:root {
      --black:        #0A0A0A;
      --black-soft:   #141414;
      --black-mid:    #1E1E1E;
      --black-card:   #252525;
      --white:        #FFFFFF;
      --white-off:    #F8F8F8;
      --white-dim:    #EFEFEF;
      --white-border: #E2E2E2;
      --orange:       #F29829;
      --orange-bright:#FFAD3A;
      --orange-deep:  #D4820A;
      --orange-muted: rgba(242,152,41,0.10);
      --orange-border:rgba(242,152,41,0.35);
      --font-d: 'Montserrat', sans-serif;
      --font-b: 'Lexend', sans-serif;
      --font-m: 'IBM Plex Mono', monospace;
      --sh-or: 0 8px 32px rgba(242,152,41,0.28);
      --sh-bk: 0 4px 20px rgba(0,0,0,0.10);
      --r-sm:4px; --r-md:8px; --r-lg:16px; --r-xl:24px; --r-pill:999px;
    }
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: var(--font-b);
      background: var(--white);
      color: var(--black);
      line-height: 1.6;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    /* ── NAV — floating pill, stays legible over light and dark sections alike ── */
    nav {
      position: fixed; top: 18px; left: 50%; transform: translateX(-50%); z-index: 200;
      display: flex; align-items: center; justify-content: space-between;
      gap: 36px;
      width: calc(100% - 40px); max-width: 1160px;
      padding: 9px 12px 9px 22px;
      background: rgba(10,10,10,0.92);
      backdrop-filter: blur(16px);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: var(--r-pill);
      box-shadow: 0 14px 40px rgba(10,10,10,0.16);
      transition: background 0.3s, box-shadow 0.3s, top 0.3s;
    }
    .nav-logo {
      font-family: var(--font-d); font-weight: 900;
      font-size: 18px; letter-spacing: 0.05em;
      color: var(--white); text-decoration: none;
    }
    .nav-logo em { color: var(--orange); font-style: normal; }
    .nav-links { display: flex; gap: 32px; list-style: none; }
    .nav-links a {
      font-family: var(--font-m); font-size: 10px;
      letter-spacing: 0.16em; text-transform: uppercase;
      color: rgba(255,255,255,0.5); text-decoration: none;
      transition: color 0.2s;
    }
    .nav-links a:hover { color: var(--orange); }
    .nav-cta {
      font-family: var(--font-d); font-weight: 800; font-size: 11px;
      letter-spacing: 0.06em; text-transform: uppercase;
      background: var(--orange); color: var(--white);
      border: none; border-radius: var(--r-pill);
      padding: 10px 22px; cursor: pointer; text-decoration: none;
      transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
    }
    .nav-cta:hover { background: var(--orange-bright); transform: translateY(-1px); box-shadow: var(--sh-or); }
/* CTA mặc định:
   Desktop dùng .nav-cta
   Mobile dùng .mobile-menu-cta
*/
.mobile-menu-cta {
  display: none;
}
    /* ── HERO ── */
    #hero {
      position: relative;
      height: 100vh; min-height: 600px;
      display: flex; flex-direction: column;
      justify-content: center; align-items: center;
      overflow: hidden; background: var(--black);
      text-align: center;
    }

    /* ── BG image layer — slow Ken Burns zoom ── */
    .hero-bg-img {
      position: absolute; inset: -6%; /* oversize so zoom doesn't show edges */
 
      background-size: cover;
      background-position: center 40%;
      animation: heroBgZoom 18s ease-in-out infinite alternate;
      will-change: transform;
    }


    /* ── gradient overlays stacked ── */
    /* layer 1: darken overall so text reads clearly */
    .hero-overlay-dark {
      position: absolute; inset: 0;
      background: rgba(8, 5, 2, 0.45);
    }
    /* layer 2: bottom gradient — text comfort zone */
    .hero-overlay-bottom {
      position: absolute; inset: 0;
      background: linear-gradient(
        to top,
        rgba(10,10,10,0.92) 0%,
        rgba(10,10,10,0.45) 35%,
        rgba(10,10,10,0.10) 65%,
        transparent 100%
      );
    }
    /* layer 3: subtle orange warm tint at top-right (matches the image's sky) */
    .hero-overlay-warm {
      position: absolute; inset: 0;
      background: radial-gradient(
        ellipse 70% 55% at 60% 20%,
        rgba(200, 100, 10, 0.18) 0%,
        transparent 70%
      );
      mix-blend-mode: screen;
    }

    /* ── content sits above all overlays ── */
    .hero-content {
      position: relative; z-index: 10;
      display: flex; flex-direction: column;
      align-items: center; text-align: center;
      padding: 0 24px;
    }

    /* eyebrow */
    .hero-eyebrow {
      font-family: var(--font-m); font-size: 11px;
      letter-spacing: 0.28em; text-transform: uppercase;
      color: var(--orange); margin-bottom: 28px;
      display: flex; align-items: center; gap: 14px;
      opacity: 0; animation: fadeUp 0.7s cubic-bezier(0.16,1,0.3,1) forwards 0.3s;
      /* subtle drop shadow so it reads over bright areas */
      text-shadow: 0 2px 12px rgba(0,0,0,0.6);
    }
    .hero-eyebrow::before,
    .hero-eyebrow::after {
      content: ''; flex: 0 0 28px; height: 1px; background: var(--orange); opacity: 0.7;
    }

    /* ── TITLE — big cinematic treatment ── */
    .hero-title {
      font-family: var(--font-d); font-weight: 900;
      font-size: clamp(64px, 11vw, 148px);
      line-height: 0.90; letter-spacing: -0.03em;
      color: var(--white); margin-bottom: 0;
      /* multi-layer text shadow: crisp edge + soft glow */
      text-shadow:
        0 2px 0   rgba(0,0,0,0.9),
        0 4px 16px rgba(0,0,0,0.7),
        0 0  48px  rgba(0,0,0,0.4);
    }

    /* Each line animates in independently */
    .hero-title .tl {
      display: block;
      opacity: 0;
      animation: slideInWord 0.9s cubic-bezier(0.16,1,0.3,1) forwards;
      will-change: transform, opacity;
    }
    .hero-title .tl-1 { animation-delay: 0.45s; }
    .hero-title .tl-2 { animation-delay: 0.65s; color: var(--orange); }
    .hero-title .tl-3 { animation-delay: 0.85s; }

    @keyframes slideInWord {
      from { opacity: 0; transform: translateY(40px) scaleY(0.85); filter: blur(6px); }
      to   { opacity: 1; transform: translateY(0)   scaleY(1);    filter: blur(0);   }
    }

    /* ── divider line between title and subtitle ── */
    .hero-divider {
      width: 0; height: 1px;
      background: linear-gradient(to right, transparent, rgba(242,152,41,0.7), transparent);
      margin: 28px auto;
      opacity: 0;
      animation: expandLine 0.8s cubic-bezier(0.16,1,0.3,1) forwards 1.05s;
    }
    @keyframes expandLine {
      from { width: 0; opacity: 0; }
      to   { width: 280px; opacity: 1; }
    }

    /* subtitle */
    .hero-sub {
      font-family: var(--font-b); font-size: clamp(15px, 1.8vw, 18px);
      color: rgba(255,255,255,0.75); max-width: 460px;
      line-height: 1.75; margin-bottom: 40px;
      text-shadow: 0 2px 10px rgba(0,0,0,0.7);
      opacity: 0; animation: fadeUp 0.8s cubic-bezier(0.16,1,0.3,1) forwards 1.1s;
    }

    /* buttons */
    .hero-btns {
      display: flex; gap: 14px; flex-wrap: wrap; justify-content: center;
      opacity: 0; animation: fadeUp 0.8s cubic-bezier(0.16,1,0.3,1) forwards 1.3s;
    }

    /* ── scroll indicator — bottom center ── */
    .hero-scroll {
      position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
      display: flex; flex-direction: column; align-items: center; gap: 8px;
      opacity: 0; animation: fadeUp 0.8s ease forwards 1.8s;
      z-index: 10;
    }
    .hero-scroll-label {
      font-family: var(--font-m); font-size: 9px;
      letter-spacing: 0.26em; text-transform: uppercase;
      color: rgba(255,255,255,0.30);
    }
    .scroll-line {
      width: 1px; height: 44px;
      background: linear-gradient(to bottom, var(--orange), transparent);
      animation: sPulse 2.2s ease-in-out infinite;
    }
    @keyframes sPulse { 0%,100%{opacity:0.3;} 50%{opacity:1;} }

    /* ── shared entrance animations ── */
    @keyframes fadeUp {
      from { opacity:0; transform:translateY(18px); }
      to   { opacity:1; transform:translateY(0); }
    }

    /* ── BUTTONS ── */
    .btn {
      font-family: var(--font-d); font-weight: 800; font-size: 12px;
      letter-spacing: 0.06em; text-transform: uppercase;
      border: none; border-radius: var(--r-pill);
      cursor: pointer; display: inline-flex; align-items: center; gap: 8px;
      text-decoration: none; transition: all 0.22s; padding: 14px 30px;
    }
    .btn-primary { background: var(--orange); color: var(--white); }
    .btn-primary:hover { background: var(--orange-bright); transform:translateY(-2px); box-shadow: var(--sh-or); }
    .btn-ghost { background: transparent; color: rgba(255,255,255,0.6); border: 1.5px solid rgba(255,255,255,0.2); }
    .btn-ghost:hover { color: var(--orange); border-color: var(--orange-border); }
    .btn-outline { background: transparent; color: var(--orange); border: 1.5px solid var(--orange); }
    .btn-outline:hover { background: var(--orange-muted); }
    .btn-dark { background: var(--black); color: var(--white); }
    .btn-dark:hover { background: var(--black-mid); transform:translateY(-2px); box-shadow:0 8px 24px rgba(0,0,0,0.22); }

    /* ── MARQUEE ── */
    .marquee-wrap { background: var(--orange); padding: 14px 0; overflow: hidden; }
    .marquee-track {
      display: flex; width: max-content;
      animation: marquee 22s linear infinite;
    }
    .marquee-item {
      font-family: var(--font-d); font-size: 12px; font-weight: 800;
      letter-spacing: 0.12em; text-transform: uppercase; color: var(--black);
      white-space: nowrap; flex-shrink: 0; padding: 0 28px;
      display: inline-flex; align-items: center;
    }
    .marquee-sep { flex-shrink: 0; color: var(--black); opacity: 0.35; font-size: 9px; padding: 0 4px; }
    @keyframes marquee { from{transform:translateX(0);} to{transform:translateX(-50%);} }

    /* ── SECTIONS ── */
    .sec { padding: 100px 64px; }
    .sec-dark  { background: var(--black); }
    .sec-off   { background: var(--white-off); }
    .sec-white { background: var(--white); }
    .inner { max-width: 1160px; margin: 0 auto; }

    .slabel {
      font-family: var(--font-m); font-size: 10px;
      letter-spacing: 0.22em; text-transform: uppercase;
      color: var(--orange); margin-bottom: 12px;
      display: flex; align-items: center; gap: 12px;
    }
    .slabel::before { content:''; width:28px; height:1px; background:var(--orange); }
    .slabel-center { justify-content: center; }
    .slabel-center::before { display: none; }

    .stitle {
      font-family: var(--font-d); font-weight: 900;
      font-size: clamp(28px, 4vw, 50px);
      line-height: 1.05; letter-spacing: -0.015em; margin-bottom: 18px;
    }
    .stitle-w { color: var(--white); }
    .stitle-k { color: var(--black); }
    .stitle em { color: var(--orange); font-style: normal; }
    .sdesc {
      font-size: 16px; line-height: 1.8; max-width: 580px;
      font-family: var(--font-b); margin-bottom: 40px;
    }
    .sdesc-w { color: rgba(255,255,255,0.55); }
    .sdesc-w strong { color: var(--white); }
    .sdesc-k { color: #3a3a3a; }
    .sdesc-k strong { color: var(--black); }
    .o-bar { width: 36px; height: 3px; background: var(--orange); border-radius: 2px; margin-bottom: 20px; }

    /* ── ABOUT ── */
    .about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
    .about-visual { position: relative; }
    .about-img-ph {
      width: 100%; aspect-ratio: 4/3; border-radius: var(--r-lg);
      background: linear-gradient(135deg, #1a0d00 0%, #1e1e1e 100%);
      border: 1px solid rgba(242,152,41,0.13);
      display: flex; flex-direction: column;
      align-items: center; justify-content: center; gap: 14px;
    }
    .about-badge {
      position: absolute; bottom: -20px; right: -20px;
      width: 110px; height: 110px; background: var(--orange);
      border-radius: 50%; border: 4px solid var(--black);
      display: flex; flex-direction: column;
      align-items: center; justify-content: center; text-align: center;
      font-family: var(--font-d); font-size: 10px; font-weight: 800;
      letter-spacing: 0.04em; text-transform: uppercase; color: var(--white);
      line-height: 1.4;
    }
    .about-points { margin-top: 32px; display: flex; flex-direction: column; gap: 16px; }
    .about-point { display: flex; gap: 14px; align-items: flex-start; }
    .pt-icon {
      width: 38px; height: 38px; border-radius: var(--r-md);
      background: var(--white); border: 1px solid var(--orange-border);
      box-shadow: var(--sh-bk);
      flex-shrink: 0; display: flex; align-items: center; justify-content: center; font-size: 17px;
    }
    .pt-body h4 {
      font-family: var(--font-d); font-weight: 700; font-size: 14px;
      color: var(--white); margin-bottom: 3px;
    }
    .pt-body p { font-size: 13px; color: rgba(255,255,255,0.55); line-height: 1.6; font-family: var(--font-b); }

    /* ── QUOTE LIGHT ── */
    .quote-light {
      padding: 72px 64px; background: var(--white);
      border-top: 1px solid var(--white-border); border-bottom: 1px solid var(--white-border);
      text-align: center;
    }
    .ql-inner { max-width: 800px; margin: 0 auto; }
    .ql-mark { font-family: var(--font-b); font-size: 90px; color: var(--orange); line-height: 0.4; display: block; margin-bottom: 16px; opacity: 0.28; }
    .ql-text { font-family: var(--font-b); font-weight: 500; font-size: clamp(20px, 2.8vw, 30px); line-height: 1.45; color: var(--black); margin-bottom: 10px; }
    .ql-sub  { font-family: var(--font-b); font-weight: 500; font-size: clamp(18px, 2.4vw, 26px); color: var(--orange); line-height: 1.4; }

    /* ── AUDIENCE ── */
    .aud-hd { text-align: center; margin-bottom: 60px; }
    .aud-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
    .aud-card {
      border-radius: var(--r-lg); overflow: hidden; position: relative;
      aspect-ratio: 3/4; cursor: default;
      border: 1px solid rgba(255,255,255,0.05);
      transition: transform 0.3s, box-shadow 0.3s;
    }
    .aud-card:hover { transform: translateY(-6px); box-shadow: 0 24px 60px rgba(0,0,0,0.4), var(--sh-or); }
    .ac-bg {
      position: absolute; inset: 0;
      display: flex; flex-direction: column;
      align-items: center; justify-content: center; gap: 10px;
    }
    .ac-bg-1 { background: linear-gradient(155deg, #1c0e02 0%, #0d0d0d 100%); }
    .ac-bg-2 { background: linear-gradient(155deg, #0a1000 0%, #0d0d0d 100%); }
    .ac-bg-3 { background: linear-gradient(155deg, #000a14 0%, #0d0d0d 100%); }
    .ac-overlay {
      position: absolute; inset: 0;
      background: linear-gradient(to top, rgba(10,10,10,0.96) 0%, rgba(10,10,10,0.18) 55%, transparent 100%);
    }
    .ac-content { position: absolute; bottom: 0; left: 0; right: 0; padding: 28px; }
    .ac-badge {
      font-family: var(--font-m); font-size: 9px;
      letter-spacing: 0.18em; text-transform: uppercase;
      color: var(--orange); margin-bottom: 8px; display: block;
    }
    .ac-title { font-family: var(--font-d); font-weight: 800; font-size: 22px; color: var(--white); margin-bottom: 10px; line-height: 1.2; }
    .ac-desc { font-family: var(--font-b); font-size: 13px; color: rgba(255,255,255,0.52); line-height: 1.65; }
    .ac-desc em { color: var(--orange); font-style: normal; }

    /* ── PILLARS ── */
    .pillars-hd { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: end; margin-bottom: 60px; }
    .pillars-img-ph {
      width: 100%; aspect-ratio: 16/10; border-radius: var(--r-lg);
      background: linear-gradient(135deg, #0e0e0e 0%, #1c1c1c 100%);
      border: 1px solid rgba(242,152,41,0.10);
      display: flex; flex-direction: column;
      align-items: center; justify-content: center; gap: 12px;
    }
    .pillars-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .pillar-card {
      background: var(--orange); border: none;
      border-radius: var(--r-lg); padding: 32px;
      transition: border-color 0.25s, box-shadow 0.25s; box-shadow: 0 4px 24px rgba(242,152,41,0.25);
    }
    .pillar-card:hover { box-shadow: 0 8px 40px rgba(242,152,41,0.4); transform: translateY(-4px); }
    .pillar-num { font-family: var(--font-d); font-size: 44px; font-weight: 900; color: rgba(0,0,0,0.15); line-height: 1; margin-bottom: 12px; }
    .pillar-title { font-family: 'Montserrat', var(--font-d); font-weight: 900; font-size: 24px; color: #0A0A0A; margin-bottom: 10px; }
    .pillar-en { display: block; font-family: 'Montserrat', var(--font-d); font-weight: 400; font-size: 18px; color: rgba(0,0,0,0.5); margin-top: 2px; }
    .pillar-desc { font-family: var(--font-b); font-size: 13px; color: rgba(0,0,0,0.65); line-height: 1.7; }

    /* ── COURSE ── */
    .course-grid { display: grid; grid-template-columns: 5fr 7fr; gap: 72px; align-items: start; }
    .course-name {
      font-family: var(--font-d); font-weight: 900;
      font-size: clamp(40px, 5.5vw, 72px); line-height: 0.9;
      letter-spacing: -0.03em; color: var(--white); margin-bottom: 4px;
    }
    .course-name em { color: var(--orange); font-style: normal; display: block; }
    .course-sub {
      font-family: var(--font-b); font-size: 15px; font-weight: 500;
      color: rgba(10,10,10,0.45); line-height: 1.7; margin-bottom: 32px;
    }
    .pquote {
      border-left: 3px solid var(--orange);
      padding: 14px 18px;
      font-family: var(--font-b); font-weight: 500;
      font-size: 17px; line-height: 1.55;
      color: rgba(255,255,255,0.85);
      background: var(--orange-muted);
      border-radius: 0 var(--r-md) var(--r-md) 0;
      margin-bottom: 36px;
    }
    .feat-list { display: flex; flex-direction: column; gap: 4px; }
    .feat-item {
      display: flex; gap: 18px; align-items: flex-start;
      padding: 22px 24px; border-radius: var(--r-md);
      background: var(--white); border: 1.5px solid var(--white-border);
      box-shadow: var(--sh-bk);
      transition: background 0.25s, border-color 0.25s, transform .25s;
    }
    .feat-item:hover { background: #FEF5EA; border-color: var(--orange-border); transform: translateY(-2px); }
    .feat-icon {
      width: 42px; height: 42px; flex-shrink: 0;
      background: var(--orange-muted); border: 1px solid var(--orange-border);
      border-radius: var(--r-md); display: flex; align-items: center; justify-content: center; font-size: 18px;
    }
    .feat-body h4 { font-family: var(--font-d); font-weight: 700; font-size: 15px; color: var(--black); margin-bottom: 4px; }
    .feat-body p { font-family: var(--font-b); font-size: 13px; color: rgba(10,10,10,0.55); line-height: 1.65; }
    .feat-body p em { color: var(--orange); font-style: normal; }

    /* ── QUOTE LIGHT (used between light sections) ── */
    .quote-dark, .quote-light {
      padding: 80px 64px; background: var(--white);
      border-top: 1px solid var(--white-border); border-bottom: 1px solid var(--white-border);
      text-align: center;
    }
    .qd-inner { max-width: 820px; margin: 0 auto; }
    .qd-text {
      font-family: var(--font-b); font-weight: 500;
      font-size: clamp(20px, 2.7vw, 29px); line-height: 1.5;
      color: rgba(10,10,10,0.82);
    }
    .qd-text em { color: var(--orange); font-style: normal; }
    .qd-attr {
      font-family: var(--font-m); font-size: 10px;
      letter-spacing: 0.18em; text-transform: uppercase;
      color: var(--orange-deep); margin-top: 22px;
    }

    /* ── TEAM ── */
    .team-hd { text-align: center; margin-bottom: 64px; }
    .team-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
/* TEAM - 2 members centered */

.team-grid-two{
    grid-template-columns:repeat(2,1fr);
    max-width:700px;
    margin:0 auto;
}
    .team-card {
      background: var(--white); border: 1.5px solid var(--white-border);
      border-radius: var(--r-xl); padding: 40px 28px;
      text-align: center; box-shadow: var(--sh-bk);
      transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s;
    }
    .team-card:hover { border-color: var(--orange-border); box-shadow: var(--sh-or); transform: translateY(-4px); }
    .team-photo {
      width: 120px; height: 120px; border-radius: 50%;
      background: linear-gradient(135deg, #1c0e02, #252525);
      border: 3px solid var(--orange-border);
      margin: 0 auto 20px;
      display: flex; align-items: center; justify-content: center;
    }
    .team-photo-ph { display: flex; flex-direction: column; align-items: center; justify-content: center; }
    .team-name { font-family: var(--font-d); font-weight: 800; font-size: 19px; color: var(--black); margin-bottom: 6px; }
    .team-role { font-family: var(--font-m); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--orange); }
    .team-tag {
      display: inline-block; margin-top: 14px;
      font-family: var(--font-m); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase;
      background: var(--orange-muted); color: var(--orange-deep);
      border: 1px solid var(--orange-border); border-radius: var(--r-pill); padding: 4px 12px;
    }
/* ── CONTACT ── */

    .cinfo-list { display: flex; flex-direction: column; gap: 20px; margin-top: 32px; }
    .cinfo-item { display: flex; flex-direction: column; gap: 3px; }
    .ci-label { font-family: var(--font-m); font-size: 9px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--orange); }
    .ci-val { font-size: 15px; color: var(--black); font-family: var(--font-b); }
    .ci-val a { color: var(--black); text-decoration: none; transition: color 0.2s; }
    .ci-val a:hover { color: var(--orange); }

    .contact-form { display: flex; flex-direction: column; gap: 16px; }
    .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    .fgrp { display: flex; flex-direction: column; gap: 6px; }
    .fgrp label { font-family: var(--font-m); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: #1a1a1a; }
    .fgrp input, .fgrp textarea {
      font-family: var(--font-b); font-size: 15px; color: var(--black);
      background: var(--white); border: 1.5px solid var(--white-border);
      border-radius: var(--r-md); padding: 12px 14px; outline: none;
      transition: border-color 0.2s, box-shadow 0.2s; resize: none;
    }
    .fgrp input::placeholder, .fgrp textarea::placeholder { color: rgba(0,0,0,0.2); }
    .fgrp input:focus, .fgrp textarea:focus { border-color: var(--orange); box-shadow: 0 0 0 3px var(--orange-muted); }
    .fgrp textarea { min-height: 130px; }

    .featured { padding: 48px 64px; background: var(--white-off); border-top: 1px solid var(--white-border); border-bottom: 1px solid var(--white-border); }
    .featured-inner {
      max-width: 1160px; margin: 0 auto;
      display: flex; align-items: center; gap: 36px; flex-wrap: wrap;
    }
    .feat-label { font-family: var(--font-m); font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase; color: rgba(10,10,10,0.32); white-space: nowrap; }
    .feat-sep { width: 1px; height: 28px; background: rgba(10,10,10,0.12); }
    .feat-logos { display: flex; gap: 32px; align-items: center; flex-wrap: wrap; }
    .feat-logo-ph { height: 26px; background: rgba(10,10,10,0.06); border-radius: 4px; }
    .feat-logo-link { display: inline-flex; align-items: center; opacity: 0.7; filter: grayscale(1); transition: opacity 0.2s, filter 0.2s; }
    .feat-logo-link:hover { opacity: 1; filter: grayscale(0); }

    /* ── FOOTER ── */
    footer { background: var(--black); border-top: 1px solid rgba(255,255,255,0.07); padding: 64px; }
    .footer-inner {
      max-width: 1160px; margin: 0 auto;
      display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 60px; margin-bottom: 48px;
    }
    .footer-brand { font-family: var(--font-d); font-weight: 900; font-size: 22px; letter-spacing: 0.04em; color: var(--white); margin-bottom: 14px; }
    .footer-brand em { color: var(--orange); font-style: normal; }
    .footer-tagline { font-family: var(--font-b); font-size: 14px; color: rgba(255,255,255,0.5); line-height: 1.7; max-width: 300px; margin-bottom: 24px; }
    .footer-legal { font-family: var(--font-m); font-size: 11px; color: rgba(255,255,255,0.55); line-height: 2; letter-spacing: 0.04em; }
    .footer-col h5 { font-family: var(--font-m); font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--orange); margin-bottom: 20px; }
    .footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 12px; }
    .footer-col ul li a { font-family: var(--font-b); font-size: 14px; color: rgba(255,255,255,0.4); text-decoration: none; transition: color 0.2s; }
    .footer-col ul li a:hover { color: var(--orange); }
    .footer-bottom {
      max-width: 1160px; margin: 0 auto;
      display: flex; align-items: center; justify-content: space-between;
      border-top: 1px solid rgba(255,255,255,0.06); padding-top: 28px;
      flex-wrap: wrap; gap: 12px;
    }
    .footer-copy { font-family: var(--font-m); font-size: 10px; color: rgba(255,255,255,0.2); letter-spacing: 0.08em; }
    .footer-links { display: flex; gap: 24px; }
    .footer-links a { font-family: var(--font-m); font-size: 10px; letter-spacing: 0.1em; color: rgba(255,255,255,0.2); text-decoration: none; transition: color 0.2s; }
    .footer-links a:hover { color: var(--orange); }

    /* ── REVEAL ── */
    .reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    .delay-1 { transition-delay: 0.1s; }
    .delay-2 { transition-delay: 0.2s; }
    .delay-3 { transition-delay: 0.3s; }
    .delay-4 { transition-delay: 0.4s; }

    /* ── RESPONSIVE ── */

    @media (max-width: 960px) {

      /* Navigation */
      nav {
        padding: 9px 10px 9px 18px;
        width: calc(100% - 24px);
        top: 12px;
      }

      .nav-links {
        display: none;
      }

      .nav-cta {
        display: none;
      }

      .mobile-menu-btn {
        display: flex;
      }

      /* Hamburger */
      .mobile-menu-btn {
        display: flex;
      }

      /* Mobile menu panel */
      #main-nav > .nav-links.open {
        display: flex !important;
        position: fixed;
        top: 78px;
        right: 16px;
        left: auto;
        width: min(300px, calc(100vw - 32px));
        max-width: 300px;
        box-sizing: border-box;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        padding: 14px;
        /* 50% transparent black panel */
        background: rgba(10, 10, 10, 0.50);
        backdrop-filter: blur(18px);
        -webkit-backdrop-filter: blur(18px);
        border: 1px solid rgba(255, 255, 255, 0.14);
        border-radius: 20px;
        box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
        z-index: 10000;
      }

      #main-nav > .nav-links.open li {
        width: 100%;
        display: block;
      }

      #main-nav > .nav-links.open li a {
        display: flex;
        align-items: center;
        width: 100%;
        min-height: 48px;
        box-sizing: border-box;
        padding: 13px 16px;
        font-family: var(--font-m);
        font-size: 11px;
        font-weight: 500;
        letter-spacing: 0.14em;
        line-height: 1.3;
        color: rgba(255, 255, 255, 0.78);
        text-decoration: none;
        white-space: nowrap;
        border-radius: 10px;
      }

      #main-nav > .nav-links.open li a:hover {
        color: var(--orange);
        background: rgba(242, 152, 41, 0.08);
      }

      #main-nav > .nav-links.open .mobile-menu-cta {
        display: block;
        margin-top: 8px;
        padding-top: 10px;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
      }

      #main-nav > .nav-links.open .mobile-menu-cta a {
        justify-content: center;
        min-height: 44px;
        padding: 12px 16px;
        background: var(--orange);
        color: var(--white);
        font-family: var(--font-d);
        font-size: 11px;
        font-weight: 800;
        letter-spacing: 0.05em;
        border-radius: var(--r-pill);
      }

      #main-nav > .nav-links.open .mobile-menu-cta a:hover {
        background: var(--orange-bright);
        color: var(--white);
      }

      /* Hero */
      #hero {
        min-height: 100svh;
      }

      .hero-title {
        font-size: clamp(52px, 13vw, 88px);
      }

      .hero-eyebrow {
        font-size: 10px;
      }

      .hero-sub {
        font-size: 16px;
        max-width: 340px;
      }

      .hero-divider {
        display: none;
      }

      /* Sections / grids */
      .sec {
        padding: 72px 28px;
      }

      .about-grid,
      .pillars-hd,
      .course-grid,
      .contact-grid {
        grid-template-columns: 1fr;
        gap: 48px;
      }

      .aud-grid,
      .team-grid {
        grid-template-columns: 1fr 1fr;
      }

      .pillars-grid {
        grid-template-columns: 1fr;
      }

      .footer-inner {
        grid-template-columns: 1fr;
      }

      .form-row {
        grid-template-columns: 1fr;
      }

      .featured {
        padding: 32px 24px;
      }

      footer {
        padding: 48px 28px;
      }

      .quote-light,
      .quote-dark {
        padding: 56px 28px;
      }

      /* Audience accordion */
      .aud-acc-header {
        padding: 20px;
      }

      .aud-acc-body {
        padding: 0 20px;
      }

      .aud-acc-item.open .aud-acc-body {
        padding: 0 20px 20px;
      }

      .aud-acc-left .ac-title {
        font-size: 18px;
      }
    }

    @media (max-width: 900px) {

      /* Legacy / alternate hero layouts */
      .hero {
        grid-template-columns: 1fr;
      }

      .hero-body {
        padding: 120px 24px 80px;
      }

      .hero-img {
        display: none;
      }

      .hero-scroll {
        left: 24px;
      }

      .sec {
        padding: 72px 24px;
      }

      .what-grid,
      .method-row,
      .usp-grid {
        grid-template-columns: 1fr;
      }

      /* BEARS SCORE */
      .score-intro-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }

      .score-intro-image {
        order: -1;
      }

      .score-intro-image img {
        max-width: 100%;
      }

      .bears-letters {
        flex-direction: column;
      }

      .bl-item {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      }

      .bl-item:last-child {
        border-bottom: none;
      }

      .cta-wrap {
        padding: 80px 24px;
      }

      .footer-inner {
        grid-template-columns: 1fr;
      }

      .cta-disclaimers {
        flex-direction: column;
        align-items: center;
        gap: 10px;
      }
    }

    @media (max-width: 580px) {

      .aud-grid,
      .team-grid {
        grid-template-columns: 1fr;
      }

      .hero-title {
        font-size: clamp(44px, 14vw, 68px);
      }

      .hero-btns {
        flex-direction: column;
        align-items: center;
      }

      .hero-btns .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
      }

      .team-grid-two {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 390px) {

      .sec {
        padding-left: 20px;
        padding-right: 20px;
      }
    }

    /* Reduce motion for accessibility */
    @media (prefers-reduced-motion: reduce) {

      .hero-bg-img {
        animation: none;
      }

      .tl,
      .hero-eyebrow,
      .hero-divider,
      .hero-sub,
      .hero-btns,
      .hero-scroll {
        animation: none;
        opacity: 1;
        transform: none;
        width: auto;
      }
    }

    /* ── ACCORDION (Audience section) ── */
    .aud-accordion { display: flex; flex-direction: column; gap: 12px; }
    .aud-acc-item {
      background: rgba(255,255,255,0.04);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: var(--r-lg);
      overflow: hidden;
      cursor: pointer;
      transition: border-color 0.25s, background 0.25s;
    }
    .aud-acc-item:hover { border-color: var(--orange-border); background: rgba(242,152,41,0.06); }
    .aud-acc-item.open { border-color: var(--orange-border); background: rgba(242,152,41,0.06); }
    .aud-acc-header {
      display: flex; align-items: center; justify-content: space-between;
      padding: 28px 32px; gap: 20px;
    }
    .aud-acc-left { flex: 1; }
    .aud-acc-left .ac-badge { font-family: var(--font-m); font-size: 9px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--orange); display: block; margin-bottom: 6px; }
    .aud-acc-left .ac-title { font-family: var(--font-d); font-weight: 800; font-size: 22px; color: var(--white); margin-bottom: 8px; line-height: 1.2; }
    .aud-acc-left .ac-summary { font-family: var(--font-b); font-size: 14px; color: rgba(255,255,255,0.55); line-height: 1.65; margin: 0; }
    .aud-acc-btn {
      width: 44px; height: 44px; flex-shrink: 0;
      background: rgba(242,152,41,0.12); border: 1px solid var(--orange-border);
      border-radius: 50%; color: var(--orange); font-size: 24px; line-height: 1;
      cursor: pointer; display: flex; align-items: center; justify-content: center;
      transition: transform 0.3s, background 0.2s;
    }
    .aud-acc-item.open .aud-acc-btn { transform: rotate(90deg); background: var(--orange); color: var(--white); }
    .aud-acc-body {
      max-height: 0; overflow: hidden;
      transition: max-height 0.4s cubic-bezier(0.16,1,0.3,1), padding 0.3s;
      padding: 0 32px;
    }
    .aud-acc-body p { font-family: var(--font-b); font-size: 15px; color: rgba(255,255,255,0.7); line-height: 1.8; }
    .aud-acc-item.open .aud-acc-body { max-height: 400px; padding: 0 32px 28px; }

    @media (max-width: 960px) {
      .aud-acc-header { padding: 20px; }
      .aud-acc-body { padding: 0 20px; }
      .aud-acc-item.open .aud-acc-body { padding: 0 20px 20px; }
      .aud-acc-left .ac-title { font-size: 18px; }
    }

/* ── THANK YOU BOX (HIDDEN) ── */
.thank-you-box{
    text-align:center;
    padding:30px;
}

.thank-icon{
    width:90px;
    height:90px;
    border-radius:50%;
    background:#F39A25;
    color:#fff;
    margin:0 auto 20px;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:42px;
    font-weight:700;
}

.thank-label{
    color:#F39A25;
    letter-spacing:3px;
    font-size:12px;
    text-transform:uppercase;
    margin-bottom:15px;
}

.thank-you-box h3{
    font-size:36px;
    margin-bottom:15px;
}

.thank-you-box p{
    color:#666;
    line-height:1.8;
    margin-bottom:25px;
}

.thank-btn{
    display:inline-block;
    background:#F39A25;
    color:#fff;
    text-decoration:none;
    padding:14px 28px;
    border-radius:999px;
    font-weight:700;
}

.fgrp select{
    width:100%;
    height:44px;
    padding:0 16px;
    border:1px solid #ddd;
    border-radius:10px;
    background:#fff;
    font-size:16px;
    color:#333;
    outline:none;
    box-sizing:border-box;

    appearance:none;
    -webkit-appearance:none;
    -moz-appearance:none;

    background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24'%3E%3Cpath fill='%23666' d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
    background-repeat:no-repeat;
    background-position:right 16px center;
    padding-right:40px;
}

.fgrp select:focus{
    border-color:#F39A25;
}
/* ── ĐĂNG KÝ NGAY ── */


.side-benefits{
    display:flex;
    flex-direction:column;
    gap:22px;
    margin-bottom:20px;
}

.benefit-item{
    display:flex;
    gap:18px;
    align-items:flex-start;
}

.benefit-icon{
    width:50px;
    height:50px;
    border-radius:50%;
    background:#fff;
    border:1px solid #eee;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:20px;
    flex-shrink:0;
}

.benefit-item h4{
    margin:0 0 6px;
    font-size:22px;
}

.benefit-item p{
    margin:0;
    color:#666;
}



.contact-item{
    display:flex;
    align-items:center;
    gap:10px;
    color:#333;
}

.contact-item span{
    color:#f39a25;
    width:20px;
}
/* ── chia khung ô đăng ký ngay ── */
.contact-grid{
    display:grid;
    grid-template-columns:380px 1fr;
    gap:50px;
}

.contact-right{
    display:flex;
    flex-direction:column;
    gap:30px;
}

.ai-support{
    margin-top:0;
}

/* ── AI SUPPPORT CÂU HỎI KHÁC ── */
/* CARD */

.chat-helper-card{

    display:flex;

    align-items:center;

    justify-content:space-between;

    margin-top:10px;

    position:relative;
}

/* BOX */

.chat-helper-content{

    display:flex;

    align-items:center;

    gap:20px;

    width:70%;

    padding:20px 24px;

    background:#fffdf9;

    border:1px solid #f0ddc5;

    border-radius:22px;
}

/* ICON */

.chat-helper-icon{

    width:90px;
    height:90px;

    flex-shrink:0;

    background:#fff4e8;

    border-radius:50%;

    display:flex;

    align-items:center;

    justify-content:center;
}

.chat-helper-icon img{

    width:89px;
    height:89px;
}

/* TEXT */

.chat-helper-text h3{

    margin:0 0 6px;

    font-size:28px;

    font-weight:700;

    color:#111;
}

.chat-helper-text p{

    margin:0;

    font-size:16px;

    color:#666;

    line-height:1.5;
}

/* ARROW AREA */

.chat-helper-arrow{

    width:250px;

    text-align:center;
}

/* SVG */

.chat-line{

    width:220px;

    height:110px;

    overflow:visible;
}

.chat-line path{

    fill:none;

    stroke:#f39a25;

    stroke-width:3;

    stroke-dasharray:8 8;

    stroke-linecap:round;
}

.chat-arrow{

    fill:none;

    stroke:#f39a25;

    stroke-width:3;

    stroke-linecap:round;

    stroke-linejoin:round;
}

/* TEXT */

.chat-helper-note{

    margin-top:-10px;

    font-size:18px;

    font-weight:600;

    color:#111;

    transform:rotate(-7deg);
}

.chat-helper-note span{

    color:#f39a25;
}
.form-security{

    margin-top:0px;

    text-align:center;

    font-size:12px;

    color:#999;

    display:flex;

    align-items:center;

    justify-content:center;

    gap:6px;
}

.lock-icon{

    filter: grayscale(100%);

    opacity: .7;
}

.contact-item{
    display:flex;
    align-items:center;
    gap:12px;
}

.contact-item i{
    color:#f39a25;
    width:18px;
    text-align:center;
    flex-shrink:0;
}

/* =========================================================
   MOBILE RESPONSIVE � CONTACT / REGISTRATION
   ========================================================= */

@media (max-width: 768px) {

    /* Contact section */
    .contact-grid {
        grid-template-columns: 1fr !important;
        gap: 42px;
    }

    .contact-left,
    .contact-right {
        width: 100%;
        min-width: 0;
    }

    /* Heading */
    .contact-left .stitle {
        font-size: clamp(30px, 8vw, 42px);
        line-height: 1.08;
    }

    /* Form */
    .contact-form {
        width: 100%;
        min-width: 0;
        gap: 18px;
    }

    .form-row {
        grid-template-columns: 1fr !important;
        gap: 18px;
    }

    .fgrp {
        width: 100%;
        min-width: 0;
    }

    .fgrp input,
    .fgrp textarea,
    .fgrp select {
        width: 100%;
        max-width: 100%;
        min-width: 0;
        box-sizing: border-box;
    }

    .fgrp textarea {
        min-height: 120px;
    }

    /* Submit button */
    .contact-form .btn {
        width: 100% !important;
        max-width: 100%;
        box-sizing: border-box;
    }

    /* Security note */
    .form-security {
        font-size: 11px;
        line-height: 1.5;
        padding: 0 8px;
    }

    /* Chat helper */
    .chat-helper-card {
        width: 100%;
        flex-direction: column;
        align-items: stretch;
        gap: 18px;
        margin-top: 6px;
    }

    .chat-helper-content {
        width: 100%;
        padding: 18px;
        gap: 14px;
        box-sizing: border-box;
    }

    .chat-helper-icon {
        width: 64px;
        height: 64px;
    }

    .chat-helper-icon img {
        width: 63px;
        height: 63px;
    }

    .chat-helper-text {
        min-width: 0;
    }

    .chat-helper-text h3 {
        font-size: 20px;
        line-height: 1.25;
    }

    .chat-helper-text p {
        font-size: 13px;
        line-height: 1.5;
    }

    .chat-helper-arrow {
        width: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .chat-line {
        width: 150px;
        height: 75px;
    }

    .chat-helper-note {
        font-size: 15px;
        margin-top: -8px;
    }
}


/* Extra-small phones � iPhone SE / narrow screens */
@media (max-width: 390px) {

    .sec {
        padding-left: 20px;
        padding-right: 20px;
    }

    .contact-grid {
        gap: 36px;
    }

    .contact-left .stitle {
        font-size: 30px;
    }

    .fgrp input,
    .fgrp textarea,
    .fgrp select {
        font-size: 14px;
    }

    .chat-helper-content {
        padding: 16px;
    }

    .chat-helper-icon {
        width: 56px;
        height: 56px;
    }

    .chat-helper-icon img {
        width: 55px;
        height: 55px;
    }

    .chat-helper-text h3 {
        font-size: 18px;
    }

    .chat-helper-text p {
        font-size: 12px;
    }
}
/* ── BEARS SCORE INTRO ── */

.score-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.score-intro-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.score-intro-image img {
  display: block;
  width: 100%;
  max-width: 800px;
  height: auto;
  object-fit: contain;
}

.messenger-float {
  position: fixed;
  right: 28px;
  bottom: 28px;

  display: block;
  width: 220px;

  z-index: 9999;
  text-decoration: none;

  transition: transform 0.2s ease, filter 0.2s ease;
}

.messenger-float img {
  display: block;
  width: 100%;
  height: auto;
}

.messenger-float:hover {
  transform: translateY(-4px);
  filter: brightness(1.05);
}


/* Tablet */
@media (max-width: 768px) {
  .messenger-float {
    width: 200px;
    right: 20px;
    bottom: 20px;
  }
}


/* iPhone */
@media (max-width: 580px) {
  .messenger-float {
    width: 180px;
    right: 16px;
    bottom: 16px;
  }
}


/* iPhone SE / m�n h�nh r?t nh? */
@media (max-width: 390px) {
  .messenger-float {
    width: 180px;
    right: 12px;
    bottom: 12px;
  }
}
/* =========================================================
   MOBILE HEADER
   ========================================================= */

.mobile-menu-btn {
  display: none;
}


/* =========================================================
   MOBILE — max 960px
   ========================================================= */

@media (max-width: 960px) {

  /* ---------- HEADER ---------- */

  #main-nav {
    position: fixed;

    top: 16px;
    left: 12px;
    right: 12px;

    width: auto;
    height: 64px;

    padding: 0 10px 0 22px;

    display: flex;
    align-items: center;
    justify-content: space-between;

    background: rgba(10,10,10,0.96);

    border: none;
    border-radius: 999px;

    box-shadow: 0 8px 24px rgba(0,0,0,0.22);

    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);

    transform: none;
  }


  /* ---------- DESKTOP CTA: HIDE ---------- */

  #main-nav > .nav-cta {
    display: none !important;
  }


  /* ---------- DESKTOP MENU: HIDE ---------- */

  #main-nav > .nav-links {
    display: none;
  }


  /* ---------- MOBILE LOGO ---------- */

  #main-nav .nav-logo {
    display: flex;
    align-items: center;
  }

  #main-nav .nav-logo img {
    height: 25px !important;
    width: auto !important;
    display: block;
  }


  /* ---------- HAMBURGER ---------- */

  #main-nav > .mobile-menu-btn {
    display: flex;

    width: 46px;
    height: 46px;
    min-width: 46px;
    min-height: 46px;

    flex: 0 0 46px;

    margin: 0;
    padding: 0;

    border: none !important;
    outline: none !important;
    border-radius: 50%;

    background: #0A0A0A;

    cursor: pointer;

    flex-direction: column;
    align-items: center;
    justify-content: center;

    gap: 4px;

    box-shadow: none;

    -webkit-tap-highlight-color: transparent;
  }


  #main-nav > .mobile-menu-btn span {
    display: block;

    width: 21px;
    height: 2px;

    margin: 0;

    background: #FFFFFF;

    border-radius: 2px;

    transition:
      transform 0.25s ease,
      opacity 0.2s ease;
  }


  /* ---------- HAMBURGER → X ---------- */

  #main-nav > .mobile-menu-btn.active span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  #main-nav > .mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
  }

  #main-nav > .mobile-menu-btn.active span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }


  /* =====================================================
     MOBILE MENU PANEL
     ===================================================== */

  #main-nav > .nav-links.open {
    display: flex !important;

    position: fixed;

    top: 78px;
    right: 12px;
    left: auto;

    width: min(300px, calc(100vw - 24px));
    max-width: 300px;

    flex-direction: column;
    align-items: stretch;

    gap: 4px;

    padding: 14px;

    background: rgba(10,10,10,0.92);

    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 20px;

    box-shadow: 0 20px 50px rgba(0,0,0,0.45);

    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);

    z-index: 10000;
  }


  #main-nav > .nav-links.open li {
    width: 100%;
    display: block;
  }


  #main-nav > .nav-links.open li a {
    display: flex;

    align-items: center;

    width: 100%;
    min-height: 48px;

    padding: 13px 16px;

    font-family: var(--font-m);
    font-size: 11px;
    font-weight: 500;
    line-height: 1.3;
    letter-spacing: 0.14em;

    color: rgba(255,255,255,0.78);

    text-decoration: none;
    white-space: nowrap;

    border-radius: 10px;

    box-sizing: border-box;
  }


  #main-nav > .nav-links.open li a:hover {
    color: var(--orange);
    background: rgba(242,152,41,0.08);
  }


  /* ---------- MOBILE CTA ---------- */

  #main-nav > .nav-links.open .mobile-menu-cta {
    display: block;

    margin-top: 8px;
    padding-top: 10px;

    border-top: 1px solid rgba(255,255,255,0.08);
  }


  #main-nav > .nav-links.open .mobile-menu-cta a {
    display: flex;

    align-items: center;
    justify-content: center;

    width: 100%;
    min-height: 44px;

    padding: 12px 16px;

    background: var(--orange);
    color: var(--white);

    font-family: var(--font-d);
    font-size: 11px;
    font-weight: 800;

    letter-spacing: 0.05em;

    border-radius: var(--r-pill);
  }


  #main-nav > .nav-links.open .mobile-menu-cta a:hover {
    background: var(--orange-bright);
    color: var(--white);
  }


  /* =====================================================
     MOBILE HEADER AFTER SCROLL
     ===================================================== */

  #main-nav.is-scrolled {
    top: 12px;
    left: auto;
    right: 12px;

    width: auto;
    height: 46px;

    padding: 0;

    background: transparent !important;

    border: none !important;
    border-radius: 0;

    box-shadow: none !important;

    backdrop-filter: none;
    -webkit-backdrop-filter: none;

    justify-content: flex-end;

    transform: none !important;
  }


  #main-nav.is-scrolled .nav-logo {
    display: none !important;
  }


  #main-nav.is-scrolled > .mobile-menu-btn {
    display: flex !important;

    width: 46px;
    height: 46px;

    flex: 0 0 46px;

    background: #0A0A0A;
    border-radius: 50%;
  }


  #main-nav.is-scrolled > .nav-links.open {
    top: 60px;
    right: 12px;
  }

}


/* =========================================================
   SMALL PHONES
   ========================================================= */

@media (max-width: 390px) {

  #main-nav {
    top: 12px;
    left: 10px;
    right: 10px;

    height: 62px;

    padding-left: 18px;
    padding-right: 8px;
  }

  #main-nav > .mobile-menu-btn,
  #main-nav.is-scrolled > .mobile-menu-btn {
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    flex-basis: 44px;
  }

  #main-nav > .nav-links.open {
    top: 72px;
    right: 12px;

    width: calc(100vw - 24px);
    max-width: none;
  }

  #main-nav.is-scrolled > .nav-links.open {
    top: 60px;
  }

}

/* =========================================================
   FINAL MOBILE BURGER + HEADER
   Single source of truth for the mobile navigation.
   ========================================================= */

.mobile-menu-btn {
  display: none;
  width: 46px;
  height: 46px;
  min-width: 46px;
  min-height: 46px;
  flex: 0 0 46px;

  margin: 0;
  padding: 0;

  border: none !important;
  outline: none !important;
  border-radius: 50%;

  background: #0A0A0A;
  box-shadow: none;

  cursor: pointer;

  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;

  -webkit-tap-highlight-color: transparent;

  transition: transform 0.2s ease, background 0.2s ease;
}

.mobile-menu-btn:hover {
  background: #141414;
}

.mobile-menu-btn:active {
  transform: scale(0.94);
}

.mobile-menu-btn:focus,
.mobile-menu-btn:focus-visible {
  outline: none !important;
  border: none !important;
  box-shadow: none !important;
}

.mobile-menu-btn span {
  display: block;
  width: 21px;
  height: 2px;
  margin: 0;

  background: #FFFFFF;
  border: 0;
  border-radius: 2px;

  transition: transform 0.25s ease, opacity 0.2s ease;
}

/* Burger → X */
.mobile-menu-btn.active span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}


/* Mobile header */
@media (max-width: 960px) {

  /* Header ở đầu trang:
     pill đen + logo + burger tròn */
  #main-nav:not(.is-scrolled) {
    transform: none !important;
    top: 16px !important;
    left: 12px !important;
    right: 12px !important;

    width: auto !important;
    height: 64px !important;

    padding: 0 10px 0 22px !important;

    background: rgba(10,10,10,0.96) !important;

    border: none !important;
    border-radius: 999px !important;

    box-shadow: 0 8px 24px rgba(0,0,0,0.22) !important;

    justify-content: space-between !important;
  }

  #main-nav:not(.is-scrolled) .nav-logo {
    display: flex !important;
    align-items: center;
  }

  #main-nav:not(.is-scrolled) .nav-logo img {
    height: 25px !important;
    width: auto !important;
    display: block;
  }

  #main-nav:not(.is-scrolled) > .mobile-menu-btn {
    display: flex !important;
  }


  /* Khi scroll:
     ẩn logo + toàn bộ pill, chỉ giữ burger */
  #main-nav.is-scrolled {
    position: fixed !important;

    top: 12px !important;
    right: 12px !important;
    left: auto !important;

    width: auto !important;
    height: 46px !important;

    padding: 0 !important;

    background: transparent !important;

    border: none !important;
    border-radius: 0 !important;

    box-shadow: none !important;

    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;

    transform: none !important;

    justify-content: flex-end !important;
  }

  #main-nav.is-scrolled .nav-logo {
    display: none !important;
  }

  #main-nav.is-scrolled > .mobile-menu-btn {
    display: flex !important;

    width: 46px !important;
    height: 46px !important;
    min-width: 46px !important;
    min-height: 46px !important;
    flex-basis: 46px !important;

    border: none !important;
    border-radius: 50% !important;

    background: #0A0A0A !important;
    box-shadow: 0 5px 18px rgba(0,0,0,0.22) !important;
  }

  /* Menu panel — nền đủ đậm để đọc chữ */
  #main-nav > .nav-links.open {
    background: rgba(10,10,10,0.92) !important;
    border: none !important;
    box-shadow: 0 20px 50px rgba(0,0,0,0.45);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
  }

  /* Nếu mở menu sau khi scroll */
  #main-nav.is-scrolled > .nav-links.open {
    top: 64px !important;
    right: 12px !important;
  }
}


/* Small phones */
@media (max-width: 390px) {

  #main-nav:not(.is-scrolled) {
    top: 12px !important;
    left: 10px !important;
    right: 10px !important;

    height: 62px !important;

    padding-left: 18px !important;
    padding-right: 8px !important;
  }

  #main-nav:not(.is-scrolled) > .mobile-menu-btn,
  #main-nav.is-scrolled > .mobile-menu-btn {
    width: 44px !important;
    height: 44px !important;
    min-width: 44px !important;
    min-height: 44px !important;
    flex-basis: 44px !important;
  }

  #main-nav > .nav-links.open {
    top: 72px !important;
    right: 12px !important;
    width: calc(100vw - 24px) !important;
    max-width: none !important;
  }

  #main-nav.is-scrolled > .nav-links.open {
    top: 60px !important;
    right: 12px !important;
  }
}