:root {
  color-scheme: light;
  --bg: #eef2f4;
  --surface: #ffffff;
  --text: #14202b;
  --muted: #657383;
  --line: #d9e1e8;
  --accent: #0e8f8d;
  --shadow: 0 14px 34px rgba(18, 31, 43, 0.09);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 12%, rgba(14, 143, 141, 0.12), transparent 24%),
    radial-gradient(circle at 90% 10%, rgba(47, 111, 237, 0.1), transparent 22%),
    var(--bg);
}

.auth-shell {
  width: min(520px, calc(100vw - 28px));
}

.auth-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow);
  padding: 20px;
}

.eyebrow {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
}

h1, p {
  margin: 0;
}

h1 {
  margin-top: 6px;
  font-size: 30px;
}

#loginHint,
.foot-note,
.feedback {
  color: var(--muted);
}

#loginHint {
  margin-top: 8px;
}

.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 18px 0 14px;
}

.tab {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f7f9fb;
  padding: 11px;
}

.tab.is-active {
  color: #fff;
  border-color: transparent;
  background: var(--accent);
}

.panel {
  display: none;
}

.panel.is-active {
  display: block;
}

.field {
  display: grid;
  gap: 8px;
  margin-bottom: 14px;
}

.field span {
  color: var(--muted);
  font-size: 13px;
}

input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
}

.btn {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 11px 14px;
}

.btn.primary {
  width: 100%;
  border-color: transparent;
  color: #fff;
  background: var(--accent);
}

.foot-note {
  margin-top: 14px;
  font-size: 13px;
}

.feedback {
  margin-top: 10px;
  min-height: 20px;
  font-size: 13px;
}