*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;font-size:16px;}
body, html { -webkit-tap-highlight-color: transparent; }

:root{
   --bg-deep:#0b0e14;
  --mesh-1:#1a1c21;
  --mesh-2:#000000;
  --mesh-3:#010101;
  --mesh-5:#090a0a;
  --mesh-6:#000000;

  --glass-fill: linear-gradient(135deg, rgba(255,255,255,0.16), rgba(255,255,255,0.04));
  --glass-fill-strong: linear-gradient(135deg, rgba(255,255,255,0.22), rgba(255,255,255,0.06));
  --glass-border: rgba(255,255,255,0.30);
  --glass-border-soft: rgba(255,255,255,0.14);
  --glass-shadow: 0 12px 40px rgba(0,0,0,0.45), inset 0 1px 0 rgba(255,255,255,0.45), inset 0 -1px 0 rgba(255,255,255,0.05);

  --mesh-4:#000000;
  --gold:#E3B24E;
  --gold-soft: rgba(227,178,78,0.85);
  --text-hi:#F6F7FB;
  --text-lo: rgba(246,247,251,0.72);
  --text-dim: rgba(246,247,251,0.5);

  --r-lg: 30px;
  --r-md: 22px;
  --r-sm: 16px;
  --r-pill: 100px;
}

body{
  background:var(--bg-deep);
  color:var(--text-hi);
  font-family:"Inter",-apple-system,BlinkMacSystemFont,"SF Pro Text",sans-serif;
  font-weight:400;
  line-height:1.7;
  min-height:100vh;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  position:relative;
}
/* ── AMBIENT MESH BACKGROUND — flowing macOS 26 style wallpaper ── */
.mesh{
  position:fixed;inset:0;z-index:-2;overflow:hidden;background:var(--bg-deep);
  contain:strict;contain:layout style paint;
  transform:translateZ(0);
  backface-visibility:hidden;
}
.mesh span{
  position:absolute;border-radius:50%;filter:blur(42px);
  will-change:transform, opacity;mix-blend-mode:screen;
  transform:translate3d(0,0,0);
  backface-visibility:hidden;
  animation-timing-function:ease-in-out;
  animation-iteration-count:infinite;
}
.mesh .b1{width:52vw;height:52vw;left:-16vw;top:-20vw;background:var(--mesh-1);opacity:0.55;animation:drift1 62s ease-in-out infinite;}
.mesh .b2{width:44vw;height:44vw;right:-14vw;top:-6vw;background:var(--mesh-5);opacity:0.4;animation:drift2 68s ease-in-out infinite;}
.mesh .b3{width:46vw;height:46vw;left:10vw;bottom:-24vw;background:var(--mesh-2);opacity:0.45;animation:drift3 60s ease-in-out infinite;}
.mesh .b4{width:36vw;height:36vw;right:-6vw;bottom:-10vw;background:var(--mesh-3);opacity:0.35;animation:drift1 58s ease-in-out infinite reverse;}
.mesh .b5{width:32vw;height:32vw;left:36vw;top:22vw;background:var(--mesh-4);opacity:0.3;animation:drift2 64s ease-in-out infinite reverse;}
.mesh .b6{width:26vw;height:26vw;right:22vw;bottom:18vw;background:var(--mesh-6);opacity:0.25;animation:drift3 56s ease-in-out infinite;}
.mesh::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(ellipse 90% 70% at 50% 50%, transparent 30%, var(--bg-deep) 100%);
  pointer-events:none;
}
@media(max-width:820px){
  .mesh span{filter:blur(35px);}
  .mesh .b5,.mesh .b6{display:none;}
}
@keyframes drift1{0%{transform:translate3d(0,0,0) scale(1);}100%{transform:translate3d(5vw,3vw,0) scale(1.04);}}
@keyframes drift2{0%{transform:translate3d(0,0,0) scale(1);}100%{transform:translate3d(-6vw,4vw,0) scale(0.98);}}
@keyframes drift3{0%{transform:translate3d(0,0,0) scale(1);}100%{transform:translate3d(4vw,-5vw,0) scale(1.03);}}
.grain{position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.7' numOctaves='1' stitchTiles='stitch'/><feColorMatrix type='matrix' values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 0.03 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  background-size:240px 240px;opacity:0.3;contain:strict;}

@media(prefers-reduced-motion:reduce){
  .mesh span{animation:none !important;}
  html{scroll-behavior:auto;}
  *, *::before, *::after{animation-duration:0.01ms !important;animation-iteration-count:1 !important;transition-duration:0.01ms !important;}
}

/* ── GLASS BASE ── */
.glass{
  position:relative;
  background:var(--glass-fill);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border:1px solid var(--glass-border);
  border-radius:var(--r-lg);
  box-shadow:0 8px 24px rgba(0,0,0,0.35), inset 0 1px 0 rgba(255,255,255,0.35);
  contain:layout paint;
  will-change:transform, opacity;
  transform:translateZ(0);
}
.glass::before{
  content:"";position:absolute;top:0;left:6%;right:6%;height:1px;
  background:linear-gradient(90deg, transparent, rgba(255,255,255,0.75), transparent);
  border-radius:100px;
}

/* ── NAV (floating glass pill / dynamic island) ── */
nav{
  position:fixed;top:18px;left:50%;transform:translateX(-50%);z-index:100;
  display:flex;align-items:center;gap:28px;
  padding:12px 26px;
  border-radius:var(--r-pill);
  background:var(--glass-fill-strong);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border:1px solid var(--glass-border);
  box-shadow:0 8px 24px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.4);
  transition:padding 0.3s ease, gap 0.3s ease, box-shadow 0.3s ease;
  will-change:auto;
}
nav.scrolled{
  padding:9px 22px;gap:22px;
  box-shadow:0 4px 16px rgba(0,0,0,0.45), inset 0 1px 0 rgba(255,255,255,0.3);
}
.nav-logo{
  font-size:14px;font-weight:700;color:var(--gold);text-decoration:none;letter-spacing:0.01em;
  white-space:nowrap;
}
.nav-links{display:flex;gap:20px;list-style:none;}
.nav-links a{
  color:var(--text-lo);text-decoration:none;font-size:12.5px;font-weight:600;
  letter-spacing:0.03em;text-transform:uppercase;transition:color 0.2s;white-space:nowrap;
}
.nav-links a:hover{color:var(--text-hi);}
@media(max-width:720px){ .nav-links{display:none;} nav{gap:0;} }

/* ── HERO ── */
.hero{min-height:100vh;display:flex;align-items:center;position:relative;padding:140px 0 80px;}
.hero-wrap{
  max-width:1120px;margin:0 auto;padding:0 40px;
  display:grid;grid-template-columns:1fr 380px;gap:72px;align-items:center;
  position:relative;z-index:2;
}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 16px 7px 12px;border-radius:var(--r-pill);
  background:var(--glass-fill);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border:1px solid var(--glass-border-soft);
  font-family:"DM Mono",monospace;font-size:12px;letter-spacing:0.14em;
  text-transform:uppercase;color:var(--gold);margin-bottom:26px;
  opacity:0;animation:fadeUp 0.8s ease 0.1s forwards;
}
.hero-tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--gold);animation:pulse 2s infinite;}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1);}50%{opacity:0.5;transform:scale(0.8);}}

.hero-name{
  font-size:clamp(50px,7.5vw,82px);font-weight:800;line-height:1.02;letter-spacing:-0.02em;
  opacity:0;animation:fadeUp 0.9s ease 0.25s forwards;
}
.hero-name .line2{
  display:inline-block;
  background:linear-gradient(120deg, var(--gold) 0%, #fff 55%, var(--mesh-4, #00C2B5) 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:var(--text-hi);
}
.hero-kh{
  font-family:"Noto Sans Khmer",sans-serif;font-size:22px;font-weight:500;
  color:var(--gold);margin-top:12px;
  opacity:0;animation:fadeUp 0.9s ease 0.4s forwards;
}
.hero-divider{width:44px;height:2px;background:var(--gold);border-radius:2px;margin:26px 0;opacity:0;animation:fadeUp 0.9s ease 0.5s forwards;}
.hero-meta{display:flex;flex-wrap:wrap;gap:16px;opacity:0;animation:fadeUp 0.9s ease 0.6s forwards;}
.hero-meta-item{
  padding:12px 18px;border-radius:var(--r-sm);
  background:var(--glass-fill);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border:1px solid var(--glass-border-soft);
  display:flex;flex-direction:column;gap:4px;
}
.hero-meta-item .label{font-family:"DM Mono",monospace;font-size:10px;letter-spacing:0.14em;text-transform:uppercase;color:var(--gold);}
.hero-meta-item .value{font-size:15px;color:var(--text-hi);font-weight:500;line-height:1.5;}

/* ── PHOTO CARD ── */
.photo-card{position:relative;opacity:0;animation:fadeLeft 1s ease 0.3s forwards;}
@keyframes fadeLeft{from{opacity:0;transform:translateX(30px);}to{opacity:1;transform:translateX(0);}}
.photo-frame{
  position:relative;border-radius:32px;padding:10px;
  background:var(--glass-fill-strong);
  -webkit-backdrop-filter:blur(16px) saturate(150%);backdrop-filter:blur(16px) saturate(150%);
  border:1px solid var(--glass-border);
  box-shadow:var(--glass-shadow);
}
.photo-inner{border-radius:24px;overflow:hidden;position:relative;aspect-ratio:3/4;background:rgba(0,0,0,0.3);}
.photo-inner img{width:100%;height:100%;object-fit:cover;display:block;filter:brightness(0.95);transition:filter 0.3s ease;}
.photo-card:hover .photo-inner img{filter:brightness(1);}
.photo-badge{
  position:absolute;bottom:-18px;left:50%;transform:translateX(-50%);
  border-radius:var(--r-pill);padding:10px 22px;
  display:flex;align-items:center;gap:10px;white-space:nowrap;
  background:var(--glass-fill-strong);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  border:1px solid var(--glass-border);
  box-shadow:0 10px 30px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.5);
}
.photo-badge span{font-family:"DM Mono",monospace;font-size:12px;color:var(--text-hi);letter-spacing:0.06em;display:inline-flex;align-items:center;gap:6px;}
.photo-badge span img{display:block;flex-shrink:0;}

/* ── SECTION BASE ── */
.section{padding:100px 0;}
.container{max-width:1120px;margin:0 auto;padding:0 40px;}
.section-eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:"DM Mono",monospace;font-size:13px;letter-spacing:0.2em;text-transform:uppercase;
  color:var(--gold);margin-bottom:16px;font-weight:600;
}
.section-eyebrow::before{content:"";width:20px;height:1px;background:var(--gold);}
.section-title{font-size:clamp(34px,4vw,48px);font-weight:800;line-height:1.15;margin-bottom:48px;color:var(--text-hi);}

/* ── ABOUT ── */
.about-layout{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start;}
.about-text p{font-size:18px;line-height:1.85;color:var(--text-lo);font-weight:400;margin-bottom:20px;}
.about-text p:last-child{margin-bottom:0;}
.about-stats{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.stat-box{
  padding:24px 20px;position:relative;overflow:hidden;
  transition:transform 0.25s ease, box-shadow 0.25s ease;
  will-change:auto;
}
.stat-box:hover{transform:translateY(-3px);}
.stat-box .sb-val{font-size:34px;font-weight:800;color:var(--gold);line-height:1;margin-bottom:8px;}
.stat-box .sb-lbl{font-size:14px;color:var(--text-lo);font-weight:500;}

/* ── SUBJECTS ── */
.subjects-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px;}
.subject-item{
  padding:18px 18px;display:flex;align-items:center;gap:14px;
  transition:transform 0.25s ease;cursor:default;
  border-radius:var(--r-md);
  will-change:auto;
}
.subject-item:hover{transform:translateX(3px);}
.subject-num{font-family:"DM Mono",monospace;font-size:12px;color:var(--gold);min-width:24px;}
.subject-name{font-size:17px;font-weight:500;color:var(--text-hi);}

/* ── TIMELINE ── */
.timeline{display:flex;flex-direction:column;gap:0;}
.tl-item{display:grid;grid-template-columns:110px 1px 1fr;gap:0 28px;padding-bottom:36px;}
.tl-item:last-child{padding-bottom:0;}
.tl-year{font-family:"DM Mono",monospace;font-size:13px;color:var(--gold);font-weight:500;padding-top:18px;text-align:right;}
.tl-line{position:relative;background:rgba(255,255,255,0.14);}
.tl-line::before{
  content:"";position:absolute;top:22px;left:50%;transform:translateX(-50%);
  width:10px;height:10px;border-radius:50%;background:var(--gold);box-shadow:0 0 14px var(--gold);
}
.tl-content{padding:18px 22px;}
.tl-content h3{font-size:22px;font-weight:700;color:var(--text-hi);margin-bottom:8px;}
.tl-content p{font-size:16px;color:var(--text-lo);font-weight:400;line-height:1.8;}
.tl-tag{
  display:inline-block;margin-top:12px;padding:4px 14px;border-radius:var(--r-pill);
  background:rgba(227,178,78,0.14);border:1px solid rgba(227,178,78,0.3);
  font-size:11px;color:var(--gold);font-family:"DM Mono",monospace;letter-spacing:0.06em;line-height:1.6;
}

/* ── CERTIFICATES ── */
.cert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(310px,1fr));gap:24px;}
.cert-card{overflow:hidden;transition:transform 0.25s ease, box-shadow 0.25s ease;will-change:auto;}
.cert-card:hover{transform:translateY(-4px);}
.cert-img-wrap{position:relative;aspect-ratio:4/3;overflow:hidden;margin:10px;border-radius:22px;background:rgba(0,0,0,0.25);}
.cert-img-wrap img{width:100%;height:100%;object-fit:cover;transition:filter 0.25s ease;filter:brightness(0.92);cursor:pointer;}
.cert-card:hover .cert-img-wrap img{filter:brightness(1);}
.cert-body{padding:8px 22px 22px;}
.cert-body h3{font-size:20px;font-weight:700;color:var(--text-hi);margin-bottom:6px;}
.cert-body p{font-size:15px;color:var(--text-lo);font-weight:400;}
.cert-body .cert-meta{display:flex;align-items:center;gap:8px;margin-top:14px;padding-top:14px;border-top:1px solid var(--glass-border-soft);}
.cert-body .cert-icon{font-size:18px;}
.cert-body .cert-date{font-family:"DM Mono",monospace;font-size:11px;color:var(--gold);letter-spacing:0.08em;}

/* ── GOALS / LOCATION ── */
.goals-layout{display:grid;grid-template-columns:1fr 1fr 1fr;gap:24px;}
.goal-card{padding:30px 28px;transition:transform 0.25s ease;will-change:auto;}
.goal-card:hover{transform:translateY(-3px);}
.goal-icon{margin-bottom:16px;filter:drop-shadow(0 4px 10px rgba(0,0,0,0.4));}
.goal-card h3{font-size:18px;font-weight:700;color:var(--gold);margin-bottom:10px;
  font-family:"Noto Sans Khmer","Inter",sans-serif;}
.goal-card p{font-size:15px;color:var(--text-lo);font-weight:400;line-height:1.8;
  font-family:"Noto Sans Khmer","Inter",sans-serif;}
@media(max-width:900px){ .goals-layout{grid-template-columns:1fr;} }

/* ── FOOTER ── */
footer{padding:60px 0 40px;text-align:center;}
.footer-name{font-size:clamp(30px,4.6vw,52px);font-weight:800;
  background:linear-gradient(120deg, var(--gold), #fff 60%);
  -webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:12px;}
.footer-school{font-size:14px;color:var(--text-lo);margin-bottom:32px;font-family:"DM Mono",monospace;letter-spacing:0.04em;}
.footer-links{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;margin-bottom:36px;}
.footer-links a{
  display:flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-pill);padding:11px 22px;
  background:var(--glass-fill);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border:1px solid var(--glass-border-soft);
  text-decoration:none;color:var(--text-lo);font-size:14px;font-weight:500;line-height:1;
  transition:color 0.2s ease, transform 0.2s ease, background 0.2s ease;
  will-change:auto;
}
.footer-links a img{width:18px;height:18px;object-fit:contain;display:block;flex-shrink:0;}
.footer-links a[href*="youtube"] img{width:22px;height:22px;object-fit:contain;display:block;flex-shrink:0;}
.footer-links a:hover{color:var(--text-hi);transform:translateY(-2px);background:var(--glass-fill-strong);}
.footer-copy{font-size:13px;color:var(--text-dim);font-family:"DM Mono",monospace;}
.telegram-hint{display:none;font-size:13px;color:#ff8a8a;margin-top:2px;margin-bottom:24px;}

/* ── QR CARD ── */
.qr-card{display:inline-flex;align-items:center;gap:20px;margin-bottom:32px;}
.qr-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:center;}
.qr-view-btn,.copy-link-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-pill);padding:11px 22px;
  font-family:"DM Mono",monospace;font-size:12px;font-weight:600;letter-spacing:0.05em;cursor:pointer;
  transition:background 0.2s, border-color 0.2s, transform 0.15s;
}
.qr-view-btn{
  background:var(--glass-fill);color:var(--gold);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border:1px solid rgba(227,178,78,0.35);
}
.qr-view-btn:hover{background:rgba(227,178,78,0.16);}
.qr-view-btn:active{transform:scale(0.96);}
.copy-link-btn{background:var(--gold);color:#1a1305;border:none;}
.copy-link-btn:hover{background:#f0c469;}
.copy-link-btn:active{transform:scale(0.96);}
.copy-link-btn.copied{background:#4CD98B;color:#062011;}
@media(max-width:540px){ .qr-card{flex-direction:column;} }

/* ── LIGHTBOX ── */
.lightbox{
  position:fixed;inset:0;z-index:999;
  background:rgba(3,3,10,0.85);
  -webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);
  display:flex;align-items:center;justify-content:center;padding:20px;
  opacity:0;pointer-events:none;transition:opacity 0.25s ease;
  contain:strict;
}
.lightbox.active{opacity:1;pointer-events:auto;}
.lightbox img{max-width:92vw;max-height:90vh;border-radius:20px;box-shadow:0 20px 60px rgba(0,0,0,0.6);transform:scale(0.9);transition:transform 0.3s ease;border:1px solid var(--glass-border);will-change:transform;}
.lightbox.active img{transform:scale(1);}
.lb-close{
  position:absolute;top:24px;right:28px;
  background:var(--glass-fill-strong);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border:1px solid var(--glass-border);color:#fff;font-size:20px;
  width:44px;height:44px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background 0.2s;
}
.lb-close:hover{background:rgba(255,255,255,0.2);}

/* ── REVEAL ANIMATIONS ── */
.reveal{opacity:0;transform:translate3d(0,20px,0);transition:opacity 0.45s ease,transform 0.45s ease;will-change:opacity, transform;}
.reveal.in{opacity:1;transform:translate3d(0,0,0);}
.reveal-left{opacity:0;transform:translate3d(-20px,0,0);transition:opacity 0.45s ease,transform 0.45s ease;will-change:opacity, transform;}
.reveal-left.in{opacity:1;transform:translate3d(0,0,0);}
.reveal-right{opacity:0;transform:translate3d(20px,0,0);transition:opacity 0.45s ease,transform 0.45s ease;will-change:opacity, transform;}
.reveal-right.in{opacity:1;transform:translate3d(0,0,0);}
@keyframes fadeUp{from{opacity:0;transform:translate3d(0,16px,0);}to{opacity:1;transform:translate3d(0,0,0);}}

/* ── FOCUS STATES ── */
a:focus-visible, button:focus-visible{outline:2px solid var(--gold);outline-offset:3px;border-radius:8px;}

/* ── RESPONSIVE ── */
@media(max-width:820px){
  .hero-wrap{grid-template-columns:1fr;gap:44px;padding:0 24px;}
  .photo-card{order:-1;max-width:260px;margin:0 auto;}
  .about-layout{grid-template-columns:1fr;}
  .container{padding:0 24px;}
  .section{padding:72px 0;}
  .tl-item{grid-template-columns:76px 1px 1fr;gap:0 16px;}
}
@media(max-width:540px){
  .about-stats{grid-template-columns:1fr 1fr;}
}