* { margin: 0; padding: 0; box-sizing: border-box; }
html, body {
  width: 100%;
  margin: 0;
  padding: 0;
}
body {
  min-height: 100vh;
  background: linear-gradient(135deg, #0a1628 0%, #1a2a4a 50%, #0d1f3c 100%);
  font-family: 'Inter', sans-serif;
  display: grid;
  place-items: center;
  padding: 12px;
}
.login-wrapper {
  width: 100%;
  max-width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
@media (min-width: 481px) {
  .login-wrapper {
    max-width: 400px;
  }
}
.login-panel {
  background: rgba(255,255,255,0.04);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 20px;
  padding: 45px 40px 40px;
  text-align: center;
  width: 100%;
  max-width: 100%;
}
.login-panel .logo {
  max-width: 220px;
  margin-bottom: 8px;
  opacity: 0.95;
}
.login-panel .app-label {
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: rgba(255,255,255,0.4);
  margin-bottom: 35px;
}
.login-panel .divider {
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(234,170,0,0.5), transparent);
  margin: 0 auto 30px;
}
.field {
  position: relative;
  margin-bottom: 18px;
}
.field input {
  width: 100%;
  padding: 14px 18px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 10px;
  color: #fff;
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  font-weight: 300;
  outline: none;
  transition: all 0.3s ease;
}
.field input::placeholder {
  color: rgba(255,255,255,0.3);
  font-weight: 300;
}
.field input:focus {
  border-color: rgba(234,170,0,0.4);
  background: rgba(255,255,255,0.08);
  box-shadow: 0 0 20px rgba(234,170,0,0.06);
}
.step { display: none; }
.step.active { display: block; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.back-link {
  display: inline-block;
  font-size: 20px;
  cursor: pointer;
  color: rgba(255,255,255,0.4);
  transition: color 0.2s;
  margin-bottom: 20px;
}
.back-link:hover { color: rgba(234,170,0,0.8); }
.info-text {
  color: rgba(255,255,255,0.6);
  font-size: 13px;
  margin: 12px 0 24px;
  line-height: 1.5;
}
.info-text strong { color: rgba(234,170,0,0.8); }
.warning-box {
  background: rgba(220,53,69,0.1);
  border: 1px solid rgba(220,53,69,0.2);
  border-radius: 10px;
  padding: 20px;
  margin: 24px 0;
  text-align: left;
}
.warning-box .icon {
  font-size: 24px;
  margin-bottom: 8px;
  color: rgba(220,53,69,0.6);
}
.warning-box p {
  color: rgba(255,255,255,0.6);
  font-size: 13px;
  margin: 0;
}
.btn-enter {
  width: 100%;
  padding: 14px;
  margin-top: 8px;
  background: linear-gradient(135deg, #e8a800, #c48d00);
  border: none;
  border-radius: 10px;
  color: #0a1628;
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.3s ease;
}
.btn-enter:hover {
  background: linear-gradient(135deg, #f0b400, #d49a00);
  box-shadow: 0 4px 20px rgba(234,170,0,0.25);
  transform: translateY(-1px);
}
.btn-enter:active { transform: translateY(0); }
.btn-back {
  width: 100%;
  padding: 12px;
  margin-top: 12px;
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.6);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 10px;
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 500;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.3s ease;
}
.btn-back:hover {
  background: rgba(255,255,255,0.08);
  color: #fff;
}
.pwd-hint {
  font-size: 12px;
  color: rgba(255,255,255,0.4);
  margin-top: 8px;
}
.options {
  text-align: center;
  margin-top: 20px;
}
.options a {
  color: rgba(234,170,0,0.7);
  text-decoration: none;
  font-size: 13px;
  transition: color 0.2s;
}
.options a:hover { color: rgba(234,170,0,0.9); }
.spinner {
  display: none;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.2);
  border-top-color: rgba(234,170,0,0.8);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin: 0 auto;
}
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  15%, 45%, 75% { transform: translateX(-3px); }
  30%, 60%, 90% { transform: translateX(3px); }
}
.shake { animation: shake 0.35s ease; }
.error-toast {
  position: absolute;
  top: -50px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(220,53,69,0.85);
  backdrop-filter: blur(10px);
  color: #fff;
  font-size: 13px;
  font-weight: 400;
  padding: 10px 24px;
  border-radius: 8px;
  white-space: nowrap;
  opacity: 0;
  animation: toastIn 0.3s ease forwards;
}
@keyframes toastIn {
  0% { opacity: 0; top: -30px; }
  100% { opacity: 1; top: -50px; }
}
@keyframes toastOut {
  0% { opacity: 1; }
  100% { opacity: 0; }
}

/* Responsive: tablets (768px and below) */
@media (max-width: 768px) {
  .login-panel {
    padding: 40px 32px 36px;
  }
  .login-panel .logo {
    max-width: 200px;
  }
  .field input {
    padding: 13px 16px;
    font-size: 15px;
  }
}

/* Responsive: smartphones (480px and below) */
@media (max-width: 480px) {
  body {
    padding: 8px;
  }
  .login-panel {
    padding: 28px 14px 24px;
    width: 100%;
    max-width: calc(100% - 16px);
  }
  .login-panel .logo {
    max-width: 140px;
    margin-bottom: 8px;
  }
  .login-panel .app-label {
    font-size: 10px;
    margin-bottom: 18px;
  }
  .login-panel .divider {
    margin-bottom: 22px;
  }
  .field {
    margin-bottom: 14px;
  }
  .field input {
    padding: 12px 14px;
    font-size: 16px;
    border-radius: 8px;
  }
  .btn-enter, .btn-back {
    padding: 12px;
    font-size: 13px;
    margin-top: 8px;
  }
  .btn-back {
    margin-top: 6px;
  }
  .back-link {
    font-size: 18px;
    margin-bottom: 14px;
  }
  .info-text {
    font-size: 12px;
    margin: 6px 0 14px;
  }
  .pwd-hint {
    font-size: 11px;
    margin-top: 4px;
  }
  .warning-box {
    padding: 12px;
    margin: 12px 0;
  }
  .error-toast {
    white-space: normal;
    max-width: 85%;
    padding: 8px 12px;
    font-size: 12px;
  }
  .spinner {
    width: 18px;
    height: 18px;
  }
}

/* Responsive: small devices (360px and below) */
@media (max-width: 360px) {
  .login-panel {
    padding: 28px 16px 24px;
  }
  .login-panel .logo {
    max-width: 120px;
    margin-bottom: 6px;
  }
  .field input {
    font-size: 16px;
    padding: 11px 12px;
  }
  .btn-enter, .btn-back {
    padding: 11px;
    font-size: 12px;
  }
}