* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: Arial, sans-serif;
  background: #f0f2f5;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 1rem;
}
.auth-container {
  background: #fff;
  width: 100%;
  max-width: 360px;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.auth-title {
  text-align: center;
  margin-bottom: .5rem;
  font-size: 1.5rem;
  color: #333;
}
.auth-subtitle {
  text-align: center;
  margin-bottom: 1.5rem;
  color: #666;
  font-size: .9rem;
}
.form-row {
  margin-bottom: 1rem;
}
.form-row label {
  display: block;
  margin-bottom: .4rem;
  font-size: .9rem;
  color: #444;
}
.form-row input,
.form-row select {
  width: 100%;
  padding: .6rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: .95rem;
}
.btn {
  display: block;
  width: 100%;
  padding: .7rem;
  background-color: #007bff;
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: 1rem;
  cursor: pointer;
  margin-top: .5rem;
  text-align: center;
  text-decoration: none;
}
.btn:disabled {
  background: #aaa;
  cursor: default;
}
.otp-row {
  margin-top: 1rem;
}
.hidden {
  display: none;
}
.error {
  color: #b00020;
  text-align: center;
  margin-bottom: 1rem;
  font-size: .9rem;
}
.home-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 2rem;
}
.home-links .btn {
  text-align: center;
  padding: 0.8rem 1.5rem;
  font-size: 1.1rem;
  background-color: #007bff;
  color: white;
  text-decoration: none;
  border-radius: 4px;
  transition: background-color 0.2s;
}
.home-links .btn:hover {
  background-color: #0056b3;
}

/* Media Queries for Responsive Design */
@media screen and (max-width: 480px) {
  html, body {
    height: 100%;
    min-height: 100dvh;
    width: 100vw;
    padding: 0;
    margin: 0;
    background: #f0f2f5;
  }
  body {
    display: block;
    min-height: 100dvh;
    width: 100vw;
  }
  .auth-container {
    height: 100dvh;
    min-height: 100dvh;
    width: 100vw;
    max-width: 100vw;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 16px rgba(0,0,0,0.10);
    border-radius: 0;
    padding: 2.2rem 1rem;
    margin: 0;
    background: #fff;
  }
  .auth-title {
    font-size: 2rem;
    margin-bottom: 1rem;
    text-align: center;
  }
  .auth-subtitle {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    text-align: center;
  }
  .form-row {
    margin-bottom: 1.3rem;
  }
  .form-row label {
    font-size: 1.05rem;
  }
  .form-row input,
  .form-row select {
    font-size: 18px;
    padding: 1rem 0.7rem;
  }
  .btn {
    font-size: 19px;
    padding: 1.1rem 0.5rem;
    border-radius: 8px;
    margin-top: 0.7rem;
  }
  .home-links {
    margin-top: 1.2rem;
    gap: 0.7rem;
    width: 100%;
  }
  .home-links .btn {
    font-size: 1.1rem;
    padding: 1rem 1.2rem;
    border-radius: 7px;
  }
  .otp-row {
    margin-top: 1.2rem;
  }
}

/* For very small screens */
@media screen and (max-width: 320px) {
  .auth-container {
    padding: 0.7rem;
    min-height: 220px;
  }
  .auth-title {
    font-size: 1.1rem;
  }
  .home-links {
    gap: 0.5rem;
  }
}