:root {
  --bg-1: #f8fbff;
  --bg-2: #eaf2ff;
  --text: #0f172a;
  --muted: #475569;
  --line: #dbe3ef;
  --ok: #0f766e;
  --error: #b42318;
  --card: #ffffff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", "Arial", sans-serif;
  color: var(--text);
  min-height: 100vh;
  background:
    radial-gradient(circle at 85% -5%, #c4dcff 0%, rgba(196,220,255,0) 38%),
    linear-gradient(170deg, var(--bg-1), var(--bg-2));
}

.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 16px;
}

.auth-card {
  width: 100%;
  max-width: 430px;
  background: var(--card);
  border-radius: 18px;
  border: 1px solid var(--line);
  box-shadow: 0 24px 48px rgba(15, 23, 42, 0.08);
  padding: 20px;
}

.auth-header {
  text-align: center;
  margin-bottom: 18px;
}

.auth-logo {
  width: 62px;
  height: 62px;
  object-fit: cover;
  border-radius: 50%;
  border: 2px solid #fff;
  box-shadow: 0 8px 16px rgba(2, 6, 23, 0.2);
}

.auth-header h1 {
  margin: 12px 0 8px;
  font-size: 1.3rem;
}

.auth-header p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.auth-form { display: grid; gap: 12px; }

.form-group { display: grid; gap: 6px; }

label {
  font-size: 0.88rem;
  color: #334155;
}

input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
  font-size: 0.95rem;
  outline: none;
}

input:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(31, 111, 235, 0.16);
}

.btn {
  border: none;
  border-radius: 12px;
  padding: 12px;
  font-weight: 600;
  cursor: pointer;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
}

.btn-primary:hover { filter: brightness(0.96); }

.auth-alert {
  border-radius: 12px;
  padding: 10px 12px;
  font-size: 0.88rem;
  margin-bottom: 12px;
}

.auth-alert-info { background: #eef6ff; color: #1e3a8a; }
.auth-alert-ok { background: #e8fff8; color: var(--ok); }
.auth-alert-error { background: #fff0f0; color: var(--error); }

.row-between {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

a {
  color: var(--brand);
  text-decoration: none;
  font-size: 0.88rem;
}

a:hover { text-decoration: underline; }

.auth-footer {
  text-align: center;
  margin-top: 14px;
  color: #64748b;
}

@media (min-width: 720px) {
  .auth-card { padding: 26px; }
  .auth-header h1 { font-size: 1.45rem; }
}