:root {
  --bg: #0d0b1a;
  --bg-glow: #1a1535;
  --card: #16132b;
  --border: #2a2450;
  --text: #ece9fb;
  --muted: #9b93c4;
  --accent: #7b5cff;
  --accent-hover: #8f74ff;
  --danger: #ff6b8a;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
}

body {
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(1000px 600px at 50% -10%, var(--bg-glow), transparent 70%),
    var(--bg);
  color: var(--text);
  font: 400 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.card {
  width: 100%;
  max-width: 380px;
  padding: 40px 32px 32px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .5);
  text-align: center;
}

.glyph {
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  display: grid;
  place-items: center;
  color: var(--accent);
  background: rgba(123, 92, 255, .12);
  border-radius: 16px;
}
.glyph svg { width: 30px; height: 30px; }

h1 {
  margin: 0 0 6px;
  font-size: 1.5rem;
  font-weight: 650;
  letter-spacing: -.02em;
}

.sub {
  margin: 0 0 26px;
  color: var(--muted);
  font-size: .95rem;
}

input {
  width: 100%;
  padding: 14px 16px;
  margin-bottom: 12px;
  font-size: 1rem;
  color: var(--text);
  background: #100d22;
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: border-color .15s, box-shadow .15s;
}
input::placeholder { color: #6b648f; }
input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(123, 92, 255, .22);
}

button {
  width: 100%;
  padding: 14px 16px;
  font: inherit;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: background .15s, transform .08s;
}
button:hover:not(:disabled) { background: var(--accent-hover); }
button:active:not(:disabled) { transform: translateY(1px); }
button:disabled { opacity: .6; cursor: default; }

.error {
  margin: 14px 0 0;
  padding: 10px 14px;
  font-size: .9rem;
  color: var(--danger);
  background: rgba(255, 107, 138, .1);
  border: 1px solid rgba(255, 107, 138, .25);
  border-radius: 10px;
}

.hint {
  margin: 22px 0 0;
  font-size: .82rem;
  color: #6b648f;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}