:root {
  --login-bg: #030712;
  --login-card-bg: #0d1117;
  --login-border: #21262d;
  --login-border-focus: #388bfd;
  --login-input-bg: #090d16;
  --login-text: #f0f6fc;
  --login-text-muted: #8b949e;
  --login-btn-gradient: linear-gradient(135deg, #1f6feb 0%, #2f81f7 100%);
  --login-btn-hover: linear-gradient(135deg, #388bfd 0%, #1f6feb 100%);
  --login-shadow: 0 20px 45px rgba(0, 0, 0, 0.65), 0 0 60px rgba(31, 111, 235, 0.08);
}

body.login-page-body {
  background-color: var(--login-bg) !important;
  color: var(--login-text) !important;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif !important;
  min-height: 100vh;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow-x: hidden;
}

/* Ambient backdrop light */
.login-page-body::before {
  content: "";
  position: fixed;
  top: -15%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(31, 111, 235, 0.15) 0%, rgba(3, 7, 18, 0) 70%);
  pointer-events: none;
  z-index: 0;
}

.login-wrapper {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 440px;
  padding: 24px 16px;
  margin: auto;
}

.login-card {
  background: var(--login-card-bg);
  border: 1px solid var(--login-border);
  border-radius: 20px;
  padding: 40px 32px;
  box-shadow: var(--login-shadow);
  backdrop-filter: blur(12px);
  animation: loginCardFadeIn 0.35s ease-out;
}

@keyframes loginCardFadeIn {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Header & Shield Icon */
.login-header {
  text-align: center;
  margin-bottom: 30px;
}

.login-shield-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 58px;
  height: 58px;
  border-radius: 18px;
  background: rgba(31, 111, 235, 0.12);
  border: 1px solid rgba(56, 139, 253, 0.35);
  box-shadow: 0 0 25px rgba(31, 111, 235, 0.25);
  margin-bottom: 18px;
}

.login-shield-badge i {
  font-size: 28px;
  color: #58a6ff;
  line-height: 1;
}

.login-title {
  font-size: 24px;
  font-weight: 700;
  color: #f0f6fc;
  margin-bottom: 6px;
  letter-spacing: -0.02em;
}

.login-subtitle {
  font-size: 13.5px;
  color: var(--login-text-muted);
  margin: 0;
  line-height: 1.4;
}

/* Form Controls */
.login-field-group {
  margin-bottom: 20px;
}

.login-label {
  display: flex;
  align-items: center;
  font-size: 13.5px;
  font-weight: 500;
  color: #c9d1d9;
  margin-bottom: 8px;
}

.login-label i {
  font-size: 16px;
  margin-right: 6px;
  color: #58a6ff;
}

.login-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.login-input {
  width: 100%;
  height: 48px;
  background-color: var(--login-input-bg) !important;
  color: #ffffff !important;
  border: 1px solid var(--login-border) !important;
  border-radius: 10px !important;
  padding: 0 16px !important;
  font-size: 15px !important;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease !important;
}

.login-input::placeholder {
  color: #484f58 !important;
}

.login-input:focus {
  background-color: #0c121d !important;
  border-color: var(--login-border-focus) !important;
  box-shadow: 0 0 0 3px rgba(56, 139, 253, 0.2) !important;
  outline: none !important;
}

.input-password-field {
  padding-right: 44px !important;
}

.password-toggle-btn {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--login-text-muted);
  cursor: pointer;
  padding: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  transition: color 0.15s ease;
}

.password-toggle-btn:hover {
  color: #f0f6fc;
}

.password-toggle-btn i {
  font-size: 18px;
  line-height: 1;
}

/* 2FA Input */
.input-2fa-code {
  letter-spacing: 4px;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace !important;
  font-size: 16px !important;
  text-align: left;
}

.input-2fa-code::placeholder {
  letter-spacing: 6px;
}

.login-hint {
  display: block;
  font-size: 12px;
  color: var(--login-text-muted);
  margin-top: 8px;
  line-height: 1.4;
}

.login-divider {
  height: 1px;
  background: var(--login-border);
  margin: 24px 0 20px;
}

/* Submit Button */
.btn-login-submit {
  width: 100%;
  height: 48px;
  background: var(--login-btn-gradient) !important;
  border: none !important;
  border-radius: 10px !important;
  color: #ffffff !important;
  font-size: 15.5px !important;
  font-weight: 600 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 8px;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(31, 111, 235, 0.35) !important;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease !important;
}

.btn-login-submit:hover:not(:disabled) {
  background: var(--login-btn-hover) !important;
  box-shadow: 0 6px 20px rgba(56, 139, 253, 0.45) !important;
  transform: translateY(-1px);
}

.btn-login-submit:active:not(:disabled) {
  transform: translateY(0);
}

.btn-login-submit:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.btn-login-submit i {
  font-size: 18px;
  line-height: 1;
  transition: transform 0.15s ease;
}

.btn-login-submit:hover:not(:disabled) i {
  transform: translateX(3px);
}

/* Responsive adjustment */
@media (max-width: 480px) {
  .login-card {
    padding: 30px 20px;
    border-radius: 16px;
  }

  .login-title {
    font-size: 21px;
  }
}