:root {
  --login-bg-dark: #0d1117;
  --login-bg-light: #f7f9fb;
  --login-primary: #00ffff;
  --login-secondary: #007bff;
  --login-text-dark: #212529;
  --login-text-light: #e6edf3;
}

body.login-body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  overflow-y: auto;
  padding: clamp(1.25rem, 4vw, 2.5rem) 0;
  background: radial-gradient(circle at top left, rgba(0, 191, 255, 0.15), transparent 50%),
              radial-gradient(circle at bottom right, rgba(0, 255, 170, 0.1), transparent 55%),
              var(--login-bg-light);
  transition: background 0.6s ease;
  color: var(--login-text-dark);
}

[data-theme="dark"] .login-body,
body.login-body.theme-dark {
  background: radial-gradient(circle at top left, rgba(0, 255, 255, 0.15), transparent 55%),
              radial-gradient(circle at bottom right, rgba(0, 102, 255, 0.15), transparent 50%),
              var(--login-bg-dark);
  color: var(--login-text-light);
}

.login-wrapper {
  min-height: calc(100vh - clamp(2.5rem, 8vw, 4.5rem));
  width: 100%;
  padding-inline: clamp(1rem, 5vw, 2rem);
}

.particles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(120deg, rgba(0, 255, 255, 0.08), rgba(0, 102, 255, 0.1));
  mask-image: radial-gradient(circle at center, rgba(0,0,0,0.6), transparent 70%);
  animation: floatBg 16s infinite alternate ease-in-out;
}

@keyframes floatBg {
  from { transform: translateY(-10px); opacity: 0.9; }
  to   { transform: translateY(10px); opacity: 1; }
}

.login-card {
  position: relative;
  width: min(420px, 92vw);
  padding: clamp(2rem, 3vw, 2.75rem);
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(18px);
  background: linear-gradient(135deg, rgba(255,255,255,0.15), rgba(255,255,255,0.05));
  box-shadow: 0 25px 70px rgba(0, 0, 0, 0.25);
}

[data-theme="dark"] .login-card,
body.login-body.theme-dark .login-card {
  background: linear-gradient(135deg, rgba(13,17,23,0.85), rgba(13,17,23,0.65));
  border: 1px solid rgba(0, 255, 255, 0.15);
}

.fadeInUp {
  animation: fadeInUp 900ms ease-out;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translate3d(0, 40px, 0); }
  to   { opacity: 1; transform: translate3d(0, 0, 0); }
}

.login-logo {
  position: relative;
  margin: 0 auto 1.5rem;
  width: 88px;
  height: 88px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, 0.3);
  color: var(--login-primary);
  box-shadow: 0 0 18px rgba(0,255,255,0.7), 0 0 35px rgba(0,123,255,0.45);
}

.login-logo .logo-glow {
  position: absolute;
  inset: -5px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,255,255,0.6) 0%, transparent 65%);
  filter: blur(6px);
  z-index: -1;
}

.login-title {
  text-align: center;
  font-size: clamp(1.5rem, 4vw, 1.9rem);
  letter-spacing: .08em;
  margin-bottom: .25rem;
}

.login-subtitle {
  text-align: center;
  font-size: clamp(.95rem, 2vw, 1.05rem);
  opacity: .75;
  margin-bottom: 2rem;
}

.futuristic-input .input-group-text {
  border: none;
  background: transparent;
  color: var(--login-primary);
  font-size: 1.1rem;
}

.futuristic-input .form-control {
  border-radius: 12px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.25);
  color: inherit;
  padding-left: 3rem;
}

[data-theme="dark"] .futuristic-input .form-control,
body.login-body.theme-dark .futuristic-input .form-control {
  background: rgba(13,17,23,0.6);
  border: 1px solid rgba(0, 255, 255, 0.2);
  color: var(--login-text-light);
}

.futuristic-input .form-control:focus {
  box-shadow: 0 0 0 0.2rem rgba(0, 255, 255, 0.25);
  border-color: rgba(0, 255, 255, 0.6);
}

.futuristic-input .show-pass {
  position: absolute;
  right: .75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--login-primary);
  border: none;
  background: transparent;
  padding: 0;
}

.btn-gradient {
  background: linear-gradient(90deg, #00ffff 0%, #007bff 100%);
  border: none;
  border-radius: 12px;
  color: #0d1117;
  font-weight: 600;
  letter-spacing: .05em;
  padding: .85rem;
  box-shadow: 0 12px 30px rgba(0, 170, 255, 0.35);
  transition: transform .3s ease, box-shadow .3s ease;
  position: relative;
  overflow: hidden;
}

.btn-gradient:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 45px rgba(0, 170, 255, 0.45);
}

.btn-gradient .btn-spinner {
  display: none;
}

.btn-gradient.loading .btn-text { opacity: 0; }
.btn-gradient.loading .btn-spinner { display: inline-flex; }

.theme-toggle {
  color: var(--login-primary);
  border: 1px solid rgba(0,255,255,0.35);
  background: rgba(0,255,255,0.08);
}

.login-footer {
  text-align: center;
  margin-top: 1.75rem;
}

.login-footer a {
  color: var(--login-text-dark);
  text-decoration: none;
  transition: color .3s ease, text-shadow .3s ease;
  font-weight: 500;
}

[data-theme="dark"] .login-card .login-footer a,
body.login-body.theme-dark .login-footer a {
  color: var(--login-text-light);
}

.login-footer a:hover {
  color: var(--login-primary);
  text-shadow: 0 0 8px rgba(0,255,255,0.6);
}

.login-footer p {
  color: var(--login-text-dark);
}

[data-theme="dark"] .login-card .login-footer p,
body.login-body.theme-dark .login-footer p {
  color: var(--login-text-light);
}

@keyframes shake {
  10%, 90% { transform: translateX(-1px); }
  20%, 80% { transform: translateX(2px); }
  30%, 50%, 70% { transform: translateX(-4px); }
  40%, 60% { transform: translateX(4px); }
}

.login-card.shake {
  animation: shake 0.6s;
}

@media (max-width: 768px) {
  body.login-body {
    padding: 1.5rem 0;
  }
  .login-wrapper {
    min-height: auto;
  }
  .login-card {
    padding: 2.25rem;
  }
}

@media (max-width: 576px) {
  body.login-body {
    padding: 1.25rem 0.5rem;
  }
  .login-card {
    width: 100%;
  }
  .login-title {
    font-size: 1.45rem;
  }
  .login-subtitle {
    font-size: 0.95rem;
  }
  .futuristic-input .input-group-text {
    font-size: 1rem;
    padding-left: 0.75rem;
    padding-right: 0.75rem;
  }
  .futuristic-input .form-control {
    font-size: 0.95rem;
    padding: 0.85rem 0.75rem 0.85rem 2.4rem;
  }
  .form-floating > label {
    font-size: 0.85rem;
    padding-left: 2.4rem;
  }
  .login-footer {
    margin-top: 1.25rem;
  }
}