:root {
  --bg0: #0f1c24;
  --bg1: #1a2f3a;
  --card: #f4f7f5;
  --ink: #142028;
  --muted: #5a6b74;
  --accent: #0d7a5f;
  --accent-2: #e8a317;
  --err: #b42318;
  --radius: 14px;
  --font: "IBM Plex Sans", system-ui, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(ellipse 80% 60% at 10% 0%, #1e4a3c 0%, transparent 55%),
    radial-gradient(ellipse 70% 50% at 100% 100%, #2a3d55 0%, transparent 50%),
    linear-gradient(160deg, var(--bg0), var(--bg1));
  display: grid;
  place-items: center;
  padding: 1.5rem;
}

.card {
  width: min(400px, 100%);
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem 1.5rem;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
}

.brand-row {
  display: flex;
  gap: 0.9rem;
  align-items: center;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background:
    linear-gradient(135deg, var(--accent), #1a9b78 55%, var(--accent-2));
}

.eyebrow {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
}

h1 {
  margin: 0.15rem 0 0;
  font-size: 1.45rem;
  font-weight: 700;
}

.sub {
  margin: 0.85rem 0 1.25rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.form {
  display: grid;
  gap: 0.65rem;
}

input {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border: 1px solid #c5d0d6;
  border-radius: 10px;
  font: inherit;
  background: #fff;
}

input:focus {
  outline: 2px solid color-mix(in srgb, var(--accent) 45%, white);
  border-color: var(--accent);
}

.btn {
  margin-top: 0.25rem;
  padding: 0.75rem 1rem;
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.btn:hover { filter: brightness(1.06); }

.error {
  min-height: 1.25rem;
  margin: 0.85rem 0 0;
  color: var(--err);
  font-size: 0.9rem;
}