:root {
  color-scheme: dark;
  --background: #06111f;
  --panel: #0b1d30;
  --panel-soft: #102942;
  --line: #294761;
  --text: #f3f7fb;
  --muted: #a7bbcb;
  --accent: #61d4cf;
  --danger: #ff9baa;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 18%, rgba(36, 108, 139, .28), transparent 33rem),
    radial-gradient(circle at 88% 82%, rgba(36, 133, 117, .2), transparent 30rem),
    var(--background);
}

main {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  width: min(520px, 100%);
  padding: clamp(28px, 6vw, 48px);
  border: 1px solid var(--line);
  border-radius: 22px;
  background: linear-gradient(150deg, rgba(16, 41, 66, .98), rgba(7, 23, 39, .98));
  box-shadow: 0 28px 90px rgba(0, 0, 0, .38);
}

.brand { display: flex; align-items: center; gap: 14px; margin-bottom: 42px; }
.brand div { display: grid; gap: 2px; }
.brand strong { font-size: 18px; letter-spacing: .02em; }
.brand span:not(.mark) { color: var(--muted); font-size: 12px; }

.mark {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border: 1px solid #47718e;
  border-radius: 13px;
  color: var(--accent);
  background: #091827;
  font-weight: 800;
}

.eyebrow { margin: 0 0 10px; color: var(--accent); font-size: 12px; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
h1 { margin: 0; font-size: clamp(28px, 6vw, 40px); line-height: 1.08; letter-spacing: -.035em; }
.intro { margin: 18px 0 32px; color: var(--muted); line-height: 1.65; }
label { display: block; margin-bottom: 8px; color: #d7e4ee; font-size: 13px; font-weight: 700; }

.suffix-field {
  display: flex;
  align-items: center;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: #071522;
}

.suffix-field:focus-within { outline: 2px solid var(--accent); outline-offset: 2px; }
input { min-width: 0; flex: 1; padding: 13px 4px 13px 14px; border: 0; outline: 0; color: var(--text); background: transparent; font: inherit; }
.suffix-field span { padding: 0 14px 0 0; color: #7893a7; white-space: nowrap; }

button {
  width: 100%;
  margin-top: 18px;
  padding: 13px 16px;
  border: 0;
  border-radius: 11px;
  color: #052022;
  background: var(--accent);
  font: 800 15px inherit;
  cursor: pointer;
}

button:hover { filter: brightness(1.07); }
button:focus-visible { outline: 3px solid #fff; outline-offset: 3px; }
.error { margin: 10px 0 0; color: var(--danger); font-size: 13px; line-height: 1.45; }
.note { margin: 25px 0 0; color: #7893a7; font-size: 12px; line-height: 1.55; text-align: center; }

@media (max-width: 500px) {
  .suffix-field { display: block; }
  .suffix-field span { display: block; padding: 0 14px 12px; }
}