:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Noto Sans JP", sans-serif;
  color: #243c32;
  background: #f6f8f4;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  padding: 32px;
}
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 60px;
}
.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  font-size: 23px;
  font-weight: 700;
}
.mark {
  display: grid;
  place-items: center;
  background: #396d59;
  color: white;
  border-radius: 11px;
  width: 38px;
  height: 38px;
  font-family: Georgia;
  font-size: 39px;
}
.badge {
  font-size: 10px;
  letter-spacing: 0.12em;
  color: #7b8f7d;
}
.gate {
  max-width: 500px;
  margin: 6vh auto;
  background: #fff;
  border: 1px solid #e5eae2;
  border-radius: 24px;
  padding: 38px;
}
.symbol {
  font-size: 46px;
  color: #72916f;
}
h1 {
  font-size: 30px;
  line-height: 1.55;
  letter-spacing: -0.035em;
  overflow-wrap: anywhere;
}
p {
  color: #72816e;
  font-size: 14px;
  line-height: 1.9;
}
form {
  margin: 28px 0;
}
label {
  font-size: 12px;
  display: block;
  margin-bottom: 8px;
}
input,
button {
  font: inherit;
  font-size: 15px;
  width: 100%;
  border-radius: 10px;
  min-height: 50px;
}
input {
  border: 1px solid #d6dfd4;
  padding: 12px;
}
button {
  background: #396d59;
  border: 0;
  color: white;
  font-weight: 600;
  cursor: pointer;
}
button:disabled {
  opacity: 0.6;
}
input:focus-visible,
button:focus-visible,
video:focus-visible {
  outline: 3px solid #a5c49c;
  outline-offset: 3px;
}
small {
  display: block;
  color: #8a9886;
  font-size: 11px;
  line-height: 1.8;
}
.error {
  color: #b5543d;
}
.error:empty {
  display: none;
}
.viewer {
  max-width: 1280px;
  margin: 0 auto;
}
.viewer header {
  margin-bottom: 35px;
}
.viewer h1 {
  font-size: 24px;
  margin-bottom: 0;
}
.viewer video {
  display: block;
  width: 100%;
  max-height: calc(100dvh - 250px);
  min-height: 180px;
  background: #14271e;
  border-radius: 16px;
  margin-top: 24px;
}
.foot {
  text-align: center;
  font-size: 12px;
  letter-spacing: 0.1em;
}
@media (max-width: 600px) {
  body {
    padding: 16px;
  }
  .gate {
    padding: 24px;
    margin: 24px auto;
  }
  h1 {
    font-size: 25px;
  }
  header {
    margin-bottom: 36px;
  }
  .viewer video {
    border-radius: 10px;
  }
  .badge {
    display: none;
  }
}