:root{
    --navy-950:#0a0f22;
    --navy-900:#0e1530;
    --navy-800:#16213e;
    --navy-700:#212f52;
    --navy-line:#2a3660;
    --orange:#ff6b35;
    --orange-light:#ffb74d;
    --amber-glow:#ffd9a8;
    --text-main:#edeff7;
    --text-mute:#9aa3c4;
    --bg-rgb:10,15,34;
    --on-accent:#0a0f22;
    color-scheme:dark;
  }
  html[data-theme="light"]{
    --navy-950:#f6f7fb;
    --navy-900:#ffffff;
    --navy-800:#eef0f6;
    --navy-700:#e3e6f0;
    --navy-line:#e0e3ee;
    --text-main:#141a2e;
    --text-mute:#5c6480;
    --bg-rgb:246,247,251;
    color-scheme:light;
  }
  *{margin:0;padding:0;box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  *{transition:background-color .3s ease, border-color .3s ease, color .3s ease, fill .3s ease, stroke .3s ease;}
  body{
    background:var(--navy-950);
    color:var(--text-main);
    font-family:'Inter',sans-serif;
    line-height:1.6;
    overflow-x:hidden;
  }
  h1,h2,h3,h4{font-family:'Space Grotesk',sans-serif;font-weight:700;letter-spacing:-0.02em;}
  .mono{font-family:'JetBrains Mono',monospace;}
  a{color:inherit;text-decoration:none;}
  img{max-width:100%;display:block;}
  .wrap{max-width:1180px;margin:0 auto;padding:0 28px;}
  section{position:relative;}

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

  /* ---------- circuit trace signature ---------- */
  #circuit-svg{
    position:absolute;
    left:50%;
    top:0;
    width:2px;
    height:100%;
    transform:translateX(-50%);
    z-index:0;
    pointer-events:none;
  }
  .trace-path{
    fill:none;
    stroke:var(--navy-line);
    stroke-width:2;
  }
  .trace-path-glow{
    fill:none;
    stroke:var(--orange);
    stroke-width:2;
    stroke-dasharray:14 2400;
    stroke-dashoffset:0;
    filter:drop-shadow(0 0 6px var(--orange));
    transition:stroke-dashoffset 1.6s cubic-bezier(.2,.7,.2,1);
  }
  .trace-node{
    fill:var(--navy-800);
    stroke:var(--orange);
    stroke-width:2;
    r:5;
  }
  .trace-node.lit{
    fill:var(--orange);
    filter:drop-shadow(0 0 8px var(--orange));
  }

  /* ---------- nav ---------- */
  header{
    position:fixed;top:0;left:0;right:0;
    z-index:100;
    background:rgba(var(--bg-rgb),0.85);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--navy-line);
  }
  nav{
    display:flex;align-items:center;justify-content:space-between;
    flex-wrap:wrap;row-gap:10px;column-gap:14px;
    max-width:1180px;margin:0 auto;padding:14px 28px;
  }
  .logo{
    display:flex;align-items:center;gap:9px;
    font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:1.08rem;
    white-space:nowrap;flex-shrink:0;
  }
  .logo-mark{
    width:32px;height:32px;
    object-fit:contain;
    filter:drop-shadow(0 0 10px rgba(255,107,53,0.45));
  }
  .nav-links{display:flex;gap:18px;font-size:0.88rem;color:var(--text-mute);flex-shrink:0;}
  .nav-links a{white-space:nowrap;}
  .nav-links a:hover{color:var(--orange-light);}

  .nav-actions{display:flex;align-items:center;gap:7px;flex-shrink:0;flex-wrap:wrap;}
  .nav-btn{
    display:flex;align-items:center;gap:6px;
    padding:7px 12px;border-radius:7px;
    font-size:0.72rem;font-weight:600;white-space:nowrap;
    transition:transform .15s ease, background-color .15s ease, box-shadow .15s ease;
  }
  .nav-btn-primary{
    background:var(--orange);color:var(--on-accent);
  }
  .nav-btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgba(255,107,53,0.4);}
  .nav-btn-online{
    background:rgba(94,200,232,0.1);border:1px solid #5ec8e8;color:#5ec8e8;
  }
  .nav-btn-online:hover{transform:translateY(-2px);background:rgba(94,200,232,0.2);}
  .nav-btn-online--soon{border-color:#4ade80;color:#4ade80;background:rgba(74,222,128,0.12);}
  .nav-btn-register{
    background:rgba(255,107,53,0.08);border:1px solid rgba(255,107,53,0.4);color:var(--orange-light);
  }
  .nav-btn-register:hover{transform:translateY(-2px);background:rgba(255,107,53,0.16);}
  .nav-btn-dot{
    width:6px;height:6px;border-radius:50%;flex-shrink:0;
    background:#4ade80;box-shadow:0 0 5px #4ade80;
    animation:pulse 1.8s infinite;
  }

  .nav-toggle{display:none;background:none;border:none;color:var(--text-main);font-size:1.6rem;cursor:pointer;}

  .admin-btn{
    display:flex;align-items:center;gap:6px;
    padding:7px 12px;border-radius:18px;flex-shrink:0;
    background:var(--navy-800);border:1px solid var(--navy-line);
    color:var(--text-mute);font-size:0.72rem;font-weight:600;white-space:nowrap;
    transition:background-color .2s ease, border-color .2s ease, color .2s ease, transform .15s ease;
  }
  .admin-btn svg{transition:transform .3s ease;flex-shrink:0;}
  .admin-btn:hover{transform:translateY(-2px);color:var(--orange-light);border-color:var(--orange-light);}
  .admin-btn:hover svg{transform:rotate(45deg);}

  .theme-toggle{
    width:32px;height:32px;border-radius:50%;flex-shrink:0;
    background:var(--navy-800);border:1px solid var(--navy-line);
    color:var(--text-main);cursor:pointer;
    display:flex;align-items:center;justify-content:center;
    position:relative;
    transition:background-color .3s ease, border-color .3s ease, transform .15s ease;
  }
  .theme-toggle:hover{transform:translateY(-2px);}
  .theme-toggle svg{position:absolute;transition:opacity .25s ease, transform .35s ease;}
  .theme-toggle .icon-sun{opacity:0;transform:rotate(-90deg) scale(0.5);}
  .theme-toggle .icon-moon{opacity:1;transform:rotate(0) scale(1);}
  html[data-theme="light"] .theme-toggle .icon-sun{opacity:1;transform:rotate(0) scale(1);color:var(--orange);}
  html[data-theme="light"] .theme-toggle .icon-moon{opacity:0;transform:rotate(90deg) scale(0.5);}

  @media (prefers-reduced-motion: reduce){
    .nav-btn-dot{animation:none;}
  }

  /* Yer daralınca önce admin butonunun yazısı gizlenir (sadece ikon kalır) —
     böylece tüm grup tek satırda kalma ihtimalini artırır */
  @media (max-width:1080px){
    .admin-btn-label{display:none;}
    .admin-btn{padding:8px;}
  }

  @media (max-width:860px){
    .nav-links{
      position:absolute;top:100%;left:0;right:0;
      flex-direction:column;background:var(--navy-900);
      padding:20px 28px;gap:18px;border-bottom:1px solid var(--navy-line);
      display:none;
    }
    .nav-links.open{display:flex;}
    .nav-toggle{display:block;}
  }

  @media (max-width:560px){
    .nav-actions{width:100%;order:3;justify-content:center;}
  }

  /* ---------- hero ---------- */
  .hero{
    min-height:100vh;
    display:flex;align-items:center;
    padding:140px 0 80px;
  }
  .hero-grid{
    display:grid;grid-template-columns:1.1fr 0.9fr;gap:60px;align-items:center;
  }
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-family:'JetBrains Mono',monospace;font-size:0.78rem;
    color:var(--orange-light);
    background:rgba(255,107,53,0.1);
    border:1px solid rgba(255,107,53,0.3);
    padding:6px 12px;border-radius:20px;
    margin-bottom:22px;
  }
  .eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--orange);box-shadow:0 0 8px var(--orange);animation:pulse 1.8s infinite;}
  @keyframes pulse{0%,100%{opacity:1;}50%{opacity:0.3;}}
  .hero h1{
    font-size:clamp(2.4rem,5vw,3.8rem);
    line-height:1.06;
    margin-bottom:22px;
  }
  .hero h1 .accent{color:var(--orange);}
  .hero p.lead{
    font-size:1.1rem;color:var(--text-mute);max-width:520px;margin-bottom:34px;
  }
  .hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:44px;}
  .btn-primary{
    background:var(--orange);color:var(--on-accent);
    padding:14px 26px;border-radius:9px;font-weight:600;
    display:inline-flex;align-items:center;gap:8px;
    transition:transform .15s ease, box-shadow .15s ease;
  }
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(255,107,53,0.4);}
  .btn-ghost{
    border:1px solid var(--navy-line);color:var(--text-main);
    padding:14px 26px;border-radius:9px;font-weight:600;
    transition:border-color .15s ease, background .15s ease;
  }
  .btn-ghost:hover{border-color:var(--orange);background:rgba(255,107,53,0.08);}
  .hero-stats{display:flex;gap:36px;}
  .hero-stats .stat-num{font-family:'Space Grotesk',sans-serif;font-size:1.5rem;font-weight:700;color:var(--orange-light);white-space:nowrap;}
  .hero-stats .stat-label{font-family:'JetBrains Mono',monospace;font-size:0.72rem;color:var(--text-mute);text-transform:uppercase;letter-spacing:0.04em;}

  .hero-visual{position:relative;display:flex;align-items:center;justify-content:center;}

  .scene-glow{
    position:absolute;top:50%;left:50%;width:70%;height:70%;
    transform:translate(-50%,-50%);
    background:radial-gradient(circle, rgba(255,107,53,0.22) 0%, rgba(94,200,232,0.08) 45%, transparent 72%);
    filter:blur(40px);
    z-index:0;pointer-events:none;
  }

  .scene3d{
    width:100%;max-width:480px;aspect-ratio:1/1;
    position:relative;z-index:1;
    perspective:1500px;
  }
  .orb-shadow{
    position:absolute;left:50%;bottom:8%;
    width:50%;height:34px;
    transform:translateX(-50%);
    background:radial-gradient(ellipse at center, rgba(0,0,0,0.55) 0%, transparent 72%);
    filter:blur(2px);
    z-index:0;
  }
  .scene3d-inner{
    position:relative;width:100%;height:100%;
    transform-style:preserve-3d;
    transform:rotateX(12deg) rotateY(-20deg);
    transition:transform .25s ease-out;
    will-change:transform;
  }

  /* floor grid for spatial depth */
  .floor-grid{
    position:absolute;left:50%;top:58%;width:160%;height:160%;
    transform:translate(-50%,-50%) translateZ(-110px) rotateX(78deg);
    background-image:
      repeating-linear-gradient(0deg, rgba(255,107,53,0.14) 0 1px, transparent 1px 42px),
      repeating-linear-gradient(90deg, rgba(255,107,53,0.14) 0 1px, transparent 1px 42px);
    -webkit-mask-image:radial-gradient(circle at center, black 0%, transparent 68%);
    mask-image:radial-gradient(circle at center, black 0%, transparent 68%);
    pointer-events:none;
  }

  /* ambient particles floating at varied depths */
  .particle{
    position:absolute;width:5px;height:5px;border-radius:50%;
    background:var(--orange-light);
    box-shadow:0 0 9px var(--orange-light);
    transform:translateZ(var(--z, 100px));
    animation:twinkle 3.4s ease-in-out infinite;
  }
  @keyframes twinkle{0%,100%{opacity:0.2;}50%{opacity:0.9;}}

  .orb-base{
    position:absolute;top:50%;left:50%;
    width:42%;aspect-ratio:1/1;
    transform:translate(-50%,-50%) translateZ(0px);
    border-radius:50%;
    background:radial-gradient(circle at 32% 26%, #24356a, #0a0f22 72%);
    border:1px solid var(--navy-line);
    box-shadow:0 34px 60px -22px rgba(0,0,0,0.65), 0 0 50px rgba(255,107,53,0.12);
    display:flex;align-items:center;justify-content:center;
    animation:orbIn .9s cubic-bezier(.2,.8,.2,1) both;
  }
  @keyframes orbIn{
    from{opacity:0;transform:translate(-50%,-50%) translateZ(0px) scale(0.55);}
    to{opacity:1;transform:translate(-50%,-50%) translateZ(0px) scale(1);}
  }
  .orb-logo{width:42%;filter:drop-shadow(0 8px 14px rgba(0,0,0,0.5));position:relative;z-index:3;}
  .orb-highlight{
    position:absolute;top:14%;left:20%;width:36%;height:26%;
    background:radial-gradient(ellipse at center, rgba(255,255,255,0.4), transparent 72%);
    border-radius:50%;filter:blur(1px);pointer-events:none;z-index:2;
  }
  .orb-ring{position:absolute;border-radius:50%;pointer-events:none;}
  .ring-outer{inset:-26%;border:1px dashed rgba(255,107,53,0.32);animation:spin 22s linear infinite;}
  .ring-inner{inset:-12%;border:1px dashed rgba(255,183,77,0.28);animation:spin 15s linear infinite reverse;}
  @keyframes spin{from{transform:rotate(0deg);}to{transform:rotate(360deg);}}

  /* electrons orbiting the sphere */
  .electron-ring{
    position:absolute;top:50%;left:50%;width:60%;aspect-ratio:1/1;
    transform:translate(-50%,-50%) rotateX(72deg) rotateZ(0deg);
    transform-style:preserve-3d;
    animation:ringSpin 9s linear infinite;
    pointer-events:none;z-index:2;
  }
  @keyframes ringSpin{
    from{transform:translate(-50%,-50%) rotateX(72deg) rotateZ(0deg);}
    to{transform:translate(-50%,-50%) rotateX(72deg) rotateZ(360deg);}
  }
  .electron{
    position:absolute;top:50%;left:50%;width:7px;height:7px;border-radius:50%;
    background:var(--orange-light);box-shadow:0 0 10px 2px var(--orange-light);
  }
  .e1{transform:translate(-50%,-50%) rotate(0deg) translateX(115px);}
  .e2{transform:translate(-50%,-50%) rotate(120deg) translateX(115px);background:#5ec8e8;box-shadow:0 0 10px 2px #5ec8e8;}
  .e3{transform:translate(-50%,-50%) rotate(240deg) translateX(115px);background:var(--orange);box-shadow:0 0 10px 2px var(--orange);}

  /* real rotating 3D cube — represents 3D Tasarım */
  .cube-orbit{
    position:absolute;top:6%;right:10%;width:54px;height:54px;
    transform:translateZ(230px);z-index:4;
  }
  .cube-spin{
    position:relative;width:100%;height:100%;
    transform-style:preserve-3d;
    animation:cubeSpin 10s linear infinite;
  }
  @keyframes cubeSpin{
    from{transform:rotateX(0deg) rotateY(0deg);}
    to{transform:rotateX(360deg) rotateY(360deg);}
  }
  .cube-face{
    position:absolute;width:54px;height:54px;
    border:1px solid rgba(94,200,232,0.55);
    background:linear-gradient(160deg, rgba(94,200,232,0.18), rgba(94,200,232,0.04));
    box-shadow:inset 0 0 14px rgba(94,200,232,0.2);
  }
  .face-front{transform:translateZ(27px);}
  .face-back{transform:translateZ(-27px) rotateY(180deg);}
  .face-right{transform:rotateY(90deg) translateZ(27px);}
  .face-left{transform:rotateY(-90deg) translateZ(27px);}
  .face-top{transform:rotateX(90deg) translateZ(27px);}
  .face-bottom{transform:rotateX(-90deg) translateZ(27px);}

  .float-card{position:absolute;width:44%;z-index:3;}
  .card-entrance{animation:cardIn .8s cubic-bezier(.2,.8,.2,1) both;}
  @keyframes cardIn{
    from{opacity:0;transform:translateY(28px) scale(0.85);}
    to{opacity:1;transform:translateY(0) scale(1);}
  }
  .bob{animation:bobMove 5s ease-in-out infinite;}
  @keyframes bobMove{0%,100%{transform:translateY(0);}50%{transform:translateY(-9px);}}

  .card-accent-bar{height:3px;width:26px;border-radius:2px;margin-bottom:9px;}
  .card-row{display:flex;align-items:center;gap:10px;}
  .card-text{display:flex;flex-direction:column;gap:2px;min-width:0;}
  .card-title{font-family:'Space Grotesk',sans-serif;font-weight:600;font-size:0.76rem;color:var(--text-main);white-space:nowrap;}
  .card-sub{font-family:'JetBrains Mono',monospace;font-size:0.6rem;color:var(--text-mute);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}

  .card-entrance{
    padding:12px 14px;border-radius:13px;
    background:linear-gradient(160deg, rgba(22,33,62,0.94), rgba(14,21,48,0.94));
    border:1px solid var(--navy-line);
    box-shadow:0 22px 42px -18px rgba(0,0,0,0.6);
    backdrop-filter:blur(6px);
  }

  .float-icon{
    width:32px;height:32px;border-radius:9px;flex-shrink:0;
    display:flex;align-items:center;justify-content:center;
  }

  .card-robotik{top:0%;left:-6%;transform:translateZ(120px) rotateY(10deg);}
  .card-robotik .float-icon{background:rgba(255,107,53,0.15);border:1px solid rgba(255,107,53,0.35);color:#ff6b35;}
  .card-robotik .card-accent-bar{background:#ff6b35;}
  .card-robotik .card-entrance{animation-delay:.15s;}
  .card-robotik .bob{animation-delay:0s;}

  .card-yazilim{top:40%;right:-10%;transform:translateZ(160px) rotateY(-8deg);}
  .card-yazilim .float-icon{background:rgba(255,183,77,0.15);border:1px solid rgba(255,183,77,0.35);color:#ffb74d;}
  .card-yazilim .card-accent-bar{background:#ffb74d;}
  .card-yazilim .card-entrance{animation-delay:.35s;}
  .card-yazilim .bob{animation-delay:1.3s;}

  .card-3d{bottom:-2%;left:8%;transform:translateZ(85px) rotateY(6deg);}
  .card-3d .float-icon{background:rgba(94,200,232,0.15);border:1px solid rgba(94,200,232,0.35);color:#5ec8e8;}
  .card-3d .card-accent-bar{background:#5ec8e8;}
  .card-3d .card-entrance{animation-delay:.55s;}
  .card-3d .bob{animation-delay:2.6s;}

  @media (prefers-reduced-motion: reduce){
    .ring-outer,.ring-inner,.particle,.bob,.card-entrance,.orb-base,.electron-ring,.cube-spin{animation:none !important;opacity:1 !important;}
  }

  @media (max-width:900px){
    .scene3d{max-width:320px;}
    .float-card{width:50%;}
    .card-title{font-size:0.7rem;}
    .card-sub{font-size:0.56rem;}
    .floor-grid{display:none;}
    .cube-orbit{width:38px;height:38px;top:2%;right:4%;transform:translateZ(140px);}
    .cube-face{width:38px;height:38px;}
    .face-front{transform:translateZ(19px);}
    .face-back{transform:translateZ(-19px) rotateY(180deg);}
    .face-right{transform:rotateY(90deg) translateZ(19px);}
    .face-left{transform:rotateY(-90deg) translateZ(19px);}
    .face-top{transform:rotateX(90deg) translateZ(19px);}
    .face-bottom{transform:rotateX(-90deg) translateZ(19px);}
    .electron-ring{width:70%;}
    .e1,.e2,.e3{transform:translate(-50%,-50%) rotate(0deg) translateX(70px);}
    .e2{transform:translate(-50%,-50%) rotate(120deg) translateX(70px);}
    .e3{transform:translate(-50%,-50%) rotate(240deg) translateX(70px);}

    /* iOS Safari can fail to render deeply nested animated preserve-3d layers —
       force final visible state and drop the animations on mobile */
    .orb-base{animation:none;opacity:1;}
    .card-entrance{animation:none;opacity:1;transform:none;}
    .cube-spin{animation:none;}
    .ring-outer,.ring-inner{animation:none;opacity:0.5;}
    .electron-ring{animation:none;}
    .particle{animation:none;opacity:0.5;}
    .bob{animation:none;}
  }

  /* ---------- section headers ---------- */
  .section-head{max-width:600px;margin:0 auto 56px;text-align:center;}
  .section-head .eyebrow{margin-bottom:16px;}
  .section-head h2{font-size:clamp(1.8rem,3.4vw,2.6rem);margin-bottom:14px;}
  .section-head p{color:var(--text-mute);font-size:1.02rem;}

  .panel{background:var(--navy-900);border:1px solid var(--navy-line);border-radius:16px;}

  /* ---------- about ---------- */
  #about{padding:110px 0;}
  .about-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
  .about-copy p{color:var(--text-mute);margin-bottom:18px;}
  .about-copy strong{color:var(--text-main);}
  .about-facts{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:28px;}
  .fact{padding:18px;border-radius:12px;background:var(--navy-800);border:1px solid var(--navy-line);}
  .fact .num{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:1.5rem;color:var(--orange-light);}
  .fact .lbl{font-size:0.85rem;color:var(--text-mute);margin-top:4px;}
  .about-visual{
    border-radius:18px;border:1px solid var(--navy-line);
    background:radial-gradient(circle at 30% 20%, rgba(255,167,105,0.35), transparent 60%), linear-gradient(160deg, #ffffff, #f2f4f9);
    aspect-ratio:16/10;position:relative;overflow:hidden;
    display:flex;align-items:center;justify-content:center;
    padding:40px;
    box-shadow:0 20px 50px -20px rgba(0,0,0,0.35);
  }
  .about-logo-img{width:100%;max-width:260px;height:auto;}

  /* ---------- achievements ---------- */
  #achievements{padding:100px 0;}
  .achieve-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
  .achieve-card{padding:26px 22px;text-align:left;transition:transform .2s ease, border-color .2s ease;}
  .achieve-card:hover{transform:translateY(-5px);border-color:var(--orange);}
  .achieve-icon{
    width:44px;height:44px;border-radius:11px;
    background:linear-gradient(135deg,rgba(255,107,53,0.2),rgba(255,183,77,0.08));
    border:1px solid rgba(255,107,53,0.3);
    display:flex;align-items:center;justify-content:center;
    margin-bottom:16px;
  }
  .achieve-card h4{font-size:1.02rem;margin-bottom:8px;}
  .achieve-card p{color:var(--text-mute);font-size:0.86rem;}

  @media (max-width:900px){
    .achieve-grid{grid-template-columns:1fr 1fr;}
  }
  @media (max-width:560px){
    .achieve-grid{grid-template-columns:1fr;}
  }

  /* ---------- level tabs (İlkokul/Ortaokul/Lise) ---------- */
  .level-tabs{
    display:flex;justify-content:center;gap:8px;
    margin-bottom:40px;flex-wrap:wrap;
  }
  .level-tab{
    background:var(--navy-800);border:1px solid var(--navy-line);color:var(--text-mute);
    padding:10px 26px;border-radius:24px;font-weight:600;font-size:0.9rem;
    cursor:pointer;transition:background-color .2s ease, border-color .2s ease, color .2s ease;
  }
  .level-tab:hover{color:var(--text-main);border-color:var(--orange-light);}
  .level-tab.active{
    background:var(--orange);border-color:var(--orange);color:var(--on-accent);
  }
  .level-panel{display:none;}
  .level-panel.active{display:block;}

  @media (max-width:700px){
    .course-grid-2{grid-template-columns:1fr;}
  }

  /* ---------- university programs (now nested inside #courses) ---------- */
  .program-subhead{text-align:center;margin-bottom:32px;}
  .program-subhead-tag{
    display:inline-block;
    font-family:'JetBrains Mono',monospace;font-size:0.75rem;
    color:var(--orange-light);
    background:rgba(255,107,53,0.08);
    border:1px solid rgba(255,107,53,0.28);
    padding:7px 16px;border-radius:20px;
    letter-spacing:0.03em;
  }
  .uni-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
  .uni-card{padding:32px 26px;display:flex;flex-direction:column;}
  .uni-card h3{font-size:1.15rem;margin-bottom:10px;}
  .uni-card p{color:var(--text-mute);font-size:0.9rem;margin-bottom:20px;flex-grow:1;}
  .uni-apply-btn{
    align-self:flex-start;
    font-family:'JetBrains Mono',monospace;font-size:0.78rem;
    color:var(--orange-light);
    border:1px solid rgba(255,107,53,0.35);
    padding:9px 16px;border-radius:20px;
    transition:background .15s ease, border-color .15s ease;
  }
  .uni-apply-btn:hover{background:rgba(255,107,53,0.1);border-color:var(--orange);}

  @media (max-width:900px){
    .uni-grid{grid-template-columns:1fr;}
  }

  /* ---------- background glyph watermarks (courses, achievements, uni cards) ---------- */
  .course-card,.achieve-card,.uni-card{position:relative;overflow:hidden;}
  .card-glyph{
    position:absolute;bottom:-22px;right:-22px;
    width:150px;height:150px;
    color:var(--orange);opacity:0.08;
    pointer-events:none;z-index:0;
  }
  .card-glyph svg{width:100%;height:100%;}
  .card-content{position:relative;z-index:1;}
  .course-card:hover .card-glyph,.achieve-card:hover .card-glyph,.uni-card:hover .card-glyph{opacity:0.12;}

  /* ---------- courses ---------- */
  #courses{padding:110px 0;}
  .course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
  .course-grid-2{grid-template-columns:repeat(2,1fr);max-width:760px;margin:0 auto;}
  .course-card{
    padding:32px 26px;position:relative;overflow:hidden;
    transition:transform .2s ease, border-color .2s ease;
  }
  .course-card:hover{transform:translateY(-6px);border-color:var(--orange);}
  .course-icon{
    width:52px;height:52px;border-radius:12px;
    background:linear-gradient(135deg,rgba(255,107,53,0.2),rgba(255,183,77,0.08));
    border:1px solid rgba(255,107,53,0.3);
    display:flex;align-items:center;justify-content:center;
    margin-bottom:22px;
  }
  .course-card h3{font-size:1.25rem;margin-bottom:10px;}
  .course-card p{color:var(--text-mute);font-size:0.95rem;margin-bottom:18px;}
  .course-tags{display:flex;gap:8px;flex-wrap:wrap;}
  .tag{
    font-family:'JetBrains Mono',monospace;font-size:0.7rem;
    padding:4px 10px;border-radius:6px;
    background:rgba(255,255,255,0.05);color:var(--text-mute);
    border:1px solid var(--navy-line);
  }

  /* ---------- mini reviews (inside About) ---------- */
  .mini-reviews{margin-top:26px;}
  .mini-review-head{
    display:flex;align-items:center;gap:8px;
    font-family:'JetBrains Mono',monospace;font-size:0.78rem;color:var(--text-mute);
    margin-bottom:12px;
  }
  .mini-review-head .stars{color:var(--orange-light);letter-spacing:1px;}
  .mini-review-card{
    padding:14px 16px;border-radius:10px;
    background:var(--navy-800);border:1px solid var(--navy-line);
    margin-bottom:10px;
  }
  .mini-review-card:last-child{margin-bottom:0;}
  .mini-review-card p{color:var(--text-main);font-size:0.86rem;font-style:italic;}

  /* ---------- gallery ---------- */
  #gallery{padding:110px 0;}
  .gallery-grid{
    display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:36px;
  }
  .gtile{
    border-radius:14px;position:relative;overflow:hidden;
    border:1px solid var(--navy-line);
    display:flex;align-items:flex-end;padding:18px;
    background:var(--navy-800);
    appearance:none;font:inherit;text-align:inherit;cursor:pointer;
    width:100%;aspect-ratio:4/5;
  }
  .gtile:focus-visible{outline:2px solid var(--orange);outline-offset:2px;}
  .gtile img{
    position:absolute;inset:0;width:100%;height:100%;
    object-fit:cover;transition:transform .4s ease;
  }
  .gtile:hover img{transform:scale(1.06);}
  .gtile::after{
    content:'';position:absolute;inset:0;z-index:1;
    background:linear-gradient(to top, rgba(10,15,34,0.85) 0%, rgba(10,15,34,0.15) 55%, transparent 80%);
  }
  .gtile span{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:1rem;color:#fff;position:relative;z-index:2;}
  .gallery-cta{text-align:center;}

  /* ---------- lightbox ---------- */
  .lightbox{
    position:fixed;inset:0;z-index:300;
    background:rgba(5,8,18,0.88);backdrop-filter:blur(6px);
    display:flex;align-items:center;justify-content:center;padding:24px;
    opacity:0;pointer-events:none;transition:opacity .25s ease;
  }
  .lightbox.open{opacity:1;pointer-events:auto;}
  .lightbox-inner{
    background:var(--navy-900);border:1px solid var(--navy-line);border-radius:18px;
    width:100%;max-width:900px;max-height:85vh;
    display:flex;flex-direction:column;overflow:hidden;
    box-shadow:0 30px 80px rgba(0,0,0,0.5);
    transform:translateY(16px) scale(0.97);transition:transform .25s ease;
  }
  .lightbox.open .lightbox-inner{transform:translateY(0) scale(1);}
  .lightbox-header{
    display:flex;align-items:center;justify-content:space-between;
    padding:18px 22px;border-bottom:1px solid var(--navy-line);flex-shrink:0;
  }
  .lightbox-title{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:1.1rem;}
  .lightbox-close{
    background:var(--navy-800);border:1px solid var(--navy-line);color:var(--text-main);
    width:34px;height:34px;border-radius:50%;cursor:pointer;font-size:1rem;
  }
  .lightbox-close:hover{border-color:var(--orange);}
  .lightbox-grid{
    padding:22px;overflow-y:auto;
    display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;
  }
  .lightbox-grid img{
    width:100%;height:200px;object-fit:cover;border-radius:10px;
    border:1px solid var(--navy-line);cursor:pointer;
    transition:transform .2s ease, border-color .2s ease;
  }
  .lightbox-grid img:hover{transform:scale(1.03);border-color:var(--orange);}
  .lightbox-empty{color:var(--text-mute);font-size:0.9rem;grid-column:1/-1;text-align:center;padding:30px 0;}

  @media (max-width:600px){
    .lightbox-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));}
    .lightbox-grid img{height:130px;}
  }

  /* ---------- photo viewer (fullscreen single image + nav) ---------- */
  .photo-viewer{
    position:fixed;inset:0;z-index:400;
    background:rgba(3,5,12,0.95);
    display:flex;align-items:center;justify-content:center;
    opacity:0;pointer-events:none;transition:opacity .2s ease;
  }
  .photo-viewer.open{opacity:1;pointer-events:auto;}
  .photo-viewer img{
    max-width:88vw;max-height:82vh;object-fit:contain;
    border-radius:8px;box-shadow:0 20px 60px rgba(0,0,0,0.6);
  }
  .pv-close{
    position:absolute;top:20px;right:20px;z-index:2;
    width:42px;height:42px;border-radius:50%;
    background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.25);
    color:#fff;font-size:1.1rem;cursor:pointer;
    display:flex;align-items:center;justify-content:center;
    transition:background .15s ease, border-color .15s ease;
  }
  .pv-close:hover{background:rgba(255,107,53,0.25);border-color:var(--orange);}
  .pv-nav{
    position:absolute;top:50%;transform:translateY(-50%);z-index:2;
    width:48px;height:48px;border-radius:50%;
    background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.25);
    color:#fff;cursor:pointer;
    display:flex;align-items:center;justify-content:center;
    transition:background .15s ease, border-color .15s ease, transform .15s ease;
  }
  .pv-nav:hover{background:rgba(255,107,53,0.25);border-color:var(--orange);}
  .pv-prev{left:16px;}
  .pv-next{right:16px;}
  .pv-counter{
    position:absolute;bottom:20px;left:50%;transform:translateX(-50%);
    font-family:'JetBrains Mono',monospace;font-size:0.78rem;color:rgba(255,255,255,0.75);
    background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.2);
    padding:5px 14px;border-radius:14px;
  }

  @media (max-width:600px){
    .pv-nav{width:40px;height:40px;}
    .pv-prev{left:8px;}
    .pv-next{right:8px;}
    .pv-close{top:14px;right:14px;width:38px;height:38px;}
  }

  /* ---------- contact ---------- */
  #contact{padding:110px 0 130px;}
  .contact-grid{display:grid;grid-template-columns:0.9fr 1.1fr;gap:40px;}
  .info-card{padding:30px;margin-bottom:20px;}
  .info-row{display:flex;gap:14px;margin-bottom:20px;}
  .info-row:last-child{margin-bottom:0;}
  .info-ico{
    width:38px;height:38px;border-radius:10px;flex-shrink:0;
    background:rgba(255,107,53,0.12);border:1px solid rgba(255,107,53,0.3);
    display:flex;align-items:center;justify-content:center;
  }
  .info-row h4{font-size:0.95rem;margin-bottom:3px;}
  .info-row p{color:var(--text-mute);font-size:0.88rem;}
  .hours-table{width:100%;font-size:0.88rem;}
  .hours-table td{padding:6px 0;border-bottom:1px solid var(--navy-line);color:var(--text-mute);}
  .hours-table td:last-child{text-align:right;color:var(--text-main);font-family:'JetBrains Mono',monospace;}
  .map-card{padding:18px;}
  .map-card-head{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    margin-bottom:14px;
  }
  .map-card-head h4{font-size:0.95rem;margin-bottom:3px;}
  .map-card-head p{font-size:0.8rem;color:var(--text-mute);}
  .map-open-btn{
    font-family:'JetBrains Mono',monospace;font-size:0.7rem;white-space:nowrap;
    color:var(--orange-light);
    border:1px solid rgba(255,107,53,0.35);
    padding:7px 12px;border-radius:20px;
    transition:background .15s ease, border-color .15s ease;
  }
  .map-open-btn:hover{background:rgba(255,107,53,0.1);border-color:var(--orange);}
  .map-embed{border-radius:12px;overflow:hidden;border:1px solid var(--navy-line);height:200px;}
  .map-embed iframe{width:100%;height:200px;border:0;filter:grayscale(0.3) contrast(1.1);}

  .whatsapp-btn{
    margin-top:20px;
    display:flex;align-items:center;justify-content:center;gap:10px;
    background:#25D366;color:#0a0f22;
    padding:14px 22px;border-radius:9px;font-weight:600;
    transition:transform .15s ease, box-shadow .15s ease;
  }
  .whatsapp-btn:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(37,211,102,0.35);}

  .register-btn{
    margin-top:12px;
    display:flex;align-items:center;justify-content:center;gap:10px;
    border:1px solid rgba(255,107,53,0.4);color:var(--orange-light);
    padding:13px 22px;border-radius:9px;font-weight:600;font-size:0.92rem;
    transition:background .15s ease, border-color .15s ease, transform .15s ease;
  }
  .register-btn:hover{background:rgba(255,107,53,0.1);border-color:var(--orange);transform:translateY(-2px);}

  .floating-whatsapp{
    position:fixed;bottom:24px;right:24px;z-index:150;
    width:56px;height:56px;border-radius:50%;
    background:#25D366;color:#0a0f22;
    display:flex;align-items:center;justify-content:center;
    box-shadow:0 8px 24px rgba(0,0,0,0.4), 0 0 0 rgba(37,211,102,0.5);
    transition:transform .2s ease, box-shadow .2s ease;
    animation:whatsappPulse 2.6s ease-in-out infinite;
  }
  .floating-whatsapp:hover{transform:scale(1.08);}
  @keyframes whatsappPulse{
    0%,100%{box-shadow:0 8px 24px rgba(0,0,0,0.4), 0 0 0 0 rgba(37,211,102,0.45);}
    50%{box-shadow:0 8px 24px rgba(0,0,0,0.4), 0 0 0 10px rgba(37,211,102,0);}
  }
  @media (prefers-reduced-motion: reduce){
    .floating-whatsapp{animation:none;}
  }
  @media (max-width:600px){
    .floating-whatsapp{width:50px;height:50px;bottom:16px;right:16px;}
  }

  /* ---------- AI assistant widget ---------- */
  .assistant-launcher{
    position:fixed;bottom:92px;right:24px;z-index:150;
    display:flex;align-items:center;gap:10px;
  }
  .assistant-label{
    background:var(--navy-800);border:1px solid var(--navy-line);
    color:var(--text-main);font-size:0.78rem;font-weight:600;
    padding:8px 14px;border-radius:20px;white-space:nowrap;
    box-shadow:0 6px 18px rgba(0,0,0,0.35);
    animation:labelFloat 3s ease-in-out infinite;
  }
  @keyframes labelFloat{0%,100%{transform:translateY(0);}50%{transform:translateY(-4px);}}

  .floating-assistant{
    width:56px;height:56px;border-radius:50%;flex-shrink:0;
    background:linear-gradient(135deg,var(--orange),var(--orange-light));
    color:var(--on-accent);border:none;cursor:pointer;
    display:flex;align-items:center;justify-content:center;
    box-shadow:0 8px 24px rgba(0,0,0,0.4);
    transition:transform .2s ease;
  }
  .floating-assistant:hover{transform:scale(1.08);}

  .assistant-title-badge{
    display:inline-block;
    font-family:'JetBrains Mono',monospace;font-size:0.6rem;font-weight:700;
    background:var(--orange);color:var(--on-accent);
    padding:1px 6px;border-radius:6px;margin-left:6px;vertical-align:middle;
  }

  .assistant-panel{
    position:fixed;bottom:160px;right:24px;z-index:160;
    width:360px;max-width:calc(100vw - 32px);
    height:520px;max-height:70vh;
    background:var(--navy-900);border:1px solid var(--navy-line);
    border-radius:16px;box-shadow:0 24px 60px rgba(0,0,0,0.55);
    display:flex;flex-direction:column;overflow:hidden;
    opacity:0;transform:translateY(16px) scale(0.96);pointer-events:none;
    transition:opacity .2s ease, transform .2s ease;
  }
  .assistant-panel.open{opacity:1;transform:translateY(0) scale(1);pointer-events:auto;}

  .assistant-header{
    display:flex;align-items:center;justify-content:space-between;
    padding:14px 16px;border-bottom:1px solid var(--navy-line);
    background:var(--navy-800);flex-shrink:0;
  }
  .assistant-header-info{display:flex;align-items:center;gap:10px;}
  .assistant-avatar{width:32px;height:32px;object-fit:contain;}
  .assistant-title{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:0.92rem;}
  .assistant-status{display:flex;align-items:center;gap:5px;font-size:0.72rem;color:var(--text-mute);}
  .assistant-status-dot{width:6px;height:6px;border-radius:50%;background:#4ade80;box-shadow:0 0 6px #4ade80;}
  .assistant-close{background:none;border:none;color:var(--text-mute);font-size:1.1rem;cursor:pointer;padding:4px;line-height:1;}
  .assistant-close:hover{color:var(--text-main);}

  .assistant-messages{
    flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:10px;
  }
  .msg{max-width:84%;padding:10px 13px;border-radius:12px;font-size:0.85rem;line-height:1.45;}
  .msg.bot{align-self:flex-start;background:var(--navy-800);border:1px solid var(--navy-line);border-bottom-left-radius:3px;color:var(--text-main);}
  .msg.user{align-self:flex-end;background:var(--orange);color:var(--on-accent);border-bottom-right-radius:3px;font-weight:500;}
  .msg a{color:var(--orange-light);text-decoration:underline;}
  .msg.user a{color:var(--on-accent);}

  .assistant-chips{display:flex;gap:8px;padding:0 16px 10px;flex-wrap:wrap;flex-shrink:0;}
  .assistant-chip{
    font-family:'JetBrains Mono',monospace;font-size:0.7rem;
    background:rgba(255,107,53,0.08);border:1px solid rgba(255,107,53,0.3);
    color:var(--orange-light);padding:6px 11px;border-radius:14px;
    cursor:pointer;transition:background .15s ease;white-space:nowrap;
  }
  .assistant-chip:hover{background:rgba(255,107,53,0.16);}

  .assistant-input-row{
    display:flex;gap:8px;padding:12px 14px;border-top:1px solid var(--navy-line);flex-shrink:0;
  }
  .assistant-input-row input{
    flex:1;background:var(--navy-800);border:1px solid var(--navy-line);
    border-radius:20px;padding:10px 14px;color:var(--text-main);font-size:0.86rem;
    outline:none;min-width:0;
  }
  .assistant-input-row input:focus{border-color:var(--orange);}
  .assistant-input-row button{
    width:38px;height:38px;border-radius:50%;flex-shrink:0;
    background:var(--orange);color:var(--on-accent);border:none;cursor:pointer;
    display:flex;align-items:center;justify-content:center;
    transition:transform .15s ease;
  }
  .assistant-input-row button:hover{transform:scale(1.08);}

  @media (prefers-reduced-motion: reduce){
    .assistant-label{animation:none;}
  }

  @media (max-width:600px){
    .assistant-launcher{bottom:76px;right:16px;gap:8px;}
    .floating-assistant{width:50px;height:50px;}
    .assistant-label{font-size:0.7rem;padding:6px 11px;}
  }

  @media (max-width:480px){
    .assistant-label{display:none;}
    .assistant-panel{
      right:8px;bottom:136px;
      width:calc(100vw - 16px);height:66vh;
    }
  }

  .contact-form{padding:22px 24px;}
  .form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px;align-items:start;}
  .form-group{margin-bottom:14px;box-sizing:border-box;}
  .form-group label{
    display:block;font-family:'JetBrains Mono',monospace;font-size:0.7rem;
    color:var(--text-mute);margin-bottom:6px;text-transform:uppercase;letter-spacing:0.03em;
  }
  .form-group input{
    width:100%;height:44px;background:var(--navy-800);border:1px solid var(--navy-line);
    border-radius:8px;padding:0 12px;color:var(--text-main);box-sizing:border-box;
    font-family:'Inter',sans-serif;font-size:0.9rem;
    transition:border-color .15s ease, box-shadow .15s ease;
  }
  .form-group textarea{
    width:100%;background:var(--navy-800);border:1px solid var(--navy-line);
    border-radius:8px;padding:10px 12px;color:var(--text-main);box-sizing:border-box;
    font-family:'Inter',sans-serif;font-size:0.9rem;
    transition:border-color .15s ease, box-shadow .15s ease;
  }
  .form-group input::placeholder,.form-group textarea::placeholder{color:#6b7494;}
  .form-group input:focus,.form-group textarea:focus{
    outline:none;border-color:var(--orange);box-shadow:0 0 0 3px rgba(255,107,53,0.15);
  }
  .form-group textarea{resize:vertical;min-height:64px;max-height:160px;}
  .form-footer{
    display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:4px;
  }
  .form-submit{border:none;cursor:pointer;font-size:0.9rem;padding:11px 22px;flex-shrink:0;}
  .form-submit:disabled{opacity:0.6;cursor:not-allowed;transform:none;}
  .form-status{
    font-size:0.8rem;font-family:'JetBrains Mono',monospace;
    line-height:1.3;
  }
  .form-status.success{color:#4ade80;}
  .form-status.error{color:#f87171;}

  @media (max-width:520px){
    .form-row{grid-template-columns:1fr;}
    .form-footer{flex-direction:column-reverse;align-items:stretch;}
    .form-submit{width:100%;justify-content:center;}
  }

  /* ---------- footer ---------- */
  footer{
    border-top:1px solid var(--navy-line);
    padding:36px 0;
  }
  .footer-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px;}
  .footer-inner p{color:var(--text-mute);font-size:0.85rem;}
  .footer-social{display:flex;gap:14px;}
  .footer-social a{
    width:38px;height:38px;border-radius:10px;border:1px solid var(--navy-line);
    display:flex;align-items:center;justify-content:center;
    transition:border-color .15s ease, background .15s ease;
  }
  .footer-social a:hover{border-color:var(--orange);background:rgba(255,107,53,0.1);}

  /* scroll reveal */
  .reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease, transform .7s ease;}
  .reveal.in{opacity:1;transform:translateY(0);}

  @media (max-width:900px){
    .hero-grid{grid-template-columns:1fr;}
    .hero-visual{order:-1;max-width:280px;margin:0 auto 20px;}
    .about-grid{grid-template-columns:1fr;}
    .about-visual{order:-1;aspect-ratio:16/9;}
    .course-grid{grid-template-columns:1fr;}
    .gallery-grid{grid-template-columns:1fr;}
    .gtile{aspect-ratio:16/10;}
    .contact-grid{grid-template-columns:1fr;}
    #circuit-svg{display:none;}
  }