:root {
  color-scheme: light dark;
  font-family: "Geist Variable", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top, rgba(64, 140, 255, 0.18), transparent 42%),
    linear-gradient(180deg, #f4f7fb 0%, #e7edf5 100%);
  color: #162033;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background: inherit;
  color: inherit;
}

.auth-container {
  width: min(100%, 420px);
  padding: 32px;
  border: 1px solid rgba(22, 32, 51, 0.08);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 24px 70px rgba(25, 42, 72, 0.16);
  backdrop-filter: blur(18px);
}

h1 {
  margin: 0 0 10px;
  font-size: 1.9rem;
  line-height: 1.05;
}

.auth-subtitle,
.auth-footer {
  margin: 0 0 24px;
  color: #52607a;
  line-height: 1.5;
}

.auth-footer {
  margin-top: 18px;
  margin-bottom: 0;
  font-size: 0.95rem;
}

.auth-footer a {
  color: inherit;
  font-weight: 600;
}

.form-group {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
}

label {
  font-size: 0.92rem;
  font-weight: 600;
}

input {
  width: 100%;
  border: 1px solid rgba(22, 32, 51, 0.14);
  border-radius: 14px;
  padding: 13px 14px;
  background: rgba(255, 255, 255, 0.92);
  color: inherit;
  font: inherit;
}

input:focus {
  outline: 2px solid rgba(64, 140, 255, 0.35);
  outline-offset: 2px;
  border-color: rgba(64, 140, 255, 0.45);
}

.btn-primary {
  width: 100%;
  border: 0;
  border-radius: 14px;
  padding: 14px 16px;
  background: linear-gradient(135deg, #2449ff 0%, #1d77d4 100%);
  color: #fff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.btn-primary:disabled {
  cursor: wait;
  opacity: 0.72;
}

.form-error {
  margin-bottom: 16px;
  border: 1px solid rgba(214, 59, 59, 0.16);
  border-radius: 14px;
  padding: 12px 14px;
  background: rgba(214, 59, 59, 0.08);
  color: #a12626;
}

.hidden {
  display: none;
}

@media (prefers-color-scheme: dark) {
  :root {
    background:
      radial-gradient(circle at top, rgba(87, 120, 255, 0.2), transparent 42%),
      linear-gradient(180deg, #0d1322 0%, #121a2e 100%);
    color: #eef3ff;
  }

  .auth-container {
    border-color: rgba(255, 255, 255, 0.08);
    background: rgba(13, 19, 34, 0.76);
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
  }

  .auth-subtitle,
  .auth-footer {
    color: #adb8d4;
  }

  input {
    border-color: rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.04);
  }

  .form-error {
    border-color: rgba(255, 133, 133, 0.18);
    background: rgba(214, 59, 59, 0.12);
    color: #ff9d9d;
  }
}