:root {
  --yellow: #FFD93D;
  --orange: #FF8C00;
  --purple: #2D1B69;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", sans-serif;
  background: linear-gradient(135deg, var(--purple) 0%, #4a2d8a 50%, #6b3fa0 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.login-container {
  width: 100%;
  max-width: 420px;
}

.login-header {
  text-align: center;
  margin-bottom: 32px;
}

.login-logo {
  font-size: 64px;
  margin-bottom: 16px;
}

.login-title {
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.login-subtitle {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
}

.login-card {
  background: #fff;
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

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

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: #333;
  margin-bottom: 8px;
}

.form-group input {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid #e5e5e5;
  border-radius: 10px;
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
  border-color: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 140, 0, 0.1);
}

.form-group input::placeholder {
  color: #bbb;
}

.error-message {
  background: #fff2f0;
  border: 1px solid #ffccc7;
  color: #ff4d4f;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 20px;
  display: none;
}

.error-message.show {
  display: block;
}

.login-btn {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--orange), #e67e00);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.login-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255, 140, 0, 0.3);
}

.login-btn:active {
  transform: translateY(0);
}

.login-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.login-footer {
  text-align: center;
  margin-top: 24px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}

@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }

  10%,
  30%,
  50%,
  70%,
  90% {
    transform: translateX(-5px);
  }

  20%,
  40%,
  60%,
  80% {
    transform: translateX(5px);
  }
}

.shake {
  animation: shake 0.5s ease-in-out;
}

.input-icon {
  position: relative;
}

.input-icon .icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
}

.input-icon input {
  padding-left: 44px;
}