*{margin:0;padding:0;box-sizing:border-box}

:root{
  --ted-red:#e62b1e;
  --ink:rgba(0,0,0,.86);
  --muted:rgba(0,0,0,.65);
  --glass:rgba(255,255,255,.72);
  --border:rgba(0,0,0,.08);
  --shadow:0 16px 45px rgba(0,0,0,.12);
  --kraft-1:#d6b98c;
  --kraft-2:#e3c99b;
  --kraft-3:#caa46c;
}

body{
  font-family:"Helvetica Neue",Arial,sans-serif;
  color:#000;
  background:#f7f7f7;
}

.bg{
  position:fixed;
  inset:0;
  z-index:-1;
  background-image:
    radial-gradient(circle at 20% 10%,rgba(255,255,255,.78),rgba(255,255,255,.25) 45%,rgba(255,255,255,.1) 70%),
    linear-gradient(to bottom,rgba(255,255,255,.5),rgba(255,255,255,.2)),
    url("images/background.png");
  background-size:cover;
  background-position:center;
  background-repeat:no-repeat;
}

.container{
  width:90%;
  max-width:1200px;
  margin:0 auto;
}

.header{
  position:sticky;
  top:0;
  z-index:50;
  padding:18px 0;
  background:var(--glass);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}

.header-inner{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:18px;
}

.logo{
  font-weight:900;
  font-size:28px;
  letter-spacing:.02em;
  color:var(--ink);
}

.nav{
  display:flex;
  gap:18px;
  flex-wrap:wrap;
  justify-content:flex-end;
}

.nav a{
  text-decoration:none;
  color:rgba(0,0,0,.78);
  font-size:13px;
  letter-spacing:.12em;
  padding:10px 10px;
  border-radius:999px;
  transition:transform .15s ease,background .15s ease,color .15s ease;
}

.nav a:hover{
  background:rgba(0,0,0,.06);
  color:rgba(0,0,0,.95);
  transform:translateY(-1px);
}

.hero{
  display:grid;
  grid-template-columns:1.15fr 1fr;
  align-items:center;
  min-height:72vh;
  padding-top:45px;
  gap:32px;
}

.theme{
  font-size:14px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--muted);
  margin-bottom:14px;
}

.hero h1{
  font-size:clamp(56px,7vw,92px);
  font-weight:900;
  letter-spacing:.015em;
  line-height:.92;
}

.hero-paragraph{
  margin-top:18px;
  max-width:56ch;
  line-height:1.7;
  color:var(--muted);
  position:relative;
  padding-left:14px;
}

.hero-paragraph::before{
  content:"";
  position:absolute;
  left:0;
  top:.35em;
  width:4px;
  height:1.2em;
  background:var(--ted-red);
  border-radius:99px;
}


.about{margin-top:64px}

.about h1{
  font-size:28px;
  margin-bottom:16px;
  color:var(--ink);
}

.about h1 span{color:var(--ted-red)}

.about h2{
  max-width: none;       
  width: 100%;
  line-height: 1.75;
  font-size: 18px;
}

.directors{margin:90px auto 110px}

.directors h2{
  font-size:28px;
  margin-bottom:42px;
  color:var(--ink);
}

.envelope-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:38px;
  align-items:start;
  margin-top:10px;
}

.envelope{
  position:relative;
  width:100%;
  max-width:520px;
  height:280px;
  border:none;
  background:transparent;
  cursor:pointer;
  border-radius:22px;
  padding:0;
  overflow:hidden;
  perspective:900px;
  transition:transform .18s ease;
}

.envelope:hover{transform:translateY(-6px)}

.env-back{
  position:absolute;
  inset:0;
  background:var(--kraft-1);
  border-radius:22px;
  z-index:1;
  box-shadow:0 18px 50px rgba(0,0,0,.14);
}

.env-paper{
  position:absolute;
  left:10%;
  top:0;
  width:80%;
  height:84%;
  background:#fff;
  border-radius:12px;
  z-index:5;
  box-shadow:0 10px 24px rgba(0,0,0,.16);
  transition:transform .6s ease;
  transform:translateY(74%);
}

.env-front{
  position:absolute;
  inset:0;
  border-radius:22px;
  z-index:6;
  overflow:hidden;
  background:transparent;
  pointer-events:none;
}

.env-front::before,
.env-front::after{
  content:"";
  position:absolute;
  inset:0;
  background:var(--kraft-2);
}

.env-front::before{
  clip-path:polygon(0 0,50% 58%,0 100%);
  filter:brightness(.97);
}

.env-front::after{
  clip-path:polygon(100% 0,50% 58%,100% 100%);
  filter:brightness(.95);
}

.env-front .pocket{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:64%;
  background:var(--kraft-2);
}

.env-front .pocket::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(to top,rgba(0,0,0,.18),rgba(0,0,0,0));
  opacity:.34;
}

.env-flap{
  position:absolute;
  top:0;
  left:0;
  width:100%;
  height:58%;
  background:var(--kraft-3);
  clip-path:polygon(0 0,100% 0,50% 72%);
  transform-origin:top;
  transform:rotateX(0deg);
  transition:transform .6s ease;
  z-index:7;
  border-top-left-radius:22px;
  border-top-right-radius:22px;
}

.env-text{
  position:absolute;
  left:18px;
  right:18px;
  bottom:18px;
  z-index:8;
  pointer-events:none;
  display:grid;
  gap:6px;
  padding:14px;
  border-radius:16px;
  background:rgba(255,255,255,.26);
  border:1px solid rgba(255,255,255,.35);
  backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);
}

.env-kicker{
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:rgba(0,0,0,.62);
}

.env-to{
  font-weight:900;
  font-size:18px;
  color:rgba(0,0,0,.84);
}

.env-from{
  font-size:13px;
  color:rgba(0,0,0,.65);
  letter-spacing:.04em;
}

.envelope:hover .env-flap{transform:rotateX(-120deg)}
.envelope:hover .env-paper{
  transform: translateY(4%);
}

.modal{
  position:fixed;
  inset:0;
  display:none;
  z-index:200;
}

.modal.is-open{display:block}

.modal-backdrop{
  position:absolute;
  inset:0;
  background:rgba(0,0,0,.35);
  backdrop-filter:blur(4px);
  -webkit-backdrop-filter:blur(4px);
}

.modal-panel{
  position:absolute;
  left:50%;
  top:50%;
  width:min(860px,92vw);
  max-height:min(80vh,720px);
  transform:translate(-50%,-50%);
  background:rgba(255,255,255,.92);
  border:1px solid rgba(255,255,255,.35);
  border-radius:22px;
  box-shadow:var(--shadow);
  overflow:hidden;
}

.modal-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 18px 14px;
  border-bottom:1px solid rgba(0,0,0,.06);
}

.modal-kicker{
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:rgba(0,0,0,.55);
}

.modal-title{
  font-size:18px;
  font-weight:900;
  color:var(--ink);
  margin-top:6px;
}

.modal-close{
  border:0;
  background:rgba(0,0,0,.06);
  width:42px;
  height:42px;
  border-radius:12px;
  cursor:pointer;
  font-size:18px;
  color:rgba(0,0,0,.75);
}

.modal-close:hover{background:rgba(0,0,0,.1)}

.letter{padding:22px 22px 26px}

.letter-meta{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:16px;
  color:rgba(0,0,0,.68);
}

.letter-from{
  font-weight:900;
  color:rgba(0,0,0,.78);
}

.letter-date{
  font-size:13px;
  color:rgba(0,0,0,.6);
}

.letter-line{
  height:1px;
  background:rgba(0,0,0,.08);
  margin-top:12px;
}

.letter-body{
  margin-top:16px;
  white-space:pre-wrap;
  line-height:1.75;
  color:rgba(0,0,0,.78);
  max-height:calc(min(80vh,720px) - 170px);
  overflow:auto;
  padding-right:6px;
}

:root{
  --kraft-1:#2c2c2c;
  --kraft-2:#343434;
  --kraft-3:#e62b1e;
}

.env-back{
  background:linear-gradient(160deg,#3a3a3a,#262626);
  box-shadow:
    0 14px 32px rgba(0,0,0,.32);
}

.env-front::before,
.env-front::after{
  background:#343434;
}

.env-front .pocket{
  background:#343434;
}

.env-flap{
  background:linear-gradient(160deg,#e62b1e,#ff3b30);
}

.env-paper{
  background:#ffffff;
}

.env-text{
  background:rgba(0,0,0,.32);
  border:1px solid rgba(255,255,255,.22);
}

.env-kicker,
.env-from{
  color:rgba(255,255,255,.78);
}

.env-to{
  color:#ffffff;
}

/* 🔥 stronger, obvious TEDx glow */
.envelope{
  box-shadow:
    0 14px 34px rgba(0,0,0,.35);
}

.envelope:hover{
  box-shadow:
    0 24px 60px rgba(0,0,0,.45),
    0 0 42px rgba(230,43,30,.55),
    0 0 80px rgba(230,43,30,.25);
}

.envelope:hover .env-flap{
  box-shadow:
    0 0 28px rgba(230,43,30,.75),
    inset 0 -1px 0 rgba(255,255,255,.25);
}

.bg::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(circle at 28% 22%, rgba(230,43,30,.28), transparent 58%),
    radial-gradient(circle at 72% 78%, rgba(230,43,30,.20), transparent 62%),
    radial-gradient(circle at 50% 50%, rgba(230,43,30,.12), transparent 70%),
    linear-gradient(to bottom, rgba(0,0,0,.32), rgba(0,0,0,.52));
}


.hero-image img{
  margin-top: -30%;
  width:100%;
  max-width:600px;
  height: 100%;
  max-height: 800px;
}

.hero h1.glow-title{
  background: linear-gradient(90deg,#e62b1e,#ff4b40,#ffd1ce,#ff4b40,#e62b1e);
  background-size: 400% 100%;
  background-position: 0% 50%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: textShift 6s ease-in-out infinite;
}

.hero-image img{
  width:auto !important;
  max-width:550px !important;
  height:auto !important;
  max-height:none !important;
  margin-top:15% !important;
  margin-left: 15%;
}


@keyframes textShift{
  0%{ background-position: 0% 50%; }
  50%{ background-position: 100% 50%; }
  100%{ background-position: 0% 50%; }
}

.hero .theme{
  color:rgba(255,255,255,.9);
}

.hero-paragraph,
.about {
  color:rgba(255,255,255,.9);
}

.site-footer{
  width:100%;
  margin-top:120px;
  display:flex;
  justify-content:center;
  align-items:center;
  overflow:hidden;
}

.site-footer img{
  width:120%;        
  max-width:none;   
  height:auto;
}

@media (max-width:900px){
  .hero{grid-template-columns:1fr;min-height:auto}
  .hero-image img{margin:18px 0 0;max-width:520px}
  .envelope-grid{grid-template-columns:1fr}
}

@media (max-width: 600px){

  body{
    overflow-x:hidden;
  }

  .container{
    width:92%;
  }

  .logo{
    font-size:20px;
  }

  .nav{
    gap:8px;
  }

  .nav a{
    font-size:11px;
    padding:6px 8px;
  }

  .hero{
    grid-template-columns:1fr;
    gap:20px;
    padding-top:20px;
    text-align:center;
  }

  .hero h1{
    font-size:42px;
    line-height:1.05;
  }

  .hero-paragraph{
    font-size:14px;
    max-width:100%;
    padding-left:0;
  }

  .hero-paragraph::before{
    display:none;
  }

  .hero-image img{
    margin:20px auto 0 !important;
    max-width:85% !important;
  }

  .about h1{
    font-size:22px;
  }

  .about h2{
    font-size:15px;
  }

  .directors h2{
    font-size:22px;
    text-align:center;
  }

  .envelope{
    height:220px;
    max-width:100%;
  }

  .env-to{
    font-size:16px;
  }

  .env-from{
    font-size:12px;
  }

  .modal-panel{
    width:94vw;
    max-height:85vh;
  }

  .letter-body{
    font-size:14px;
  }

  .site-footer img{
    width:140%;
  }
}

.hamburger{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:28px;
  height:22px;
  background:none;
  border:none;
  cursor:pointer;
  padding:0;
}

.hamburger span{
  width:100%;
  height:3px;
  background:#000;
  border-radius:3px;
  transition:0.3s ease;
}

@media (max-width:600px){

  .header{
    position:relative;
  }

  .nav{
    display:none;
    position:absolute;
    top:100%;
    left:0;
    width:100%;
    background:rgba(255,255,255,0.98);
    backdrop-filter:blur(10px);
    flex-direction:column;
    align-items:center;
    gap:18px;
    padding:22px 0;
    box-shadow:0 10px 25px rgba(0,0,0,0.1);
  }

  .nav.open{
    display:flex;
  }

  .nav a{
    font-size:14px;
  }

  .hamburger{
    display:flex;
  }
}