/* Premium Admin Login Styles */
:root {
  --login-accent-rgb: 30, 58, 138;
  --login-accent-light-rgb: 61, 82, 166;
  --login-accent-dark-rgb: 21, 38, 92;
}

body.login-shell {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(ellipse at 12% 18%, rgba(var(--login-accent-rgb), 0.16) 0%, transparent 58%),
    radial-gradient(ellipse at 78% 72%, rgba(84, 102, 180, 0.14) 0%, transparent 60%),
    linear-gradient(180deg, var(--dark-bg) 0%, #0d1424 52%, var(--dark-bg) 100%);
  background-attachment: fixed;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  position: relative;
  overflow: hidden;
}

body.login-shell::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 20% 18%, rgba(var(--login-accent-rgb), 0.2) 0%, transparent 46%),
    radial-gradient(circle at 82% 78%, rgba(108, 96, 198, 0.16) 0%, transparent 52%),
    radial-gradient(circle at 50% 50%, rgba(105, 158, 230, 0.1) 0%, transparent 70%);
  filter: blur(4px);
  animation: loginGlow 32s ease-in-out infinite;
  z-index: -1;
}

.login-container {
  width: 100%;
  max-width: 480px;
}

.login-card {
  position: relative;
  background: linear-gradient(145deg, rgba(12, 19, 28, 0.88), rgba(18, 27, 40, 0.84));
  border: 1px solid rgba(148, 163, 184, 0.28);
  border-radius: 28px;
  padding: 54px 44px;
  backdrop-filter: blur(24px);
  box-shadow: 0 28px 70px -32px rgba(15, 23, 42, 0.9);
  overflow: hidden;
}

.login-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 12% 20%, rgba(var(--login-accent-rgb), 0.2), transparent 52%),
    radial-gradient(circle at 88% 80%, rgba(108, 96, 198, 0.2), transparent 58%);
  opacity: 0.6;
  pointer-events: none;
}

.login-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light), var(--accent-gold));
  opacity: 0.9;
}

.login-header {
  position: relative;
  text-align: center;
  margin-bottom: 40px;
  z-index: 1;
}

.login-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(var(--login-accent-rgb), 0.18);
  border: 1px solid rgba(var(--login-accent-rgb), 0.32);
  color: rgba(var(--login-accent-light-rgb), 0.9);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.login-title {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 6px 20px rgba(var(--login-accent-rgb), 0.22));
}

.login-subtitle {
  margin: 14px 0 0;
  color: var(--text-muted);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.login-divider {
  width: 72px;
  height: 1px;
  margin: 28px auto 0;
  background: linear-gradient(90deg, transparent, rgba(var(--login-accent-rgb), 0.4), transparent);
}

.login-form {
  position: relative;
  z-index: 1;
}

.login-form-group {
  margin-bottom: 22px;
  position: relative;
}

.login-label {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 10px;
  display: block;
}

.login-input {
  width: 100%;
  padding: 18px 22px;
  border-radius: 16px;
  border: 1px solid rgba(148, 163, 184, 0.28);
  background: rgba(12, 19, 28, 0.8);
  color: var(--text);
  font-size: 1.05rem;
  font-weight: 600;
  box-sizing: border-box;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

.login-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(var(--login-accent-rgb), 0.16);
  background: rgba(17, 25, 36, 0.92);
}

.login-input::placeholder {
  color: rgba(255, 255, 255, 0.55);
  font-weight: 500;
}

.login-actions {
  margin-top: 32px;
}

.login-btn {
  width: 100%;
  padding: 18px 26px;
  border-radius: 16px;
  border: none;
  background: linear-gradient(135deg, rgba(var(--login-accent-dark-rgb), 0.95), rgba(var(--login-accent-rgb), 0.85));
  color: #e7ecff;
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  cursor: pointer;
  box-shadow: 0 18px 46px -22px rgba(var(--login-accent-rgb), 0.42);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}

.login-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.18), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}

.login-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 24px 54px -22px rgba(var(--login-accent-rgb), 0.5);
}

.login-btn:hover::before {
  transform: translateX(100%);
}

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

.error-message {
  position: relative;
  z-index: 1;
  margin-bottom: 24px;
  border-radius: 18px;
  padding: 16px 18px;
  background: linear-gradient(135deg, rgba(255, 107, 107, 0.22), rgba(255, 107, 107, 0.08));
  border: 1px solid rgba(255, 107, 107, 0.32);
  color: #ff6b6b;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 12px;
  animation: loginError 0.5s ease;
}

.error-icon {
  font-size: 1.3rem;
}

.login-footer {
  position: relative;
  margin-top: 36px;
  text-align: center;
  z-index: 1;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border-radius: 14px;
  border: 1px solid rgba(148, 163, 184, 0.28);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: transform 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

.back-btn:hover {
  transform: translateY(-1px);
  border-color: rgba(var(--login-accent-rgb), 0.5);
  color: var(--primary-light);
}

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

.login-meta {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 28px;
  text-align: center;
}

.login-note {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.login-note strong {
  color: var(--primary-light);
}

:root[data-theme='light'] .login-shell {
  background:
    radial-gradient(ellipse at 12% 18%, rgba(var(--login-accent-rgb), 0.18) 0%, transparent 58%),
    radial-gradient(ellipse at 78% 72%, rgba(94, 129, 255, 0.14) 0%, transparent 60%),
    linear-gradient(180deg, #ffffff 0%, #f8fafc 52%, #ffffff 100%) !important;
}

:root[data-theme='light'] .login-card {
  background: linear-gradient(145deg, #ffffff, #f8fafc) !important;
  border: 1px solid rgba(226, 232, 240, 0.8) !important;
  box-shadow: 0 30px 70px -32px rgba(15, 23, 42, 0.2) !important;
}

:root[data-theme='light'] .login-card::before {
  background:
    radial-gradient(circle at 12% 20%, rgba(var(--login-accent-rgb), 0.26), transparent 52%),
    radial-gradient(circle at 88% 80%, rgba(139, 69, 193, 0.22), transparent 58%) !important;
}

:root[data-theme='light'] .login-input {
  background: rgba(255, 255, 255, 0.96) !important;
  border-color: rgba(226, 232, 240, 0.85) !important;
  color: #132032 !important;
}

:root[data-theme='light'] .login-input::placeholder {
  color: rgba(71, 85, 105, 0.75) !important;
}

:root[data-theme='light'] .back-btn {
  background: rgba(241, 245, 249, 0.82) !important;
  border-color: rgba(226, 232, 240, 0.8) !important;
  color: #475569 !important;
}

@media (max-width: 540px) {
  body.login-shell {
    padding: 32px 16px;
  }

  .login-card {
    padding: 38px 28px;
  }

  .login-title {
    font-size: clamp(1.9rem, 8vw, 2.5rem);
  }

  .login-chip {
    font-size: 0.7rem;
  }

  .login-input {
    padding: 16px 20px;
    font-size: 1rem;
  }

  .login-btn {
    padding: 16px 22px;
  }
}

@keyframes loginGlow {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.88; transform: scale(1.05); }
}

@keyframes loginError {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}