:root {
  color-scheme: dark;
  --bg: #091018;
  --panel: rgba(18, 25, 34, 0.92);
  --border: #243143;
  --text: #edf2f7;
  --muted: #92a1b5;
  --accent: #78c4ff;
  --danger-bg: rgba(255, 139, 122, 0.12);
  --danger-border: rgba(255, 139, 122, 0.45);
  --danger-text: #ffc9bf;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  font-family: "IBM Plex Sans", "Avenir Next", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(120, 196, 255, 0.12), transparent 26%),
    linear-gradient(180deg, #050a10 0%, var(--bg) 100%);
}

.shell {
  width: min(100%, 460px);
}

.panel {
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 32px;
  background: var(--panel);
  backdrop-filter: blur(18px);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: 40px;
  letter-spacing: -0.04em;
}

.subhead,
.footnote {
  color: var(--muted);
  line-height: 1.6;
}

.subhead {
  margin: 12px 0 24px;
}

.login-form {
  display: grid;
  gap: 16px;
}

.login-form label {
  display: grid;
  gap: 8px;
  font-size: 14px;
}

.login-form input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: #0f1620;
  color: var(--text);
  padding: 14px 16px;
  font: inherit;
}

.login-form input:focus {
  outline: 2px solid rgba(120, 196, 255, 0.3);
  border-color: var(--accent);
}

.primary-button {
  appearance: none;
  border: 1px solid rgba(120, 196, 255, 0.3);
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(120, 196, 255, 0.18), rgba(120, 196, 255, 0.1));
  color: var(--text);
  padding: 12px 18px;
  cursor: pointer;
  font: inherit;
  font-weight: 600;
}

.primary-button:hover {
  border-color: var(--accent);
}

.alert {
  margin-bottom: 16px;
  border: 1px solid var(--danger-border);
  border-radius: 16px;
  padding: 12px 14px;
  color: var(--danger-text);
  background: var(--danger-bg);
}

.hidden {
  display: none;
}

.footnote {
  margin: 20px 0 0;
  font-size: 13px;
}