/* StudyCore 12 — Auth / Password Lock Screen */

.auth-screen {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.auth-card {
  width: 100%;
  max-width: 380px;
  text-align: center;
  animation: authCardIn 0.6s var(--ease-out-expo) both;
}

@keyframes authCardIn {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.auth-logo {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  margin: 0 auto 20px;
  background: rgba(255,255,255,0.1);
  padding: 6px;
  animation: authLogoPulse 2s ease-in-out infinite;
}

@keyframes authLogoPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255,255,255,0.15); }
  50% { box-shadow: 0 0 0 12px rgba(255,255,255,0); }
}

.auth-title {
  font-size: 1.75rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.03em;
  margin-bottom: 6px;
}

.auth-subtitle {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.5);
  margin-bottom: 32px;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.auth-input-wrap {
  position: relative;
  width: 100%;
}

.auth-input {
  width: 100%;
  padding: 14px 48px 14px 18px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 10px;
  color: #fff;
  font-size: 1rem;
  outline: none;
  transition: all 0.25s ease;
  text-align: center;
  letter-spacing: 0.1em;
}

.auth-eye-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  padding: 6px;
  border-radius: 6px;
  color: rgba(255,255,255,0.4);
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.auth-eye-btn:hover {
  color: rgba(255,255,255,0.8);
  background: rgba(255,255,255,0.08);
}

.auth-eye-btn:active {
  transform: translateY(-50%) scale(0.9);
}

.auth-eye-icon {
  display: block;
}

.auth-input-icon {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: rgba(255,255,255,0.3);
  pointer-events: none;
  display: flex;
  align-items: center;
}

.auth-input::placeholder {
  color: rgba(255,255,255,0.3);
  letter-spacing: 0.05em;
}

.auth-input:focus {
  border-color: rgba(255,255,255,0.4);
  background: rgba(255,255,255,0.12);
  box-shadow: 0 0 0 3px rgba(255,255,255,0.06);
}

.auth-btn {
  width: 100%;
  padding: 14px;
  background: #fff;
  color: var(--bg-dark);
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  letter-spacing: 0.02em;
}

.auth-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255,255,255,0.15);
}

.auth-btn:active {
  transform: translateY(0) scale(0.98);
}

.auth-error {
  color: #ff6b6b;
  font-size: 0.8125rem;
  margin-top: 4px;
  animation: authErrorShake 0.4s ease;
}

@keyframes authErrorShake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  40% { transform: translateX(8px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

.auth-timer-section {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.auth-timer-label {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.4);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.auth-timer {
  font-size: 2rem;
  font-weight: 800;
  color: #fff;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.auth-logout-btn {
  padding: 10px 20px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 8px;
  color: rgba(255,255,255,0.6);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.auth-logout-btn:hover {
  background: rgba(255,255,255,0.12);
  color: #fff;
}

.app-hidden {
  display: none;
}

/* Shake on wrong password */
.auth-input.shake {
  animation: inputShake 0.4s ease;
}

@keyframes inputShake {
  0%, 100% { transform: translateX(0); border-color: rgba(255,255,255,0.12); }
  20% { transform: translateX(-6px); border-color: #ff6b6b; }
  40% { transform: translateX(6px); border-color: #ff6b6b; }
  60% { transform: translateX(-3px); border-color: #ff6b6b; }
  80% { transform: translateX(3px); border-color: #ff6b6b; }
}

/* Success state */
.auth-input.success {
  border-color: #51cf66;
  background: rgba(81, 207, 102, 0.08);
}

.auth-btn.success {
  background: #51cf66;
  color: #fff;
}

/* Mobile */
@media (max-width: 480px) {
  .auth-card {
    max-width: 100%;
  }

  .auth-title {
    font-size: 1.5rem;
  }

  .auth-timer {
    font-size: 1.5rem;
  }
}