:root{
  --page-bg:#c9c5c5;
  --ink:#222;
  --muted:#555;
  --rule:#ddd;
  --card:#f7f7f7;
  --card-bg:#f7f7f7;
  --accent:#f2442e;
  --primary:#7fd3d4;
  --radius:16px;
  --shadow:0 4px 16px rgba(0,0,0,.1);
  --shadow-soft:0 4px 16px rgba(0,0,0,.1);
}


*{ box-sizing:border-box; }
html{ background:var(--page-bg,#c9c5c5); color:var(--ink,#222); }
img, video{ max-width:100%; height:auto; display:block; }

main{
  width:min(92vw, 920px);
  margin:2rem auto;
  padding:0 1rem;
  display:grid;
  gap:1.25rem;
}

main > header{ text-align:center; }
main > header h1{
  font-size:clamp(28px,4vw,40px);
  font-weight:800;
  line-height:1.1;
  margin:0 0 .35rem;
}
main > header p{ color:var(--muted,#555); }

main > section{
  background:var(--card,#f7f7f7);
  border-radius:var(--radius,12px);
  box-shadow:var(--shadow,0 4px 12px rgba(0,0,0,.08));
  padding:1rem .95rem;
}
main > section h2{
  font-size:clamp(18px,2.4vw,22px);
  margin:.1rem 0 .6rem;
  line-height:1.25;
  padding-bottom:.35rem;
  position:relative;
}
main > section h2::after{
  content:"";
  display:block; width:64px; height:3px; margin-top:.35rem;
  background:var(--accent,#f2442e); border-radius:999px;
}


section[aria-labelledby="intro-video"]{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  text-align:center;
  padding:1rem;
}

section[aria-labelledby="intro-video"] video{
  margin:1rem auto;
  max-width:100%;
  height:auto;
  border-radius:12px;
  box-shadow:var(--shadow, 0 4px 12px rgba(0,0,0,.08));
}

section[aria-labelledby="intro-video"] small{
  color:var(--muted,#555);
  display:block;
  margin-top:.5rem;
}

section[aria-labelledby="contact-form"]{
  max-width:min(92vw, 920px);
  margin-inline:auto;
}

section[aria-labelledby="contact-form"] > h2{
  text-align:center;
}

section[aria-labelledby="contact-form"] form{
  display:grid;
  gap:1rem;
}

section[aria-labelledby="contact-form"] fieldset{
  border:1px solid var(--rule,#ddd);
  border-radius:12px;
  padding:.9rem;
  background:var(--card-bg, var(--card, #f7f7f7));
  box-shadow:var(--shadow-soft, 0 4px 12px rgba(0,0,0,.08));
}
section[aria-labelledby="contact-form"] legend{
  font-weight:700;
  padding:0 .35rem;
}

section[aria-labelledby="contact-form"] fieldset:first-of-type{
  display:grid;
  gap:.8rem;
}

section[aria-labelledby="contact-form"] label{
  display:inline-block;
  font-weight:600;
  margin-bottom:.25rem;
}

section[aria-labelledby="contact-form"] input,
section[aria-labelledby="contact-form"] textarea{
  width:100%;
  padding:.7rem .8rem;
  border:1px solid var(--rule,#ddd);
  border-radius:10px;
  background:#fff;
  font:inherit;
  color:inherit;
  outline:none;
  transition:border-color .15s ease, box-shadow .15s ease, background-color .2s ease;
  box-shadow:0 1px 0 rgba(0,0,0,.02);
}

section[aria-labelledby="contact-form"] input::placeholder,
section[aria-labelledby="contact-form"] textarea::placeholder{
  color:#9a9a9a;
}

section[aria-labelledby="contact-form"] input:focus,
section[aria-labelledby="contact-form"] textarea:focus {
  outline: none;
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--primary,#7fd3d4) 30%, transparent);
}

:root:not([data-theme="dark"])
  section[aria-labelledby="contact-form"] input:invalid,
:root:not([data-theme="dark"])
  section[aria-labelledby="contact-form"] textarea:invalid{
  border-color:color-mix(in oklab, var(--accent,#f2442e) 70%, #000 10%);
  box-shadow:0 0 0 2px color-mix(in oklab, var(--accent,#f2442e) 35%, transparent);
  background-color:#ffffff;
}

:root[data-theme="dark"]
  section[aria-labelledby="contact-form"] input:invalid,
:root[data-theme="dark"]
  section[aria-labelledby="contact-form"] textarea:invalid{
  border-color:color-mix(in oklab, var(--accent,#f2442e) 70%, #000 20%);
  box-shadow:0 0 0 2px color-mix(in oklab, var(--accent,#f2442e) 45%, transparent);
  background-color:color-mix(
    in oklab,
    var(--page-bg,#020617) 80%,
    var(--accent,#f2442e) 15%
  );
}

:root[data-theme="dark"]
  section[aria-labelledby="contact-form"] input,
:root[data-theme="dark"]
  section[aria-labelledby="contact-form"] textarea{
  background-color:color-mix(
    in oklab,
    var(--page-bg,#020617) 85%,
    #000 15%
  );
  color:var(--ink,#e5e7eb);
}

section[aria-labelledby="contact-form"] > form > p em{
  color:var(--muted,#555);
}
section[aria-labelledby="contact-form"] > form > p:last-of-type{
  text-align:center;
}

.btn-send{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  padding:.8rem 1.25rem;
  border:0;
  border-radius:999px;
  background:var(--primary,#7fd3d4);
  color:#111;
  font-weight:800;
  cursor:pointer;
  box-shadow:0 8px 18px rgba(0,0,0,.15), inset 0 -2px 0 rgba(0,0,0,.08);
  transition:transform .15s ease, box-shadow .15s ease, background-color .2s ease;
}
.btn-send .icon{
  width:20px; height:20px; transition:transform .15s ease;
}
.btn-send:hover,
.btn-send:focus-visible{
  background:color-mix(in oklab, var(--primary,#7fd3d4) 85%, #000 15%);
  transform:translateY(-2px);
  box-shadow:0 12px 26px rgba(0,0,0,.18), inset 0 -2px 0 rgba(0,0,0,.1);
  outline:none;
}
.btn-send:hover .icon,
.btn-send:focus-visible .icon{
  transform:translateX(2px);
}
.btn-send:active{
  transform:translateY(-1px);
  box-shadow:0 10px 20px rgba(0,0,0,.16);
}
.btn-send:disabled{
  opacity:.6;
  cursor:not-allowed;
  transform:none;
  box-shadow:0 4px 12px rgba(0,0,0,.08);
}

@keyframes press {
  0% { transform: scale(1); }
  50% { transform: scale(0.95); }
  100% { transform: scale(1); }
}
.btn-send:active{ animation:press .2s ease; }

section[aria-labelledby="contact-form"] #thanksDialog{
  border:0;
  border-radius:14px;
  padding:1rem 1rem .9rem;
  box-shadow:0 18px 40px rgba(0,0,0,.22);
  width:min(92vw, 420px);
}
section[aria-labelledby="contact-form"] #thanksDialog p{
  margin:.25rem 0 .75rem;
  text-align:center;
}
section[aria-labelledby="contact-form"] #thanksDialog button{
  display:block;
  margin:0 auto;
  padding:.55rem 1.1rem;
  border:0;
  border-radius:10px;
  background:var(--accent,#f2442e);
  color:#fff;
  font-weight:700;
  cursor:pointer;
}
section[aria-labelledby="contact-form"] #thanksDialog::backdrop{
  background:rgba(0,0,0,.35);
}

:root[data-theme="dark"]
section[aria-labelledby="contact-form"] form:has(input:valid, textarea:valid){
  border-radius:var(--radius);
  box-shadow:0 0 12px color-mix(in oklab, var(--primary) 40%, transparent);
}

section[aria-labelledby="contact-form"] .messages{
  margin-top:.5rem;
  display:grid;          
  gap:.25rem;
  min-height:2.4rem;     
}

section[aria-labelledby="contact-form"] #error-output,
section[aria-labelledby="contact-form"] #info-output{
  display:block;         
  font-size:.9rem;
  line-height:1.3;
}

section[aria-labelledby="contact-form"] #error-output{
  color:var(--accent,#f2442e);
  font-weight:600;
}

section[aria-labelledby="contact-form"] #info-output{
  color:var(--muted,#555);
}

@media (min-width: 720px){
  section[aria-labelledby="contact-form"] fieldset:first-of-type{
    grid-template-columns:repeat(2, minmax(0,1fr));
    align-items:start;
  }
  section[aria-labelledby="contact-form"] fieldset:first-of-type > p{ margin:0; }
}

@media (min-width:1025px){
  main{ width:min(92vw, 1000px); gap:1.25rem; }
}

@media (max-width:480px){
  .btn-send{ width:min(420px, 100%); }
}

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