:root {
  color-scheme: dark;
  font-family: "Noto Sans", system-ui, sans-serif;
  background: #0d1514;
  color: #efe8d2;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  padding: 2rem 1rem;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(99, 117, 77, .28), transparent 58%),
    linear-gradient(145deg, #111b18, #0a100f 70%);
}

main {
  width: min(100%, 440px);
  padding: clamp(1.5rem, 6vw, 2.75rem);
  border: 1px solid rgba(197, 166, 105, .48);
  border-radius: 14px;
  background: rgba(14, 24, 21, .94);
  box-shadow: 0 24px 90px rgba(0, 0, 0, .48);
}

.brand {
  color: #cfb477;
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .24em;
  text-decoration: none;
}

h1 {
  margin: .65rem 0 1.5rem;
  color: #f4edda;
  font-size: clamp(1.65rem, 6vw, 2.15rem);
  font-weight: 650;
}

form {
  display: grid;
  gap: 1rem;
}

label {
  display: grid;
  gap: .42rem;
  color: #d4ceb9;
  font-size: .9rem;
}

label.checkbox {
  display: flex;
  align-items: center;
  gap: .65rem;
}

label.checkbox input {
  width: 1.15rem;
  min-height: 1.15rem;
  margin: 0;
  accent-color: #c5a669;
}

input {
  width: 100%;
  min-height: 2.9rem;
  padding: .7rem .8rem;
  border: 1px solid #47574d;
  border-radius: 7px;
  outline: none;
  background: #101a17;
  color: #fbf6e8;
  font: inherit;
}

input:focus {
  border-color: #c5a669;
  box-shadow: 0 0 0 3px rgba(197, 166, 105, .16);
}

button {
  min-height: 3rem;
  margin-top: .35rem;
  border: 1px solid #b6965b;
  border-radius: 7px;
  background: #40563e;
  color: #fff8e7;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
}

button:hover {
  background: #53674b;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem 1rem;
  margin-top: 1.3rem;
  font-size: .87rem;
}

a {
  color: #d6bd83;
}

a:hover {
  color: #f0dbab;
}

.notice {
  margin: 0 0 1rem;
  padding: .8rem .9rem;
  border: 1px solid #8a754c;
  border-radius: 7px;
  background: rgba(72, 60, 37, .35);
  line-height: 1.5;
}

.notice.error {
  border-color: #9c5c4e;
  background: rgba(93, 42, 34, .32);
}

.notice.success {
  border-color: #678260;
  background: rgba(45, 73, 45, .35);
}

.hint {
  margin: 1rem 0 0;
  color: #aaa894;
  font-size: .83rem;
  line-height: 1.5;
}

#feedback:empty {
  display: none;
}