns:
    1fr
    1.15fr;

  gap:24px;

  padding:28px;

  border-radius:16px;

  background:#06101a;

  border:
    1px solid
    rgba(255,255,255,.08);
}


/* LEFT SIDE */

.contact-main{
  display:flex;

  flex-direction:column;

  justify-content:center;

  padding:10px 8px;
}


.contact-title{
  margin:0 0 10px;

  font-family:
    "Be Vietnam Pro",
    sans-serif;

  font-size:24px;

  font-weight:700;

  color:#ffffff;
}


.contact-copy{
  margin:0 0 24px;

  max-width:520px;

  color:#8193a6;

  font-size:14px;

  line-height:1.7;
}


/* ICON BUTTONS */

.contact-actions{
  display:flex;

  gap:12px;

  align-items:center;
}
.contact-phone{
  height:52px;
  padding:0 18px;

  display:inline-flex;
  align-items:center;
  gap:10px;

  border-radius:26px;

  background:#0b1825;

  border:1px solid rgba(255,255,255,.10);

  font-family:"Be Vietnam Pro",sans-serif;
  font-size:14px;
  font-weight:700;

  color:#ffffff;

  transition:.25s ease;
}

.contact-phone svg{
  width:20px;
  height:20px;
  fill:#ffffff;
}

.contact-phone:hover{
  transform:translateY(-3px);

  border-color:rgba(0,174,234,.50);

  background:rgba(0,174,234,.12);
}

.contact-icon-btn{
  width:52px;

  height:52px;

  border-radius:50%;

  display:grid;

  place-items:center;

  cursor:pointer;

  background:#0b1825;

  border:
    1px solid
    rgba(255,255,255,.10);

  transition:
    transform .25s ease,
    border-color .25s ease,
    background .25s ease;
}


.contact-icon-btn svg{
  width:21px;

  height:21px;

  fill:#ffffff;
}


.contact-icon-btn:hover{
  transform:
    translateY(-3px);

  border-color:
    rgba(0,174,234,.50);

  background:
    rgba(0,174,234,.12);
}


/* ZALO CARD */

.zalo-card{
  display:grid;

  grid-template-columns:
    1fr
    auto;

  gap:28px;

  align-items:center;

  padding:24px 26px;

  border-radius:14px;

  background:
    linear-gradient(
      135deg,
      rgba(0,174,234,.10),
      rgba(0,174,234,.03)
    );

  border:
    1px solid
    rgba(0,174,234,.22);
}


.zalo-copy{
  display:flex;

  flex-direction:column;

  align-items:flex-start;
}


.zalo-kicker{
  margin-bottom:8px;

  font-family:
    "Be Vietnam Pro",
    sans-serif;

  font-size:10px;

  font-weight:700;

  letter-spacing:.14em;

  color:var(--cyan2);
}


.zalo-copy strong{
  max-width:280px;

  font-family:
    "Be Vietnam Pro",
    sans-serif;

  font-size:18px;

  line-height:1.4;

  color:#ffffff;
}


.zalo-button{
  margin-top:18px;

  min-height:40px;

  padding:0 16px;

  display:inline-flex;

  align-items:center;

  justify-content:center;

  border-radius:6px;

  background:
    linear-gradient(
      135deg,
      var(--cyan),
      #087fd6
    );

  color:#ffffff;

  font-family:
    "Be Vietnam Pro",
    sans-serif;

  font-size:11px;

  font-weight:700;

  transition:.25s ease;
}


.zalo-button:hover{
  transform:
    translateY(-2px);

  box-shadow:
    0 8px 25px
    rgba(0,174,234,.20);
}


.zalo-card img{
  width:125px;

  height:125px;

  object-fit:contain;

  padding:6px;

  border-radius:10px;

  background:#ffffff;
}

/* FOOTER */
footer{padding:24px 0 36px;border-top:1px solid rgba(255,255,255,.07);color:#56677a;font-size:10px;background:#02060b}
footer .wrap{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap}

@media(max-width:1000px){
  .work-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:900px){
  .hero{padding-top:45px}
  .hero-grid{grid-template-columns:1fr}
  .hero-main-logo{max-width:650px}
  .hero-photo{min-height:520px}
  .section-head{display:block}
  .section-head p{margin-top:14px}
  .video-grid{grid-template-columns:1fr}
  .feedback-video-grid{grid-template-columns:1fr}
  .feedback-preview{grid-template-columns:repeat(2,1fr)}
  .register-shell{grid-template-columns:1fr}
  .contact-panel{grid-template-columns:1fr}
}
@media(max-width:620px){
  .wrap{width:min(var(--max),calc(100% - 24px))}
  .hero{min-height:auto;padding:35px 0 65px}
  .hero-main-logo{width:100%;max-width:none;margin-bottom:25px}
  .hero-copy{font-size:16px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .hero-photo{min-height:500px}
  .photo-cap{left:20px;right:20px;bottom:20px}
  .quanmax-name{font-size:24px}
  .quanmax-tagline{font-size:14px}
  .quanmax-bio{font-size:13px;line-height:1.6}
  .section-head h2{font-size:32px}
  .feedback .section-head h2{
  white-space:normal;
  font-size:32px;
}

.feedback .section-sub{
  font-size:14px;
}

.feedback-video-grid{
  gap:14px;
}

.feedback-images-head{
  display:block;
}

.feedback-images-head .btn{
  margin-top:14px;
}
  .work-grid{grid-template-columns:1fr}
  .feedback-preview{grid-template-columns:1fr 1fr;gap:10px}
  .feedback-images-head{display:block}
  .feedback-images-head .btn{margin-top:13px}
  .form-row{grid-template-columns:1fr}
  .register-shell{padding:20px}
  .register-form{padding:18px}
  .contact-links{grid-template-columns:1fr}
  .zalo-card{align-items:flex-start}
  .zalo-card img{width:100px;height:100px}
}

/* ========================================
   GLOBAL FONT SIZE +2PX
======================================== */

/* BUTTON */
.btn{
  font-size:14px;
}

/* HERO */
.hero-copy{
  font-size:20px;
}

.quanmax-name{
  font-size:28px;
}

.quanmax-tagline{
  font-size:17px;
}

.quanmax-bio{
  font-size:16px;
}

/* SECTION TITLES */
.section-head h2{
  font-size:clamp(36px,4.1vw,56px);
}

.section-head p{
  font-size:15px;
}

.section-sub{
  font-size:15px;
}

/* VIDEO */
.video-placeholder small{
  font-size:12px;
}

/* PROJECT */
.project-overlay span{
  font-size:10px;
}

.project-overlay strong{
  font-size:16px;
}

/* GALLERY */
.gallery-modal h3{
  font-size:32px;
}

/* FEEDBACK */
.feedback .section-head h2{
  font-size:clamp(34px,3.4vw,50px);
}

.feedback .section-sub{
  font-size:18px;
}

.feedback-images-head h3{
  font-size:26px;
}

.feedback-images-head p{
  font-size:16px;
}

.btn-small{
  font-size:13px;
}

/* REGISTER */
.register-copy h2{
  font-size:clamp(30px,3.2vw,42px);
  line-height:1.3;
}

.register-copy p{
  font-size:16px;
}

.cta-limited{
  font-size:15px;
}

.form-title{
  font-size:21px;
}

.field{
  font-size:13px;
}

.form-status{
  font-size:14px;
}

/* CONTACT */
.contact-title{
  font-size:26px;
}

.contact-copy{
  font-size:16px;
}

.contact-phone{
  font-size:16px;
}

.zalo-kicker{
  font-size:12px;
}

.zalo-copy strong{
  font-size:20px;
}

.zalo-button{
  font-size:13px;
}

/* FOOTER */
footer{
  font-size:12px;
}


/* MOBILE +2PX */
@media(max-width:620px){

  .hero-copy{
    font-size:18px;
  }

  .quanmax-name{
    font-size:26px;
  }

  .quanmax-tagline{
    font-size:16px;
  }

  .quanmax-bio{
    font-size:15px;
  }

  .section-head h2{
    font-size:34px;
  }

  .feedback .section-head h2{
    font-size:34px;
  }

  .feedback .section-sub{
    font-size:16px;
  }

}