:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #101827;
  color: #f8fafc;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 12% 18%, #3b82f633 0 0, transparent 28rem),
    radial-gradient(circle at 88% 82%, #14b8a633 0 0, transparent 24rem),
    linear-gradient(135deg, #0b1120, #172554 54%, #0f172a);
}

.card {
  width: min(29rem, calc(100% - 3rem));
  padding: clamp(2.25rem, 6vw, 4rem);
  border: 1px solid #ffffff1f;
  border-radius: 1.5rem;
  background: #0f172ab8;
  box-shadow: 0 1.5rem 5rem #0206178c, inset 0 1px #ffffff0d;
  backdrop-filter: blur(1rem);
}

.mark {
  display: block;
  width: .75rem;
  height: .75rem;
  margin-bottom: 2rem;
  border-radius: 999px;
  background: linear-gradient(135deg, #5eead4, #60a5fa);
  box-shadow: 0 0 1.5rem #5eead499;
}

.eyebrow {
  margin: 0 0 .8rem;
  color: #a5b4fc;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .2em;
}

h1 {
  margin: 0;
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  line-height: .98;
  letter-spacing: -.065em;
}

.message {
  margin: 1.25rem 0 0;
  color: #cbd5e1;
  font-size: 1.05rem;
  line-height: 1.65;
}

.sign-in {
  display: grid;
  gap: .55rem;
  margin-top: 2.25rem;
}

label {
  margin-top: .7rem;
  color: #cbd5e1;
  font-size: .9rem;
  font-weight: 600;
}

input {
  width: 100%;
  min-height: 3.25rem;
  padding: .75rem .9rem;
  border: 1px solid #ffffff20;
  border-radius: .75rem;
  outline: none;
  background: #02061775;
  color: inherit;
  font: inherit;
  transition: border-color .16s ease, box-shadow .16s ease;
}

input:focus {
  border-color: #60a5fa;
  box-shadow: 0 0 0 .22rem #60a5fa28;
}

button {
  min-height: 3.25rem;
  margin-top: 1.25rem;
  border: 0;
  border-radius: .75rem;
  background: linear-gradient(135deg, #60a5fa, #6366f1);
  color: #fff;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  transition: filter .16s ease, transform .16s ease;
}

button:hover { filter: brightness(1.08); }
button:active { transform: translateY(1px); }

.form-message {
  margin: .75rem 0 0;
  color: #fda4af;
  font-size: .9rem;
}

@media (max-width: 28rem) {
  .card { width: calc(100% - 2rem); }
}