:root {
  --primary: #38bdf6;
  --text: #fff;
  --bg: #242424;
  --error: #ff4d4d;
  --input-bg: #2a2f3a;
  --header-bg: rgb(15 23 42 / 95%);
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Poppins', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  background: var(--header-bg);
  padding: 1.25rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text);
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: 600;
}

.logo i {
  color: var(--primary);
}

.login-container {
  width: min(400px, 100% - 2rem);
  margin: 6rem auto;
  padding: 2rem;
}

h2 {
  text-align: center;
  margin-bottom: 2rem;
  font-size: 1.5rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
}

.form-group input {
  width: 100%;
  padding: 0.75rem;
  background: var(--input-bg);
  border: 1px solid #475a6f;
  border-radius: 0.25rem;
  color: var(--text);
  transition: border-color 0.2s;
}

.form-group input:focus {
  border-color: var(--primary);
  outline: none;
}

.error-message {
  color: var(--error);
  background: rgba(255, 77, 77, 0.1);
  padding: 0.75rem;
  border-radius: 0.25rem;
  margin-bottom: 1rem;
}

.btn {
  width: 100%;
  padding: 0.75rem;
  background: var(--primary);
  color: var(--text);
  border: none;
  border-radius: 0.5rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s;
}

.btn:hover {
  opacity: 0.9;
}

.mt-3 {
    margin-top: 1.5rem;
    text-align: start;
    font-size: small;
}

.mt-3 a {
  color: var(--primary);
  text-decoration: none;
}

footer {
  margin-top: auto;
  padding: 1.25rem;
  text-align: center;
  background: rgba(0, 0, 0, 0.8);
}

@media (max-width: 48em) {
  .login-container {
    margin: 3rem auto;
  }
}