:root {
  --primary-color: #4361ee;
  --text-color: #333;
  --background-color: #f4f4f9;
  --card-background: #ffffff;
  --error-color: #f72585;
  --border-color: #e0e0e0;
  --shadow-color: rgba(0, 0, 0, 0.08);
  --success-color: #4caf50;
  --input-background: #ffffff;
  --input-border: #e0e0e0;
  --input-text: #333;
  --icon-color: #999;
  --forgot-password-color: #4361ee;
  --modal-background: #ffffff;
  --transition-speed: 0.3s;
}

/* Dark mode variables */
[data-theme="dark"] {
  --primary-color: #4361ee;
  --text-color: #e9ecef;
  --background-color: #1a1d21;
  --card-background: #2d3238;
  --error-color: #f06595;
  --border-color: #495057;
  --shadow-color: rgba(0, 0, 0, 0.3);
  --success-color: #4fd1c5;
  --input-background: #343a40;
  --input-border: #495057;
  --input-text: #e9ecef;
  --icon-color: #adb5bd;
  --forgot-password-color: #4361ee;
  --modal-background: #2d3238;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: "Nunito Sans", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background-color: var(--background-color);
  padding: 20px;
  transition: background-color var(--transition-speed);
}

.login-container {
  background: var(--card-background);
  padding: 40px 30px;
  border-radius: 8px;
  box-shadow: 0 4px 20px var(--shadow-color);
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
  transition: background-color var(--transition-speed),
    box-shadow var(--transition-speed);
  color: var(--text-color);
}

.login-logo {
  text-align: center;
}

.login-logo svg {
  width: 60px;
  height: 60px;
  fill: var(--primary-color);
}

.login-container h1 {
  margin-bottom: 25px;
  font-size: 2.8rem;
  text-align: center;
  color: var(--text-color);
  position: relative;
}

.login-container h1::after {
  content: "";
  display: block;
  width: 120px;
  height: 3px;
  background-color: var(--primary-color);
  margin: 10px auto 0;
  border-radius: 2px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--text-color);
  font-size: 1.6rem;
}

.input-with-icon {
  position: relative;
}

.input-with-icon input {
  width: 100%;
  padding: 12px 12px 12px 40px;
  font-size: 1.6rem;
  border: 1px solid var(--border-color);
  border-radius: 5px;
  transition: border-color 0.2s;
  background-color: var(--input-background);
  color: var(--input-text);
}

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

.input-with-icon i {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--icon-color);
  font-size: 16px;
}

.login-btn {
  width: 100%;
  padding: 12px;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 5px;
  font-size: 1.6rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s;
  margin-top: 10px;
}

.login-btn:hover {
  background-color: #3f37c9;
}

.error-message {
  color: var(--error-color);
  font-size: 1.4rem;
  margin-bottom: 15px;
  text-align: center;
  padding: 12px;
  border-radius: 5px;
  background-color: rgba(220, 53, 69, 0.08);
  display: none;
  font-weight: 500;
  line-height: 1.4;
}

.forgot-password {
  display: block;
  text-align: right;
  margin-top: 10px;
  margin-bottom: 20px;
  font-size: 1.4rem;
  color: var(--forgot-password-color);
  text-decoration: none;
  cursor: pointer;
}

.forgot-password:hover {
  text-decoration: underline;
}

.shake {
  animation: shake 0.5s;
}

@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  10%,
  30%,
  50%,
  70%,
  90% {
    transform: translateX(-5px);
  }
  20%,
  40%,
  60%,
  80% {
    transform: translateX(5px);
  }
}


@media (max-width: 480px) {
  .login-container {
    padding: 30px 20px;
  }

  .input-with-icon input {
    padding: 10px 10px 10px 36px;
  }

  .login-btn {
    padding: 10px;
  }
}