:root {
  --primary: #38bdf8;
  --primary-dark: #0284c7;
  --primary-soft: #f0f9ff;
  --primary-border: #bae6fd;
  --text: #0f172a;
  --muted: #64748b;
  --border: #dbeafe;
  --danger: #e11d48;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
}

body {
  align-items: center;
  background:
    radial-gradient(circle at 10% 15%, rgba(125, 211, 252, 0.45), transparent 28%),
    radial-gradient(circle at 90% 85%, rgba(147, 197, 253, 0.38), transparent 30%),
    #f8fbff;
  color: var(--text);
  display: flex;
  font-family: Arial, sans-serif;
  justify-content: center;
  margin: 0;
  min-height: 100vh;
  padding: 24px;
}

.auth-card {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(219, 234, 254, 0.9);
  border-radius: 22px;
  box-shadow: 0 24px 70px rgba(2, 132, 199, 0.16);
  max-width: 440px;
  padding: 36px;
  width: 100%;
}

.brand {
  align-items: center;
  color: var(--text);
  display: inline-flex;
  font-size: 21px;
  font-weight: 800;
  gap: 10px;
  text-decoration: none;
}

.brand-icon {
  align-items: center;
  background: var(--primary);
  border-radius: 11px;
  box-shadow: 0 7px 15px rgba(56, 189, 248, 0.25);
  color: var(--white);
  display: inline-flex;
  height: 40px;
  justify-content: center;
  width: 40px;
}

.brand-accent {
  color: var(--primary-dark);
}

.auth-card h1 {
  font-size: 27px;
  letter-spacing: -0.8px;
  margin: 28px 0 8px;
}

.auth-card > p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
  margin: 0 0 25px;
}

.message {
  border-radius: 10px;
  font-size: 13px;
  margin-bottom: 18px;
  padding: 12px 14px;
}

.message.error {
  background: #fff1f2;
  border: 1px solid #fecdd3;
  color: #be123c;
}

.message.success {
  background: #f0f9ff;
  border: 1px solid var(--primary-border);
  color: #0369a1;
}

.form-group {
  margin-bottom: 17px;
}

label {
  color: #334155;
  display: block;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 7px;
}

input {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  outline: none;
  padding: 13px 14px;
  transition: 0.2s;
  width: 100%;
}

input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.15);
}

.auth-button {
  background: var(--primary);
  border: 0;
  border-radius: 10px;
  box-shadow: 0 10px 18px rgba(56, 189, 248, 0.22);
  color: var(--white);
  cursor: pointer;
  font-size: 14px;
  font-weight: 800;
  margin-top: 7px;
  padding: 14px;
  transition: 0.2s;
  width: 100%;
}

.auth-button:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

.auth-footer {
  color: var(--muted);
  font-size: 13px;
  margin: 22px 0 0;
  text-align: center;
}

.auth-footer a {
  color: var(--primary-dark);
  font-weight: 800;
  text-decoration: none;
}

.auth-footer a:hover {
  text-decoration: underline;
}

.back-link {
  color: var(--muted);
  display: block;
  font-size: 13px;
  margin-top: 18px;
  text-align: center;
  text-decoration: none;
}

.back-link:hover {
  color: var(--primary-dark);
}

@media (max-width: 480px) {
  .auth-card {
    padding: 28px 22px;
  }
}
.form-hint {
  display: block;
  margin-top: 5px;
  color: #64748b;
  font-size: 12px;
  line-height: 1.45;
}